./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/EvenOdd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/recursive/EvenOdd01-1.c -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 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 17:40:31,606 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 17:40:31,608 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 17:40:31,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 17:40:31,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 17:40:31,644 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 17:40:31,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 17:40:31,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 17:40:31,648 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 17:40:31,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 17:40:31,652 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 17:40:31,654 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 17:40:31,654 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 17:40:31,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 17:40:31,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 17:40:31,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 17:40:31,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 17:40:31,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 17:40:31,661 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 17:40:31,673 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 17:40:31,675 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 17:40:31,676 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 17:40:31,677 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 17:40:31,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 17:40:31,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 17:40:31,683 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 17:40:31,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 17:40:31,684 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 17:40:31,685 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 17:40:31,685 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 17:40:31,686 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 17:40:31,686 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 17:40:31,687 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 17:40:31,688 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 17:40:31,688 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 17:40:31,689 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 17:40:31,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 17:40:31,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 17:40:31,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 17:40:31,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 17:40:31,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 17:40:31,692 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 17:40:31,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 17:40:31,715 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 17:40:31,716 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 17:40:31,716 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 17:40:31,716 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 17:40:31,717 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 17:40:31,717 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 17:40:31,718 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 17:40:31,718 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 17:40:31,718 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 17:40:31,719 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 17:40:31,719 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 17:40:31,719 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 17:40:31,719 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 17:40:31,719 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 17:40:31,720 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 17:40:31,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 17:40:31,720 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 17:40:31,720 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 17:40:31,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 17:40:31,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 17:40:31,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 17:40:31,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 17:40:31,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 17:40:31,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 17:40:31,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 17:40:31,721 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 17:40:31,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 17:40:31,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 17:40:31,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 17:40:31,722 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 17:40:31,722 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 17:40:31,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 17:40:31,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 17:40:31,723 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90982c548a5fc18702a6b533ab589c969b87a7efde724f265c9d2a7d593347dc [2022-07-22 17:40:31,913 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 17:40:31,929 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 17:40:31,931 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 17:40:31,932 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 17:40:31,932 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 17:40:31,933 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/EvenOdd01-1.c [2022-07-22 17:40:32,003 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911b7a48c/ee8b21a4f5464ae799f6c2a763b8e0ae/FLAGd077148da [2022-07-22 17:40:32,377 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 17:40:32,378 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/EvenOdd01-1.c [2022-07-22 17:40:32,382 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911b7a48c/ee8b21a4f5464ae799f6c2a763b8e0ae/FLAGd077148da [2022-07-22 17:40:32,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/911b7a48c/ee8b21a4f5464ae799f6c2a763b8e0ae [2022-07-22 17:40:32,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 17:40:32,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 17:40:32,402 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 17:40:32,402 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 17:40:32,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 17:40:32,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5256fa1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32, skipping insertion in model container [2022-07-22 17:40:32,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 17:40:32,419 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 17:40:32,536 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/recursive/EvenOdd01-1.c[975,988] [2022-07-22 17:40:32,540 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 17:40:32,545 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 17:40:32,554 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/recursive/EvenOdd01-1.c[975,988] [2022-07-22 17:40:32,555 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 17:40:32,562 INFO L208 MainTranslator]: Completed translation [2022-07-22 17:40:32,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32 WrapperNode [2022-07-22 17:40:32,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 17:40:32,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 17:40:32,563 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 17:40:32,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 17:40:32,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,572 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,580 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 27 [2022-07-22 17:40:32,581 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 17:40:32,581 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 17:40:32,581 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 17:40:32,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 17:40:32,585 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,586 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,588 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 17:40:32,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 17:40:32,591 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 17:40:32,591 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 17:40:32,592 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (1/1) ... [2022-07-22 17:40:32,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 17:40:32,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:32,612 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) [2022-07-22 17:40:32,617 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 [2022-07-22 17:40:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 17:40:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure isEven [2022-07-22 17:40:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure isEven [2022-07-22 17:40:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 17:40:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure isOdd [2022-07-22 17:40:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure isOdd [2022-07-22 17:40:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 17:40:32,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 17:40:32,693 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 17:40:32,694 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 17:40:32,845 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 17:40:32,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 17:40:32,850 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-22 17:40:32,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 05:40:32 BoogieIcfgContainer [2022-07-22 17:40:32,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 17:40:32,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 17:40:32,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 17:40:32,855 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 17:40:32,855 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 05:40:32" (1/3) ... [2022-07-22 17:40:32,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c95a9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 05:40:32, skipping insertion in model container [2022-07-22 17:40:32,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 05:40:32" (2/3) ... [2022-07-22 17:40:32,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c95a9f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 05:40:32, skipping insertion in model container [2022-07-22 17:40:32,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 05:40:32" (3/3) ... [2022-07-22 17:40:32,857 INFO L111 eAbstractionObserver]: Analyzing ICFG EvenOdd01-1.c [2022-07-22 17:40:32,874 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 17:40:32,883 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 17:40:32,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 17:40:32,952 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@768f7488, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@3b537aef [2022-07-22 17:40:32,952 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 17:40:32,968 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 17:40:32,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 17:40:32,973 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:32,974 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:32,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:32,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:32,978 INFO L85 PathProgramCache]: Analyzing trace with hash 951696528, now seen corresponding path program 1 times [2022-07-22 17:40:32,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:32,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115250501] [2022-07-22 17:40:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:32,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:33,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:33,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:40:33,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:33,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115250501] [2022-07-22 17:40:33,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115250501] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:40:33,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:40:33,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 17:40:33,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176566214] [2022-07-22 17:40:33,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:40:33,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 17:40:33,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:33,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 17:40:33,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 17:40:33,374 INFO L87 Difference]: Start difference. First operand has 25 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 17:40:33,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:33,458 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-07-22 17:40:33,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 17:40:33,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-07-22 17:40:33,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:33,468 INFO L225 Difference]: With dead ends: 37 [2022-07-22 17:40:33,469 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 17:40:33,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:40:33,474 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:33,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 97 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 17:40:33,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 17:40:33,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-22 17:40:33,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 17:40:33,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-22 17:40:33,504 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2022-07-22 17:40:33,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:33,505 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-22 17:40:33,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 17:40:33,505 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-22 17:40:33,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 17:40:33,506 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:33,506 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:33,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 17:40:33,508 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:33,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:33,509 INFO L85 PathProgramCache]: Analyzing trace with hash 186374926, now seen corresponding path program 1 times [2022-07-22 17:40:33,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:33,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898886682] [2022-07-22 17:40:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:33,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:33,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:33,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:40:33,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:33,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898886682] [2022-07-22 17:40:33,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898886682] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:40:33,795 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:40:33,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 17:40:33,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030850857] [2022-07-22 17:40:33,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:40:33,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 17:40:33,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:33,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 17:40:33,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 17:40:33,797 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 17:40:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:33,857 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-07-22 17:40:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 17:40:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-07-22 17:40:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:33,859 INFO L225 Difference]: With dead ends: 30 [2022-07-22 17:40:33,859 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 17:40:33,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-07-22 17:40:33,860 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:33,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 17:40:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 17:40:33,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-07-22 17:40:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 17:40:33,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-07-22 17:40:33,872 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2022-07-22 17:40:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:33,873 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-07-22 17:40:33,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 17:40:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-07-22 17:40:33,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 17:40:33,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:33,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:33,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 17:40:33,876 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:33,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:33,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1539294770, now seen corresponding path program 1 times [2022-07-22 17:40:33,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:33,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067743455] [2022-07-22 17:40:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:33,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:33,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:33,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:33,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:40:33,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:33,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067743455] [2022-07-22 17:40:33,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067743455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:40:33,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:40:33,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 17:40:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709750397] [2022-07-22 17:40:33,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:40:33,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 17:40:33,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 17:40:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 17:40:33,924 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 17:40:33,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:33,945 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2022-07-22 17:40:33,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 17:40:33,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-07-22 17:40:33,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:33,947 INFO L225 Difference]: With dead ends: 38 [2022-07-22 17:40:33,947 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 17:40:33,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 17:40:33,948 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:33,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 66 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 17:40:33,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 17:40:33,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-07-22 17:40:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 17:40:33,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2022-07-22 17:40:33,952 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 18 [2022-07-22 17:40:33,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:33,953 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2022-07-22 17:40:33,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 17:40:33,953 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2022-07-22 17:40:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 17:40:33,954 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:33,954 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:33,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 17:40:33,954 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:33,955 INFO L85 PathProgramCache]: Analyzing trace with hash -542404186, now seen corresponding path program 1 times [2022-07-22 17:40:33,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:33,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112243124] [2022-07-22 17:40:33,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:33,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 17:40:34,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:34,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112243124] [2022-07-22 17:40:34,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112243124] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:40:34,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:40:34,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 17:40:34,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913566844] [2022-07-22 17:40:34,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:40:34,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 17:40:34,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:34,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 17:40:34,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-07-22 17:40:34,093 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 17:40:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:34,202 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2022-07-22 17:40:34,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 17:40:34,203 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-22 17:40:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:34,211 INFO L225 Difference]: With dead ends: 33 [2022-07-22 17:40:34,211 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 17:40:34,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-07-22 17:40:34,219 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:34,221 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 83 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 17:40:34,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 17:40:34,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-07-22 17:40:34,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 17:40:34,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-07-22 17:40:34,227 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2022-07-22 17:40:34,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:34,228 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-07-22 17:40:34,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 17:40:34,229 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-07-22 17:40:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 17:40:34,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:34,231 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:34,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 17:40:34,231 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:34,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:34,232 INFO L85 PathProgramCache]: Analyzing trace with hash 928601386, now seen corresponding path program 1 times [2022-07-22 