./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/eca-rers2012/Problem03_label28.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 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:47:10,361 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:47:10,362 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:47:10,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:47:10,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:47:10,384 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:47:10,385 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:47:10,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:47:10,387 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:47:10,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:47:10,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:47:10,389 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:47:10,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:47:10,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:47:10,390 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:47:10,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:47:10,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:47:10,392 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:47:10,393 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:47:10,394 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:47:10,395 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:47:10,396 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:47:10,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:47:10,397 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:47:10,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:47:10,400 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:47:10,400 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:47:10,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:47:10,401 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:47:10,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:47:10,401 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:47:10,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:47:10,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:47:10,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:47:10,403 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:47:10,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:47:10,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:47:10,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:47:10,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:47:10,405 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:47:10,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:47:10,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:47:10,407 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:47:10,442 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:47:10,444 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:47:10,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:47:10,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:47:10,446 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:47:10,446 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:47:10,447 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:47:10,447 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:47:10,447 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:47:10,448 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:47:10,448 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:47:10,448 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:47:10,448 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:47:10,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:47:10,449 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:47:10,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:47:10,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:47:10,449 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:47:10,449 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:47:10,449 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:47:10,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:47:10,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:47:10,450 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:47:10,450 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:47:10,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:47:10,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:47:10,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:47:10,451 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:47:10,451 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:47:10,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:47:10,452 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:47:10,452 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:47:10,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:47:10,452 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 [2022-07-20 22:47:10,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:47:10,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:47:10,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:47:10,764 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:47:10,765 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:47:10,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2022-07-20 22:47:10,819 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f282d364/4a6d3865404046fcbfd800b021487f27/FLAGdfb56d500 [2022-07-20 22:47:11,360 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:47:11,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2022-07-20 22:47:11,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f282d364/4a6d3865404046fcbfd800b021487f27/FLAGdfb56d500 [2022-07-20 22:47:11,659 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f282d364/4a6d3865404046fcbfd800b021487f27 [2022-07-20 22:47:11,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:47:11,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:47:11,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:47:11,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:47:11,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:47:11,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11bf9ed2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:11, skipping insertion in model container [2022-07-20 22:47:11,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:47:11" (1/1) ... [2022-07-20 22:47:11,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:47:11,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:47:12,175 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/eca-rers2012/Problem03_label28.c[54731,54744] [2022-07-20 22:47:12,207 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:47:12,212 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:47:12,338 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/eca-rers2012/Problem03_label28.c[54731,54744] [2022-07-20 22:47:12,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:47:12,362 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:47:12,363 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12 WrapperNode [2022-07-20 22:47:12,363 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:47:12,364 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:47:12,364 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:47:12,364 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:47:12,368 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,470 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-20 22:47:12,470 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:47:12,471 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:47:12,471 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:47:12,471 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:47:12,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,531 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,548 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,616 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:47:12,618 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:47:12,619 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:47:12,619 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:47:12,619 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (1/1) ... [2022-07-20 22:47:12,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:47:12,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:12,651 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) [2022-07-20 22:47:12,671 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 [2022-07-20 22:47:12,684 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:47:12,685 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:47:12,685 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:47:12,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:47:12,768 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:47:12,769 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:47:13,894 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:47:13,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:47:13,916 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 22:47:13,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:47:13 BoogieIcfgContainer [2022-07-20 22:47:13,918 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:47:13,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:47:13,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:47:13,921 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:47:13,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:47:11" (1/3) ... [2022-07-20 22:47:13,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cac86d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:47:13, skipping insertion in model container [2022-07-20 22:47:13,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:47:12" (2/3) ... [2022-07-20 22:47:13,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35cac86d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:47:13, skipping insertion in model container [2022-07-20 22:47:13,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:47:13" (3/3) ... [2022-07-20 22:47:13,923 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2022-07-20 22:47:13,933 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:47:13,933 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:47:13,986 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:47:13,991 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@18b0c46c, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@28a279c4 [2022-07-20 22:47:13,992 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:47:13,998 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-20 22:47:14,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:14,009 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:14,010 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:14,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:14,013 INFO L85 PathProgramCache]: Analyzing trace with hash 697342114, now seen corresponding path program 1 times [2022-07-20 22:47:14,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:14,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597171146] [2022-07-20 22:47:14,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:14,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:14,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:14,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597171146] [2022-07-20 