./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/xor4.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/array-crafted/xor4.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-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 32bit --witnessprinter.graph.data.programhash 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 09:53:31,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 09:53:31,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 09:53:31,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 09:53:31,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 09:53:31,532 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 09:53:31,533 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 09:53:31,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 09:53:31,541 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 09:53:31,542 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 09:53:31,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 09:53:31,543 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 09:53:31,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 09:53:31,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 09:53:31,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 09:53:31,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 09:53:31,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 09:53:31,552 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 09:53:31,553 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 09:53:31,557 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 09:53:31,558 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 09:53:31,559 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 09:53:31,560 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 09:53:31,560 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 09:53:31,561 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 09:53:31,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 09:53:31,563 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 09:53:31,563 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 09:53:31,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 09:53:31,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 09:53:31,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 09:53:31,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 09:53:31,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 09:53:31,565 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 09:53:31,566 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 09:53:31,567 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 09:53:31,567 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 09:53:31,567 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 09:53:31,567 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 09:53:31,568 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 09:53:31,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 09:53:31,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 09:53:31,569 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 09:53:31,584 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 09:53:31,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 09:53:31,585 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 09:53:31,585 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 09:53:31,586 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 09:53:31,586 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 09:53:31,586 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 09:53:31,586 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 09:53:31,587 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 09:53:31,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 09:53:31,592 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 09:53:31,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 09:53:31,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 09:53:31,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 09:53:31,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 09:53:31,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 09:53:31,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 09:53:31,593 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 09:53:31,593 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 09:53:31,593 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 09:53:31,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 09:53:31,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 09:53:31,594 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 09:53:31,594 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 09:53:31,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:53:31,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 09:53:31,595 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 09:53:31,595 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 09:53:31,595 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 09:53:31,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 09:53:31,595 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 09:53:31,595 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 09:53:31,596 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 09:53:31,596 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90b7e6947bda838aad0c5e01877b9a712c46c1a2dc1a2af9f1fb1c6266593b6a [2022-07-19 09:53:31,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 09:53:31,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 09:53:31,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 09:53:31,828 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 09:53:31,828 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 09:53:31,829 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/xor4.i [2022-07-19 09:53:31,879 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c82d73e6/8e8e211f078f4ed1bf044c49d96a1921/FLAG4d99fbede [2022-07-19 09:53:32,244 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 09:53:32,244 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor4.i [2022-07-19 09:53:32,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c82d73e6/8e8e211f078f4ed1bf044c49d96a1921/FLAG4d99fbede [2022-07-19 09:53:32,278 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c82d73e6/8e8e211f078f4ed1bf044c49d96a1921 [2022-07-19 09:53:32,280 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 09:53:32,281 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 09:53:32,285 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 09:53:32,285 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 09:53:32,287 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 09:53:32,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,288 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@362ec7aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32, skipping insertion in model container [2022-07-19 09:53:32,289 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 09:53:32,317 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 09:53:32,471 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2022-07-19 09:53:32,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:53:32,518 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 09:53:32,539 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/xor4.i[1303,1316] [2022-07-19 09:53:32,541 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 09:53:32,550 INFO L208 MainTranslator]: Completed translation [2022-07-19 09:53:32,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32 WrapperNode [2022-07-19 09:53:32,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 09:53:32,551 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 09:53:32,552 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 09:53:32,552 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 09:53:32,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,562 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,575 INFO L137 Inliner]: procedures = 16, calls = 30, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 74 [2022-07-19 09:53:32,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 09:53:32,576 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 09:53:32,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 09:53:32,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 09:53:32,583 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,583 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,590 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 09:53:32,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 09:53:32,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 09:53:32,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 09:53:32,599 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (1/1) ... [2022-07-19 09:53:32,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 09:53:32,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:32,631 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) [2022-07-19 09:53:32,637 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 [2022-07-19 09:53:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 09:53:32,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 09:53:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 09:53:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 09:53:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 09:53:32,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 09:53:32,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 09:53:32,674 INFO L130 BoogieDeclarations]: Found specification of procedure xor [2022-07-19 09:53:32,675 INFO L138 BoogieDeclarations]: Found implementation of procedure xor [2022-07-19 09:53:32,675 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 09:53:32,720 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 09:53:32,722 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 