17:40:34,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:34,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889492425] [2022-07-22 17:40:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:34,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:34,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 17:40:34,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:34,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889492425] [2022-07-22 17:40:34,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889492425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 17:40:34,278 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 17:40:34,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 17:40:34,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426391260] [2022-07-22 17:40:34,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 17:40:34,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 17:40:34,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:34,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 17:40:34,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-22 17:40:34,279 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 17:40:34,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:34,301 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-07-22 17:40:34,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 17:40:34,302 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-07-22 17:40:34,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:34,307 INFO L225 Difference]: With dead ends: 39 [2022-07-22 17:40:34,307 INFO L226 Difference]: Without dead ends: 27 [2022-07-22 17:40:34,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-22 17:40:34,313 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:34,313 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 17:40:34,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-22 17:40:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-22 17:40:34,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.105263157894737) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 17:40:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-07-22 17:40:34,321 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 25 [2022-07-22 17:40:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:34,321 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-07-22 17:40:34,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.75) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-22 17:40:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-07-22 17:40:34,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 17:40:34,322 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:34,323 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:34,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 17:40:34,323 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:34,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:34,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1102972856, now seen corresponding path program 1 times [2022-07-22 17:40:34,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:34,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565685548] [2022-07-22 17:40:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:34,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:34,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 17:40:34,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:34,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565685548] [2022-07-22 17:40:34,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565685548] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:34,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695685112] [2022-07-22 17:40:34,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:34,552 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) [2022-07-22 17:40:34,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 17:40:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:34,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 17:40:34,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:34,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 17:40:34,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 17:40:35,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695685112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:35,195 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:35,196 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2022-07-22 17:40:35,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219191842] [2022-07-22 17:40:35,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:35,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 17:40:35,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:35,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 17:40:35,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2022-07-22 17:40:35,198 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 17:40:35,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:35,380 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2022-07-22 17:40:35,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 17:40:35,381 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 26 [2022-07-22 17:40:35,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:35,381 INFO L225 Difference]: With dead ends: 39 [2022-07-22 17:40:35,381 INFO L226 Difference]: Without dead ends: 35 [2022-07-22 17:40:35,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-07-22 17:40:35,382 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:35,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 121 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 17:40:35,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-22 17:40:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2022-07-22 17:40:35,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 2 states have call predecessors, (3), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-22 17:40:35,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-07-22 17:40:35,386 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2022-07-22 17:40:35,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:35,387 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-07-22 17:40:35,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 17:40:35,387 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-07-22 17:40:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 17:40:35,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:35,388 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:35,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:35,599 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,SelfDestructingSolverStorable5 [2022-07-22 17:40:35,599 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:35,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:35,600 INFO L85 PathProgramCache]: Analyzing trace with hash 550160832, now seen corresponding path program 1 times [2022-07-22 17:40:35,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:35,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589767747] [2022-07-22 17:40:35,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:35,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:35,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:35,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:35,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:35,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:35,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:35,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 17:40:35,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589767747] [2022-07-22 17:40:35,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589767747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:35,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733394130] [2022-07-22 17:40:35,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:35,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:35,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:35,772 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) [2022-07-22 17:40:35,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 17:40:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:35,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 17:40:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-22 17:40:35,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 17:40:36,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733394130] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:36,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:36,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 23 [2022-07-22 17:40:36,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505129694] [2022-07-22 17:40:36,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:36,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 17:40:36,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:36,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 17:40:36,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-07-22 17:40:36,492 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 17:40:36,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:36,740 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2022-07-22 17:40:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 17:40:36,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 33 [2022-07-22 17:40:36,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:36,742 INFO L225 Difference]: With dead ends: 45 [2022-07-22 17:40:36,742 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 17:40:36,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2022-07-22 17:40:36,743 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 28 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:36,744 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 148 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 17:40:36,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 17:40:36,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-07-22 17:40:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 2 states have call predecessors, (3), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2022-07-22 17:40:36,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-07-22 17:40:36,749 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 33 [2022-07-22 17:40:36,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:36,750 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-07-22 17:40:36,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 16 states have internal predecessors, (38), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 17:40:36,751 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-07-22 17:40:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-22 17:40:36,755 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:36,755 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:36,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:36,972 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,SelfDestructingSolverStorable6 [2022-07-22 17:40:36,973 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:36,973 INFO L85 PathProgramCache]: Analyzing trace with hash 780373730, now seen corresponding path program 2 times [2022-07-22 17:40:36,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:36,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889587120] [2022-07-22 17:40:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:37,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:37,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:37,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:37,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:37,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:37,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:37,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:37,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:37,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:37,231 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 17:40:37,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:37,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889587120] [2022-07-22 17:40:37,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889587120] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:37,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211463207] [2022-07-22 17:40:37,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:40:37,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:37,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:37,233 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) [2022-07-22 17:40:37,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 17:40:37,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:40:37,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:37,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 17:40:37,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-22 17:40:37,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:38,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 17:40:38,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211463207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:38,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:38,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 27 [2022-07-22 17:40:38,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848559052] [2022-07-22 17:40:38,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:38,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 17:40:38,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:38,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 17:40:38,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=620, Unknown=0, NotChecked=0, Total=702 [2022-07-22 17:40:38,041 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 27 states, 25 states have (on average 1.76) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2022-07-22 17:40:38,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:38,312 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2022-07-22 17:40:38,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 17:40:38,313 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) Word has length 40 [2022-07-22 17:40:38,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:38,315 INFO L225 Difference]: With dead ends: 51 [2022-07-22 17:40:38,315 INFO L226 Difference]: Without dead ends: 47 [2022-07-22 17:40:38,323 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1180, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 17:40:38,323 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 19 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:38,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 187 Invalid, 326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 17:40:38,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-07-22 17:40:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2022-07-22 17:40:38,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 2 states have call predecessors, (3), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2022-07-22 17:40:38,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-07-22 17:40:38,333 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 40 [2022-07-22 17:40:38,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:38,334 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-07-22 17:40:38,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 19 states have internal predecessors, (44), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (11), 8 states have call predecessors, (11), 9 states have call successors, (11) [2022-07-22 17:40:38,334 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-07-22 17:40:38,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 17:40:38,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:38,336 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:38,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:38,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:38,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash 866829402, now seen corresponding path program 2 times [2022-07-22 17:40:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:38,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350425434] [2022-07-22 17:40:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:38,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:38,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:38,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:38,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:38,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:38,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:38,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:38,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:38,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:38,852 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 17:40:38,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:38,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350425434] [2022-07-22 17:40:38,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350425434] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:38,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948669306] [2022-07-22 17:40:38,853 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:40:38,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:38,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:38,854 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) [2022-07-22 17:40:38,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 17:40:38,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:40:38,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:38,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 17:40:38,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:39,049 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 17:40:39,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 17:40:39,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948669306] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:39,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:39,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 21] total 30 [2022-07-22 17:40:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63344941] [2022-07-22 17:40:39,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:39,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-22 17:40:39,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-22 17:40:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2022-07-22 17:40:39,800 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 30 states, 28 states have (on average 1.75) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-22 17:40:40,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:40,141 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2022-07-22 17:40:40,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 17:40:40,141 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 1.75) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) Word has length 47 [2022-07-22 17:40:40,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:40,142 INFO L225 Difference]: With dead ends: 57 [2022-07-22 17:40:40,142 INFO L226 Difference]: Without dead ends: 53 [2022-07-22 17:40:40,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 88 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=1615, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 17:40:40,143 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:40,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 217 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 17:40:40,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-22 17:40:40,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-07-22 17:40:40,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 2 states have call predecessors, (3), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-22 17:40:40,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-07-22 17:40:40,146 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 47 [2022-07-22 17:40:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:40,146 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-07-22 17:40:40,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 1.75) internal successors, (49), 21 states have internal predecessors, (49), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (13), 9 states have call predecessors, (13), 10 states have call successors, (13) [2022-07-22 17:40:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-07-22 17:40:40,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-22 17:40:40,146 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:40,146 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:40,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:40,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:40,359 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:40,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:40,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1271721844, now seen corresponding path program 3 times [2022-07-22 17:40:40,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:40,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579859906] [2022-07-22 17:40:40,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:40,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:40,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:40,660 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 17:40:40,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579859906] [2022-07-22 17:40:40,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579859906] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:40,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807524151] [2022-07-22 17:40:40,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:40:40,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:40,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:40,662 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) [2022-07-22 17:40:40,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 17:40:40,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 17:40:40,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:40,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 17:40:40,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-22 17:40:40,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-22 17:40:42,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807524151] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:42,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:42,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 24] total 33 [2022-07-22 17:40:42,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904318913] [2022-07-22 17:40:42,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:42,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 17:40:42,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:42,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 17:40:42,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 17:40:42,069 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 33 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 23 states have internal predecessors, (54), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 17:40:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:42,502 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2022-07-22 17:40:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 17:40:42,503 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 23 states have internal predecessors, (54), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) Word has length 54 [2022-07-22 17:40:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:42,504 INFO L225 Difference]: With dead ends: 63 [2022-07-22 17:40:42,504 INFO L226 Difference]: Without dead ends: 59 [2022-07-22 17:40:42,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 17:40:42,505 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 27 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:42,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 292 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 17:40:42,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-22 17:40:42,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2022-07-22 17:40:42,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-22 17:40:42,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-07-22 17:40:42,509 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 54 [2022-07-22 17:40:42,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:42,509 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-07-22 17:40:42,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 1.7419354838709677) internal successors, (54), 23 states have internal predecessors, (54), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (15), 10 states have call predecessors, (15), 11 states have call successors, (15) [2022-07-22 17:40:42,509 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-07-22 17:40:42,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-22 17:40:42,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:42,510 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:42,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:42,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 17:40:42,727 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:42,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:42,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1194008948, now seen corresponding path program 3 times [2022-07-22 17:40:42,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:42,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161693584] [2022-07-22 17:40:42,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:42,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:42,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:42,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:42,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:42,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:42,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:42,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:42,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:42,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:43,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:43,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:43,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 17:40:43,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161693584] [2022-07-22 17:40:43,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161693584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:43,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080129911] [2022-07-22 17:40:43,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:40:43,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:43,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:43,072 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) [2022-07-22 17:40:43,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 17:40:43,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 17:40:43,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:43,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-22 17:40:43,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:43,281 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-22 17:40:43,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:44,480 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 17:40:44,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080129911] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:44,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:44,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 27] total 35 [2022-07-22 17:40:44,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909436986] [2022-07-22 17:40:44,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:44,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-22 17:40:44,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:44,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-22 17:40:44,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 17:40:44,483 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 24 states have internal predecessors, (58), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-22 17:40:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:44,964 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2022-07-22 17:40:44,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 17:40:44,964 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 24 states have internal predecessors, (58), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) Word has length 61 [2022-07-22 17:40:44,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:44,965 INFO L225 Difference]: With dead ends: 69 [2022-07-22 17:40:44,965 INFO L226 Difference]: Without dead ends: 65 [2022-07-22 17:40:44,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 117 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=2397, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 17:40:44,966 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 40 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:44,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 338 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 17:40:44,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-22 17:40:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 45. [2022-07-22 17:40:44,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 31 states have (on average 1.064516129032258) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 2 states have call predecessors, (3), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2022-07-22 17:40:44,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-07-22 17:40:44,970 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 61 [2022-07-22 17:40:44,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:44,970 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-07-22 17:40:44,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 24 states have internal predecessors, (58), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (17), 11 states have call predecessors, (17), 11 states have call successors, (17) [2022-07-22 17:40:44,971 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-07-22 17:40:44,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-22 17:40:44,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:44,971 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:44,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:45,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:45,189 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:45,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:45,189 INFO L85 PathProgramCache]: Analyzing trace with hash 809184438, now seen corresponding path program 4 times [2022-07-22 17:40:45,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:45,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534957860] [2022-07-22 17:40:45,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:45,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:45,597 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 17:40:45,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534957860] [2022-07-22 17:40:45,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534957860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:45,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107686763] [2022-07-22 17:40:45,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:40:45,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:45,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:45,599 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) [2022-07-22 17:40:45,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 17:40:45,645 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:40:45,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:45,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 17:40:45,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-22 17:40:45,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:47,433 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 17:40:47,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107686763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:47,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:47,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 30] total 39 [2022-07-22 17:40:47,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505629593] [2022-07-22 17:40:47,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:47,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 17:40:47,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:47,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 17:40:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 17:40:47,435 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 39 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 27 states have internal predecessors, (64), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-07-22 17:40:47,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:47,985 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2022-07-22 17:40:47,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 17:40:47,985 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 27 states have internal predecessors, (64), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) Word has length 68 [2022-07-22 17:40:47,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:47,986 INFO L225 Difference]: With dead ends: 75 [2022-07-22 17:40:47,986 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 17:40:47,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 128 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=286, Invalid=2906, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 17:40:47,987 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:47,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 363 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 17:40:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 17:40:47,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2022-07-22 17:40:47,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 2 states have call predecessors, (3), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-22 17:40:47,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-07-22 17:40:47,992 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 68 [2022-07-22 17:40:47,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:47,993 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-07-22 17:40:47,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 27 states have internal predecessors, (64), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (19), 12 states have call predecessors, (19), 13 states have call successors, (19) [2022-07-22 17:40:47,993 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-07-22 17:40:47,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 17:40:47,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:47,993 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:48,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:48,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:48,203 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:48,204 INFO L85 PathProgramCache]: Analyzing trace with hash -1512865522, now seen corresponding path program 4 times [2022-07-22 17:40:48,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:48,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810266018] [2022-07-22 17:40:48,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:48,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:48,744 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 17:40:48,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810266018] [2022-07-22 17:40:48,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810266018] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:48,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653292698] [2022-07-22 17:40:48,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:40:48,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:48,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:48,755 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) [2022-07-22 17:40:48,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 17:40:48,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:40:48,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:48,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 88 conjunts are in the unsatisfiable core [2022-07-22 17:40:48,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 17:40:49,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:50,277 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 17:40:50,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653292698] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:50,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:50,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 33] total 41 [2022-07-22 17:40:50,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937186545] [2022-07-22 17:40:50,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:50,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 17:40:50,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:50,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 17:40:50,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1508, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 17:40:50,278 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 41 states, 40 states have (on average 1.7) internal successors, (68), 28 states have internal predecessors, (68), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2022-07-22 17:40:50,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:50,911 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2022-07-22 17:40:50,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 17:40:50,912 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.7) internal successors, (68), 28 states have internal predecessors, (68), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) Word has length 75 [2022-07-22 17:40:50,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:50,912 INFO L225 Difference]: With dead ends: 81 [2022-07-22 17:40:50,912 INFO L226 Difference]: Without dead ends: 77 [2022-07-22 17:40:50,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 145 SyntacticMatches, 9 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=3450, Unknown=0, NotChecked=0, Total=3782 [2022-07-22 17:40:50,914 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:50,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 438 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 17:40:50,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-22 17:40:50,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2022-07-22 17:40:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 2 states have call predecessors, (3), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2022-07-22 17:40:50,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-07-22 17:40:50,917 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 75 [2022-07-22 17:40:50,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:50,917 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-07-22 17:40:50,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.7) internal successors, (68), 28 states have internal predecessors, (68), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (21), 13 states have call predecessors, (21), 13 states have call successors, (21) [2022-07-22 17:40:50,917 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-07-22 17:40:50,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-22 17:40:50,918 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:50,918 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:50,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:51,131 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,SelfDestructingSolverStorable12 [2022-07-22 17:40:51,132 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:51,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:51,132 INFO L85 PathProgramCache]: Analyzing trace with hash -1531804832, now seen corresponding path program 5 times [2022-07-22 17:40:51,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:51,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68453293] [2022-07-22 17:40:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:51,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:51,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:51,737 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-22 17:40:51,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:51,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68453293] [2022-07-22 17:40:51,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68453293] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:51,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822011434] [2022-07-22 17:40:51,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 17:40:51,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:51,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:51,739 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) [2022-07-22 17:40:51,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 17:40:51,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 17:40:51,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:51,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 96 conjunts are in the unsatisfiable core [2022-07-22 17:40:51,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:52,054 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-22 17:40:52,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:53,899 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-22 17:40:53,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822011434] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:53,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:53,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 36] total 45 [2022-07-22 17:40:53,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145354094] [2022-07-22 17:40:53,900 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:53,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 17:40:53,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:53,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 17:40:53,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1832, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 17:40:53,901 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 45 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 31 states have internal predecessors, (74), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2022-07-22 17:40:54,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:54,372 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2022-07-22 17:40:54,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 17:40:54,372 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 31 states have internal predecessors, (74), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) Word has length 82 [2022-07-22 17:40:54,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:54,373 INFO L225 Difference]: With dead ends: 87 [2022-07-22 17:40:54,373 INFO L226 Difference]: Without dead ends: 83 [2022-07-22 17:40:54,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=365, Invalid=4057, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 17:40:54,374 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 37 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:54,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 464 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 17:40:54,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-22 17:40:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2022-07-22 17:40:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2022-07-22 17:40:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-07-22 17:40:54,382 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 82 [2022-07-22 17:40:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:54,382 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-07-22 17:40:54,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 31 states have internal predecessors, (74), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (23), 14 states have call predecessors, (23), 15 states have call successors, (23) [2022-07-22 17:40:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-07-22 17:40:54,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-22 17:40:54,383 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:54,383 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:54,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:54,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 17:40:54,600 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:54,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:54,600 INFO L85 PathProgramCache]: Analyzing trace with hash -1881963736, now seen corresponding path program 5 times [2022-07-22 17:40:54,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:54,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131044203] [2022-07-22 17:40:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:54,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:54,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:55,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:55,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:55,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:55,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:55,133 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 17:40:55,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:55,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131044203] [2022-07-22 17:40:55,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131044203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:55,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306767835] [2022-07-22 17:40:55,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 17:40:55,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:55,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:55,135 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) [2022-07-22 17:40:55,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 17:40:55,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 17:40:55,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:55,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 104 conjunts are in the unsatisfiable core [2022-07-22 17:40:55,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 17:40:55,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:40:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 170 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 17:40:57,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306767835] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:40:57,327 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:40:57,327 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 39] total 47 [2022-07-22 17:40:57,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300009362] [2022-07-22 17:40:57,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:40:57,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 17:40:57,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:40:57,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 17:40:57,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=2008, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 