./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.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 c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:16:36,991 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:16:36,992 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:16:37,025 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:16:37,026 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:16:37,027 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:16:37,029 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:16:37,033 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:16:37,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:16:37,039 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:16:37,040 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:16:37,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:16:37,042 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:16:37,044 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:16:37,046 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:16:37,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:16:37,049 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:16:37,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:16:37,052 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:16:37,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:16:37,059 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:16:37,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:16:37,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:16:37,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:16:37,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:16:37,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:16:37,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:16:37,070 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:16:37,071 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:16:37,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:16:37,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:16:37,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:16:37,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:16:37,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:16:37,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:16:37,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:16:37,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:16:37,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:16:37,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:16:37,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:16:37,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:16:37,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:16:37,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:16:37,115 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:16:37,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:16:37,116 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:16:37,116 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:16:37,117 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:16:37,117 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:16:37,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:16:37,118 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:16:37,118 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:16:37,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:16:37,119 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:16:37,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:16:37,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:16:37,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:16:37,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:16:37,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:16:37,121 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:16:37,121 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:16:37,121 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:16:37,121 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:16:37,122 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:16:37,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:16:37,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:16:37,122 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:16:37,122 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:16:37,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:16:37,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:16:37,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:16:37,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:16:37,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:16:37,124 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:16:37,124 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:16:37,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:16:37,125 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c6e51ff8c9564e836040d6d35580386edd1169ec75010fdbf7c4eee4bc9fc430 [2022-07-19 15:16:37,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:16:37,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:16:37,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:16:37,377 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:16:37,379 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:16:37,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2022-07-19 15:16:37,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57beafbf3/8c1b9029280d40548882963534c6ac22/FLAGdf9b65616 [2022-07-19 15:16:37,800 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:16:37,801 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_9.c [2022-07-19 15:16:37,804 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57beafbf3/8c1b9029280d40548882963534c6ac22/FLAGdf9b65616 [2022-07-19 15:16:38,226 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57beafbf3/8c1b9029280d40548882963534c6ac22 [2022-07-19 15:16:38,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:16:38,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:16:38,236 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:16:38,236 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:16:38,239 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:16:38,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cc4d142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38, skipping insertion in model container [2022-07-19 15:16:38,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,245 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:16:38,254 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:16:38,352 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/loops-crafted-1/mono-crafted_9.c[318,331] [2022-07-19 15:16:38,376 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:16:38,383 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:16:38,391 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/loops-crafted-1/mono-crafted_9.c[318,331] [2022-07-19 15:16:38,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:16:38,402 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:16:38,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38 WrapperNode [2022-07-19 15:16:38,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:16:38,403 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:16:38,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:16:38,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:16:38,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,425 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 28 [2022-07-19 15:16:38,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:16:38,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:16:38,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:16:38,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:16:38,434 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,434 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,435 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,435 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,439 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,452 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,454 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:16:38,455 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:16:38,455 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:16:38,455 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:16:38,456 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (1/1) ... [2022-07-19 15:16:38,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:16:38,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:38,487 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 15:16:38,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 15:16:38,526 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:16:38,527 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:16:38,527 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:16:38,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:16:38,566 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:16:38,567 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:16:38,627 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:16:38,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:16:38,632 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 15:16:38,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:16:38 BoogieIcfgContainer [2022-07-19 15:16:38,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:16:38,635 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:16:38,635 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:16:38,641 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:16:38,642 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:16:38" (1/3) ... [2022-07-19 15:16:38,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7c1798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:16:38, skipping insertion in model container [2022-07-19 15:16:38,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:16:38" (2/3) ... [2022-07-19 15:16:38,643 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d7c1798 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:16:38, skipping insertion in model container [2022-07-19 15:16:38,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:16:38" (3/3) ... [2022-07-19 15:16:38,645 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-07-19 15:16:38,657 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:16:38,658 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:16:38,698 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:16:38,704 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@3c80831f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@70ba267b [2022-07-19 15:16:38,704 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:16:38,708 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 15:16:38,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:38,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 15:16:38,721 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:38,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:38,725 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2022-07-19 15:16:38,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:38,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218719296] [2022-07-19 15:16:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:38,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:38,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:16:38,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:38,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218719296] [2022-07-19 15:16:38,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218719296] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:16:38,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:16:38,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:16:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694735497] [2022-07-19 15:16:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:16:38,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:16:38,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:38,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:16:38,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:16:38,866 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:38,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:38,877 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2022-07-19 15:16:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:16:38,878 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-19 15:16:38,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:38,890 INFO L225 Difference]: With dead ends: 20 [2022-07-19 15:16:38,890 INFO L226 Difference]: Without dead ends: 8 [2022-07-19 15:16:38,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:16:38,895 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:38,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:16:38,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-07-19 15:16:38,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-07-19 15:16:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:38,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-07-19 15:16:38,933 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2022-07-19 15:16:38,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:38,934 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-07-19 15:16:38,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:38,934 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-07-19 15:16:38,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 15:16:38,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:38,935 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 15:16:38,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:16:38,935 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:38,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:38,936 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2022-07-19 15:16:38,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:38,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268972189] [2022-07-19 15:16:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:38,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:16:38,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268972189] [2022-07-19 15:16:38,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268972189] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:16:38,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:16:38,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:16:38,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194265414] [2022-07-19 15:16:38,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:16:38,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:16:38,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:38,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:16:38,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:16:38,982 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:38,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:38,996 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2022-07-19 15:16:38,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:16:38,997 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-19 15:16:38,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:38,997 INFO L225 Difference]: With dead ends: 16 [2022-07-19 15:16:38,998 INFO L226 Difference]: Without dead ends: 10 [2022-07-19 15:16:38,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:16:38,999 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:39,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:16:39,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-19 15:16:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-19 15:16:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-19 15:16:39,003 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2022-07-19 15:16:39,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:39,004 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-19 15:16:39,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-19 15:16:39,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 15:16:39,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:39,005 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:39,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:16:39,005 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:39,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:39,006 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2022-07-19 15:16:39,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:39,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832714898] [2022-07-19 15:16:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:39,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:16:39,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:39,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832714898] [2022-07-19 15:16:39,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832714898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:39,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822457083] [2022-07-19 15:16:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:39,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:39,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:39,069 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:39,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:16:39,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:39,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 15:16:39,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:16:39,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:16:39,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822457083] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:39,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:39,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-19 15:16:39,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590906128] [2022-07-19 15:16:39,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:39,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 15:16:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 15:16:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:16:39,238 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:39,286 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2022-07-19 15:16:39,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:16:39,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 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 8 [2022-07-19 15:16:39,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:39,288 INFO L225 Difference]: With dead ends: 21 [2022-07-19 15:16:39,288 INFO L226 Difference]: Without dead ends: 15 [2022-07-19 15:16:39,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:16:39,290 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:39,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:16:39,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-07-19 15:16:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-07-19 15:16:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-07-19 15:16:39,294 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 8 [2022-07-19 15:16:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:39,295 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-07-19 15:16:39,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-07-19 15:16:39,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 15:16:39,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:39,296 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:39,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:39,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:39,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:39,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:39,508 INFO L85 PathProgramCache]: Analyzing trace with hash 598153473, now seen corresponding path program 1 times [2022-07-19 15:16:39,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:39,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967038171] [2022-07-19 15:16:39,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:39,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:39,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:16:39,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:39,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967038171] [2022-07-19 15:16:39,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967038171] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:39,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192802806] [2022-07-19 15:16:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:39,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:39,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:39,597 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:39,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:16:39,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:39,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 15:16:39,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:16:39,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:39,720 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:16:39,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192802806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:39,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:39,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-19 