09:53:32,817 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 09:53:32,822 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 09:53:32,822 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-19 09:53:32,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:53:32 BoogieIcfgContainer [2022-07-19 09:53:32,824 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 09:53:32,825 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 09:53:32,825 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 09:53:32,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 09:53:32,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 09:53:32" (1/3) ... [2022-07-19 09:53:32,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4b90e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:53:32, skipping insertion in model container [2022-07-19 09:53:32,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 09:53:32" (2/3) ... [2022-07-19 09:53:32,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4b90e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 09:53:32, skipping insertion in model container [2022-07-19 09:53:32,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 09:53:32" (3/3) ... [2022-07-19 09:53:32,830 INFO L111 eAbstractionObserver]: Analyzing ICFG xor4.i [2022-07-19 09:53:32,840 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 09:53:32,840 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 09:53:32,872 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 09:53:32,877 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e169763, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@42c8460f [2022-07-19 09:53:32,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 09:53:32,881 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 09:53:32,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:32,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:32,889 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:32,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:32,893 INFO L85 PathProgramCache]: Analyzing trace with hash -141219973, now seen corresponding path program 1 times [2022-07-19 09:53:32,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:32,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822532362] [2022-07-19 09:53:32,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:32,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 09:53:33,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-07-19 09:53:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 09:53:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 09:53:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:33,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822532362] [2022-07-19 09:53:33,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822532362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:33,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257577590] [2022-07-19 09:53:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:33,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:33,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:33,080 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) [2022-07-19 09:53:33,082 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 09:53:33,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 09:53:33,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:33,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:33,217 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:53:33,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257577590] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:33,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 09:53:33,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 09:53:33,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545507535] [2022-07-19 09:53:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:33,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:53:33,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:33,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:53:33,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:53:33,249 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:33,276 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-07-19 09:53:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:53:33,278 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-07-19 09:53:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:33,283 INFO L225 Difference]: With dead ends: 50 [2022-07-19 09:53:33,284 INFO L226 Difference]: Without dead ends: 24 [2022-07-19 09:53:33,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:53:33,289 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:33,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:33,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-19 09:53:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-07-19 09:53:33,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-07-19 09:53:33,325 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-07-19 09:53:33,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:33,326 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-07-19 09:53:33,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 09:53:33,326 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-07-19 09:53:33,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 09:53:33,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:33,328 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:33,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 09:53:33,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-07-19 09:53:33,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash -618478211, now seen corresponding path program 1 times [2022-07-19 09:53:33,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989752593] [2022-07-19 09:53:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:33,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-19 09:53:33,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-19 09:53:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-07-19 09:53:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 09:53:33,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:33,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989752593] [2022-07-19 09:53:33,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989752593] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:33,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523974793] [2022-07-19 09:53:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:33,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:33,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:33,707 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) [2022-07-19 09:53:33,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 09:53:33,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:33,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 09:53:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 09:53:33,769 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:53:33,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523974793] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:33,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 09:53:33,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-19 09:53:33,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174071158] [2022-07-19 09:53:33,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:33,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:53:33,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:33,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:53:33,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:53:33,771 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 09:53:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:33,778 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-07-19 09:53:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:53:33,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-19 09:53:33,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:33,780 INFO L225 Difference]: With dead ends: 42 [2022-07-19 09:53:33,780 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 09:53:33,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 09:53:33,781 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:33,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:33,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 09:53:33,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-07-19 09:53:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:33,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-19 09:53:33,785 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-07-19 09:53:33,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:33,785 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-19 09:53:33,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 09:53:33,786 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-19 09:53:33,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 09:53:33,786 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:33,786 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:33,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:34,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-07-19 09:53:34,004 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:34,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:34,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1511029509, now seen corresponding path program 1 times [2022-07-19 09:53:34,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:34,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768017564] [2022-07-19 09:53:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:34,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:34,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-19 09:53:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 