17:40:57,328 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 32 states have internal predecessors, (78), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2022-07-22 17:40:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:40:58,126 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2022-07-22 17:40:58,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 17:40:58,126 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 32 states have internal predecessors, (78), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) Word has length 89 [2022-07-22 17:40:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:40:58,127 INFO L225 Difference]: With dead ends: 93 [2022-07-22 17:40:58,127 INFO L226 Difference]: Without dead ends: 89 [2022-07-22 17:40:58,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 172 SyntacticMatches, 12 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 671 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=417, Invalid=4695, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 17:40:58,129 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 44 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 17:40:58,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 479 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 17:40:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-22 17:40:58,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2022-07-22 17:40:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 2 states have call predecessors, (3), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2022-07-22 17:40:58,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-07-22 17:40:58,132 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 89 [2022-07-22 17:40:58,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:40:58,133 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-07-22 17:40:58,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 32 states have internal predecessors, (78), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (25), 15 states have call predecessors, (25), 15 states have call successors, (25) [2022-07-22 17:40:58,133 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-07-22 17:40:58,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-07-22 17:40:58,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:40:58,133 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:40:58,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 17:40:58,343 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,SelfDestructingSolverStorable14 [2022-07-22 17:40:58,343 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:40:58,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:40:58,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1649915018, now seen corresponding path program 6 times [2022-07-22 17:40:58,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:40:58,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451185375] [2022-07-22 17:40:58,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:40:58,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:40:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:59,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:40:59,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:40:59,061 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-22 17:40:59,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:40:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451185375] [2022-07-22 17:40:59,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451185375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:40:59,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805414429] [2022-07-22 17:40:59,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 17:40:59,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:40:59,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:40:59,066 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) [2022-07-22 17:40:59,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 17:40:59,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 17:40:59,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:40:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-22 17:40:59,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:40:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-22 17:40:59,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:02,123 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 17:41:02,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805414429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:02,124 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:02,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 42] total 51 [2022-07-22 17:41:02,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642848886] [2022-07-22 17:41:02,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:02,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-22 17:41:02,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:02,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-22 17:41:02,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2380, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 17:41:02,125 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 51 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 35 states have internal predecessors, (84), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2022-07-22 17:41:03,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:03,087 INFO L93 Difference]: Finished difference Result 99 states and 101 transitions. [2022-07-22 17:41:03,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 17:41:03,088 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 35 states have internal predecessors, (84), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) Word has length 96 [2022-07-22 17:41:03,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:03,089 INFO L225 Difference]: With dead ends: 99 [2022-07-22 17:41:03,089 INFO L226 Difference]: Without dead ends: 95 [2022-07-22 17:41:03,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 184 SyntacticMatches, 14 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=452, Invalid=5400, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 17:41:03,090 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 1203 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 1203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:03,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 650 Invalid, 1301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 1203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 17:41:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-22 17:41:03,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 60. [2022-07-22 17:41:03,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 2 states have call predecessors, (3), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2022-07-22 17:41:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-07-22 17:41:03,093 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 96 [2022-07-22 17:41:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:03,094 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-07-22 17:41:03,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 35 states have internal predecessors, (84), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (27), 16 states have call predecessors, (27), 17 states have call successors, (27) [2022-07-22 17:41:03,094 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-07-22 17:41:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 17:41:03,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:03,094 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:03,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:03,311 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,SelfDestructingSolverStorable15 [2022-07-22 17:41:03,311 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:03,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:03,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1794979902, now seen corresponding path program 6 times [2022-07-22 17:41:03,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:03,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592247606] [2022-07-22 17:41:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:03,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:03,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:03,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:04,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:04,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:04,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:04,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 17:41:04,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592247606] [2022-07-22 17:41:04,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592247606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:04,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986846354] [2022-07-22 17:41:04,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 17:41:04,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:04,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:04,202 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) [2022-07-22 17:41:04,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 17:41:04,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-22 17:41:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 120 conjunts are in the unsatisfiable core [2022-07-22 17:41:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:04,580 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-07-22 17:41:04,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:07,505 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 17:41:07,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986846354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:07,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:07,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 45] total 53 [2022-07-22 17:41:07,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333518722] [2022-07-22 17:41:07,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:07,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 17:41:07,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:07,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 17:41:07,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2581, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 17:41:07,507 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 53 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 36 states have internal predecessors, (88), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2022-07-22 17:41:08,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:08,562 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2022-07-22 17:41:08,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 17:41:08,563 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 36 states have internal predecessors, (88), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) Word has length 103 [2022-07-22 17:41:08,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:08,563 INFO L225 Difference]: With dead ends: 105 [2022-07-22 17:41:08,563 INFO L226 Difference]: Without dead ends: 101 [2022-07-22 17:41:08,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 201 SyntacticMatches, 13 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=509, Invalid=6133, Unknown=0, NotChecked=0, Total=6642 [2022-07-22 17:41:08,565 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 48 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:08,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 596 Invalid, 1232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 17:41:08,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-22 17:41:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2022-07-22 17:41:08,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 2 states have call predecessors, (3), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2022-07-22 17:41:08,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-07-22 17:41:08,575 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 103 [2022-07-22 17:41:08,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:08,575 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-07-22 17:41:08,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.6923076923076923) internal successors, (88), 36 states have internal predecessors, (88), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (29), 17 states have call predecessors, (29), 17 states have call successors, (29) [2022-07-22 17:41:08,576 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-07-22 17:41:08,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-22 17:41:08,576 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:08,576 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:08,596 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:08,796 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,SelfDestructingSolverStorable16 [2022-07-22 17:41:08,796 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:08,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:08,797 INFO L85 PathProgramCache]: Analyzing trace with hash 848388148, now seen corresponding path program 7 times [2022-07-22 17:41:08,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:08,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122545762] [2022-07-22 17:41:08,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:08,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:08,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:08,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:08,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:08,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:08,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-07-22 17:41:09,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:09,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122545762] [2022-07-22 17:41:09,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122545762] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:09,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820092782] [2022-07-22 17:41:09,614 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 17:41:09,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:09,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:09,616 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) [2022-07-22 17:41:09,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 17:41:09,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:09,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 128 conjunts are in the unsatisfiable core [2022-07-22 17:41:09,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:10,034 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-07-22 17:41:10,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:13,382 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-22 17:41:13,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820092782] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:13,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:13,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 48] total 57 [2022-07-22 17:41:13,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387195951] [2022-07-22 17:41:13,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:13,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 17:41:13,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:13,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 17:41:13,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3000, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 17:41:13,384 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2022-07-22 17:41:14,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:14,472 INFO L93 Difference]: Finished difference Result 111 states and 113 transitions. [2022-07-22 17:41:14,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 17:41:14,472 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) Word has length 110 [2022-07-22 17:41:14,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:14,473 INFO L225 Difference]: With dead ends: 111 [2022-07-22 17:41:14,473 INFO L226 Difference]: Without dead ends: 107 [2022-07-22 17:41:14,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 212 SyntacticMatches, 16 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=547, Invalid=6935, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 17:41:14,475 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 33 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1145 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:14,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 621 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1145 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 17:41:14,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-22 17:41:14,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 66. [2022-07-22 17:41:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 2 states have call predecessors, (3), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2022-07-22 17:41:14,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-07-22 17:41:14,478 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 110 [2022-07-22 17:41:14,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:14,478 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-07-22 17:41:14,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.709090909090909) internal successors, (94), 39 states have internal predecessors, (94), 19 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (31), 18 states have call predecessors, (31), 19 states have call successors, (31) [2022-07-22 17:41:14,478 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-07-22 17:41:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-07-22 17:41:14,479 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:14,479 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:14,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:14,692 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,SelfDestructingSolverStorable17 [2022-07-22 17:41:14,692 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:14,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:14,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1860234972, now seen corresponding path program 7 times [2022-07-22 17:41:14,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:14,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522444967] [2022-07-22 17:41:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:14,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:14,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:14,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:14,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:14,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:14,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:14,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:14,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:14,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:14,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:14,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:14,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:15,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-22 17:41:15,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:15,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522444967] [2022-07-22 17:41:15,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522444967] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:15,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011854614] [2022-07-22 17:41:15,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 17:41:15,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:15,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:15,516 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) [2022-07-22 17:41:15,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 17:41:15,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:15,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 136 conjunts are in the unsatisfiable core [2022-07-22 17:41:15,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-22 17:41:15,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:19,499 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 322 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-22 17:41:19,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011854614] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:19,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:19,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 51] total 59 [2022-07-22 17:41:19,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35133285] [2022-07-22 17:41:19,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:19,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-22 17:41:19,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:19,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-22 17:41:19,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3224, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 17:41:19,502 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 59 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 40 states have internal predecessors, (98), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2022-07-22 17:41:20,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:20,403 INFO L93 Difference]: Finished difference Result 117 states and 119 transitions. [2022-07-22 17:41:20,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 17:41:20,404 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 40 states have internal predecessors, (98), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) Word has length 117 [2022-07-22 17:41:20,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:20,406 INFO L225 Difference]: With dead ends: 117 [2022-07-22 17:41:20,406 INFO L226 Difference]: Without dead ends: 113 [2022-07-22 17:41:20,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 228 SyntacticMatches, 16 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=611, Invalid=7761, Unknown=0, NotChecked=0, Total=8372 [2022-07-22 17:41:20,408 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 36 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 788 SdHoareTripleChecker+Invalid, 1532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:20,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 788 Invalid, 1532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 17:41:20,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-22 17:41:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2022-07-22 17:41:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 2 states have call predecessors, (3), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2022-07-22 17:41:20,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-07-22 17:41:20,427 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 117 [2022-07-22 17:41:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:20,428 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-07-22 17:41:20,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.6896551724137931) internal successors, (98), 40 states have internal predecessors, (98), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (33), 19 states have call predecessors, (33), 19 states have call successors, (33) [2022-07-22 17:41:20,428 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-07-22 17:41:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-07-22 17:41:20,429 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:20,437 