22:47:14,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597171146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:14,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:14,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:14,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757031424] [2022-07-20 22:47:14,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:14,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:14,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:14,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:14,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:14,549 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:15,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:15,356 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2022-07-20 22:47:15,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:15,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-20 22:47:15,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:15,375 INFO L225 Difference]: With dead ends: 824 [2022-07-20 22:47:15,375 INFO L226 Difference]: Without dead ends: 445 [2022-07-20 22:47:15,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:15,384 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 78 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:15,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 247 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:47:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-07-20 22:47:15,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2022-07-20 22:47:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.417607223476298) internal successors, (628), 443 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 628 transitions. [2022-07-20 22:47:15,448 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 628 transitions. Word has length 152 [2022-07-20 22:47:15,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:15,448 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 628 transitions. [2022-07-20 22:47:15,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:15,449 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 628 transitions. [2022-07-20 22:47:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-20 22:47:15,457 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:15,457 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:15,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:47:15,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:15,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:15,458 INFO L85 PathProgramCache]: Analyzing trace with hash 233587009, now seen corresponding path program 1 times [2022-07-20 22:47:15,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:15,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154345171] [2022-07-20 22:47:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:15,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:15,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:15,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:15,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154345171] [2022-07-20 22:47:15,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154345171] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:15,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:15,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:15,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665107266] [2022-07-20 22:47:15,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:15,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:15,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:15,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:15,543 INFO L87 Difference]: Start difference. First operand 444 states and 628 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:16,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:16,185 INFO L93 Difference]: Finished difference Result 1313 states and 1864 transitions. [2022-07-20 22:47:16,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-07-20 22:47:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:16,189 INFO L225 Difference]: With dead ends: 1313 [2022-07-20 22:47:16,189 INFO L226 Difference]: Without dead ends: 871 [2022-07-20 22:47:16,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:16,195 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:16,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:16,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-20 22:47:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 857. [2022-07-20 22:47:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.3843457943925233) internal successors, (1185), 856 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1185 transitions. [2022-07-20 22:47:16,230 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1185 transitions. Word has length 160 [2022-07-20 22:47:16,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:16,231 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1185 transitions. [2022-07-20 22:47:16,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:16,231 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1185 transitions. [2022-07-20 22:47:16,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-20 22:47:16,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:16,233 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:16,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:47:16,234 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:16,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:16,234 INFO L85 PathProgramCache]: Analyzing trace with hash 651701228, now seen corresponding path program 1 times [2022-07-20 22:47:16,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:16,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674576979] [2022-07-20 22:47:16,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:16,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:16,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:16,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:47:16,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:16,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674576979] [2022-07-20 22:47:16,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674576979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:16,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:16,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:16,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397606821] [2022-07-20 22:47:16,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:16,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:16,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:16,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:16,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:16,371 INFO L87 Difference]: Start difference. First operand 857 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:17,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:17,010 INFO L93 Difference]: Finished difference Result 2130 states and 3052 transitions. [2022-07-20 22:47:17,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:17,017 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-07-20 22:47:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:17,022 INFO L225 Difference]: With dead ends: 2130 [2022-07-20 22:47:17,022 INFO L226 Difference]: Without dead ends: 1275 [2022-07-20 22:47:17,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:17,027 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:17,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 346 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:17,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-07-20 22:47:17,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-07-20 22:47:17,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 1.395440251572327) internal successors, (1775), 1272 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:17,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1775 transitions. [2022-07-20 22:47:17,045 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1775 transitions. Word has length 167 [2022-07-20 22:47:17,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:17,045 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1775 transitions. [2022-07-20 22:47:17,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:17,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1775 transitions. [2022-07-20 22:47:17,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-20 22:47:17,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:17,048 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:17,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 22:47:17,048 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:17,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:17,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1455733754, now seen corresponding path program 1 times [2022-07-20 22:47:17,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:17,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425118735] [2022-07-20 22:47:17,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:17,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:47:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:17,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425118735] [2022-07-20 22:47:17,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425118735] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:17,102 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:17,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:17,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236169789] [2022-07-20 22:47:17,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:17,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:17,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:17,103 INFO L87 Difference]: Start difference. First operand 1273 states and 1775 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:17,725 INFO L93 Difference]: Finished difference Result 3774 states and 5271 transitions. [2022-07-20 22:47:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-07-20 22:47:17,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:17,732 INFO L225 Difference]: With dead ends: 3774 [2022-07-20 22:47:17,733 INFO L226 Difference]: Without dead ends: 2503 [2022-07-20 22:47:17,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:17,735 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:17,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 365 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:17,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-07-20 22:47:17,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2499. [2022-07-20 22:47:17,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 1.3062449959967974) internal successors, (3263), 2498 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:17,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3263 transitions. [2022-07-20 22:47:17,772 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3263 transitions. Word has length 173 [2022-07-20 22:47:17,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:17,772 INFO L495 AbstractCegarLoop]: Abstraction has 2499 states and 3263 transitions. [2022-07-20 22:47:17,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:17,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3263 transitions. [2022-07-20 22:47:17,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-20 22:47:17,776 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:17,776 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:17,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 22:47:17,776 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:17,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:17,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1109508564, now seen corresponding path program 1 times [2022-07-20 22:47:17,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:17,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211806662] [2022-07-20 22:47:17,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:17,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-20 22:47:17,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:17,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211806662] [2022-07-20 22:47:17,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211806662] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:17,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:17,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:17,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982600437] [2022-07-20 22:47:17,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:17,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:17,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:17,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:17,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:17,831 INFO L87 Difference]: Start difference. First operand 2499 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:18,414 INFO L93 Difference]: Finished difference Result 5818 states and 7631 transitions. [2022-07-20 22:47:18,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:18,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-07-20 22:47:18,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:18,423 INFO L225 Difference]: With dead ends: 5818 [2022-07-20 22:47:18,424 INFO L226 Difference]: Without dead ends: 3321 [2022-07-20 22:47:18,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:18,427 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:18,427 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 364 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:18,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2022-07-20 22:47:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 3312. [2022-07-20 22:47:18,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 1.266384778012685) internal successors, (4193), 3311 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:18,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 4193 transitions. [2022-07-20 22:47:18,473 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 4193 transitions. Word has length 180 [2022-07-20 22:47:18,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:18,474 INFO L495 AbstractCegarLoop]: Abstraction has 3312 states and 4193 transitions. [2022-07-20 22:47:18,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 4193 transitions. [2022-07-20 22:47:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-20 22:47:18,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:18,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:18,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 22:47:18,478 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:18,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:18,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1324416253, now seen corresponding path program 1 times [2022-07-20 22:47:18,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:18,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420986278] [2022-07-20 22:47:18,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:18,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:47:18,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:18,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420986278] [2022-07-20 22:47:18,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420986278] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:18,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:18,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:18,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874886646] [2022-07-20 22:47:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:18,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:18,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:18,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:18,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:18,536 INFO L87 Difference]: Start difference. First operand 3312 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:19,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:19,180 INFO L93 Difference]: Finished difference Result 8881 states and 11393 transitions. [2022-07-20 22:47:19,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:19,181 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-20 22:47:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:19,200 INFO L225 Difference]: With dead ends: 8881 [2022-07-20 22:47:19,200 INFO L226 Difference]: Without dead ends: 5571 [2022-07-20 22:47:19,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:19,206 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:19,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 238 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:19,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-07-20 22:47:19,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5551. [2022-07-20 22:47:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 1.2855855855855856) internal successors, (7135), 5550 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:19,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 7135 transitions. [2022-07-20 22:47:19,288 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 7135 transitions. Word has length 195 [2022-07-20 22:47:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:19,289 INFO L495 AbstractCegarLoop]: Abstraction has 5551 states and 7135 transitions. [2022-07-20 22:47:19,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:19,289 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 7135 transitions. [2022-07-20 22:47:19,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-20 22:47:19,295 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:19,296 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:19,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 22:47:19,296 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:19,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1341529967, now seen corresponding path program 1 times [2022-07-20 22:47:19,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:19,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410511202] [2022-07-20 22:47:19,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:19,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:19,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:47:19,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:19,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410511202] [2022-07-20 22:47:19,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410511202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:19,376 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:19,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596867966] [2022-07-20 22:47:19,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:19,378 INFO L87 Difference]: Start difference. First operand 5551 states and 7135 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:20,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:20,338 INFO L93 Difference]: Finished difference Result 10714 states and 13855 transitions. [2022-07-20 22:47:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:20,339 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-07-20 22:47:20,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:20,352 INFO L225 Difference]: With dead ends: 10714 [2022-07-20 22:47:20,352 INFO L226 Difference]: Without dead ends: 5571 [2022-07-20 22:47:20,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:20,357 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 444 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:20,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 122 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-20 22:47:20,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-07-20 22:47:20,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5348. [2022-07-20 22:47:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 5347 states have (on average 1.2870768655320741) internal successors, (6882), 5347 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 6882 transitions. [2022-07-20 22:47:20,420 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 6882 transitions. Word has length 196 [2022-07-20 22:47:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:20,420 INFO L495 AbstractCegarLoop]: Abstraction has 5348 states and 6882 transitions. [2022-07-20 22:47:20,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:20,420 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 6882 transitions. [2022-07-20 22:47:20,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-20 22:47:20,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:20,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:20,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 22:47:20,426 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:20,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:20,427 INFO L85 PathProgramCache]: Analyzing trace with hash 221221588, now seen corresponding path program 1 times [2022-07-20 22:47:20,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:20,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12570396] [2022-07-20 22:47:20,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:20,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:20,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:47:20,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:20,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12570396] [2022-07-20 22:47:20,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12570396] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:20,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:20,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:20,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529534806] [2022-07-20 22:47:20,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:20,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:20,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:20,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:20,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:20,480 INFO L87 Difference]: Start difference. First operand 5348 states and 6882 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:21,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:21,089 INFO L93 Difference]: Finished difference Result 14176 states and 18488 transitions. [2022-07-20 22:47:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:21,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-20 22:47:21,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:21,115 INFO L225 Difference]: With dead ends: 14176 [2022-07-20 22:47:21,115 INFO L226 Difference]: Without dead ends: 9236 [2022-07-20 22:47:21,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:21,123 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:21,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 168 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:21,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2022-07-20 