09:53:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 09:53:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 09:53:34,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768017564] [2022-07-19 09:53:34,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768017564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969363331] [2022-07-19 09:53:34,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:34,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:34,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:34,094 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) [2022-07-19 09:53:34,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 09:53:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 09:53:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 09:53:34,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 09:53:34,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969363331] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 09:53:34,170 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 09:53:34,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-07-19 09:53:34,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79505827] [2022-07-19 09:53:34,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 09:53:34,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 09:53:34,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:34,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 09:53:34,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:53:34,172 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 09:53:34,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:34,185 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-19 09:53:34,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 09:53:34,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-07-19 09:53:34,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:34,186 INFO L225 Difference]: With dead ends: 39 [2022-07-19 09:53:34,186 INFO L226 Difference]: Without dead ends: 26 [2022-07-19 09:53:34,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-19 09:53:34,191 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:34,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:34,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-19 09:53:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-07-19 09:53:34,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:34,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-07-19 09:53:34,200 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-07-19 09:53:34,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:34,201 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-07-19 09:53:34,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-19 09:53:34,202 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-07-19 09:53:34,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 09:53:34,205 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:34,205 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:34,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:34,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:34,416 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:34,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1553738215, now seen corresponding path program 1 times [2022-07-19 09:53:34,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:34,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296329091] [2022-07-19 09:53:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:34,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:34,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-07-19 09:53:34,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-07-19 09:53:34,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-07-19 09:53:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 09:53:34,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:34,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296329091] [2022-07-19 09:53:34,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296329091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:34,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748896493] [2022-07-19 09:53:34,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:34,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:34,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:34,528 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) [2022-07-19 09:53:34,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 09:53:34,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 09:53:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:34,635 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-19 09:53:34,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-07-19 09:53:34,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748896493] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:34,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:34,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-07-19 09:53:34,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691882574] [2022-07-19 09:53:34,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:34,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 09:53:34,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:34,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 09:53:34,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 09:53:34,666 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:34,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:34,692 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-19 09:53:34,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 09:53:34,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-07-19 09:53:34,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:34,693 INFO L225 Difference]: With dead ends: 54 [2022-07-19 09:53:34,693 INFO L226 Difference]: Without dead ends: 34 [2022-07-19 09:53:34,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-19 09:53:34,694 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:34,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-19 09:53:34,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-07-19 09:53:34,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-07-19 09:53:34,698 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-07-19 09:53:34,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:34,699 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-07-19 09:53:34,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-07-19 09:53:34,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-19 09:53:34,699 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:34,700 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:34,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 09:53:34,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:34,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:34,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:34,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1124150243, now seen corresponding path program 2 times [2022-07-19 09:53:34,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:34,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597440649] [2022-07-19 09:53:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:34,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:34,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:34,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 09:53:34,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:35,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-07-19 09:53:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:35,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-07-19 09:53:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-07-19 09:53:35,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597440649] [2022-07-19 09:53:35,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597440649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:35,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944203821] [2022-07-19 09:53:35,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:53:35,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:35,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:35,034 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) [2022-07-19 09:53:35,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 09:53:35,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:53:35,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:35,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 09:53:35,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 09:53:35,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:35,274 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 09:53:35,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944203821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:35,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:35,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-07-19 09:53:35,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248007336] [2022-07-19 09:53:35,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:35,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 09:53:35,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:35,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 09:53:35,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:53:35,276 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:53:35,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:35,311 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-07-19 09:53:35,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 09:53:35,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-07-19 09:53:35,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:35,312 INFO L225 Difference]: With dead ends: 70 [2022-07-19 09:53:35,312 INFO L226 Difference]: Without dead ends: 48 [2022-07-19 