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:20,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:20,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:20,652 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:20,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:20,654 INFO L85 PathProgramCache]: Analyzing trace with hash 23995998, now seen corresponding path program 8 times [2022-07-22 17:41:20,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:20,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043036320] [2022-07-22 17:41:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:20,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:20,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:20,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:20,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:20,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:20,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:20,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:20,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:21,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-22 17:41:21,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043036320] [2022-07-22 17:41:21,698 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043036320] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:21,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848029840] [2022-07-22 17:41:21,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:41:21,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:21,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:21,699 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:41:21,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 17:41:21,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:41:21,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:21,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 144 conjunts are in the unsatisfiable core [2022-07-22 17:41:21,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2022-07-22 17:41:22,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:25,562 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 368 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-22 17:41:25,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848029840] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:25,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:25,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 54] total 63 [2022-07-22 17:41:25,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962435000] [2022-07-22 17:41:25,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:25,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-22 17:41:25,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:25,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-22 17:41:25,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=3692, Unknown=0, NotChecked=0, Total=3906 [2022-07-22 17:41:25,564 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 63 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 43 states have internal predecessors, (104), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2022-07-22 17:41:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:26,533 INFO L93 Difference]: Finished difference Result 123 states and 125 transitions. [2022-07-22 17:41:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 17:41:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 43 states have internal predecessors, (104), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) Word has length 124 [2022-07-22 17:41:26,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:26,539 INFO L225 Difference]: With dead ends: 123 [2022-07-22 17:41:26,539 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 17:41:26,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 240 SyntacticMatches, 18 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=650, Invalid=8662, Unknown=0, NotChecked=0, Total=9312 [2022-07-22 17:41:26,544 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:26,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 950 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 17:41:26,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 17:41:26,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 72. [2022-07-22 17:41:26,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 2 states have call predecessors, (3), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2022-07-22 17:41:26,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-07-22 17:41:26,558 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 124 [2022-07-22 17:41:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:26,558 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-07-22 17:41:26,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 43 states have internal predecessors, (104), 21 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (35), 20 states have call predecessors, (35), 21 states have call successors, (35) [2022-07-22 17:41:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-07-22 17:41:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 17:41:26,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:26,559 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:26,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-22 17:41:26,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:26,772 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1519753334, now seen corresponding path program 8 times [2022-07-22 17:41:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:26,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123357766] [2022-07-22 17:41:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:26,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:26,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:26,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:26,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:26,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:26,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:26,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:27,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:27,753 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-07-22 17:41:27,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:27,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123357766] [2022-07-22 17:41:27,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123357766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:27,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314457474] [2022-07-22 17:41:27,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:41:27,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:27,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:27,764 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:41:27,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 17:41:27,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:41:27,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 152 conjunts are in the unsatisfiable core [2022-07-22 17:41:27,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-07-22 17:41:28,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-07-22 17:41:32,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314457474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:32,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:32,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 57] total 65 [2022-07-22 17:41:32,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402980502] [2022-07-22 17:41:32,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:32,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 17:41:32,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:32,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 17:41:32,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=3941, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 17:41:32,831 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 65 states, 64 states have (on average 1.6875) internal successors, (108), 44 states have internal predecessors, (108), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2022-07-22 17:41:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:34,104 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2022-07-22 17:41:34,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 17:41:34,104 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.6875) internal successors, (108), 44 states have internal predecessors, (108), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) Word has length 131 [2022-07-22 17:41:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:34,109 INFO L225 Difference]: With dead ends: 129 [2022-07-22 17:41:34,109 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 17:41:34,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 257 SyntacticMatches, 17 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=719, Invalid=9583, Unknown=0, NotChecked=0, Total=10302 [2022-07-22 17:41:34,129 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 64 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 1669 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 824 SdHoareTripleChecker+Invalid, 1711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:34,129 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 824 Invalid, 1711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 17:41:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 17:41:34,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 75. [2022-07-22 17:41:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 2 states have call predecessors, (3), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2022-07-22 17:41:34,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-07-22 17:41:34,132 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 131 [2022-07-22 17:41:34,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:34,133 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-07-22 17:41:34,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.6875) internal successors, (108), 44 states have internal predecessors, (108), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (37), 21 states have call predecessors, (37), 21 states have call successors, (37) [2022-07-22 17:41:34,133 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-07-22 17:41:34,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-07-22 17:41:34,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:34,134 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:34,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:34,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:34,336 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash 128231176, now seen corresponding path program 9 times [2022-07-22 17:41:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:34,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893801477] [2022-07-22 17:41:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:34,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:34,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:34,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:35,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:35,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:35,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-07-22 17:41:35,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893801477] [2022-07-22 17:41:35,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893801477] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980247772] [2022-07-22 17:41:35,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:41:35,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:35,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:35,462 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:41:35,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 17:41:35,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-22 17:41:35,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:35,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 160 conjunts are in the unsatisfiable core [2022-07-22 17:41:35,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:35,988 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-07-22 17:41:35,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:39,420 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 468 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-22 17:41:39,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980247772] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:39,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:39,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 60] total 69 [2022-07-22 17:41:39,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655313050] [2022-07-22 17:41:39,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:39,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 17:41:39,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:39,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 17:41:39,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4456, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 17:41:39,422 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 47 states have internal predecessors, (114), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2022-07-22 17:41:40,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:40,601 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2022-07-22 17:41:40,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-22 17:41:40,608 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 47 states have internal predecessors, (114), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) Word has length 138 [2022-07-22 17:41:40,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:40,610 INFO L225 Difference]: With dead ends: 135 [2022-07-22 17:41:40,610 INFO L226 Difference]: Without dead ends: 131 [2022-07-22 17:41:40,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 268 SyntacticMatches, 20 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=761, Invalid=10581, Unknown=0, NotChecked=0, Total=11342 [2022-07-22 17:41:40,612 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 1062 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 2177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:40,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 1093 Invalid, 2177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 17:41:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-22 17:41:40,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 78. [2022-07-22 17:41:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 2 states have call predecessors, (3), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2022-07-22 17:41:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-07-22 17:41:40,620 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 138 [2022-07-22 17:41:40,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:40,621 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-07-22 17:41:40,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 1.7014925373134329) internal successors, (114), 47 states have internal predecessors, (114), 23 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (39), 22 states have call predecessors, (39), 23 states have call successors, (39) [2022-07-22 17:41:40,621 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-07-22 17:41:40,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-07-22 17:41:40,622 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:40,622 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:40,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 17:41:40,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:40,835 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:40,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:40,836 INFO L85 PathProgramCache]: Analyzing trace with hash -219126640, now seen corresponding path program 9 times [2022-07-22 17:41:40,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:40,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581644176] [2022-07-22 17:41:40,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:40,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:40,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:40,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:40,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:40,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:40,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-07-22 17:41:41,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:41,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581644176] [2022-07-22 17:41:41,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581644176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:41,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898672127] [2022-07-22 17:41:41,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:41:41,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:41,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:41,987 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:41:41,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 17:41:42,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-22 17:41:42,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:42,146 WARN L261 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 168 conjunts are in the unsatisfiable core [2022-07-22 17:41:42,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:42,528 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-07-22 17:41:42,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 0 proven. 522 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2022-07-22 17:41:47,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898672127] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:47,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:47,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 63] total 72 [2022-07-22 17:41:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614401951] [2022-07-22 17:41:47,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:47,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 17:41:47,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:47,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 17:41:47,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=4866, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 17:41:47,875 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 72 states, 70 states have (on average 1.7) internal successors, (119), 49 states have internal predecessors, (119), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) [2022-07-22 17:41:49,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:49,732 INFO L93 Difference]: Finished difference Result 141 states and 143 transitions. [2022-07-22 17:41:49,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-22 17:41:49,732 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 1.7) internal successors, (119), 49 states have internal predecessors, (119), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) Word has length 145 [2022-07-22 17:41:49,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:49,733 INFO L225 Difference]: With dead ends: 141 [2022-07-22 17:41:49,733 INFO L226 Difference]: Without dead ends: 137 [2022-07-22 17:41:49,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 284 SyntacticMatches, 19 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1677 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=842, Invalid=11814, Unknown=0, NotChecked=0, Total=12656 [2022-07-22 17:41:49,734 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 2146 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1122 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:49,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1122 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2146 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 17:41:49,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-07-22 17:41:49,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 81. [2022-07-22 17:41:49,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 2 states have call predecessors, (3), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2022-07-22 17:41:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-07-22 17:41:49,736 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 145 [2022-07-22 17:41:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:49,737 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-07-22 17:41:49,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 1.7) internal successors, (119), 49 states have internal predecessors, (119), 24 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (41), 23 states have call predecessors, (41), 24 states have call successors, (41) [2022-07-22 17:41:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-07-22 17:41:49,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-22 17:41:49,737 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:49,738 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:41:49,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-07-22 17:41:49,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:49,947 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:41:49,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:41:49,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1955824178, now seen corresponding path program 10 times [2022-07-22 17:41:49,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:41:49,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031202928] [2022-07-22 17:41:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:41:49,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:41:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:50,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:51,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:51,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:51,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:51,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:41:51,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:41:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-07-22 17:41:51,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:41:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031202928] [2022-07-22 17:41:51,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031202928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:41:51,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862746834] [2022-07-22 17:41:51,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:41:51,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:41:51,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:41:51,260 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:41:51,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 17:41:51,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:41:51,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:41:51,447 WARN L261 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 176 conjunts are in the unsatisfiable core [2022-07-22 17:41:51,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:41:51,866 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-07-22 17:41:51,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:41:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 0 proven. 