15:16:39,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232955843] [2022-07-19 15:16:39,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:39,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:16:39,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:39,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:16:39,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:16:39,727 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:39,767 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-07-19 15:16:39,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:16:39,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 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 14 [2022-07-19 15:16:39,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:39,769 INFO L225 Difference]: With dead ends: 32 [2022-07-19 15:16:39,770 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 15:16:39,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:16:39,772 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:39,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 19 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:16:39,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 15:16:39,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 15:16:39,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-19 15:16:39,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2022-07-19 15:16:39,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:39,778 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-19 15:16:39,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:39,778 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-19 15:16:39,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 15:16:39,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:39,779 INFO L195 NwaCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:39,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:39,995 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,SelfDestructingSolverStorable3 [2022-07-19 15:16:39,996 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:39,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:39,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1175196403, now seen corresponding path program 2 times [2022-07-19 15:16:39,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:39,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573141602] [2022-07-19 15:16:39,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:39,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:40,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:40,093 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:16:40,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:40,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573141602] [2022-07-19 15:16:40,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573141602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:40,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471251410] [2022-07-19 15:16:40,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:16:40,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:40,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:40,096 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:40,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:16:40,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:16:40,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:40,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 15:16:40,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:40,171 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:16:40,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:16:40,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471251410] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:40,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:40,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-07-19 15:16:40,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168205006] [2022-07-19 15:16:40,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:40,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 15:16:40,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:40,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 15:16:40,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:16:40,272 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:40,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:40,315 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2022-07-19 15:16:40,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:16:40,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 15:16:40,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:40,317 INFO L225 Difference]: With dead ends: 48 [2022-07-19 15:16:40,317 INFO L226 Difference]: Without dead ends: 39 [2022-07-19 15:16:40,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:16:40,318 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:40,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:16:40,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-19 15:16:40,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-07-19 15:16:40,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-07-19 15:16:40,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 22 [2022-07-19 15:16:40,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:40,325 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-07-19 15:16:40,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 17 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-07-19 15:16:40,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:16:40,326 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:40,327 INFO L195 NwaCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:40,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:40,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:40,544 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:40,544 INFO L85 PathProgramCache]: Analyzing trace with hash -713215707, now seen corresponding path program 3 times [2022-07-19 15:16:40,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:40,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531602959] [2022-07-19 15:16:40,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:40,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:16:40,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531602959] [2022-07-19 15:16:40,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531602959] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:40,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011985354] [2022-07-19 15:16:40,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:16:40,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:40,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:40,768 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:40,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:16:40,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 15:16:40,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:40,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:16:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:40,860 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-07-19 15:16:40,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:40,937 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 70 proven. 4 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-07-19 15:16:40,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011985354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:40,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:40,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-07-19 15:16:40,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126413792] [2022-07-19 15:16:40,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:40,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:16:40,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:40,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:16:40,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:16:40,940 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:41,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:41,009 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-07-19 15:16:41,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:16:41,009 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 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 38 [2022-07-19 15:16:41,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:41,011 INFO L225 Difference]: With dead ends: 58 [2022-07-19 15:16:41,011 INFO L226 Difference]: Without dead ends: 49 [2022-07-19 15:16:41,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:16:41,013 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:41,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:16:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-19 15:16:41,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-07-19 15:16:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 48 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:41,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-07-19 15:16:41,021 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 38 [2022-07-19 15:16:41,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:41,021 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-07-19 15:16:41,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:41,022 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-07-19 15:16:41,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 15:16:41,023 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:41,023 INFO L195 NwaCegarLoop]: trace histogram [21, 15, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:41,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:41,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:41,248 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:41,249 INFO L85 PathProgramCache]: Analyzing trace with hash 160479836, now seen corresponding path program 4 times [2022-07-19 15:16:41,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:41,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862277267] [2022-07-19 15:16:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:41,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 15:16:41,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:41,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862277267] [2022-07-19 15:16:41,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862277267] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:41,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31320838] [2022-07-19 15:16:41,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:16:41,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:41,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:41,456 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:41,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:16:41,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:16:41,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:41,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 15:16:41,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:41,571 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 15:16:41,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 176 proven. 