09:53:35,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-07-19 09:53:35,313 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:35,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:35,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-07-19 09:53:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-07-19 09:53:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-07-19 09:53:35,322 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-07-19 09:53:35,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:35,322 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-07-19 09:53:35,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-19 09:53:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-07-19 09:53:35,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 09:53:35,323 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:35,324 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:35,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:35,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:35,537 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:35,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1238744391, now seen corresponding path program 3 times [2022-07-19 09:53:35,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:35,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369475874] [2022-07-19 09:53:35,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:35,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:35,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 09:53:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-07-19 09:53:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:35,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:53:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:35,678 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-19 09:53:35,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:35,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369475874] [2022-07-19 09:53:35,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369475874] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:35,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608081278] [2022-07-19 09:53:35,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:53:35,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:35,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:35,708 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) [2022-07-19 09:53:35,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 09:53:35,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 09:53:35,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:35,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:53:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:35,801 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-19 09:53:35,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:35,836 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-07-19 09:53:35,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608081278] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:35,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:35,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-19 09:53:35,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552749885] [2022-07-19 09:53:35,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:35,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 09:53:35,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:35,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 09:53:35,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-19 09:53:35,839 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:35,858 INFO L93 Difference]: Finished difference Result 78 states and 91 transitions. [2022-07-19 09:53:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 09:53:35,859 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-07-19 09:53:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:35,860 INFO L225 Difference]: With dead ends: 78 [2022-07-19 09:53:35,860 INFO L226 Difference]: Without dead ends: 55 [2022-07-19 09:53:35,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-07-19 09:53:35,861 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:35,861 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 68 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:35,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-07-19 09:53:35,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-07-19 09:53:35,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:35,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2022-07-19 09:53:35,866 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 64 [2022-07-19 09:53:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:35,867 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2022-07-19 09:53:35,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:35,867 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2022-07-19 09:53:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-07-19 09:53:35,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:35,868 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:35,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:36,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:36,087 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:36,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:36,087 INFO L85 PathProgramCache]: Analyzing trace with hash 756543039, now seen corresponding path program 4 times [2022-07-19 09:53:36,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:36,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630043766] [2022-07-19 09:53:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:36,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:36,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:36,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 09:53:36,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:36,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-07-19 09:53:36,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:36,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 09:53:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-19 09:53:36,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630043766] [2022-07-19 09:53:36,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630043766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:36,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445449529] [2022-07-19 09:53:36,251 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:53:36,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:36,272 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:36,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 09:53:36,368 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:53:36,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:36,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 09:53:36,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:36,409 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-19 09:53:36,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 479 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-19 09:53:36,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445449529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:36,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:36,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-19 09:53:36,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16692209] [2022-07-19 09:53:36,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:36,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 09:53:36,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:36,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 09:53:36,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:53:36,573 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:36,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:36,634 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2022-07-19 09:53:36,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 09:53:36,634 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 88 [2022-07-19 09:53:36,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:36,635 INFO L225 Difference]: With dead ends: 111 [2022-07-19 09:53:36,635 INFO L226 Difference]: Without dead ends: 79 [2022-07-19 09:53:36,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-19 09:53:36,636 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:36,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 112 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 09:53:36,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-19 09:53:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-07-19 09:53:36,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:36,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-07-19 09:53:36,641 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 88 [2022-07-19 09:53:36,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:36,642 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-07-19 09:53:36,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 25 states have internal predecessors, (69), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:36,642 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-07-19 09:53:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-07-19 09:53:36,643 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:36,643 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:36,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:36,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:36,844 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:36,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1325683031, now seen corresponding path program 5 times [2022-07-19 09:53:36,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:36,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130844939] [2022-07-19 