580 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-22 17:41:57,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862746834] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:41:57,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:41:57,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 66] total 75 [2022-07-22 17:41:57,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154738681] [2022-07-22 17:41:57,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:41:57,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-22 17:41:57,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:41:57,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-22 17:41:57,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=5292, Unknown=0, NotChecked=0, Total=5550 [2022-07-22 17:41:57,965 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 75 states, 73 states have (on average 1.6986301369863013) internal successors, (124), 51 states have internal predecessors, (124), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2022-07-22 17:41:59,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:41:59,979 INFO L93 Difference]: Finished difference Result 147 states and 149 transitions. [2022-07-22 17:41:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 17:41:59,980 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 73 states have (on average 1.6986301369863013) internal successors, (124), 51 states have internal predecessors, (124), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) Word has length 152 [2022-07-22 17:41:59,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:41:59,981 INFO L225 Difference]: With dead ends: 147 [2022-07-22 17:41:59,981 INFO L226 Difference]: Without dead ends: 143 [2022-07-22 17:41:59,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 296 SyntacticMatches, 22 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=880, Invalid=12692, Unknown=0, NotChecked=0, Total=13572 [2022-07-22 17:41:59,982 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 58 mSDsluCounter, 1198 mSDsCounter, 0 mSdLazyCounter, 2375 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1231 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 2375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:41:59,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1231 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 2375 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:41:59,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-07-22 17:41:59,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 84. [2022-07-22 17:41:59,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2022-07-22 17:41:59,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-07-22 17:41:59,985 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 152 [2022-07-22 17:41:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:41:59,986 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-07-22 17:41:59,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 73 states have (on average 1.6986301369863013) internal successors, (124), 51 states have internal predecessors, (124), 25 states have call successors, (25), 1 states have call predecessors, (25), 22 states have return successors, (43), 24 states have call predecessors, (43), 25 states have call successors, (43) [2022-07-22 17:41:59,986 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-07-22 17:41:59,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-22 17:41:59,986 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:41:59,987 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:42:00,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:00,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:00,187 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:00,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:00,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1972833494, now seen corresponding path program 10 times [2022-07-22 17:42:00,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:00,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322572167] [2022-07-22 17:42:00,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:00,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:00,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:00,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:01,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:01,539 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-07-22 17:42:01,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:01,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322572167] [2022-07-22 17:42:01,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322572167] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:01,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531602602] [2022-07-22 17:42:01,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:42:01,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:01,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:01,541 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:42:01,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 17:42:01,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:42:01,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:01,747 WARN L261 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 184 conjunts are in the unsatisfiable core [2022-07-22 17:42:01,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:02,079 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 320 refuted. 0 times theorem prover too weak. 430 trivial. 0 not checked. [2022-07-22 17:42:02,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:06,279 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 0 proven. 640 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-07-22 17:42:06,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531602602] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:42:06,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:42:06,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 69] total 77 [2022-07-22 17:42:06,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156514074] [2022-07-22 17:42:06,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:06,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-22 17:42:06,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-22 17:42:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5588, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 17:42:06,285 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 77 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 52 states have internal predecessors, (128), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2022-07-22 17:42:07,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:07,640 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2022-07-22 17:42:07,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-22 17:42:07,641 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 52 states have internal predecessors, (128), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) Word has length 159 [2022-07-22 17:42:07,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:07,643 INFO L225 Difference]: With dead ends: 153 [2022-07-22 17:42:07,643 INFO L226 Difference]: Without dead ends: 149 [2022-07-22 17:42:07,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 313 SyntacticMatches, 21 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1796 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=962, Invalid=13800, Unknown=0, NotChecked=0, Total=14762 [2022-07-22 17:42:07,645 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 60 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2266 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1168 SdHoareTripleChecker+Invalid, 2304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 2266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:07,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1168 Invalid, 2304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 2266 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 17:42:07,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-07-22 17:42:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 87. [2022-07-22 17:42:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 2 states have call predecessors, (3), 24 states have return successors, (25), 24 states have call predecessors, (25), 3 states have call successors, (25) [2022-07-22 17:42:07,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-07-22 17:42:07,670 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 159 [2022-07-22 17:42:07,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:07,671 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-07-22 17:42:07,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.6842105263157894) internal successors, (128), 52 states have internal predecessors, (128), 25 states have call successors, (25), 1 states have call predecessors, (25), 23 states have return successors, (45), 25 states have call predecessors, (45), 25 states have call successors, (45) [2022-07-22 17:42:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-07-22 17:42:07,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-22 17:42:07,679 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:07,679 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:42:07,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:07,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-22 17:42:07,895 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:07,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:07,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1740548132, now seen corresponding path program 11 times [2022-07-22 17:42:07,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:07,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611844327] [2022-07-22 17:42:07,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:07,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:07,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:08,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:08,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:09,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:09,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:09,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:09,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:09,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:09,401 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-22 17:42:09,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:09,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611844327] [2022-07-22 17:42:09,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611844327] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:09,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660285767] [2022-07-22 17:42:09,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 17:42:09,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:09,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:09,402 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:42:09,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 17:42:09,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-22 17:42:09,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:09,647 WARN L261 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 192 conjunts are in the unsatisfiable core [2022-07-22 17:42:09,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 473 trivial. 0 not checked. [2022-07-22 17:42:10,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 704 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-22 17:42:14,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660285767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:42:14,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:42:14,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 72] total 81 [2022-07-22 17:42:14,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360773793] [2022-07-22 17:42:14,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:14,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-22 17:42:14,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:14,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-22 17:42:14,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=6200, Unknown=0, NotChecked=0, Total=6480 [2022-07-22 17:42:14,850 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2022-07-22 17:42:16,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:16,707 INFO L93 Difference]: Finished difference Result 159 states and 161 transitions. [2022-07-22 17:42:16,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 17:42:16,708 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) Word has length 166 [2022-07-22 17:42:16,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:16,708 INFO L225 Difference]: With dead ends: 159 [2022-07-22 17:42:16,708 INFO L226 Difference]: Without dead ends: 155 [2022-07-22 17:42:16,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 324 SyntacticMatches, 24 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1007, Invalid=14995, Unknown=0, NotChecked=0, Total=16002 [2022-07-22 17:42:16,710 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 73 mSDsluCounter, 1389 mSDsCounter, 0 mSdLazyCounter, 2737 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 2987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 2737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:16,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 1424 Invalid, 2987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 2737 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-22 17:42:16,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-07-22 17:42:16,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 90. [2022-07-22 17:42:16,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 2 states have call predecessors, (3), 25 states have return successors, (26), 25 states have call predecessors, (26), 3 states have call successors, (26) [2022-07-22 17:42:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-07-22 17:42:16,713 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 166 [2022-07-22 17:42:16,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:16,713 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-07-22 17:42:16,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 79 states have (on average 1.6962025316455696) internal successors, (134), 55 states have internal predecessors, (134), 27 states have call successors, (27), 1 states have call predecessors, (27), 24 states have return successors, (47), 26 states have call predecessors, (47), 27 states have call successors, (47) [2022-07-22 17:42:16,713 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-07-22 17:42:16,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-22 17:42:16,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:16,714 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:42:16,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:16,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 17:42:16,936 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 85910596, now seen corresponding path program 11 times [2022-07-22 17:42:16,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:16,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434183698] [2022-07-22 17:42:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:17,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:17,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:18,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:18,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:18,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:18,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:18,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:18,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-07-22 17:42:18,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:18,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434183698] [2022-07-22 17:42:18,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434183698] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:18,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321574357] [2022-07-22 17:42:18,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 17:42:18,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:18,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:18,496 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:42:18,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 17:42:18,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-22 17:42:18,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:18,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 200 conjunts are in the unsatisfiable core [2022-07-22 17:42:18,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 385 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-07-22 17:42:19,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 17:42:25,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321574357] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:42:25,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:42:25,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 75] total 83 [2022-07-22 17:42:25,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605401041] [2022-07-22 17:42:25,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:25,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-22 17:42:25,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:25,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-22 17:42:25,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=6521, Unknown=0, NotChecked=0, Total=6806 [2022-07-22 17:42:25,887 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 83 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 56 states have internal predecessors, (138), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2022-07-22 17:42:27,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:27,599 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2022-07-22 17:42:27,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 17:42:27,600 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 56 states have internal predecessors, (138), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) Word has length 173 [2022-07-22 17:42:27,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:27,601 INFO L225 Difference]: With dead ends: 165 [2022-07-22 17:42:27,602 INFO L226 Difference]: Without dead ends: 161 [2022-07-22 17:42:27,602 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 341 SyntacticMatches, 23 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2051 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1094, Invalid=16198, Unknown=0, NotChecked=0, Total=17292 [2022-07-22 17:42:27,603 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 1556 mSDsCounter, 0 mSdLazyCounter, 3061 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 1592 SdHoareTripleChecker+Invalid, 3087 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:27,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 1592 Invalid, 3087 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3061 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 17:42:27,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-07-22 17:42:27,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 93. [2022-07-22 17:42:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 2 states have call predecessors, (3), 26 states have return successors, (27), 26 states have call predecessors, (27), 3 states have call successors, (27) [2022-07-22 17:42:27,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-07-22 17:42:27,608 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 173 [2022-07-22 17:42:27,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:27,608 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-07-22 17:42:27,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.6829268292682926) internal successors, (138), 56 states have internal predecessors, (138), 27 states have call successors, (27), 1 states have call predecessors, (27), 25 states have return successors, (49), 27 states have call predecessors, (49), 27 states have call successors, (49) [2022-07-22 17:42:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-07-22 17:42:27,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-22 17:42:27,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:27,611 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:42:27,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:27,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 17:42:27,829 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:27,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:27,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1923299322, now seen corresponding path program 12 times [2022-07-22 17:42:27,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:27,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211333211] [2022-07-22 17:42:27,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:27,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:27,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:27,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:27,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:28,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:28,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:29,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:29,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:29,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:29,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:29,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-07-22 17:42:29,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:29,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211333211] [2022-07-22 17:42:29,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211333211] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:29,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857272120] [2022-07-22 17:42:29,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 17:42:29,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:29,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:29,432 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:42:29,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 17:42:29,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-22 17:42:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:29,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 208 conjunts are in the unsatisfiable core [2022-07-22 17:42:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-07-22 17:42:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:42:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 984 backedges. 0 proven. 