240 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 15:16:41,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31320838] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:41,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:41,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-07-19 15:16:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073276888] [2022-07-19 15:16:41,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:16:41,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:41,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:16:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:16:41,944 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:42,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:42,059 INFO L93 Difference]: Finished difference Result 100 states and 129 transitions. [2022-07-19 15:16:42,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 15:16:42,060 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 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 48 [2022-07-19 15:16:42,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:42,062 INFO L225 Difference]: With dead ends: 100 [2022-07-19 15:16:42,062 INFO L226 Difference]: Without dead ends: 83 [2022-07-19 15:16:42,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:16:42,064 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:42,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:16:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-07-19 15:16:42,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-07-19 15:16:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 82 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 89 transitions. [2022-07-19 15:16:42,080 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 89 transitions. Word has length 48 [2022-07-19 15:16:42,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:42,081 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 89 transitions. [2022-07-19 15:16:42,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.1714285714285713) internal successors, (76), 35 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 89 transitions. [2022-07-19 15:16:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 15:16:42,084 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:42,085 INFO L195 NwaCegarLoop]: trace histogram [38, 32, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:42,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 15:16:42,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:42,300 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 722625007, now seen corresponding path program 5 times [2022-07-19 15:16:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437834100] [2022-07-19 15:16:42,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:42,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:42,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 15:16:42,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437834100] [2022-07-19 15:16:42,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437834100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:42,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378763422] [2022-07-19 15:16:42,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:16:42,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:42,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:42,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:42,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:16:42,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 39 check-sat command(s) [2022-07-19 15:16:42,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:42,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 15:16:42,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 15:16:43,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 363 proven. 1056 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 15:16:44,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378763422] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:44,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:44,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2022-07-19 15:16:44,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065702390] [2022-07-19 15:16:44,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-19 15:16:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:44,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-19 15:16:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 15:16:44,330 INFO L87 Difference]: Start difference. First operand 83 states and 89 transitions. Second operand has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:44,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:44,547 INFO L93 Difference]: Finished difference Result 168 states and 214 transitions. [2022-07-19 15:16:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-19 15:16:44,548 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-19 15:16:44,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:44,549 INFO L225 Difference]: With dead ends: 168 [2022-07-19 15:16:44,549 INFO L226 Difference]: Without dead ends: 151 [2022-07-19 15:16:44,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 15:16:44,551 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:44,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:16:44,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-19 15:16:44,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-07-19 15:16:44,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0466666666666666) internal successors, (157), 150 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:44,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 157 transitions. [2022-07-19 15:16:44,563 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 157 transitions. Word has length 82 [2022-07-19 15:16:44,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:44,563 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 157 transitions. [2022-07-19 15:16:44,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0869565217391304) internal successors, (144), 69 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:44,564 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 157 transitions. [2022-07-19 15:16:44,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-07-19 15:16:44,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:44,565 INFO L195 NwaCegarLoop]: trace histogram [72, 66, 6, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:44,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:44,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:44,788 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:44,789 INFO L85 PathProgramCache]: Analyzing trace with hash -682364203, now seen corresponding path program 6 times [2022-07-19 15:16:44,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:44,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927670818] [2022-07-19 15:16:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:44,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 737 proven. 4422 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 15:16:46,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927670818] [2022-07-19 15:16:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927670818] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634441541] [2022-07-19 15:16:46,443 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:16:46,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:46,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:46,444 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:46,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:16:46,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2022-07-19 15:16:46,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:46,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:16:46,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-07-19 15:16:46,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:47,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 858 proven. 36 refuted. 0 times theorem prover too weak. 4290 trivial. 0 not checked. [2022-07-19 15:16:47,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634441541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:47,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:47,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 9, 9] total 83 [2022-07-19 15:16:47,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462206536] [2022-07-19 15:16:47,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:47,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-19 15:16:47,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:47,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-19 15:16:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2022-07-19 15:16:47,260 INFO L87 Difference]: Start difference. First operand 151 states and 157 transitions. Second operand has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:47,545 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2022-07-19 15:16:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-07-19 15:16:47,545 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 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 150 [2022-07-19 15:16:47,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:47,550 INFO L225 Difference]: With dead ends: 186 [2022-07-19 15:16:47,550 INFO L226 Difference]: Without dead ends: 169 [2022-07-19 15:16:47,552 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2022-07-19 15:16:47,554 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 155 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:47,554 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 15 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:16:47,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-07-19 15:16:47,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-07-19 15:16:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.0892857142857142) internal