09:53:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:36,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:36,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:37,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 09:53:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:37,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-07-19 09:53:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:37,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-07-19 09:53:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:37,162 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-07-19 09:53:37,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:37,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130844939] [2022-07-19 09:53:37,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130844939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:37,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493875972] [2022-07-19 09:53:37,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:53:37,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:37,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:37,167 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:37,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 09:53:38,030 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2022-07-19 09:53:38,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:38,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:53:38,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2022-07-19 09:53:38,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:38,254 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2022-07-19 09:53:38,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493875972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:38,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:38,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9, 9] total 39 [2022-07-19 09:53:38,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531485194] [2022-07-19 09:53:38,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:38,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 09:53:38,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 09:53:38,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:53:38,257 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:38,333 INFO L93 Difference]: Finished difference Result 130 states and 149 transitions. [2022-07-19 09:53:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 09:53:38,334 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 112 [2022-07-19 09:53:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:38,335 INFO L225 Difference]: With dead ends: 130 [2022-07-19 09:53:38,335 INFO L226 Difference]: Without dead ends: 98 [2022-07-19 09:53:38,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=419, Invalid=1063, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 09:53:38,337 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:38,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 202 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:53:38,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-19 09:53:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-07-19 09:53:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-07-19 09:53:38,343 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 112 [2022-07-19 09:53:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:38,343 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-07-19 09:53:38,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.5641025641025643) internal successors, (100), 39 states have internal predecessors, (100), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:38,344 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-07-19 09:53:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-07-19 09:53:38,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:38,345 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 23, 23, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:38,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:38,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-07-19 09:53:38,566 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:38,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:38,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2024695735, now seen corresponding path program 6 times [2022-07-19 09:53:38,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:38,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043375333] [2022-07-19 09:53:38,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:38,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:38,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-07-19 09:53:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:38,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-07-19 09:53:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:38,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2022-07-19 09:53:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1867 trivial. 0 not checked. [2022-07-19 09:53:38,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:38,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043375333] [2022-07-19 09:53:38,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043375333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:38,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026807904] [2022-07-19 09:53:38,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 09:53:38,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:38,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:38,904 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:38,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 09:53:39,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-19 09:53:39,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 09:53:39,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 850 proven. 4 refuted. 0 times theorem prover too weak. 1542 trivial. 0 not checked. [2022-07-19 09:53:39,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:39,193 INFO L134 CoverageAnalysis]: Checked inductivity of 2396 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2392 trivial. 0 not checked. [2022-07-19 09:53:39,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026807904] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:39,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:39,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 5, 5] total 32 [2022-07-19 09:53:39,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346179942] [2022-07-19 09:53:39,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:39,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 09:53:39,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:39,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 09:53:39,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-07-19 09:53:39,196 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:39,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:39,285 INFO L93 Difference]: Finished difference Result 156 states and 168 transitions. [2022-07-19 09:53:39,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 09:53:39,285 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 162 [2022-07-19 09:53:39,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:39,286 INFO L225 Difference]: With dead ends: 156 [2022-07-19 09:53:39,286 INFO L226 Difference]: Without dead ends: 108 [2022-07-19 09:53:39,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2022-07-19 09:53:39,291 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 33 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:39,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 178 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:53:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-19 09:53:39,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-07-19 09:53:39,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:39,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2022-07-19 09:53:39,310 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 162 [2022-07-19 09:53:39,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:39,310 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2022-07-19 09:53:39,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.71875) internal successors, (87), 32 states have internal predecessors, (87), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:39,311 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2022-07-19 09:53:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-19 09:53:39,315 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:39,315 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 24, 24, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:39,343 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 09:53:39,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:39,544 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:39,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:39,544 INFO L85 PathProgramCache]: Analyzing trace with hash -615578557, now seen corresponding path program 7 times [2022-07-19 09:53:39,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:39,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010108027] [2022-07-19 09:53:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:39,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:39,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-19 09:53:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:39,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-07-19 09:53:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:39,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-19 09:53:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-19 09:53:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010108027] [2022-07-19 09:53:39,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010108027] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:39,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530973518] [2022-07-19 