840 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 17:42:36,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857272120] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:42:36,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:42:36,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 78] total 87 [2022-07-22 17:42:36,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803348594] [2022-07-22 17:42:36,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:42:36,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-07-22 17:42:36,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:42:36,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-07-22 17:42:36,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=7180, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 17:42:36,662 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 87 states, 85 states have (on average 1.6941176470588235) internal successors, (144), 59 states have internal predecessors, (144), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2022-07-22 17:42:38,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:42:38,671 INFO L93 Difference]: Finished difference Result 171 states and 173 transitions. [2022-07-22 17:42:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-22 17:42:38,671 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 85 states have (on average 1.6941176470588235) internal successors, (144), 59 states have internal predecessors, (144), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) Word has length 180 [2022-07-22 17:42:38,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:42:38,672 INFO L225 Difference]: With dead ends: 171 [2022-07-22 17:42:38,672 INFO L226 Difference]: Without dead ends: 167 [2022-07-22 17:42:38,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 513 GetRequests, 352 SyntacticMatches, 26 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2518 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1142, Invalid=17490, Unknown=0, NotChecked=0, Total=18632 [2022-07-22 17:42:38,674 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 21 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 3132 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1621 SdHoareTripleChecker+Invalid, 3210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 3132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 17:42:38,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1621 Invalid, 3210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 3132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-22 17:42:38,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-22 17:42:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 96. [2022-07-22 17:42:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 2 states have call predecessors, (3), 27 states have return successors, (28), 27 states have call predecessors, (28), 3 states have call successors, (28) [2022-07-22 17:42:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-07-22 17:42:38,684 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 180 [2022-07-22 17:42:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:42:38,685 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-07-22 17:42:38,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 85 states have (on average 1.6941176470588235) internal successors, (144), 59 states have internal predecessors, (144), 29 states have call successors, (29), 1 states have call predecessors, (29), 26 states have return successors, (51), 28 states have call predecessors, (51), 29 states have call successors, (51) [2022-07-22 17:42:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-07-22 17:42:38,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-22 17:42:38,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:42:38,686 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:42:38,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-22 17:42:38,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:38,904 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:42:38,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:42:38,904 INFO L85 PathProgramCache]: Analyzing trace with hash 853137374, now seen corresponding path program 12 times [2022-07-22 17:42:38,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:42:38,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706035081] [2022-07-22 17:42:38,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:42:38,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:42:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:38,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:39,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:42:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:42:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-22 17:42:40,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:42:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706035081] [2022-07-22 17:42:40,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706035081] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:42:40,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99572409] [2022-07-22 17:42:40,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 17:42:40,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:42:40,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:42:40,726 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:42:40,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 17:42:41,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-07-22 17:42:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:42:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 164 conjunts are in the unsatisfiable core [2022-07-22 17:42:41,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:42:43,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 456 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-07-22 17:42:43,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:43:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1068 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-07-22 17:43:24,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99572409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:43:24,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:43:24,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58, 81] total 190 [2022-07-22 17:43:24,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057577863] [2022-07-22 17:43:24,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:43:24,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-07-22 17:43:24,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:43:24,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-07-22 17:43:24,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=35126, Unknown=0, NotChecked=0, Total=35910 [2022-07-22 17:43:24,573 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 190 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 112 states have internal predecessors, (250), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2022-07-22 17:43:29,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:43:29,293 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2022-07-22 17:43:29,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 17:43:29,294 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 112 states have internal predecessors, (250), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) Word has length 187 [2022-07-22 17:43:29,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:43:29,295 INFO L225 Difference]: With dead ends: 177 [2022-07-22 17:43:29,295 INFO L226 Difference]: Without dead ends: 173 [2022-07-22 17:43:29,297 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11630 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=1789, Invalid=57017, Unknown=0, NotChecked=0, Total=58806 [2022-07-22 17:43:29,298 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 42 mSDsluCounter, 3072 mSDsCounter, 0 mSdLazyCounter, 6208 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 3110 SdHoareTripleChecker+Invalid, 6231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 6208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:43:29,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 3110 Invalid, 6231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 6208 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-22 17:43:29,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-22 17:43:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 99. [2022-07-22 17:43:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 2 states have call predecessors, (3), 28 states have return successors, (29), 28 states have call predecessors, (29), 3 states have call successors, (29) [2022-07-22 17:43:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-07-22 17:43:29,302 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 187 [2022-07-22 17:43:29,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:43:29,302 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-07-22 17:43:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 1.3227513227513228) internal successors, (250), 112 states have internal predecessors, (250), 29 states have call successors, (29), 1 states have call predecessors, (29), 78 states have return successors, (78), 78 states have call predecessors, (78), 29 states have call successors, (78) [2022-07-22 17:43:29,302 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-07-22 17:43:29,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-07-22 17:43:29,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:43:29,303 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:43:29,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-22 17:43:29,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 17:43:29,519 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:43:29,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:43:29,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1664905904, now seen corresponding path program 13 times [2022-07-22 17:43:29,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:43:29,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201903032] [2022-07-22 17:43:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:43:29,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:43:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:29,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:30,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:31,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:31,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:31,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:31,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2022-07-22 17:43:31,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:43:31,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201903032] [2022-07-22 17:43:31,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201903032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:43:31,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936614133] [2022-07-22 17:43:31,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 17:43:31,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:43:31,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:43:31,347 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:43:31,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 17:43:32,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:32,539 WARN L261 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 224 conjunts are in the unsatisfiable core [2022-07-22 17:43:32,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:43:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2022-07-22 17:43:33,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:43:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1157 backedges. 0 proven. 988 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-22 17:43:39,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936614133] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:43:39,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:43:39,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 84] total 93 [2022-07-22 17:43:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437829649] [2022-07-22 17:43:39,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:43:39,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-07-22 17:43:39,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:43:39,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-07-22 17:43:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=8232, Unknown=0, NotChecked=0, Total=8556 [2022-07-22 17:43:39,170 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 93 states, 91 states have (on average 1.6923076923076923) internal successors, (154), 63 states have internal predecessors, (154), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2022-07-22 17:43:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:43:41,494 INFO L93 Difference]: Finished difference Result 183 states and 185 transitions. [2022-07-22 17:43:41,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 17:43:41,495 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 91 states have (on average 1.6923076923076923) internal successors, (154), 63 states have internal predecessors, (154), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) Word has length 194 [2022-07-22 17:43:41,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:43:41,496 INFO L225 Difference]: With dead ends: 183 [2022-07-22 17:43:41,496 INFO L226 Difference]: Without dead ends: 179 [2022-07-22 17:43:41,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 380 SyntacticMatches, 28 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2880 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1285, Invalid=20177, Unknown=0, NotChecked=0, Total=21462 [2022-07-22 17:43:41,500 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 14 mSDsluCounter, 1970 mSDsCounter, 0 mSdLazyCounter, 3758 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 2009 SdHoareTripleChecker+Invalid, 3813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:43:41,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 2009 Invalid, 3813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3758 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:43:41,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-22 17:43:41,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 102. [2022-07-22 17:43:41,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 2 states have call predecessors, (3), 29 states have return successors, (30), 29 states have call predecessors, (30), 3 states have call successors, (30) [2022-07-22 17:43:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-07-22 17:43:41,513 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 194 [2022-07-22 17:43:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:43:41,514 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-07-22 17:43:41,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 91 states have (on average 1.6923076923076923) internal successors, (154), 63 states have internal predecessors, (154), 31 states have call successors, (31), 1 states have call predecessors, (31), 28 states have return successors, (55), 30 states have call predecessors, (55), 31 states have call successors, (55) [2022-07-22 17:43:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-07-22 17:43:41,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-07-22 17:43:41,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:43:41,515 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:43:41,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-22 17:43:41,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:43:41,736 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:43:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:43:41,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1458999816, now seen corresponding path program 13 times [2022-07-22 17:43:41,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:43:41,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781251846] [2022-07-22 17:43:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:43:41,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:43:41,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:41,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:41,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:41,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:41,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:41,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:42,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:43,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:43,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-22 17:43:43,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:43:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781251846] [2022-07-22 17:43:43,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781251846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:43:43,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320515273] [2022-07-22 17:43:43,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 17:43:43,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:43:43,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:43:43,691 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:43:43,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 17:43:44,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:44,801 WARN L261 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 232 conjunts are in the unsatisfiable core [2022-07-22 17:43:44,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:43:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 533 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-22 17:43:45,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:43:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 0 proven. 1066 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-07-22 17:43:51,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320515273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:43:51,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:43:51,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 87] total 95 [2022-07-22 17:43:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944162301] [2022-07-22 17:43:51,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:43:51,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-07-22 17:43:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:43:51,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-07-22 17:43:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=8600, Unknown=0, NotChecked=0, Total=8930 [2022-07-22 17:43:51,339 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 64 states have internal predecessors, (158), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) [2022-07-22 17:43:53,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:43:53,492 INFO L93 Difference]: Finished difference Result 189 states and 191 transitions. [2022-07-22 17:43:53,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-07-22 17:43:53,492 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 64 states have internal predecessors, (158), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) Word has length 201 [2022-07-22 17:43:53,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:43:53,493 INFO L225 Difference]: With dead ends: 189 [2022-07-22 17:43:53,493 INFO L226 Difference]: Without dead ends: 185 [2022-07-22 17:43:53,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 396 SyntacticMatches, 28 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2903 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1385, Invalid=21567, Unknown=0, NotChecked=0, Total=22952 [2022-07-22 17:43:53,496 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 48 mSDsluCounter, 2050 mSDsCounter, 0 mSdLazyCounter, 4065 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 2090 SdHoareTripleChecker+Invalid, 4101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 4065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:43:53,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 2090 Invalid, 4101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 4065 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:43:53,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-07-22 17:43:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 105. [2022-07-22 17:43:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 2 states have call predecessors, (3), 30 states have return successors, (31), 30 states have call predecessors, (31), 3 states have call successors, (31) [2022-07-22 17:43:53,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-07-22 17:43:53,499 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 201 [2022-07-22 17:43:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:43:53,499 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-07-22 17:43:53,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.6808510638297873) internal successors, (158), 64 states have internal predecessors, (158), 31 states have call successors, (31), 1 states have call predecessors, (31), 29 states have return successors, (57), 31 states have call predecessors, (57), 31 states have call successors, (57) [2022-07-22 17:43:53,500 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-07-22 17:43:53,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-07-22 17:43:53,500 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:43:53,500 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:43:53,534 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-07-22 17:43:53,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-07-22 17:43:53,715 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:43:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:43:53,716 INFO L85 PathProgramCache]: Analyzing trace with hash -941688870, now seen corresponding path program 14 times [2022-07-22 17:43:53,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:43:53,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774984395] [2022-07-22 17:43:53,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:43:53,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:43:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:53,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:53,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:53,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:53,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:53,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:54,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:55,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:55,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:55,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:55,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:55,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:55,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:43:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:43:55,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-07-22 17:43:55,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:43:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774984395] [2022-07-22 17:43:55,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774984395] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:43:55,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587571457] [2022-07-22 17:43:55,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:43:55,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:43:55,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:43:55,329 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:43:55,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 17:43:56,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:43:56,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:43:56,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 240 conjunts are in the unsatisfiable core [2022-07-22 17:43:56,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:43:56,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 770 trivial. 0 not checked. [2022-07-22 17:43:56,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:44:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1148 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-07-22 17:44:03,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587571457] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:44:03,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:44:03,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 90] total 99 [2022-07-22 17:44:03,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184924876] [2022-07-22 17:44:03,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:44:03,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-22 17:44:03,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:44:03,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-22 17:44:03,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=9356, Unknown=0, NotChecked=0, Total=9702 [2022-07-22 17:44:03,836 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 67 states have internal predecessors, (164), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) [2022-07-22 17:44:06,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:44:06,076 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2022-07-22 17:44:06,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 17:44:06,077 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 67 states have internal predecessors, (164), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) Word has length 208 [2022-07-22 17:44:06,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:44:06,078 INFO L225 Difference]: With dead ends: 195 [2022-07-22 17:44:06,078 INFO L226 Difference]: Without dead ends: 191 [2022-07-22 17:44:06,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 408 SyntacticMatches, 30 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1436, Invalid=23056, Unknown=0, NotChecked=0, Total=24492 [2022-07-22 17:44:06,081 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 116 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 3837 mSolverCounterSat, 467 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1993 SdHoareTripleChecker+Invalid, 4304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 467 IncrementalHoareTripleChecker+Valid, 3837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 17:44:06,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1993 Invalid, 4304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [467 Valid, 3837 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 17:44:06,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-07-22 17:44:06,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 108. [2022-07-22 17:44:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 2 states have call predecessors, (3), 31 states have return successors, (32), 31 states have call predecessors, (32), 3 states have call successors, (32) [2022-07-22 17:44:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2022-07-22 17:44:06,087 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 208 [2022-07-22 17:44:06,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:44:06,088 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2022-07-22 17:44:06,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 97 states have (on average 1.690721649484536) internal successors, (164), 67 states have internal predecessors, (164), 33 states have call successors, (33), 1 states have call predecessors, (33), 30 states have return successors, (59), 32 states have call predecessors, (59), 33 states have call successors, (59) [2022-07-22 17:44:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2022-07-22 17:44:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-22 17:44:06,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:44:06,089 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:44:06,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-22 17:44:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:06,303 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:44:06,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:44:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash 482690706, now seen corresponding path program 14 times [2022-07-22 17:44:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:44:06,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106926537] [2022-07-22 17:44:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:44:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:44:06,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:06,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:07,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:07,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:08,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:08,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:08,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-07-22 17:44:08,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:44:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106926537] [2022-07-22 17:44:08,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106926537] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:44:08,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249697289] [2022-07-22 17:44:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 17:44:08,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:08,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:44:08,283 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:44:08,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 17:44:09,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 17:44:09,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:44:09,506 WARN L261 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 248 conjunts are in the unsatisfiable core [2022-07-22 17:44:09,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:44:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 826 trivial. 0 not checked. [2022-07-22 17:44:09,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:44:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 0 proven. 1232 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-07-22 17:44:18,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249697289] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:44:18,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:44:18,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66, 93] total 101 [2022-07-22 17:44:18,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918323389] [2022-07-22 17:44:18,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:44:18,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-07-22 17:44:18,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:44:18,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-07-22 17:44:18,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=9748, Unknown=0, NotChecked=0, Total=10100 [2022-07-22 17:44:18,160 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 101 states, 100 states have (on average 1.68) internal successors, (168), 68 states have internal predecessors, (168), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) [2022-07-22 17:44:21,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:44:21,464 INFO L93 Difference]: Finished difference Result 201 states and 203 transitions. [2022-07-22 17:44:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 17:44:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.68) internal successors, (168), 68 states have internal predecessors, (168), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) Word has length 215 [2022-07-22 17:44:21,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:44:21,467 INFO L225 Difference]: With dead ends: 201 [2022-07-22 17:44:21,467 INFO L226 Difference]: Without dead ends: 197 [2022-07-22 17:44:21,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 425 SyntacticMatches, 29 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3168 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1542, Invalid=24540, Unknown=0, NotChecked=0, Total=26082 [2022-07-22 17:44:21,469 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 92 mSDsluCounter, 2212 mSDsCounter, 0 mSdLazyCounter, 4236 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 2254 SdHoareTripleChecker+Invalid, 4299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 17:44:21,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 2254 Invalid, 4299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4236 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-22 17:44:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-07-22 17:44:21,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 111. [2022-07-22 17:44:21,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 2 states have call predecessors, (3), 32 states have return successors, (33), 32 states have call predecessors, (33), 3 states have call successors, (33) [2022-07-22 17:44:21,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2022-07-22 17:44:21,480 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 215 [2022-07-22 17:44:21,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:44:21,480 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2022-07-22 17:44:21,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 1.68) internal successors, (168), 68 states have internal predecessors, (168), 33 states have call successors, (33), 1 states have call predecessors, (33), 31 states have return successors, (61), 33 states have call predecessors, (61), 33 states have call successors, (61) [2022-07-22 17:44:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2022-07-22 17:44:21,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-22 17:44:21,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:44:21,481 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:44:21,504 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-22 17:44:21,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:21,684 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:44:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:44:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 837482372, now seen corresponding path program 15 times [2022-07-22 17:44:21,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:44:21,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070490148] [2022-07-22 17:44:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:44:21,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:44:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:21,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:21,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:21,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:21,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:21,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:21,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:22,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:23,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2022-07-22 17:44:23,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:44:23,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070490148] [2022-07-22 17:44:23,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070490148] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:44:23,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889597182] [2022-07-22 17:44:23,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:44:23,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:23,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:44:23,769 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:44:23,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 17:44:25,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 17:44:25,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:44:25,044 WARN L261 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 256 conjunts are in the unsatisfiable core [2022-07-22 17:44:25,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:44:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 885 trivial. 0 not checked. [2022-07-22 17:44:25,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:44:33,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1545 backedges. 0 proven. 1320 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2022-07-22 17:44:33,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889597182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:44:33,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:44:33,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 96] total 105 [2022-07-22 17:44:33,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927692221] [2022-07-22 17:44:33,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:44:33,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-07-22 17:44:33,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:44:33,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-07-22 17:44:33,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=10552, Unknown=0, NotChecked=0, Total=10920 [2022-07-22 17:44:33,436 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 105 states, 103 states have (on average 1.6893203883495145) internal successors, (174), 71 states have internal predecessors, (174), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) [2022-07-22 17:44:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:44:35,968 INFO L93 Difference]: Finished difference Result 207 states and 209 transitions. [2022-07-22 17:44:35,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-22 17:44:35,969 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 103 states have (on average 1.6893203883495145) internal successors, (174), 71 states have internal predecessors, (174), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) Word has length 222 [2022-07-22 17:44:35,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:44:35,970 INFO L225 Difference]: With dead ends: 207 [2022-07-22 17:44:35,970 INFO L226 Difference]: Without dead ends: 203 [2022-07-22 17:44:35,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 436 SyntacticMatches, 32 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3676 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1595, Invalid=26127, Unknown=0, NotChecked=0, Total=27722 [2022-07-22 17:44:35,973 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 36 mSDsluCounter, 2371 mSDsCounter, 0 mSdLazyCounter, 4444 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 2414 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 17:44:35,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 2414 Invalid, 4575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4444 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-22 17:44:35,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-07-22 17:44:35,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 114. [2022-07-22 17:44:35,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 33 states have return successors, (34), 33 states have call predecessors, (34), 3 states have call successors, (34) [2022-07-22 17:44:35,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2022-07-22 17:44:35,978 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 222 [2022-07-22 17:44:35,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:44:35,978 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2022-07-22 17:44:35,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 103 states have (on average 1.6893203883495145) internal successors, (174), 71 states have internal predecessors, (174), 35 states have call successors, (35), 1 states have call predecessors, (35), 32 states have return successors, (63), 34 states have call predecessors, (63), 35 states have call successors, (63) [2022-07-22 17:44:35,978 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2022-07-22 17:44:35,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-22 17:44:35,979 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:44:35,979 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:44:36,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-22 17:44:36,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:36,191 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:44:36,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:44:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1020068268, now seen corresponding path program 15 times [2022-07-22 17:44:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:44:36,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751717853] [2022-07-22 17:44:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:44:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:44:36,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:36,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:36,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:37,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:38,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:38,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:38,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:38,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:38,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:38,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-07-22 17:44:38,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:44:38,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751717853] [2022-07-22 17:44:38,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751717853] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:44:38,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718219507] [2022-07-22 17:44:38,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 17:44:38,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:44:38,704 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:44:38,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 17:44:39,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 17:44:39,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:44:39,994 WARN L261 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 264 conjunts are in the unsatisfiable core [2022-07-22 17:44:39,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:44:40,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 945 trivial. 0 not checked. [2022-07-22 17:44:40,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 17:44:49,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1650 backedges. 0 proven. 1410 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2022-07-22 17:44:49,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718219507] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 17:44:49,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 17:44:49,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 99] total 108 [2022-07-22 17:44:49,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404303451] [2022-07-22 17:44:49,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 17:44:49,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-07-22 17:44:49,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 17:44:49,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-07-22 17:44:49,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=11178, Unknown=0, NotChecked=0, Total=11556 [2022-07-22 17:44:49,375 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 108 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 73 states have internal predecessors, (179), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) [2022-07-22 17:44:53,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 17:44:53,568 INFO L93 Difference]: Finished difference Result 213 states and 215 transitions. [2022-07-22 17:44:53,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-22 17:44:53,569 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 73 states have internal predecessors, (179), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) Word has length 229 [2022-07-22 17:44:53,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 17:44:53,569 INFO L225 Difference]: With dead ends: 213 [2022-07-22 17:44:53,570 INFO L226 Difference]: Without dead ends: 209 [2022-07-22 17:44:53,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 452 SyntacticMatches, 31 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3831 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1712, Invalid=28044, Unknown=0, NotChecked=0, Total=29756 [2022-07-22 17:44:53,573 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 103 mSDsluCounter, 2424 mSDsCounter, 0 mSdLazyCounter, 4826 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 2468 SdHoareTripleChecker+Invalid, 4895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 4826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 17:44:53,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 2468 Invalid, 4895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 4826 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-22 17:44:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-07-22 17:44:53,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 117. [2022-07-22 17:44:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 2 states have call predecessors, (3), 34 states have return successors, (35), 34 states have call predecessors, (35), 3 states have call successors, (35) [2022-07-22 17:44:53,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 119 transitions. [2022-07-22 17:44:53,576 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 119 transitions. Word has length 229 [2022-07-22 17:44:53,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 17:44:53,576 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 119 transitions. [2022-07-22 17:44:53,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 106 states have (on average 1.6886792452830188) internal successors, (179), 73 states have internal predecessors, (179), 36 states have call successors, (36), 1 states have call predecessors, (36), 33 states have return successors, (65), 35 states have call predecessors, (65), 36 states have call successors, (65) [2022-07-22 17:44:53,576 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 119 transitions. [2022-07-22 17:44:53,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-07-22 17:44:53,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 17:44:53,577 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 17:44:53,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-22 17:44:53,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-07-22 17:44:53,799 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 17:44:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 17:44:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1968238162, now seen corresponding path program 16 times [2022-07-22 17:44:53,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 17:44:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905292744] [2022-07-22 17:44:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 17:44:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 17:44:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:53,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:53,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:53,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:54,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:54,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:55,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:55,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:56,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:56,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:56,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-22 17:44:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 17:44:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2022-07-22 17:44:56,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 17:44:56,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905292744] [2022-07-22 17:44:56,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905292744] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 17:44:56,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165546165] [2022-07-22 17:44:56,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 17:44:56,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 17:44:56,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 17:44:56,349 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 17:44:56,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 17:44:57,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 17:44:57,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 17:44:57,671 WARN L261 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 272 conjunts are in the unsatisfiable core [2022-07-22 17:44:57,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 17:44:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1760 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 1008 trivial. 0 not checked. [2022-07-22 17:44:58,331 INFO L328 TraceCheckSpWp]: Computing backward predicates...