successors, (183), 168 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) [2022-07-19 15:16:47,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 183 transitions. [2022-07-19 15:16:47,580 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 183 transitions. Word has length 150 [2022-07-19 15:16:47,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:47,581 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 183 transitions. [2022-07-19 15:16:47,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0843373493975905) internal successors, (173), 83 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:47,582 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 183 transitions. [2022-07-19 15:16:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-07-19 15:16:47,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:47,588 INFO L195 NwaCegarLoop]: trace histogram [81, 67, 14, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:47,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:47,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:47,810 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:47,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1511260128, now seen corresponding path program 7 times [2022-07-19 15:16:47,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:47,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303349618] [2022-07-19 15:16:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:47,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:47,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:49,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-19 15:16:49,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303349618] [2022-07-19 15:16:49,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303349618] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633479142] [2022-07-19 15:16:49,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:16:49,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:49,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:49,457 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:49,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:16:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:49,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-19 15:16:49,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-19 15:16:49,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:54,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 1836 proven. 4556 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-19 15:16:54,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633479142] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:54,316 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:54,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2022-07-19 15:16:54,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880916971] [2022-07-19 15:16:54,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:54,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-07-19 15:16:54,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:54,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-07-19 15:16:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-07-19 15:16:54,322 INFO L87 Difference]: Start difference. First operand 169 states and 183 transitions. Second operand has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:54,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:54,704 INFO L93 Difference]: Finished difference Result 340 states and 437 transitions. [2022-07-19 15:16:54,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-07-19 15:16:54,704 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 168 [2022-07-19 15:16:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:54,706 INFO L225 Difference]: With dead ends: 340 [2022-07-19 15:16:54,706 INFO L226 Difference]: Without dead ends: 307 [2022-07-19 15:16:54,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 267 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2022-07-19 15:16:54,710 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:54,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:16:54,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-07-19 15:16:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2022-07-19 15:16:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0490196078431373) internal successors, (321), 306 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 321 transitions. [2022-07-19 15:16:54,722 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 321 transitions. Word has length 168 [2022-07-19 15:16:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:54,723 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 321 transitions. [2022-07-19 15:16:54,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0431654676258995) internal successors, (284), 139 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 321 transitions. [2022-07-19 15:16:54,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-07-19 15:16:54,726 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:54,726 INFO L195 NwaCegarLoop]: trace histogram [150, 136, 14, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:54,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:54,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 15:16:54,948 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:54,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:54,948 INFO L85 PathProgramCache]: Analyzing trace with hash 55731535, now seen corresponding path program 8 times [2022-07-19 15:16:54,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:54,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217061884] [2022-07-19 15:16:54,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:54,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:55,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:17:00,932 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-19 15:17:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:17:00,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217061884] [2022-07-19 15:17:00,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217061884] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:17:00,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193051644] [2022-07-19 15:17:00,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:17:00,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:17:00,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:17:00,934 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:17:00,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:17:01,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:17:01,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:17:01,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 138 conjunts are in the unsatisfiable core [2022-07-19 15:17:01,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:17:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-19 15:17:01,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:17:18,887 INFO L134 CoverageAnalysis]: Checked inductivity of 22500 backedges. 3699 proven. 18632 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-19 15:17:18,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193051644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:17:18,888 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:17:18,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2022-07-19 15:17:18,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507531071] [2022-07-19 15:17:18,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:17:18,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2022-07-19 15:17:18,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:17:18,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2022-07-19 15:17:18,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-07-19 15:17:18,903 INFO L87 Difference]: Start difference. First operand 307 states and 321 transitions. Second operand has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:17:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:17:20,070 INFO L93 Difference]: Finished difference Result 616 states and 782 transitions. [2022-07-19 15:17:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2022-07-19 15:17:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 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 306 [2022-07-19 15:17:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:17:20,073 INFO L225 Difference]: With dead ends: 616 [2022-07-19 15:17:20,073 INFO L226 Difference]: Without dead ends: 583 [2022-07-19 15:17:20,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 22.7s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2022-07-19 15:17:20,078 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:17:20,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:17:20,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-07-19 15:17:20,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 583. [2022-07-19 15:17:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 1.0257731958762886) internal successors, (597), 582 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:17:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 597 transitions. [2022-07-19 15:17:20,094 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 597 transitions. Word has length 306 [2022-07-19 15:17:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:17:20,095 INFO L495 AbstractCegarLoop]: Abstraction has 583 states and 597 transitions. [2022-07-19 15:17:20,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0216606498194944) internal successors, (560), 277 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:17:20,096 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 597 transitions. [2022-07-19 15:17:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 583 [2022-07-19 15:17:20,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:17:20,105 INFO L195 NwaCegarLoop]: trace histogram [288, 274, 14, 1, 1, 1, 1, 1, 1] [2022-07-19 15:17:20,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-07-19 15:17:20,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:17:20,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:17:20,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:17:20,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1666677907, now seen corresponding path program 9 times [2022-07-19 15:17:20,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:17:20,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166454150] [2022-07-19 15:17:20,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:17:20,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:17:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:17:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7425 proven. 