09:53:39,912 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 09:53:39,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:39,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:39,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:39,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 09:53:40,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:40,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 09:53:40,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-19 09:53:40,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-19 09:53:40,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530973518] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:40,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:40,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2022-07-19 09:53:40,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998600182] [2022-07-19 09:53:40,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:40,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 09:53:40,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 09:53:40,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 09:53:40,873 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:40,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:40,980 INFO L93 Difference]: Finished difference Result 215 states and 248 transitions. [2022-07-19 09:53:40,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-19 09:53:40,981 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 172 [2022-07-19 09:53:40,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:40,981 INFO L225 Difference]: With dead ends: 215 [2022-07-19 09:53:40,982 INFO L226 Difference]: Without dead ends: 159 [2022-07-19 09:53:40,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 09:53:40,983 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 50 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:40,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 112 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:53:40,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-19 09:53:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-07-19 09:53:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0194805194805194) internal successors, (157), 154 states have internal predecessors, (157), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 163 transitions. [2022-07-19 09:53:40,988 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 163 transitions. Word has length 172 [2022-07-19 09:53:40,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:40,989 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 163 transitions. [2022-07-19 09:53:40,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.358490566037736) internal successors, (125), 53 states have internal predecessors, (125), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:40,989 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 163 transitions. [2022-07-19 09:53:40,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-07-19 09:53:40,991 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:40,991 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:41,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 09:53:41,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 09:53:41,223 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:41,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:41,223 INFO L85 PathProgramCache]: Analyzing trace with hash -503255561, now seen corresponding path program 8 times [2022-07-19 09:53:41,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:41,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438362514] [2022-07-19 09:53:41,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:41,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:42,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-19 09:53:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:42,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-07-19 09:53:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:42,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2022-07-19 09:53:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-19 09:53:42,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:42,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438362514] [2022-07-19 09:53:42,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438362514] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:42,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73091803] [2022-07-19 09:53:42,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 09:53:42,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:42,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:42,284 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:42,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 09:53:42,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 09:53:42,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:42,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-19 09:53:42,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:42,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-19 09:53:42,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4399 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-19 09:53:44,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73091803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:44,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:44,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2022-07-19 09:53:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114841188] [2022-07-19 09:53:44,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:44,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-19 09:53:44,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:44,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-19 09:53:44,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-07-19 09:53:44,779 INFO L87 Difference]: Start difference. First operand 159 states and 163 transitions. Second operand has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:44,970 INFO L93 Difference]: Finished difference Result 319 states and 378 transitions. [2022-07-19 09:53:44,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-19 09:53:44,971 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 224 [2022-07-19 09:53:44,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:44,972 INFO L225 Difference]: With dead ends: 319 [2022-07-19 09:53:44,972 INFO L226 Difference]: Without dead ends: 263 [2022-07-19 09:53:44,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2022-07-19 09:53:44,975 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:44,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 178 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 09:53:44,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-19 09:53:44,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-07-19 09:53:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 267 transitions. [2022-07-19 09:53:44,981 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 267 transitions. Word has length 224 [2022-07-19 09:53:44,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:44,981 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 267 transitions. [2022-07-19 09:53:44,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.1809523809523808) internal successors, (229), 105 states have internal predecessors, (229), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 09:53:44,982 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 267 transitions. [2022-07-19 09:53:44,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2022-07-19 09:53:44,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:44,990 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:45,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 09:53:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 09:53:45,203 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash 57715551, now seen corresponding path program 9 times [2022-07-19 09:53:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:45,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410027571] [2022-07-19 09:53:45,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:45,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 207 [2022-07-19 09:53:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:48,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 242 [2022-07-19 09:53:48,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:48,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 291 [2022-07-19 09:53:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:48,105 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-07-19 09:53:48,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:48,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410027571] [2022-07-19 09:53:48,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410027571] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:48,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228422526] [2022-07-19 09:53:48,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 09:53:48,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:48,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:48,120 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:48,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 09:53:48,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-19 09:53:48,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:48,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 09:53:48,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 11417 trivial. 0 not checked. [2022-07-19 09:53:48,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 12303 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 12267 trivial. 0 not checked. [2022-07-19 09:53:49,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228422526] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:49,027 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:49,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 9, 9] total 119 [2022-07-19 09:53:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312257284] [2022-07-19 09:53:49,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:49,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-07-19 09:53:49,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-07-19 09:53:49,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2022-07-19 09:53:49,033 INFO L87 Difference]: Start difference. First operand 263 states and 267 transitions. Second operand has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:49,267 INFO L93 Difference]: Finished difference Result 338 states and 354 transitions. [2022-07-19 09:53:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-07-19 09:53:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 328 [2022-07-19 09:53:49,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:49,270 INFO L225 Difference]: With dead ends: 338 [2022-07-19 09:53:49,270 INFO L226 Difference]: Without dead ends: 282 [2022-07-19 09:53:49,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 648 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5579, Invalid=8463, Unknown=0, NotChecked=0, Total=14042 [2022-07-19 09:53:49,274 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:49,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 279 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:53:49,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-07-19 09:53:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2022-07-19 09:53:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0108695652173914) internal successors, (279), 276 states have internal predecessors, (279), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:49,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2022-07-19 09:53:49,281 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 328 [2022-07-19 09:53:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:49,282 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2022-07-19 09:53:49,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.19327731092437) internal successors, (261), 119 states have internal predecessors, (261), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:49,282 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2022-07-19 09:53:49,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-07-19 09:53:49,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:49,285 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 42, 42, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:49,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:49,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 09:53:49,517 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:49,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1915853137, now seen corresponding path program 10 times [2022-07-19 09:53:49,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:49,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662664135] [2022-07-19 09:53:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:49,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:52,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 209 [2022-07-19 09:53:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 244 [2022-07-19 09:53:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:52,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 309 [2022-07-19 09:53:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:52,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-07-19 09:53:52,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662664135] [2022-07-19 09:53:52,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662664135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:52,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538957667] [2022-07-19 09:53:52,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 09:53:52,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:52,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:53,008 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:53,010 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 09:53:53,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 09:53:53,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 09:53:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 09:53:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 09:53:53,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 1271 proven. 196 refuted. 0 times theorem prover too weak. 11201 trivial. 0 not checked. [2022-07-19 09:53:53,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 09:53:54,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12668 backedges. 424 proven. 620 refuted. 0 times theorem prover too weak. 11624 trivial. 0 not checked. [2022-07-19 09:53:54,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538957667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 09:53:54,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 09:53:54,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 17, 17] total 136 [2022-07-19 09:53:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779545805] [2022-07-19 09:53:54,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 09:53:54,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-07-19 09:53:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 09:53:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-07-19 09:53:54,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2022-07-19 09:53:54,586 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:54,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 09:53:54,864 INFO L93 Difference]: Finished difference Result 388 states and 415 transitions. [2022-07-19 09:53:54,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-07-19 09:53:54,864 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 346 [2022-07-19 09:53:54,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 09:53:54,865 INFO L225 Difference]: With dead ends: 388 [2022-07-19 09:53:54,866 INFO L226 Difference]: Without dead ends: 316 [2022-07-19 09:53:54,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 668 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=6060, Invalid=12300, Unknown=0, NotChecked=0, Total=18360 [2022-07-19 09:53:54,867 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 09:53:54,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 242 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 09:53:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-07-19 09:53:54,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2022-07-19 09:53:54,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0096774193548388) internal successors, (313), 310 states have internal predecessors, (313), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-19 09:53:54,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 319 transitions. [2022-07-19 09:53:54,874 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 319 transitions. Word has length 346 [2022-07-19 09:53:54,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 09:53:54,874 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 319 transitions. [2022-07-19 09:53:54,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 2.1691176470588234) internal successors, (295), 136 states have internal predecessors, (295), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 09:53:54,875 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 319 transitions. [2022-07-19 09:53:54,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-07-19 09:53:54,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 09:53:54,878 INFO L195 NwaCegarLoop]: trace histogram [104, 104, 90, 90, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 09:53:54,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 09:53:55,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 09:53:55,099 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 09:53:55,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 09:53:55,099 INFO L85 PathProgramCache]: Analyzing trace with hash 2050589619, now seen corresponding path program 11 times [2022-07-19 09:53:55,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 09:53:55,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399667991] [2022-07-19 09:53:55,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 09:53:55,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 09:53:55,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:57,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 211 [2022-07-19 09:53:57,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:57,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 278 [2022-07-19 09:53:57,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:57,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 375 [2022-07-19 09:53:57,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 09:53:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 19307 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 8491 trivial. 0 not checked. [2022-07-19 09:53:57,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 09:53:57,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399667991] [2022-07-19 09:53:57,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399667991] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 09:53:57,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633384952] [2022-07-19 09:53:57,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 09:53:57,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 09:53:57,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 09:53:57,594 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 09:53:57,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process