22:47:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 9226. [2022-07-20 22:47:21,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9226 states, 9225 states have (on average 1.272411924119241) internal successors, (11738), 9225 states have internal predecessors, (11738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:21,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9226 states to 9226 states and 11738 transitions. [2022-07-20 22:47:21,292 INFO L78 Accepts]: Start accepts. Automaton has 9226 states and 11738 transitions. Word has length 199 [2022-07-20 22:47:21,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:21,293 INFO L495 AbstractCegarLoop]: Abstraction has 9226 states and 11738 transitions. [2022-07-20 22:47:21,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:21,293 INFO L276 IsEmpty]: Start isEmpty. Operand 9226 states and 11738 transitions. [2022-07-20 22:47:21,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-20 22:47:21,301 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:21,301 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:21,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 22:47:21,301 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:21,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash 399462554, now seen corresponding path program 1 times [2022-07-20 22:47:21,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:21,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193330845] [2022-07-20 22:47:21,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-20 22:47:21,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193330845] [2022-07-20 22:47:21,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193330845] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:21,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433773574] [2022-07-20 22:47:21,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:21,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:21,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:21,384 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) [2022-07-20 22:47:21,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:47:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:21,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:21,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:21,687 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-20 22:47:21,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:21,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433773574] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:21,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:21,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-20 22:47:21,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012911728] [2022-07-20 22:47:21,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:21,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:21,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:21,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:21,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:21,688 INFO L87 Difference]: Start difference. First operand 9226 states and 11738 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:22,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:22,313 INFO L93 Difference]: Finished difference Result 18272 states and 23302 transitions. [2022-07-20 22:47:22,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:22,313 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-07-20 22:47:22,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:22,329 INFO L225 Difference]: With dead ends: 18272 [2022-07-20 22:47:22,329 INFO L226 Difference]: Without dead ends: 9048 [2022-07-20 22:47:22,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-20 22:47:22,338 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:22,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 350 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2022-07-20 22:47:22,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 9023. [2022-07-20 22:47:22,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9023 states, 9022 states have (on average 1.2631345599645312) internal successors, (11396), 9022 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:22,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9023 states to 9023 states and 11396 transitions. [2022-07-20 22:47:22,451 INFO L78 Accepts]: Start accepts. Automaton has 9023 states and 11396 transitions. Word has length 203 [2022-07-20 22:47:22,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:22,452 INFO L495 AbstractCegarLoop]: Abstraction has 9023 states and 11396 transitions. [2022-07-20 22:47:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:22,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9023 states and 11396 transitions. [2022-07-20 22:47:22,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-20 22:47:22,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:22,463 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:22,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 22:47:22,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:22,668 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:22,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:22,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1333067857, now seen corresponding path program 1 times [2022-07-20 22:47:22,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:22,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81833118] [2022-07-20 22:47:22,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:22,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:22,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-20 22:47:22,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:22,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81833118] [2022-07-20 22:47:22,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81833118] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:22,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557038298] [2022-07-20 22:47:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:22,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:22,770 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) [2022-07-20 22:47:22,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:47:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:47:22,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 22:47:23,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:47:23,397 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 22:47:23,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557038298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:47:23,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:47:23,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-07-20 22:47:23,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934151196] [2022-07-20 22:47:23,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:47:23,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-20 22:47:23,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-20 22:47:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:23,399 INFO L87 Difference]: Start difference. First operand 9023 states and 11396 transitions. Second operand has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:26,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:26,581 INFO L93 Difference]: Finished difference Result 50965 states and 65536 transitions. [2022-07-20 22:47:26,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-20 22:47:26,582 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-07-20 22:47:26,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:26,653 INFO L225 Difference]: With dead ends: 50965 [2022-07-20 22:47:26,653 INFO L226 Difference]: Without dead ends: 42350 [2022-07-20 22:47:26,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:47:26,673 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2714 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 3887 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2714 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 4934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 3887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:26,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2714 Valid, 339 Invalid, 4934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 3887 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 22:47:26,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42350 states. [2022-07-20 22:47:27,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42350 to 42295. [2022-07-20 22:47:27,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42295 states, 42294 states have (on average 1.2161772355416844) internal successors, (51437), 42294 states have internal predecessors, (51437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42295 states to 42295 states and 51437 transitions. [2022-07-20 22:47:27,239 INFO L78 Accepts]: Start accepts. Automaton has 42295 states and 51437 transitions. Word has length 237 [2022-07-20 22:47:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:27,239 INFO L495 AbstractCegarLoop]: Abstraction has 42295 states and 51437 transitions. [2022-07-20 22:47:27,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:27,240 INFO L276 IsEmpty]: Start isEmpty. Operand 42295 states and 51437 transitions. [2022-07-20 22:47:27,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-20 22:47:27,268 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:27,268 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:27,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:27,475 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,SelfDestructingSolverStorable9 [2022-07-20 22:47:27,476 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:27,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:27,476 INFO L85 PathProgramCache]: Analyzing trace with hash -879094002, now seen corresponding path program 1 times [2022-07-20 22:47:27,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:27,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415726377] [2022-07-20 22:47:27,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:27,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 22:47:27,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415726377] [2022-07-20 22:47:27,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415726377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:27,568 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:27,568 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845506899] [2022-07-20 22:47:27,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:27,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:27,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:27,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:27,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:27,570 INFO L87 Difference]: Start difference. First operand 42295 states and 51437 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:28,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:28,411 INFO L93 Difference]: Finished difference Result 79779 states and 97309 transitions. [2022-07-20 22:47:28,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:28,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-07-20 22:47:28,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:28,462 INFO L225 Difference]: With dead ends: 79779 [2022-07-20 22:47:28,463 INFO L226 Difference]: Without dead ends: 38095 [2022-07-20 22:47:28,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:28,498 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 460 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:28,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 55 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38095 states. [2022-07-20 22:47:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38095 to 36877. [2022-07-20 22:47:29,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36877 states, 36876 states have (on average 1.1884423473261743) internal successors, (43825), 36876 states have internal predecessors, (43825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36877 states to 36877 states and 43825 transitions. [2022-07-20 22:47:29,201 INFO L78 Accepts]: Start accepts. Automaton has 36877 states and 43825 transitions. Word has length 254 [2022-07-20 22:47:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:29,201 INFO L495 AbstractCegarLoop]: Abstraction has 36877 states and 43825 transitions. [2022-07-20 22:47:29,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 36877 states and 43825 transitions. [2022-07-20 22:47:29,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-20 22:47:29,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:29,226 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:29,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 22:47:29,227 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:29,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:29,228 INFO L85 PathProgramCache]: Analyzing trace with hash 222566490, now seen corresponding path program 1 times [2022-07-20 22:47:29,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:29,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950112428] [2022-07-20 22:47:29,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:29,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:29,314 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-20 22:47:29,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:29,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950112428] [2022-07-20 22:47:29,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950112428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:29,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:29,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:29,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464594611] [2022-07-20 22:47:29,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:29,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:29,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:29,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:29,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:29,316 INFO L87 Difference]: Start difference. First operand 36877 states and 43825 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:30,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:30,093 INFO L93 Difference]: Finished difference Result 89218 states and 106693 transitions. [2022-07-20 22:47:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-07-20 22:47:30,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:30,165 INFO L225 Difference]: With dead ends: 89218 [2022-07-20 22:47:30,166 INFO L226 Difference]: Without dead ends: 52952 [2022-07-20 22:47:30,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:30,189 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:30,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 119 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:30,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52952 states. [2022-07-20 22:47:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52952 to 52946. [2022-07-20 22:47:30,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52946 states, 52945 states have (on average 1.1929171782037964) internal successors, (63159), 52945 states have internal predecessors, (63159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:31,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52946 states to 52946 states and 63159 transitions. [2022-07-20 22:47:31,046 INFO L78 Accepts]: Start accepts. Automaton has 52946 states and 63159 transitions. Word has length 254 [2022-07-20 22:47:31,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:31,046 INFO L495 AbstractCegarLoop]: Abstraction has 52946 states and 63159 transitions. [2022-07-20 22:47:31,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 52946 states and 63159 transitions. [2022-07-20 22:47:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-20 22:47:31,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:31,071 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:31,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 22:47:31,071 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash -52091255, now seen corresponding path program 1 times [2022-07-20 22:47:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:31,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771560281] [2022-07-20 22:47:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:31,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-20 22:47:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:31,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771560281] [2022-07-20 22:47:31,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771560281] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:31,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:31,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228407228] [2022-07-20 22:47:31,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:31,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:31,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:31,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:31,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:31,174 INFO L87 Difference]: Start difference. First operand 52946 states and 63159 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:32,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:32,016 INFO L93 Difference]: Finished difference Result 119085 states and 143041 transitions. [2022-07-20 22:47:32,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:32,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-07-20 22:47:32,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:32,098 INFO L225 Difference]: With dead ends: 119085 [2022-07-20 22:47:32,098 INFO L226 Difference]: Without dead ends: 67765 [2022-07-20 22:47:32,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:32,136 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 140 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:32,136 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 152 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:32,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67765 states. [2022-07-20 22:47:32,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67765 to 67765. [2022-07-20 22:47:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67765 states, 67764 states have (on average 1.1491942624402338) internal successors, (77874), 67764 states have internal predecessors, (77874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67765 states to 67765 states and 77874 transitions. [2022-07-20 22:47:33,021 INFO L78 Accepts]: Start accepts. Automaton has 67765 states and 77874 transitions. Word has length 266 [2022-07-20 22:47:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:33,021 INFO L495 AbstractCegarLoop]: Abstraction has 67765 states and 77874 transitions. [2022-07-20 22:47:33,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 67765 states and 77874 transitions. [2022-07-20 22:47:33,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-07-20 22:47:33,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:33,042 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:33,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 22:47:33,042 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:33,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1098622564, now seen corresponding path program 1 times [2022-07-20 22:47:33,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:33,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361263422] [2022-07-20 22:47:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:33,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:33,143 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 22:47:33,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:33,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361263422] [2022-07-20 22:47:33,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361263422] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:33,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:33,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655396336] [2022-07-20 22:47:33,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:33,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:33,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:33,147 INFO L87 Difference]: Start difference. First operand 67765 states and 77874 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:34,032 INFO L93 Difference]: Finished difference Result 116617 states and 133672 transitions. [2022-07-20 22:47:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:34,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2022-07-20 22:47:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:34,123 INFO L225 Difference]: With dead ends: 116617 [2022-07-20 22:47:34,123 INFO L226 Difference]: Without dead ends: 69795 [2022-07-20 22:47:34,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:34,166 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:34,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 359 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:47:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69795 states. [2022-07-20 22:47:34,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69795 to 69795. [2022-07-20 22:47:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69795 states, 69794 states have (on average 1.1438232512823452) internal successors, (79832), 69794 states have internal predecessors, (79832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:35,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69795 states to 69795 states and 79832 transitions. [2022-07-20 22:47:35,016 INFO L78 Accepts]: Start accepts. Automaton has 69795 states and 79832 transitions. Word has length 268 [2022-07-20 22:47:35,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:35,016 INFO L495 AbstractCegarLoop]: Abstraction has 69795 states and 79832 transitions. [2022-07-20 22:47:35,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 69795 states and 79832 transitions. [2022-07-20 22:47:35,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-07-20 22:47:35,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:35,041 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:35,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-20 22:47:35,041 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:35,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:35,042 INFO L85 PathProgramCache]: Analyzing trace with hash -170040178, now seen corresponding path program 1 times [2022-07-20 22:47:35,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:35,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079577531] [2022-07-20 22:47:35,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:35,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:35,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 22:47:35,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079577531] [2022-07-20 22:47:35,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079577531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:35,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:35,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:35,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974608575] [2022-07-20 22:47:35,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:35,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:35,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:35,299 INFO L87 Difference]: Start difference. First operand 69795 states and 79832 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:36,211 INFO L93 Difference]: Finished difference Result 131685 states and 150641 transitions. [2022-07-20 22:47:36,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:36,212 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2022-07-20 22:47:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:36,302 INFO L225 Difference]: With dead ends: 131685 [2022-07-20 22:47:36,302 INFO L226 Difference]: Without dead ends: 83239 [2022-07-20 22:47:36,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:36,317 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:36,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 170 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:36,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83239 states. [2022-07-20 22:47:37,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83239 to 76709. [2022-07-20 22:47:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76709 states, 76708 states have (on average 1.151314074151327) internal successors, (88315), 76708 states have internal predecessors, (88315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:37,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76709 states to 76709 states and 88315 transitions. [2022-07-20 22:47:37,392 INFO L78 Accepts]: Start accepts. Automaton has 76709 states and 88315 transitions. Word has length 273 [2022-07-20 22:47:37,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:37,392 INFO L495 AbstractCegarLoop]: Abstraction has 76709 states and 88315 transitions. [2022-07-20 22:47:37,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:37,392 INFO L276 IsEmpty]: Start isEmpty. Operand 76709 states and 88315 transitions. [2022-07-20 22:47:37,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-20 22:47:37,416 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:37,417 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:37,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 22:47:37,417 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash -752188596, now seen corresponding path program 1 times [2022-07-20 22:47:37,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:37,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987477162] [2022-07-20 22:47:37,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-20 22:47:37,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:37,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987477162] [2022-07-20 22:47:37,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987477162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:37,509 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:37,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:37,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190403481] [2022-07-20 22:47:37,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:37,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:37,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:37,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:37,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:37,511 INFO L87 Difference]: Start difference. First operand 76709 states and 88315 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:38,414 INFO L93 Difference]: Finished difference Result 151387 states and 174442 transitions. [2022-07-20 22:47:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:38,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-07-20 22:47:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:38,497 INFO L225 Difference]: With dead ends: 151387 [2022-07-20 22:47:38,497 INFO L226 Difference]: Without dead ends: 76710 [2022-07-20 22:47:38,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:38,519 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:38,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 151 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76710 states. [2022-07-20 22:47:39,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76710 to 76709. [2022-07-20 22:47:39,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76709 states, 76708 states have (on average 1.1512749648015852) internal successors, (88312), 76708 states have internal predecessors, (88312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76709 states to 76709 states and 88312 transitions. [2022-07-20 22:47:39,452 INFO L78 Accepts]: Start accepts. Automaton has 76709 states and 88312 transitions. Word has length 280 [2022-07-20 22:47:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:39,452 INFO L495 AbstractCegarLoop]: Abstraction has 76709 states and 88312 transitions. [2022-07-20 22:47:39,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 76709 states and 88312 transitions. [2022-07-20 22:47:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-20 22:47:39,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:39,482 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:39,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 22:47:39,482 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:39,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:39,482 INFO L85 PathProgramCache]: Analyzing trace with hash -428999522, now seen corresponding path program 1 times [2022-07-20 22:47:39,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:39,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272020559] [2022-07-20 22:47:39,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:39,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:39,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-20 22:47:39,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:39,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272020559] [2022-07-20 22:47:39,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272020559] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:39,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:39,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:39,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573956590] [2022-07-20 22:47:39,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:39,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:39,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:39,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:39,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:39,758 INFO L87 Difference]: Start difference. First operand 76709 states and 88312 transitions. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:40,887 INFO L93 Difference]: Finished difference Result 159579 states and 184201 transitions. [2022-07-20 22:47:40,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:47:40,888 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2022-07-20 22:47:40,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:40,985 INFO L225 Difference]: With dead ends: 159579 [2022-07-20 22:47:40,985 INFO L226 Difference]: Without dead ends: 84902 [2022-07-20 22:47:41,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:41,037 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 373 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:41,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 86 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:47:41,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84902 states. [2022-07-20 22:47:41,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84902 to 81400. [2022-07-20 22:47:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81400 states, 81399 states have (on average 1.1520043243774494) internal successors, (93772), 81399 states have internal predecessors, (93772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:42,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81400 states to 81400 states and 93772 transitions. [2022-07-20 22:47:42,095 INFO L78 Accepts]: Start accepts. Automaton has 81400 states and 93772 transitions. Word has length 294 [2022-07-20 22:47:42,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:42,095 INFO L495 AbstractCegarLoop]: Abstraction has 81400 states and 93772 transitions. [2022-07-20 22:47:42,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:42,096 INFO L276 IsEmpty]: Start isEmpty. Operand 81400 states and 93772 transitions. [2022-07-20 22:47:42,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-20 22:47:42,123 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:42,123 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:42,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 22:47:42,123 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:42,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1433879905, now seen corresponding path program 1 times [2022-07-20 22:47:42,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:42,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910831228] [2022-07-20 22:47:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:42,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-20 22:47:42,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:42,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910831228] [2022-07-20 22:47:42,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910831228] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:42,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:42,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:42,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543124170] [2022-07-20 22:47:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:42,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:42,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:42,193 INFO L87 Difference]: Start difference. First operand 81400 states and 93772 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:43,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:43,250 INFO L93 Difference]: Finished difference Result 181528 states and 209177 transitions. [2022-07-20 22:47:43,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:43,250 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-07-20 22:47:43,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:43,382 INFO L225 Difference]: With dead ends: 181528 [2022-07-20 22:47:43,382 INFO L226 Difference]: Without dead ends: 102160 [2022-07-20 22:47:43,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:43,426 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 208 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:43,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 179 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:43,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102160 states. [2022-07-20 22:47:44,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102160 to 102150. [2022-07-20 22:47:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102150 states, 102149 states have (on average 1.1487826606232072) internal successors, (117347), 102149 states have internal predecessors, (117347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:45,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102150 states to 102150 states and 117347 transitions. [2022-07-20 22:47:45,079 INFO L78 Accepts]: Start accepts. Automaton has 102150 states and 117347 transitions. Word has length 304 [2022-07-20 22:47:45,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:45,080 INFO L495 AbstractCegarLoop]: Abstraction has 102150 states and 117347 transitions. [2022-07-20 22:47:45,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand 102150 states and 117347 transitions. [2022-07-20 22:47:45,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-07-20 22:47:45,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:45,110 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:45,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 22:47:45,110 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:45,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:45,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1079103819, now seen corresponding path program 1 times [2022-07-20 22:47:45,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:45,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484644692] [2022-07-20 22:47:45,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:45,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-20 22:47:45,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:45,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484644692] [2022-07-20 22:47:45,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484644692] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:45,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:45,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:47:45,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999105854] [2022-07-20 22:47:45,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:45,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:45,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:45,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:45,232 INFO L87 Difference]: Start difference. First operand 102150 states and 117347 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:46,038 INFO L93 Difference]: Finished difference Result 179901 states and 206547 transitions. [2022-07-20 22:47:46,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:46,039 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 337 [2022-07-20 22:47:46,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:46,179 INFO L225 Difference]: With dead ends: 179901 [2022-07-20 22:47:46,179 INFO L226 Difference]: Without dead ends: 102151 [2022-07-20 22:47:46,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:46,237 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:46,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 150 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-20 22:47:46,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102151 states. [2022-07-20 22:47:47,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102151 to 102150. [2022-07-20 22:47:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102150 states, 102149 states have (on average 1.1487043436548572) internal successors, (117339), 102149 states have internal predecessors, (117339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102150 states to 102150 states and 117339 transitions. [2022-07-20 22:47:47,833 INFO L78 Accepts]: Start accepts. Automaton has 102150 states and 117339 transitions. Word has length 337 [2022-07-20 22:47:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:47,834 INFO L495 AbstractCegarLoop]: Abstraction has 102150 states and 117339 transitions. [2022-07-20 22:47:47,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 102150 states and 117339 transitions. [2022-07-20 22:47:47,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-20 22:47:47,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:47,871 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:47,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-20 22:47:47,871 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:47,872 INFO L85 PathProgramCache]: Analyzing trace with hash 251001855, now seen corresponding path program 1 times [2022-07-20 22:47:47,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:47,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620849310] [2022-07-20 22:47:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:47,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:48,001 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 213 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-20 22:47:48,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:48,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620849310] [2022-07-20 22:47:48,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620849310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:48,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905766329] [2022-07-20 22:47:48,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:48,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:48,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:48,004 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) [2022-07-20 22:47:48,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:47:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:48,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:48,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-20 22:47:48,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:48,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905766329] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:48,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:48,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-20 22:47:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245484836] [2022-07-20 22:47:48,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:48,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:48,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:48,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:48,401 INFO L87 Difference]: Start difference. First operand 102150 states and 117339 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:49,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:49,618 INFO L93 Difference]: Finished difference Result 199204 states and 229907 transitions. [2022-07-20 22:47:49,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:49,618 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-07-20 22:47:49,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:49,785 INFO L225 Difference]: With dead ends: 199204 [2022-07-20 22:47:49,785 INFO L226 Difference]: Without dead ends: 121454 [2022-07-20 22:47:49,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:49,841 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 98 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:49,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 292 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121454 states. [2022-07-20 22:47:51,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121454 to 117375. [2022-07-20 22:47:51,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117375 states, 117374 states have (on average 1.155801114386491) internal successors, (135661), 117374 states have internal predecessors, (135661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117375 states to 117375 states and 135661 transitions. [2022-07-20 22:47:51,747 INFO L78 Accepts]: Start accepts. Automaton has 117375 states and 135661 transitions. Word has length 345 [2022-07-20 22:47:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:51,747 INFO L495 AbstractCegarLoop]: Abstraction has 117375 states and 135661 transitions. [2022-07-20 22:47:51,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 117375 states and 135661 transitions. [2022-07-20 22:47:51,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-07-20 22:47:51,784 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:51,784 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:51,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:51,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:51,986 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:51,986 INFO L85 PathProgramCache]: Analyzing trace with hash 451988262, now seen corresponding path program 1 times [2022-07-20 22:47:51,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:51,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276946591] [2022-07-20 22:47:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:51,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:52,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:52,098 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-20 22:47:52,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:52,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276946591] [2022-07-20 22:47:52,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276946591] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:47:52,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134105833] [2022-07-20 22:47:52,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:52,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:52,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:47:52,101 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) [2022-07-20 22:47:52,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:47:52,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:52,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 22:47:52,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:47:52,306 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-20 22:47:52,306 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:47:52,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134105833] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:52,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:47:52,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-20 22:47:52,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463119022] [2022-07-20 22:47:52,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:52,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:52,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:52,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:52,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:52,308 INFO L87 Difference]: Start difference. First operand 117375 states and 135661 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:53,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:53,636 INFO L93 Difference]: Finished difference Result 257980 states and 298859 transitions. [2022-07-20 22:47:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:53,636 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 365 [2022-07-20 22:47:53,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:53,827 INFO L225 Difference]: With dead ends: 257980 [2022-07-20 22:47:53,827 INFO L226 Difference]: Without dead ends: 143449 [2022-07-20 22:47:53,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-20 22:47:53,875 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 202 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:53,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 101 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:53,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143449 states. [2022-07-20 22:47:55,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143449 to 129792. [2022-07-20 22:47:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129792 states, 129791 states have (on average 1.1417894923376815) internal successors, (148194), 129791 states have internal predecessors, (148194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:56,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129792 states to 129792 states and 148194 transitions. [2022-07-20 22:47:56,049 INFO L78 Accepts]: Start accepts. Automaton has 129792 states and 148194 transitions. Word has length 365 [2022-07-20 22:47:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:56,049 INFO L495 AbstractCegarLoop]: Abstraction has 129792 states and 148194 transitions. [2022-07-20 22:47:56,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 129792 states and 148194 transitions. [2022-07-20 22:47:56,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-07-20 22:47:56,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:56,085 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:56,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:47:56,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:47:56,286 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:56,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:56,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1260477996, now seen corresponding path program 1 times [2022-07-20 22:47:56,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:56,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094010423] [2022-07-20 22:47:56,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:56,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-20 22:47:56,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:56,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094010423] [2022-07-20 22:47:56,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094010423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:56,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:56,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:56,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114181363] [2022-07-20 22:47:56,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:56,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:47:56,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:56,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:47:56,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:56,436 INFO L87 Difference]: Start difference. First operand 129792 states and 148194 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:47:57,459 INFO L93 Difference]: Finished difference Result 228067 states and 260839 transitions. [2022-07-20 22:47:57,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:47:57,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 382 [2022-07-20 22:47:57,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:47:57,586 INFO L225 Difference]: With dead ends: 228067 [2022-07-20 22:47:57,586 INFO L226 Difference]: Without dead ends: 98277 [2022-07-20 22:47:57,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 22:47:57,662 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 88 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-20 22:47:57,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 379 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-20 22:47:58,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98277 states. [2022-07-20 22:47:59,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98277 to 90754. [2022-07-20 22:47:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90754 states, 90753 states have (on average 1.0779147796767048) internal successors, (97824), 90753 states have internal predecessors, (97824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:59,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90754 states to 90754 states and 97824 transitions. [2022-07-20 22:47:59,171 INFO L78 Accepts]: Start accepts. Automaton has 90754 states and 97824 transitions. Word has length 382 [2022-07-20 22:47:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:47:59,172 INFO L495 AbstractCegarLoop]: Abstraction has 90754 states and 97824 transitions. [2022-07-20 22:47:59,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:47:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 90754 states and 97824 transitions. [2022-07-20 22:47:59,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-07-20 22:47:59,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:47:59,203 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:47:59,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-20 22:47:59,204 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:47:59,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:47:59,204 INFO L85 PathProgramCache]: Analyzing trace with hash 798316484, now seen corresponding path program 1 times [2022-07-20 22:47:59,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:47:59,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897995330] [2022-07-20 22:47:59,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:47:59,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:47:59,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:47:59,350 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-20 22:47:59,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:47:59,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897995330] [2022-07-20 22:47:59,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897995330] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:47:59,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:47:59,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 22:47:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856337829] [2022-07-20 22:47:59,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:47:59,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:47:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:47:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:47:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:47:59,353 INFO L87 Difference]: Start difference. First operand 90754 states and 97824 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:00,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:00,517 INFO L93 Difference]: Finished difference Result 211215 states and 227643 transitions. [2022-07-20 22:48:00,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:48:00,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 400 [2022-07-20 22:48:00,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:01,000 INFO L225 Difference]: With dead ends: 211215 [2022-07-20 22:48:01,000 INFO L226 Difference]: Without dead ends: 125135 [2022-07-20 22:48:01,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:01,039 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 340 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:01,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 405 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-20 22:48:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125135 states. [2022-07-20 22:48:02,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125135 to 119440. [2022-07-20 22:48:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119440 states, 119439 states have (on average 1.076733730188632) internal successors, (128604), 119439 states have internal predecessors, (128604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:02,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119440 states to 119440 states and 128604 transitions. [2022-07-20 22:48:02,599 INFO L78 Accepts]: Start accepts. Automaton has 119440 states and 128604 transitions. Word has length 400 [2022-07-20 22:48:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:48:02,599 INFO L495 AbstractCegarLoop]: Abstraction has 119440 states and 128604 transitions. [2022-07-20 22:48:02,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 119440 states and 128604 transitions. [2022-07-20 22:48:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-20 22:48:02,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:48:02,630 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:48:02,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-20 22:48:02,630 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:48:02,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:48:02,631 INFO L85 PathProgramCache]: Analyzing trace with hash -486918447, now seen corresponding path program 1 times [2022-07-20 22:48:02,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:48:02,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023002781] [2022-07-20 22:48:02,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:02,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:48:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 298 proven. 12 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-20 22:48:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:48:02,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023002781] [2022-07-20 22:48:02,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023002781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:48:02,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138876515] [2022-07-20 22:48:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:48:02,769 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:48:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:48:02,770 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) [2022-07-20 22:48:02,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:48:02,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:48:02,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 22:48:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:48:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-20 22:48:03,107 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 22:48:03,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138876515] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:48:03,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 22:48:03,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-07-20 22:48:03,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507681326] [2022-07-20 22:48:03,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:48:03,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 22:48:03,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:48:03,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 22:48:03,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:03,109 INFO L87 Difference]: Start difference. First operand 119440 states and 128604 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:48:04,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:48:04,380 INFO L93 Difference]: Finished difference Result 239533 states and 258096 transitions. [2022-07-20 22:48:04,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 22:48:04,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2022-07-20 22:48:04,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:48:04,533 INFO L225 Difference]: With dead ends: 239533 [2022-07-20 22:48:04,533 INFO L226 Difference]: Without dead ends: 122124 [2022-07-20 22:48:04,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:48:04,604 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 136 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-20 22:48:04,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 349 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-20 22:48:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122124 states.