75350 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-07-19 15:17:43,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:17:43,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166454150] [2022-07-19 15:17:43,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166454150] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:17:43,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096770692] [2022-07-19 15:17:43,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:17:43,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:17:43,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:17:43,424 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:17:43,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 15:17:43,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2022-07-19 15:17:43,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:17:43,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 15:17:43,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:17:46,141 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-07-19 15:17:46,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:17:48,892 INFO L134 CoverageAnalysis]: Checked inductivity of 82944 backedges. 7946 proven. 196 refuted. 0 times theorem prover too weak. 74802 trivial. 0 not checked. [2022-07-19 15:17:48,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096770692] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:17:48,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:17:48,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 17, 17] total 307 [2022-07-19 15:17:48,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998148364] [2022-07-19 15:17:48,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:17:48,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 307 states [2022-07-19 15:17:48,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:17:48,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 307 interpolants. [2022-07-19 15:17:48,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2022-07-19 15:17:48,907 INFO L87 Difference]: Start difference. First operand 583 states and 597 transitions. Second operand has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:17:51,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:17:51,713 INFO L93 Difference]: Finished difference Result 650 states and 711 transitions. [2022-07-19 15:17:51,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 307 states. [2022-07-19 15:17:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 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 582 [2022-07-19 15:17:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:17:51,716 INFO L225 Difference]: With dead ends: 650 [2022-07-19 15:17:51,716 INFO L226 Difference]: Without dead ends: 617 [2022-07-19 15:17:51,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1439 GetRequests, 1134 SyntacticMatches, 0 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=46971, Invalid=46971, Unknown=0, NotChecked=0, Total=93942 [2022-07-19 15:17:51,720 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 595 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 1554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1554 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:17:51,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 27 Invalid, 2188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1554 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:17:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-07-19 15:17:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2022-07-19 15:17:51,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 616 states have (on average 1.0503246753246753) internal successors, (647), 616 states have internal predecessors, (647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:17:51,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 647 transitions. [2022-07-19 15:17:51,740 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 647 transitions. Word has length 582 [2022-07-19 15:17:51,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:17:51,741 INFO L495 AbstractCegarLoop]: Abstraction has 617 states and 647 transitions. [2022-07-19 15:17:51,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 307 states, 307 states have (on average 2.022801302931596) internal successors, (621), 307 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:17:51,742 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 647 transitions. [2022-07-19 15:17:51,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 617 [2022-07-19 15:17:51,752 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:17:51,753 INFO L195 NwaCegarLoop]: trace histogram [305, 275, 30, 1, 1, 1, 1, 1, 1] [2022-07-19 15:17:51,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 15:17:51,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 15:17:51,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:17:51,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:17:51,972 INFO L85 PathProgramCache]: Analyzing trace with hash 122564320, now seen corresponding path program 10 times [2022-07-19 15:17:51,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:17:51,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767512516] [2022-07-19 15:17:51,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:17:51,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:17:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:18:15,137 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-07-19 15:18:15,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:18:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767512516] [2022-07-19 15:18:15,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767512516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:18:15,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320953135] [2022-07-19 15:18:15,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:18:15,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:18:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:18:15,139 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:18:15,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 15:18:15,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:18:15,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:18:15,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 1317 conjuncts, 277 conjunts are in the unsatisfiable core [2022-07-19 15:18:15,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:18:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-07-19 15:18:15,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:19:25,317 INFO L134 CoverageAnalysis]: Checked inductivity of 93025 backedges. 16284 proven. 75900 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2022-07-19 15:19:25,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320953135] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:19:25,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:19:25,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2022-07-19 15:19:25,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091058909] [2022-07-19 15:19:25,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:19:25,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2022-07-19 15:19:25,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:19:25,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2022-07-19 15:19:25,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-07-19 15:19:25,357 INFO L87 Difference]: Start difference. First operand 617 states and 647 transitions. Second operand has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:19:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:19:32,162 INFO L93 Difference]: Finished difference Result 1236 states and 1573 transitions. [2022-07-19 15:19:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2022-07-19 15:19:32,163 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 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 616 [2022-07-19 15:19:32,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:19:32,168 INFO L225 Difference]: With dead ends: 1236 [2022-07-19 15:19:32,168 INFO L226 Difference]: Without dead ends: 1171 [2022-07-19 15:19:32,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1508 GetRequests, 955 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 91.1s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2022-07-19 15:19:32,187 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 1127 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:19:32,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1127 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:19:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2022-07-19 15:19:32,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 1171. [2022-07-19 15:19:32,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 1.0264957264957264) internal successors, (1201), 1170 states have internal predecessors, (1201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:19:32,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 1201 transitions. [2022-07-19 15:19:32,220 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 1201 transitions. Word has length 616 [2022-07-19 15:19:32,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:19:32,220 INFO L495 AbstractCegarLoop]: Abstraction has 1171 states and 1201 transitions. [2022-07-19 15:19:32,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0108108108108107) internal successors, (1116), 555 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:19:32,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 1201 transitions. [2022-07-19 15:19:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1171 [2022-07-19 15:19:32,232 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:19:32,233 INFO L195 NwaCegarLoop]: trace histogram [582, 552, 30, 1, 1, 1, 1, 1, 1] [2022-07-19 15:19:32,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-19 15:19:32,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 15:19:32,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:19:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:19:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1917501825, now seen corresponding path program 11 times [2022-07-19 15:19:32,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:19:32,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468727180] [2022-07-19 15:19:32,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:19:32,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:19:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat