./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/half_2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/half_2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:03:49,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:03:49,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:03:49,327 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:03:49,327 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:03:49,328 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:03:49,331 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:03:49,333 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:03:49,334 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:03:49,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:03:49,339 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:03:49,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:03:49,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:03:49,343 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:03:49,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:03:49,347 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:03:49,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:03:49,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:03:49,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:03:49,355 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:03:49,357 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:03:49,357 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:03:49,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:03:49,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:03:49,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:03:49,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:03:49,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:03:49,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:03:49,367 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:03:49,368 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:03:49,369 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:03:49,369 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:03:49,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:03:49,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:03:49,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:03:49,372 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:03:49,372 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:03:49,373 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:03:49,373 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:03:49,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:03:49,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:03:49,376 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:03:49,377 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:03:49,407 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:03:49,407 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:03:49,408 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:03:49,408 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:03:49,408 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:03:49,409 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:03:49,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:03:49,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:03:49,409 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:03:49,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:03:49,411 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:03:49,411 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:03:49,411 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:03:49,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:03:49,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:03:49,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:03:49,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:03:49,412 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:03:49,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:03:49,413 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:03:49,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:03:49,414 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:03:49,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:03:49,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:03:49,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:03:49,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:03:49,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:03:49,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:03:49,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:03:49,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:03:49,415 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:03:49,415 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:03:49,416 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:03:49,416 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 [2022-07-19 15:03:49,634 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:03:49,656 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:03:49,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:03:49,659 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:03:49,659 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:03:49,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/half_2.i [2022-07-19 15:03:49,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35e11add6/27be7606cf074c41814fba7ad11c9aea/FLAGd9bf052c6 [2022-07-19 15:03:50,066 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:03:50,066 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/half_2.i [2022-07-19 15:03:50,070 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35e11add6/27be7606cf074c41814fba7ad11c9aea/FLAGd9bf052c6 [2022-07-19 15:03:50,494 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35e11add6/27be7606cf074c41814fba7ad11c9aea [2022-07-19 15:03:50,497 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:03:50,498 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:03:50,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:03:50,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:03:50,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:03:50,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63212f28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50, skipping insertion in model container [2022-07-19 15:03:50,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:03:50,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:03:50,650 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/loop-invgen/half_2.i[893,906] [2022-07-19 15:03:50,661 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:03:50,667 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:03:50,676 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/loop-invgen/half_2.i[893,906] [2022-07-19 15:03:50,679 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:03:50,688 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:03:50,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50 WrapperNode [2022-07-19 15:03:50,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:03:50,689 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:03:50,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:03:50,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:03:50,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,698 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,710 INFO L137 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 48 [2022-07-19 15:03:50,710 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:03:50,711 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:03:50,711 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:03:50,711 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:03:50,716 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,717 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,717 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,719 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,722 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,723 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:03:50,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:03:50,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:03:50,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:03:50,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (1/1) ... [2022-07-19 15:03:50,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:03:50,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:50,765 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 15:03:50,786 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 15:03:50,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:03:50,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:03:50,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:03:50,810 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:03:50,852 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:03:50,853 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:03:50,932 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:03:50,937 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:03:50,937 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 15:03:50,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:03:50 BoogieIcfgContainer [2022-07-19 15:03:50,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:03:50,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:03:50,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:03:50,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:03:50,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:03:50" (1/3) ... [2022-07-19 15:03:50,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b07860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:03:50, skipping insertion in model container [2022-07-19 15:03:50,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:03:50" (2/3) ... [2022-07-19 15:03:50,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37b07860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:03:50, skipping insertion in model container [2022-07-19 15:03:50,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:03:50" (3/3) ... [2022-07-19 15:03:50,961 INFO L111 eAbstractionObserver]: Analyzing ICFG half_2.i [2022-07-19 15:03:50,973 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:03:50,974 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:03:51,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:03:51,038 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@643a821f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1afaea8c [2022-07-19 15:03:51,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:03:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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 15:03:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 15:03:51,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:51,057 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:51,057 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:51,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:51,069 INFO L85 PathProgramCache]: Analyzing trace with hash 185205049, now seen corresponding path program 1 times [2022-07-19 15:03:51,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:51,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226349218] [2022-07-19 15:03:51,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:51,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:51,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:51,216 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 15:03:51,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:51,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226349218] [2022-07-19 15:03:51,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226349218] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:03:51,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:03:51,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:03:51,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139933493] [2022-07-19 15:03:51,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:03:51,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:03:51,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:51,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:03:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:03:51,257 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 13 states have internal predecessors, (19), 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 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 15:03:51,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:51,269 INFO L93 Difference]: Finished difference Result 24 states and 31 transitions. [2022-07-19 15:03:51,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:03:51,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 15:03:51,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:51,278 INFO L225 Difference]: With dead ends: 24 [2022-07-19 15:03:51,278 INFO L226 Difference]: Without dead ends: 10 [2022-07-19 15:03:51,282 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 15:03:51,285 INFO L413 NwaCegarLoop]: 16 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, 16 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 15:03:51,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:03:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2022-07-19 15:03:51,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2022-07-19 15:03:51,313 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 15:03:51,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2022-07-19 15:03:51,315 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2022-07-19 15:03:51,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:51,315 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2022-07-19 15:03:51,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 15:03:51,316 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2022-07-19 15:03:51,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-19 15:03:51,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:51,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:51,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:03:51,318 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:51,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:51,319 INFO L85 PathProgramCache]: Analyzing trace with hash 181510965, now seen corresponding path program 1 times [2022-07-19 15:03:51,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:51,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416950650] [2022-07-19 15:03:51,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:51,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:51,487 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 15:03:51,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:51,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416950650] [2022-07-19 15:03:51,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416950650] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:03:51,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:03:51,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 15:03:51,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762636043] [2022-07-19 15:03:51,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:03:51,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:03:51,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:51,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:03:51,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:03:51,491 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 15:03:51,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:51,549 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2022-07-19 15:03:51,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:03:51,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 15:03:51,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:51,550 INFO L225 Difference]: With dead ends: 18 [2022-07-19 15:03:51,550 INFO L226 Difference]: Without dead ends: 16 [2022-07-19 15:03:51,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-07-19 15:03:51,552 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:51,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 17 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:03:51,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-19 15:03:51,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2022-07-19 15:03:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 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 15:03:51,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-07-19 15:03:51,557 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2022-07-19 15:03:51,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:51,557 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-07-19 15:03:51,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 15:03:51,558 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-07-19 15:03:51,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-19 15:03:51,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:51,559 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:51,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:03:51,559 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:51,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:51,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1383318765, now seen corresponding path program 1 times [2022-07-19 15:03:51,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:51,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74991424] [2022-07-19 15:03:51,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:51,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:51,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:51,657 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 15:03:51,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74991424] [2022-07-19 15:03:51,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74991424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:51,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404047754] [2022-07-19 15:03:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:51,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:51,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:51,670 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 15:03:51,709 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 15:03:51,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:03:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:03:51,945 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 15:03:51,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:03:52,079 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 15:03:52,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404047754] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:03:52,081 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:03:52,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-07-19 15:03:52,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240860455] [2022-07-19 15:03:52,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:03:52,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 15:03:52,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:52,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 15:03:52,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:03:52,086 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 15:03:52,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:52,499 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-07-19 15:03:52,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 15:03:52,500 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 9 [2022-07-19 15:03:52,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:52,501 INFO L225 Difference]: With dead ends: 41 [2022-07-19 15:03:52,501 INFO L226 Difference]: Without dead ends: 39 [2022-07-19 15:03:52,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=447, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:03:52,502 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:52,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:03:52,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-19 15:03:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 20. [2022-07-19 15:03:52,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 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 15:03:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-07-19 15:03:52,509 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-07-19 15:03:52,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:52,509 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-07-19 15:03:52,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5833333333333333) internal successors, (19), 12 states have internal predecessors, (19), 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 15:03:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-07-19 15:03:52,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 15:03:52,510 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:52,510 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:52,537 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 15:03:52,734 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 15:03:52,734 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:52,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:52,735 INFO L85 PathProgramCache]: Analyzing trace with hash -424251923, now seen corresponding path program 2 times [2022-07-19 15:03:52,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:52,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358306482] [2022-07-19 15:03:52,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:52,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:52,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:52,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358306482] [2022-07-19 15:03:52,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358306482] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:52,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246415212] [2022-07-19 15:03:52,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:03:52,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:52,811 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 15:03:52,879 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 15:03:52,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:03:52,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:03:52,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:03:52,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:03:52,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:52,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:03:53,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:53,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246415212] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:03:53,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:03:53,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2022-07-19 15:03:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764010821] [2022-07-19 15:03:53,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:03:53,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 15:03:53,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 15:03:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:03:53,089 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 15:03:53,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:53,394 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-07-19 15:03:53,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 15:03:53,395 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 11 [2022-07-19 15:03:53,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:53,398 INFO L225 Difference]: With dead ends: 51 [2022-07-19 15:03:53,398 INFO L226 Difference]: Without dead ends: 49 [2022-07-19 15:03:53,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:03:53,403 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 55 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:53,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 85 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:03:53,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-19 15:03:53,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 19. [2022-07-19 15:03:53,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 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 15:03:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-07-19 15:03:53,416 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2022-07-19 15:03:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:53,417 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-07-19 15:03:53,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 15:03:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-07-19 15:03:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 15:03:53,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:53,418 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:53,445 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 15:03:53,631 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 15:03:53,632 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:53,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:53,632 INFO L85 PathProgramCache]: Analyzing trace with hash 34157897, now seen corresponding path program 1 times [2022-07-19 15:03:53,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:53,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727196675] [2022-07-19 15:03:53,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:53,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:53,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:53,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:53,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:53,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727196675] [2022-07-19 15:03:53,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727196675] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:53,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869410211] [2022-07-19 15:03:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:53,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:53,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:53,729 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 15:03:53,731 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 15:03:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:53,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 15:03:53,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:03:53,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:53,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:03:53,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869410211] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:03:53,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:03:53,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2022-07-19 15:03:53,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892867962] [2022-07-19 15:03:53,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:03:53,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:03:53,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:03:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:03:53,795 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 15:03:53,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:53,835 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2022-07-19 15:03:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:03:53,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) Word has length 11 [2022-07-19 15:03:53,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:53,838 INFO L225 Difference]: With dead ends: 27 [2022-07-19 15:03:53,838 INFO L226 Difference]: Without dead ends: 19 [2022-07-19 15:03:53,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:03:53,839 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:53,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 24 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:03:53,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-19 15:03:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-19 15:03:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 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 15:03:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-07-19 15:03:53,849 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 11 [2022-07-19 15:03:53,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:53,849 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-07-19 15:03:53,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 15:03:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-07-19 15:03:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-19 15:03:53,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:53,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:53,879 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 15:03:54,067 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 15:03:54,068 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:54,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1874485687, now seen corresponding path program 1 times [2022-07-19 15:03:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:54,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394211739] [2022-07-19 15:03:54,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:54,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:54,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:54,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:54,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394211739] [2022-07-19 15:03:54,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394211739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:54,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368355923] [2022-07-19 15:03:54,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:54,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:54,224 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 15:03:54,225 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 15:03:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:54,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 15:03:54,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:03:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:54,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:03:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:54,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368355923] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:03:54,587 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:03:54,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-07-19 15:03:54,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264067885] [2022-07-19 15:03:54,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:03:54,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 15:03:54,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:54,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 15:03:54,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:03:54,589 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 15:03:55,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:55,099 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2022-07-19 15:03:55,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:03:55,100 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 13 [2022-07-19 15:03:55,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:55,100 INFO L225 Difference]: With dead ends: 47 [2022-07-19 15:03:55,100 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 15:03:55,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=240, Invalid=882, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 15:03:55,102 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:55,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 42 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:03:55,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 15:03:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2022-07-19 15:03:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 15:03:55,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-07-19 15:03:55,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-07-19 15:03:55,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:55,109 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-07-19 15:03:55,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 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 15:03:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-07-19 15:03:55,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 15:03:55,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:55,110 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:55,135 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 15:03:55,328 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 15:03:55,328 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:55,329 INFO L85 PathProgramCache]: Analyzing trace with hash -17212563, now seen corresponding path program 2 times [2022-07-19 15:03:55,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:55,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851905815] [2022-07-19 15:03:55,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:55,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:55,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:55,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:55,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851905815] [2022-07-19 15:03:55,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851905815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:55,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676402786] [2022-07-19 15:03:55,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:03:55,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:55,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:55,519 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 15:03:55,529 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 15:03:55,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:03:55,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:03:55,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 15:03:55,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:03:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:55,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:03:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:55,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676402786] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:03:55,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:03:55,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2022-07-19 15:03:55,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472583626] [2022-07-19 15:03:55,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:03:55,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:03:55,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:55,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:03:55,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:03:55,992 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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 15:03:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:56,619 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-07-19 15:03:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 15:03:56,620 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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) Word has length 17 [2022-07-19 15:03:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:56,620 INFO L225 Difference]: With dead ends: 49 [2022-07-19 15:03:56,621 INFO L226 Difference]: Without dead ends: 34 [2022-07-19 15:03:56,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=297, Invalid=1343, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:03:56,622 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 61 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:56,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:03:56,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-07-19 15:03:56,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-07-19 15:03:56,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 15:03:56,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-19 15:03:56,631 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 17 [2022-07-19 15:03:56,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:56,632 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-19 15:03:56,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 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 15:03:56,632 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-19 15:03:56,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 15:03:56,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:56,633 INFO L195 NwaCegarLoop]: trace histogram [7, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:56,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:03:56,847 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 15:03:56,848 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:56,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:56,848 INFO L85 PathProgramCache]: Analyzing trace with hash 38169965, now seen corresponding path program 3 times [2022-07-19 15:03:56,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:56,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564792169] [2022-07-19 15:03:56,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:56,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:56,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:56,950 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:56,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:56,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564792169] [2022-07-19 15:03:56,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564792169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:56,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702202669] [2022-07-19 15:03:56,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:03:56,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:56,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:56,956 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 15:03:56,963 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 15:03:56,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 15:03:56,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:03:56,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 15:03:56,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:03:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:57,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:03:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:57,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702202669] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:03:57,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:03:57,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 31 [2022-07-19 15:03:57,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186083793] [2022-07-19 15:03:57,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:03:57,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 15:03:57,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:57,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 15:03:57,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-07-19 15:03:57,338 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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 15:03:57,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:57,874 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2022-07-19 15:03:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 15:03:57,874 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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 21 [2022-07-19 15:03:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:57,875 INFO L225 Difference]: With dead ends: 82 [2022-07-19 15:03:57,875 INFO L226 Difference]: Without dead ends: 80 [2022-07-19 15:03:57,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=750, Invalid=2220, Unknown=0, NotChecked=0, Total=2970 [2022-07-19 15:03:57,877 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 103 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:57,877 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 105 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:03:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-07-19 15:03:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 37. [2022-07-19 15:03:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 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 15:03:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2022-07-19 15:03:57,894 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 21 [2022-07-19 15:03:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:57,894 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2022-07-19 15:03:57,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 31 states have internal predecessors, (48), 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 15:03:57,895 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2022-07-19 15:03:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 15:03:57,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:57,895 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:57,923 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 15:03:58,115 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 15:03:58,116 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:58,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:58,116 INFO L85 PathProgramCache]: Analyzing trace with hash -756727863, now seen corresponding path program 4 times [2022-07-19 15:03:58,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:58,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171374184] [2022-07-19 15:03:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:58,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:58,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:58,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:58,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171374184] [2022-07-19 15:03:58,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171374184] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:58,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26492494] [2022-07-19 15:03:58,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:03:58,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:58,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:58,331 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 15:03:58,352 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 15:03:58,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:03:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:03:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 15:03:58,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:03:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:58,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:03:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:58,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26492494] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:03:58,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:03:58,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-07-19 15:03:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509282352] [2022-07-19 15:03:58,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:03:58,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 15:03:58,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:03:58,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 15:03:58,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2022-07-19 15:03:58,999 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 15:03:59,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:03:59,385 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-07-19 15:03:59,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 15:03:59,385 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 21 [2022-07-19 15:03:59,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:03:59,386 INFO L225 Difference]: With dead ends: 56 [2022-07-19 15:03:59,386 INFO L226 Difference]: Without dead ends: 38 [2022-07-19 15:03:59,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=260, Invalid=1300, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 15:03:59,388 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 25 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:03:59,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 46 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:03:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-19 15:03:59,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-07-19 15:03:59,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 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 15:03:59,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-07-19 15:03:59,405 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 21 [2022-07-19 15:03:59,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:03:59,405 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-07-19 15:03:59,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 32 states have internal predecessors, (56), 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 15:03:59,406 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-07-19 15:03:59,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:03:59,406 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:03:59,406 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:03:59,426 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 15:03:59,619 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 15:03:59,619 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:03:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:03:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash -946138643, now seen corresponding path program 5 times [2022-07-19 15:03:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:03:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176990939] [2022-07-19 15:03:59,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:03:59,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:03:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:03:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:03:59,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:03:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176990939] [2022-07-19 15:03:59,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176990939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:03:59,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387125086] [2022-07-19 15:03:59,870 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:03:59,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:03:59,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:03:59,876 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 15:03:59,878 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 15:03:59,909 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 15:03:59,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:03:59,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 15:03:59,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:00,125 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:00,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:00,604 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:00,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387125086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:00,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:00,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 33 [2022-07-19 15:04:00,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950540138] [2022-07-19 15:04:00,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:00,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 15:04:00,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:00,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 15:04:00,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=882, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 15:04:00,606 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 15:04:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:01,756 INFO L93 Difference]: Finished difference Result 93 states and 101 transitions. [2022-07-19 15:04:01,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 15:04:01,756 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 25 [2022-07-19 15:04:01,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:01,758 INFO L225 Difference]: With dead ends: 93 [2022-07-19 15:04:01,758 INFO L226 Difference]: Without dead ends: 72 [2022-07-19 15:04:01,759 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=554, Invalid=2868, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 15:04:01,760 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 97 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:01,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 81 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:04:01,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-19 15:04:01,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 35. [2022-07-19 15:04:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 states have internal predecessors, (37), 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 15:04:01,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-07-19 15:04:01,777 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2022-07-19 15:04:01,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:01,777 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-07-19 15:04:01,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 33 states have internal predecessors, (63), 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 15:04:01,777 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-07-19 15:04:01,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 15:04:01,778 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:01,778 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:01,794 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 15:04:01,980 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 15:04:01,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:01,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1059897673, now seen corresponding path program 6 times [2022-07-19 15:04:01,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635775578] [2022-07-19 15:04:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:01,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 22 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:02,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635775578] [2022-07-19 15:04:02,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635775578] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:02,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729898998] [2022-07-19 15:04:02,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:04:02,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:02,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:02,309 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 15:04:02,310 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 15:04:02,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 15:04:02,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:02,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 15:04:02,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:02,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:03,319 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:03,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729898998] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:03,320 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:03,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2022-07-19 15:04:03,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919597499] [2022-07-19 15:04:03,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:03,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 15:04:03,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:03,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 15:04:03,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1632, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 15:04:03,322 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 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 15:04:04,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:04,101 INFO L93 Difference]: Finished difference Result 60 states and 64 transitions. [2022-07-19 15:04:04,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:04:04,102 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 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 29 [2022-07-19 15:04:04,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:04,102 INFO L225 Difference]: With dead ends: 60 [2022-07-19 15:04:04,102 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 15:04:04,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=493, Invalid=3167, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 15:04:04,104 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:04,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 72 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:04:04,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 15:04:04,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2022-07-19 15:04:04,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 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 15:04:04,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-07-19 15:04:04,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-07-19 15:04:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:04,119 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-07-19 15:04:04,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.8181818181818181) internal successors, (80), 44 states have internal predecessors, (80), 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 15:04:04,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-07-19 15:04:04,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 15:04:04,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:04,120 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:04,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:04,323 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 15:04:04,323 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:04,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:04,324 INFO L85 PathProgramCache]: Analyzing trace with hash -138352531, now seen corresponding path program 7 times [2022-07-19 15:04:04,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:04,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069352286] [2022-07-19 15:04:04,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:04,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 35 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:04,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069352286] [2022-07-19 15:04:04,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069352286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:04,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020718646] [2022-07-19 15:04:04,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:04:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:04,670 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 15:04:04,671 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 15:04:04,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:04,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 15:04:04,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:04,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:05,676 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:05,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020718646] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:05,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:05,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 43 [2022-07-19 15:04:05,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281983577] [2022-07-19 15:04:05,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:05,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 15:04:05,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:05,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 15:04:05,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1523, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 15:04:05,678 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 15:04:07,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:07,260 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2022-07-19 15:04:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 15:04:07,260 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 33 [2022-07-19 15:04:07,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:07,264 INFO L225 Difference]: With dead ends: 93 [2022-07-19 15:04:07,264 INFO L226 Difference]: Without dead ends: 66 [2022-07-19 15:04:07,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=895, Invalid=4957, Unknown=0, NotChecked=0, Total=5852 [2022-07-19 15:04:07,266 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 144 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:07,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 116 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:04:07,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-07-19 15:04:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-07-19 15:04:07,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 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 15:04:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-19 15:04:07,283 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 33 [2022-07-19 15:04:07,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:07,283 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-19 15:04:07,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.9767441860465116) internal successors, (85), 43 states have internal predecessors, (85), 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 15:04:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-19 15:04:07,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:04:07,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:07,284 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:07,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 15:04:07,485 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 15:04:07,485 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:07,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:07,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1196154167, now seen corresponding path program 8 times [2022-07-19 15:04:07,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:07,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259701494] [2022-07-19 15:04:07,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:07,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 51 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:07,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:07,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259701494] [2022-07-19 15:04:07,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259701494] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:07,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992486541] [2022-07-19 15:04:07,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:04:07,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:07,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:07,851 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 15:04:07,851 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 15:04:07,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:04:07,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:07,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 15:04:07,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:08,208 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:08,209 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:09,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992486541] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:09,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:09,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 48 [2022-07-19 15:04:09,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8189461] [2022-07-19 15:04:09,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:09,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 15:04:09,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:09,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 15:04:09,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=1908, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 15:04:09,006 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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 15:04:10,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:10,957 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-07-19 15:04:10,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-19 15:04:10,958 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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 37 [2022-07-19 15:04:10,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:10,959 INFO L225 Difference]: With dead ends: 124 [2022-07-19 15:04:10,959 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 15:04:10,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1841 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1097, Invalid=6213, Unknown=0, NotChecked=0, Total=7310 [2022-07-19 15:04:10,962 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 164 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:10,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 132 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:04:10,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 15:04:11,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 72. [2022-07-19 15:04:11,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 71 states have internal predecessors, (82), 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 15:04:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-07-19 15:04:11,006 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 37 [2022-07-19 15:04:11,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:11,006 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-07-19 15:04:11,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 48 states have internal predecessors, (96), 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 15:04:11,007 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-07-19 15:04:11,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 15:04:11,007 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:11,008 INFO L195 NwaCegarLoop]: trace histogram [15, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:11,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:11,223 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 15:04:11,223 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:11,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:11,224 INFO L85 PathProgramCache]: Analyzing trace with hash -826667923, now seen corresponding path program 9 times [2022-07-19 15:04:11,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:11,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206629170] [2022-07-19 15:04:11,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:11,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:11,488 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 91 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206629170] [2022-07-19 15:04:11,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206629170] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:11,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828103668] [2022-07-19 15:04:11,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:04:11,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:11,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:11,490 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:11,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 15:04:11,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-19 15:04:11,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:11,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 15:04:11,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:11,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:12,345 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:12,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828103668] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:12,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:12,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 63 [2022-07-19 15:04:12,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481837279] [2022-07-19 15:04:12,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:12,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-19 15:04:12,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:12,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-19 15:04:12,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=3072, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 15:04:12,349 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 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 15:04:13,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:13,764 INFO L93 Difference]: Finished difference Result 266 states and 288 transitions. [2022-07-19 15:04:13,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-19 15:04:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 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 41 [2022-07-19 15:04:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:13,766 INFO L225 Difference]: With dead ends: 266 [2022-07-19 15:04:13,766 INFO L226 Difference]: Without dead ends: 264 [2022-07-19 15:04:13,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3999 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3111, Invalid=9771, Unknown=0, NotChecked=0, Total=12882 [2022-07-19 15:04:13,769 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 397 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:13,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 219 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:04:13,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-07-19 15:04:13,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 72. [2022-07-19 15:04:13,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1126760563380282) internal successors, (79), 71 states have internal predecessors, (79), 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 15:04:13,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2022-07-19 15:04:13,836 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2022-07-19 15:04:13,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:13,836 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2022-07-19 15:04:13,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5238095238095237) internal successors, (96), 63 states have internal predecessors, (96), 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 15:04:13,836 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2022-07-19 15:04:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 15:04:13,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:13,839 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:13,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-19 15:04:14,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 15:04:14,040 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:14,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1395466515, now seen corresponding path program 10 times [2022-07-19 15:04:14,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:14,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544272398] [2022-07-19 15:04:14,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:14,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 70 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:14,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:14,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544272398] [2022-07-19 15:04:14,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544272398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:14,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671958780] [2022-07-19 15:04:14,471 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:04:14,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:14,472 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:14,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 15:04:14,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:04:14,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:14,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 15:04:14,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:14,919 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:14,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:15,805 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:15,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671958780] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:15,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:15,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 53 [2022-07-19 15:04:15,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688858877] [2022-07-19 15:04:15,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:15,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 15:04:15,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 15:04:15,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=2336, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 15:04:15,808 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:18,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:18,321 INFO L93 Difference]: Finished difference Result 277 states and 289 transitions. [2022-07-19 15:04:18,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-19 15:04:18,322 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 15:04:18,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:18,323 INFO L225 Difference]: With dead ends: 277 [2022-07-19 15:04:18,323 INFO L226 Difference]: Without dead ends: 244 [2022-07-19 15:04:18,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1320, Invalid=7610, Unknown=0, NotChecked=0, Total=8930 [2022-07-19 15:04:18,326 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 189 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:18,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 151 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:04:18,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-19 15:04:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 71. [2022-07-19 15:04:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1) internal successors, (77), 70 states have internal predecessors, (77), 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 15:04:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2022-07-19 15:04:18,372 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 41 [2022-07-19 15:04:18,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:18,373 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2022-07-19 15:04:18,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:18,373 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2022-07-19 15:04:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 15:04:18,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:18,374 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:18,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:18,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 15:04:18,578 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:18,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:18,578 INFO L85 PathProgramCache]: Analyzing trace with hash 286483529, now seen corresponding path program 11 times [2022-07-19 15:04:18,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:18,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537931216] [2022-07-19 15:04:18,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:18,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:18,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:19,076 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 92 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:19,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:19,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537931216] [2022-07-19 15:04:19,077 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537931216] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:19,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922383794] [2022-07-19 15:04:19,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:04:19,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:19,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:19,079 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:19,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 15:04:19,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-19 15:04:19,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:19,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 15:04:19,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:19,558 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:19,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:20,601 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:20,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922383794] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:20,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:20,601 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 58 [2022-07-19 15:04:20,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898059340] [2022-07-19 15:04:20,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:20,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-07-19 15:04:20,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:20,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-07-19 15:04:20,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=2807, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 15:04:20,604 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 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 15:04:23,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:23,563 INFO L93 Difference]: Finished difference Result 268 states and 281 transitions. [2022-07-19 15:04:23,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-19 15:04:23,564 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 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 45 [2022-07-19 15:04:23,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:23,565 INFO L225 Difference]: With dead ends: 268 [2022-07-19 15:04:23,565 INFO L226 Difference]: Without dead ends: 232 [2022-07-19 15:04:23,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2747 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1564, Invalid=9148, Unknown=0, NotChecked=0, Total=10712 [2022-07-19 15:04:23,567 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 204 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 1368 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:23,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 184 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1368 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 15:04:23,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-07-19 15:04:23,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 70. [2022-07-19 15:04:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 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 15:04:23,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2022-07-19 15:04:23,613 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 45 [2022-07-19 15:04:23,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:23,614 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2022-07-19 15:04:23,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0344827586206895) internal successors, (118), 58 states have internal predecessors, (118), 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 15:04:23,614 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2022-07-19 15:04:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-19 15:04:23,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:23,615 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:23,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:23,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:23,823 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:23,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:23,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1446573421, now seen corresponding path program 12 times [2022-07-19 15:04:23,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:23,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786540815] [2022-07-19 15:04:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:23,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:23,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:24,380 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 117 proven. 104 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:24,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786540815] [2022-07-19 15:04:24,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786540815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:24,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995951064] [2022-07-19 15:04:24,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:04:24,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:24,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:24,382 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:24,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 15:04:24,423 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-19 15:04:24,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:24,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 15:04:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:25,197 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:25,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:26,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995951064] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:26,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:26,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 74 [2022-07-19 15:04:26,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183695775] [2022-07-19 15:04:26,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:26,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-07-19 15:04:26,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-07-19 15:04:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=4727, Unknown=0, NotChecked=0, Total=5402 [2022-07-19 15:04:26,437 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:28,531 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2022-07-19 15:04:28,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 15:04:28,532 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2022-07-19 15:04:28,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:28,532 INFO L225 Difference]: With dead ends: 117 [2022-07-19 15:04:28,532 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 15:04:28,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1233, Invalid=8867, Unknown=0, NotChecked=0, Total=10100 [2022-07-19 15:04:28,535 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:28,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 100 Invalid, 1062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:04:28,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 15:04:28,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2022-07-19 15:04:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 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 15:04:28,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2022-07-19 15:04:28,583 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 49 [2022-07-19 15:04:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:28,583 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2022-07-19 15:04:28,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.8918918918918919) internal successors, (140), 74 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:28,583 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2022-07-19 15:04:28,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 15:04:28,584 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:28,584 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:28,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:28,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 15:04:28,784 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:28,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:28,785 INFO L85 PathProgramCache]: Analyzing trace with hash -2015197751, now seen corresponding path program 13 times [2022-07-19 15:04:28,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:28,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965910343] [2022-07-19 15:04:28,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:28,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:28,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 145 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:29,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965910343] [2022-07-19 15:04:29,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965910343] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:29,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942254901] [2022-07-19 15:04:29,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:04:29,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:29,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:29,453 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:29,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 15:04:29,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:29,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 53 conjunts are in the unsatisfiable core [2022-07-19 15:04:29,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:30,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:31,389 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:31,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942254901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:31,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:31,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 68 [2022-07-19 15:04:31,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546634512] [2022-07-19 15:04:31,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:31,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-19 15:04:31,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:31,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-19 15:04:31,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=678, Invalid=3878, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 15:04:31,391 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:35,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:35,184 INFO L93 Difference]: Finished difference Result 232 states and 247 transitions. [2022-07-19 15:04:35,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-19 15:04:35,185 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2022-07-19 15:04:35,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:35,185 INFO L225 Difference]: With dead ends: 232 [2022-07-19 15:04:35,185 INFO L226 Difference]: Without dead ends: 190 [2022-07-19 15:04:35,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3829 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=2115, Invalid=12647, Unknown=0, NotChecked=0, Total=14762 [2022-07-19 15:04:35,187 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 261 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 1764 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 2032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:35,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [261 Valid, 243 Invalid, 2032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1764 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:04:35,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-07-19 15:04:35,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 68. [2022-07-19 15:04:35,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 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 15:04:35,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-07-19 15:04:35,238 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 53 [2022-07-19 15:04:35,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:35,238 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-07-19 15:04:35,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.0588235294117645) internal successors, (140), 68 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:04:35,239 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-07-19 15:04:35,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-19 15:04:35,239 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:35,239 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:35,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:35,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 15:04:35,443 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:35,444 INFO L85 PathProgramCache]: Analyzing trace with hash 895167469, now seen corresponding path program 14 times [2022-07-19 15:04:35,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:35,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964905142] [2022-07-19 15:04:35,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:35,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 176 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:36,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964905142] [2022-07-19 15:04:36,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964905142] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:36,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613430293] [2022-07-19 15:04:36,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:04:36,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:36,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:36,207 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:36,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 15:04:36,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:04:36,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:36,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-19 15:04:36,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:37,233 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:37,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:38,805 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:38,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613430293] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:38,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:38,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 86 [2022-07-19 15:04:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699106654] [2022-07-19 15:04:38,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:38,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-19 15:04:38,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-19 15:04:38,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=6313, Unknown=0, NotChecked=0, Total=7310 [2022-07-19 15:04:38,807 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 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 15:04:43,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:43,391 INFO L93 Difference]: Finished difference Result 205 states and 221 transitions. [2022-07-19 15:04:43,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-07-19 15:04:43,392 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 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 57 [2022-07-19 15:04:43,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:43,393 INFO L225 Difference]: With dead ends: 205 [2022-07-19 15:04:43,393 INFO L226 Difference]: Without dead ends: 160 [2022-07-19 15:04:43,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6358 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=2842, Invalid=18038, Unknown=0, NotChecked=0, Total=20880 [2022-07-19 15:04:43,395 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 290 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 2215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:43,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 269 Invalid, 2215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:04:43,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-19 15:04:43,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 67. [2022-07-19 15:04:43,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 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 15:04:43,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-07-19 15:04:43,447 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 57 [2022-07-19 15:04:43,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:43,447 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-07-19 15:04:43,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.9069767441860466) internal successors, (164), 86 states have internal predecessors, (164), 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 15:04:43,447 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-07-19 15:04:43,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-07-19 15:04:43,448 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:43,448 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:43,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:43,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:43,649 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1253672777, now seen corresponding path program 15 times [2022-07-19 15:04:43,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:43,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074730911] [2022-07-19 15:04:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:43,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:44,438 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 210 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:44,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:44,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074730911] [2022-07-19 15:04:44,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074730911] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:44,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742152609] [2022-07-19 15:04:44,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:04:44,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:44,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:44,440 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:44,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 15:04:44,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-19 15:04:44,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:44,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-19 15:04:44,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:45,601 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:45,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:47,366 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:47,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742152609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:47,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:47,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 92 [2022-07-19 15:04:47,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575011838] [2022-07-19 15:04:47,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:47,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-19 15:04:47,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:47,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-19 15:04:47,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1020, Invalid=7352, Unknown=0, NotChecked=0, Total=8372 [2022-07-19 15:04:47,369 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 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 15:04:50,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:50,626 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2022-07-19 15:04:50,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 15:04:50,626 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 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 61 [2022-07-19 15:04:50,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:50,627 INFO L225 Difference]: With dead ends: 116 [2022-07-19 15:04:50,627 INFO L226 Difference]: Without dead ends: 68 [2022-07-19 15:04:50,628 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3871 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1845, Invalid=13655, Unknown=0, NotChecked=0, Total=15500 [2022-07-19 15:04:50,628 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 78 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:50,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 103 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:04:50,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-07-19 15:04:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2022-07-19 15:04:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 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 15:04:50,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-07-19 15:04:50,682 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 61 [2022-07-19 15:04:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:50,683 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-07-19 15:04:50,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.9130434782608696) internal successors, (176), 92 states have internal predecessors, (176), 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 15:04:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-07-19 15:04:50,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 15:04:50,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:50,683 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:50,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 15:04:50,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:50,884 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:04:50,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:04:50,884 INFO L85 PathProgramCache]: Analyzing trace with hash -576617875, now seen corresponding path program 16 times [2022-07-19 15:04:50,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:04:50,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177249671] [2022-07-19 15:04:50,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:04:50,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:04:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:04:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 247 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:51,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:04:51,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177249671] [2022-07-19 15:04:51,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177249671] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:04:51,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117235601] [2022-07-19 15:04:51,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:04:51,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:04:51,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:04:51,787 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:04:51,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 15:04:51,836 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:04:51,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:04:51,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 65 conjunts are in the unsatisfiable core [2022-07-19 15:04:51,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:04:52,573 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:52,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:04:54,350 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:04:54,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117235601] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:04:54,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:04:54,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 83 [2022-07-19 15:04:54,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542632760] [2022-07-19 15:04:54,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:04:54,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-19 15:04:54,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:04:54,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-19 15:04:54,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=5807, Unknown=0, NotChecked=0, Total=6806 [2022-07-19 15:04:54,351 INFO L87 Difference]: Start difference. First operand 66 states and 67 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 15:04:59,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:04:59,874 INFO L93 Difference]: Finished difference Result 181 states and 200 transitions. [2022-07-19 15:04:59,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-19 15:04:59,875 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 65 [2022-07-19 15:04:59,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:04:59,876 INFO L225 Difference]: With dead ends: 181 [2022-07-19 15:04:59,876 INFO L226 Difference]: Without dead ends: 130 [2022-07-19 15:04:59,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5782 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=3099, Invalid=18953, Unknown=0, NotChecked=0, Total=22052 [2022-07-19 15:04:59,877 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 355 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 2400 mSolverCounterSat, 364 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 364 IncrementalHoareTripleChecker+Valid, 2400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:04:59,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 334 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [364 Valid, 2400 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 15:04:59,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-19 15:04:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 86. [2022-07-19 15:04:59,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.2) internal successors, (102), 85 states have internal predecessors, (102), 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 15:04:59,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2022-07-19 15:04:59,961 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 65 [2022-07-19 15:04:59,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:04:59,961 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2022-07-19 15:04:59,961 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 15:04:59,961 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2022-07-19 15:04:59,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 15:04:59,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:04:59,962 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:04:59,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 15:05:00,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:00,162 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:05:00,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:05:00,163 INFO L85 PathProgramCache]: Analyzing trace with hash -181376823, now seen corresponding path program 17 times [2022-07-19 15:05:00,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:05:00,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526643370] [2022-07-19 15:05:00,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:05:00,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:05:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 287 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:01,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:05:01,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526643370] [2022-07-19 15:05:01,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526643370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:05:01,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901171182] [2022-07-19 15:05:01,119 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:05:01,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:01,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:05:01,121 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:05:01,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 15:05:01,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2022-07-19 15:05:01,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:05:01,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-19 15:05:01,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:05:01,988 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:01,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:05:04,098 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:04,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901171182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:05:04,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:05:04,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 88 [2022-07-19 15:05:04,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756936727] [2022-07-19 15:05:04,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:05:04,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-07-19 15:05:04,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:05:04,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-07-19 15:05:04,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1120, Invalid=6536, Unknown=0, NotChecked=0, Total=7656 [2022-07-19 15:05:04,100 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 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 15:05:10,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:05:10,421 INFO L93 Difference]: Finished difference Result 236 states and 256 transitions. [2022-07-19 15:05:10,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-07-19 15:05:10,421 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 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 69 [2022-07-19 15:05:10,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:05:10,422 INFO L225 Difference]: With dead ends: 236 [2022-07-19 15:05:10,422 INFO L226 Difference]: Without dead ends: 182 [2022-07-19 15:05:10,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6521 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3469, Invalid=21337, Unknown=0, NotChecked=0, Total=24806 [2022-07-19 15:05:10,424 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 386 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 2788 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 2788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:05:10,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 458 Invalid, 3209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 2788 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 15:05:10,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-19 15:05:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2022-07-19 15:05:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 135 states have internal predecessors, (154), 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 15:05:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 154 transitions. [2022-07-19 15:05:10,561 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 154 transitions. Word has length 69 [2022-07-19 15:05:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:05:10,561 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 154 transitions. [2022-07-19 15:05:10,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.090909090909091) internal successors, (184), 88 states have internal predecessors, (184), 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 15:05:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 154 transitions. [2022-07-19 15:05:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-07-19 15:05:10,562 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:05:10,562 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:05:10,578 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-19 15:05:10,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 15:05:10,762 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:05:10,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:05:10,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1267468051, now seen corresponding path program 18 times [2022-07-19 15:05:10,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:05:10,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405423995] [2022-07-19 15:05:10,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:05:10,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:05:10,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 330 proven. 215 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:11,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:05:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405423995] [2022-07-19 15:05:11,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405423995] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:05:11,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954436441] [2022-07-19 15:05:11,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:05:11,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:11,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:05:11,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:05:11,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 15:05:11,879 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2022-07-19 15:05:11,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:05:11,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-19 15:05:11,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:05:13,413 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:13,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:05:15,770 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:15,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954436441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:05:15,771 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:05:15,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 110 [2022-07-19 15:05:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626586239] [2022-07-19 15:05:15,771 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:05:15,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-07-19 15:05:15,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:05:15,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-07-19 15:05:15,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1437, Invalid=10553, Unknown=0, NotChecked=0, Total=11990 [2022-07-19 15:05:15,773 INFO L87 Difference]: Start difference. First operand 136 states and 154 transitions. Second operand has 110 states, 110 states have (on average 1.9272727272727272) internal successors, (212), 110 states have internal predecessors, (212), 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 15:05:20,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:05:20,715 INFO L93 Difference]: Finished difference Result 197 states and 216 transitions. [2022-07-19 15:05:20,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 15:05:20,715 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.9272727272727272) internal successors, (212), 110 states have internal predecessors, (212), 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 73 [2022-07-19 15:05:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:05:20,716 INFO L225 Difference]: With dead ends: 197 [2022-07-19 15:05:20,716 INFO L226 Difference]: Without dead ends: 140 [2022-07-19 15:05:20,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5569 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=2583, Invalid=19469, Unknown=0, NotChecked=0, Total=22052 [2022-07-19 15:05:20,718 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 89 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 1878 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 2132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 1878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:05:20,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 130 Invalid, 2132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 1878 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:05:20,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-19 15:05:20,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 136. [2022-07-19 15:05:20,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 135 states have internal predecessors, (153), 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 15:05:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2022-07-19 15:05:20,854 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 73 [2022-07-19 15:05:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:05:20,854 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2022-07-19 15:05:20,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.9272727272727272) internal successors, (212), 110 states have internal predecessors, (212), 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 15:05:20,855 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2022-07-19 15:05:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-07-19 15:05:20,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:05:20,855 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:05:20,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-19 15:05:21,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 15:05:21,056 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:05:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:05:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -473444811, now seen corresponding path program 19 times [2022-07-19 15:05:21,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:05:21,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865030970] [2022-07-19 15:05:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:05:21,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:05:21,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:21,491 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 136 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:21,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:05:21,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865030970] [2022-07-19 15:05:21,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865030970] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:05:21,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484627177] [2022-07-19 15:05:21,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:05:21,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:21,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:05:21,493 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:05:21,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 15:05:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-19 15:05:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:05:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:22,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:05:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 563 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:22,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484627177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:05:22,836 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:05:22,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2022-07-19 15:05:22,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128321629] [2022-07-19 15:05:22,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:05:22,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-19 15:05:22,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:05:22,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-19 15:05:22,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=916, Invalid=4634, Unknown=0, NotChecked=0, Total=5550 [2022-07-19 15:05:22,838 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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 15:05:23,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:05:23,972 INFO L93 Difference]: Finished difference Result 194 states and 213 transitions. [2022-07-19 15:05:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 15:05:23,972 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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 74 [2022-07-19 15:05:23,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:05:23,973 INFO L225 Difference]: With dead ends: 194 [2022-07-19 15:05:23,973 INFO L226 Difference]: Without dead ends: 192 [2022-07-19 15:05:23,974 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3361 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2199, Invalid=10011, Unknown=0, NotChecked=0, Total=12210 [2022-07-19 15:05:23,974 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 166 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 307 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 307 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:05:23,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 114 Invalid, 1045 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [307 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:05:23,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-19 15:05:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 78. [2022-07-19 15:05:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 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 15:05:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-07-19 15:05:24,065 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-07-19 15:05:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:05:24,066 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-07-19 15:05:24,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.52) internal successors, (114), 75 states have internal predecessors, (114), 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 15:05:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-07-19 15:05:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-07-19 15:05:24,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:05:24,067 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:05:24,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 15:05:24,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:24,281 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:05:24,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:05:24,281 INFO L85 PathProgramCache]: Analyzing trace with hash 283060809, now seen corresponding path program 20 times [2022-07-19 15:05:24,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:05:24,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125845046] [2022-07-19 15:05:24,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:05:24,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:05:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:25,410 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 376 proven. 237 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:25,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:05:25,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125845046] [2022-07-19 15:05:25,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125845046] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:05:25,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248606378] [2022-07-19 15:05:25,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:05:25,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:05:25,412 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:05:25,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 15:05:25,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:05:25,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:05:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 112 conjunts are in the unsatisfiable core [2022-07-19 15:05:25,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:05:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:27,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:05:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:29,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248606378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:05:29,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:05:29,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 116 [2022-07-19 15:05:29,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125083527] [2022-07-19 15:05:29,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:05:29,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-19 15:05:29,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:05:29,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-19 15:05:29,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1777, Invalid=11563, Unknown=0, NotChecked=0, Total=13340 [2022-07-19 15:05:29,868 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 116 states, 116 states have (on average 1.9310344827586208) internal successors, (224), 116 states have internal predecessors, (224), 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 15:05:38,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:05:38,407 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-07-19 15:05:38,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-19 15:05:38,407 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.9310344827586208) internal successors, (224), 116 states have internal predecessors, (224), 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 77 [2022-07-19 15:05:38,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:05:38,408 INFO L225 Difference]: With dead ends: 214 [2022-07-19 15:05:38,408 INFO L226 Difference]: Without dead ends: 154 [2022-07-19 15:05:38,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11738 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=5032, Invalid=32798, Unknown=0, NotChecked=0, Total=37830 [2022-07-19 15:05:38,410 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 442 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 3744 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 4251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 3744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:05:38,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [442 Valid, 453 Invalid, 4251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 3744 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 15:05:38,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-19 15:05:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 101. [2022-07-19 15:05:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.2) internal successors, (120), 100 states have internal predecessors, (120), 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 15:05:38,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-07-19 15:05:38,542 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 77 [2022-07-19 15:05:38,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:05:38,542 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-07-19 15:05:38,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.9310344827586208) internal successors, (224), 116 states have internal predecessors, (224), 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 15:05:38,542 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-07-19 15:05:38,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-19 15:05:38,543 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:05:38,543 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:05:38,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 15:05:38,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:38,747 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:05:38,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:05:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1899663213, now seen corresponding path program 21 times [2022-07-19 15:05:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:05:38,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594945296] [2022-07-19 15:05:38,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:05:38,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:05:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 425 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:40,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:05:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594945296] [2022-07-19 15:05:40,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594945296] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:05:40,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061173475] [2022-07-19 15:05:40,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:05:40,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:40,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:05:40,080 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:05:40,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 15:05:40,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2022-07-19 15:05:40,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:05:40,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 15:05:40,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:05:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:42,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:05:44,862 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:44,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061173475] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:05:44,863 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:05:44,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 122 [2022-07-19 15:05:44,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186945883] [2022-07-19 15:05:44,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:05:44,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-19 15:05:44,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:05:44,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-19 15:05:44,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1755, Invalid=13007, Unknown=0, NotChecked=0, Total=14762 [2022-07-19 15:05:44,866 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 122 states, 122 states have (on average 1.9344262295081966) internal successors, (236), 122 states have internal predecessors, (236), 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 15:05:51,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:05:51,125 INFO L93 Difference]: Finished difference Result 168 states and 188 transitions. [2022-07-19 15:05:51,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-19 15:05:51,126 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.9344262295081966) internal successors, (236), 122 states have internal predecessors, (236), 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 81 [2022-07-19 15:05:51,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:05:51,126 INFO L225 Difference]: With dead ends: 168 [2022-07-19 15:05:51,126 INFO L226 Difference]: Without dead ends: 105 [2022-07-19 15:05:51,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6871 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=3145, Invalid=23915, Unknown=0, NotChecked=0, Total=27060 [2022-07-19 15:05:51,127 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 103 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 2047 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 2345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:05:51,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 122 Invalid, 2345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2047 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:05:51,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-19 15:05:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-07-19 15:05:51,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.19) internal successors, (119), 100 states have internal predecessors, (119), 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 15:05:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 119 transitions. [2022-07-19 15:05:51,273 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 119 transitions. Word has length 81 [2022-07-19 15:05:51,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:05:51,273 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 119 transitions. [2022-07-19 15:05:51,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.9344262295081966) internal successors, (236), 122 states have internal predecessors, (236), 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 15:05:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 119 transitions. [2022-07-19 15:05:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 15:05:51,274 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:05:51,275 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:05:51,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 15:05:51,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 15:05:51,487 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:05:51,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:05:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1093180597, now seen corresponding path program 22 times [2022-07-19 15:05:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:05:51,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599401385] [2022-07-19 15:05:51,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:05:51,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:05:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 171 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:52,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:05:52,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599401385] [2022-07-19 15:05:52,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599401385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:05:52,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924016877] [2022-07-19 15:05:52,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:05:52,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:52,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:05:52,022 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:05:52,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 15:05:52,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:05:52,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:05:52,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 15:05:52,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:05:52,823 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:52,824 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:05:53,476 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 0 proven. 705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:53,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924016877] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:05:53,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:05:53,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 83 [2022-07-19 15:05:53,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191471897] [2022-07-19 15:05:53,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:05:53,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-07-19 15:05:53,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:05:53,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-07-19 15:05:53,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1117, Invalid=5689, Unknown=0, NotChecked=0, Total=6806 [2022-07-19 15:05:53,478 INFO L87 Difference]: Start difference. First operand 101 states and 119 transitions. Second operand has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:05:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:05:54,859 INFO L93 Difference]: Finished difference Result 165 states and 184 transitions. [2022-07-19 15:05:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-19 15:05:54,860 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2022-07-19 15:05:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:05:54,861 INFO L225 Difference]: With dead ends: 165 [2022-07-19 15:05:54,861 INFO L226 Difference]: Without dead ends: 163 [2022-07-19 15:05:54,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4156 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2683, Invalid=12323, Unknown=0, NotChecked=0, Total=15006 [2022-07-19 15:05:54,863 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 147 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:05:54,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 133 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:05:54,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-07-19 15:05:54,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2022-07-19 15:05:54,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 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 15:05:54,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-07-19 15:05:54,992 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 82 [2022-07-19 15:05:54,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:05:54,992 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-07-19 15:05:54,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5180722891566265) internal successors, (126), 83 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:05:54,992 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-07-19 15:05:54,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-07-19 15:05:54,992 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:05:54,992 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:05:55,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-19 15:05:55,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-19 15:05:55,193 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:05:55,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:05:55,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1789015095, now seen corresponding path program 23 times [2022-07-19 15:05:55,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:05:55,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269440059] [2022-07-19 15:05:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:05:55,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:05:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:05:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 477 proven. 284 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:56,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:05:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269440059] [2022-07-19 15:05:56,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269440059] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:05:56,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355421805] [2022-07-19 15:05:56,528 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:05:56,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:05:56,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:05:56,529 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:05:56,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 15:05:56,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-07-19 15:05:56,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:05:56,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-19 15:05:56,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:05:57,785 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:05:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:00,646 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:00,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355421805] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:00,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:00,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 108 [2022-07-19 15:06:00,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620463245] [2022-07-19 15:06:00,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:00,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-07-19 15:06:00,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:00,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-07-19 15:06:00,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1674, Invalid=9882, Unknown=0, NotChecked=0, Total=11556 [2022-07-19 15:06:00,649 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 108 states, 108 states have (on average 2.111111111111111) internal successors, (228), 108 states have internal predecessors, (228), 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 15:06:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:10,465 INFO L93 Difference]: Finished difference Result 236 states and 260 transitions. [2022-07-19 15:06:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-07-19 15:06:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.111111111111111) internal successors, (228), 108 states have internal predecessors, (228), 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 85 [2022-07-19 15:06:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:10,467 INFO L225 Difference]: With dead ends: 236 [2022-07-19 15:06:10,467 INFO L226 Difference]: Without dead ends: 170 [2022-07-19 15:06:10,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9917 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=5159, Invalid=32283, Unknown=0, NotChecked=0, Total=37442 [2022-07-19 15:06:10,469 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 519 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 4597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:10,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 526 Invalid, 4597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 4013 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-07-19 15:06:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-19 15:06:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 111. [2022-07-19 15:06:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.2) internal successors, (132), 110 states have internal predecessors, (132), 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 15:06:10,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 132 transitions. [2022-07-19 15:06:10,633 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 132 transitions. Word has length 85 [2022-07-19 15:06:10,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:10,634 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 132 transitions. [2022-07-19 15:06:10,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.111111111111111) internal successors, (228), 108 states have internal predecessors, (228), 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 15:06:10,634 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 132 transitions. [2022-07-19 15:06:10,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-19 15:06:10,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:10,635 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:10,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:10,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-19 15:06:10,851 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:10,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:10,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1654831635, now seen corresponding path program 24 times [2022-07-19 15:06:10,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:10,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922049792] [2022-07-19 15:06:10,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:10,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:10,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 532 proven. 309 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:12,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922049792] [2022-07-19 15:06:12,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922049792] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:12,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411584372] [2022-07-19 15:06:12,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:06:12,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:12,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:12,381 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:06:12,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 15:06:12,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2022-07-19 15:06:12,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:12,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-19 15:06:12,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:14,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:18,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411584372] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:18,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:18,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 134 [2022-07-19 15:06:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728983099] [2022-07-19 15:06:18,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-07-19 15:06:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:18,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-07-19 15:06:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2105, Invalid=15717, Unknown=0, NotChecked=0, Total=17822 [2022-07-19 15:06:18,104 INFO L87 Difference]: Start difference. First operand 111 states and 132 transitions. Second operand has 134 states, 134 states have (on average 1.9402985074626866) internal successors, (260), 134 states have internal predecessors, (260), 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 15:06:25,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:25,688 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2022-07-19 15:06:25,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-19 15:06:25,689 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.9402985074626866) internal successors, (260), 134 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2022-07-19 15:06:25,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:25,689 INFO L225 Difference]: With dead ends: 184 [2022-07-19 15:06:25,689 INFO L226 Difference]: Without dead ends: 115 [2022-07-19 15:06:25,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8309 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=3763, Invalid=28817, Unknown=0, NotChecked=0, Total=32580 [2022-07-19 15:06:25,692 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 111 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2217 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 2217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:25,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 144 Invalid, 2547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 2217 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 15:06:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-19 15:06:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2022-07-19 15:06:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.190909090909091) internal successors, (131), 110 states have internal predecessors, (131), 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 15:06:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 131 transitions. [2022-07-19 15:06:25,858 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 131 transitions. Word has length 89 [2022-07-19 15:06:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:25,859 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 131 transitions. [2022-07-19 15:06:25,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.9402985074626866) internal successors, (260), 134 states have internal predecessors, (260), 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 15:06:25,859 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 131 transitions. [2022-07-19 15:06:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-19 15:06:25,860 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:25,860 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:25,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:26,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 15:06:26,062 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:26,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:26,062 INFO L85 PathProgramCache]: Analyzing trace with hash -869430475, now seen corresponding path program 25 times [2022-07-19 15:06:26,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:26,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693485474] [2022-07-19 15:06:26,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:26,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 210 proven. 653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693485474] [2022-07-19 15:06:26,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693485474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:26,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949139377] [2022-07-19 15:06:26,688 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:06:26,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:26,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:26,689 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:06:26,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 15:06:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 69 conjunts are in the unsatisfiable core [2022-07-19 15:06:26,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:27,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:28,334 INFO L134 CoverageAnalysis]: Checked inductivity of 863 backedges. 0 proven. 863 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:28,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949139377] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:28,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:28,334 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 91 [2022-07-19 15:06:28,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507309786] [2022-07-19 15:06:28,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:28,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-07-19 15:06:28,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:28,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-07-19 15:06:28,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1338, Invalid=6852, Unknown=0, NotChecked=0, Total=8190 [2022-07-19 15:06:28,337 INFO L87 Difference]: Start difference. First operand 111 states and 131 transitions. Second operand has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:06:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:29,941 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2022-07-19 15:06:29,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 15:06:29,941 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2022-07-19 15:06:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:29,942 INFO L225 Difference]: With dead ends: 181 [2022-07-19 15:06:29,942 INFO L226 Difference]: Without dead ends: 179 [2022-07-19 15:06:29,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5035 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3215, Invalid=14875, Unknown=0, NotChecked=0, Total=18090 [2022-07-19 15:06:29,943 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 180 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 1344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:29,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 146 Invalid, 1344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:06:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-19 15:06:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 94. [2022-07-19 15:06:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 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 15:06:30,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-07-19 15:06:30,080 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 90 [2022-07-19 15:06:30,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:30,081 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-07-19 15:06:30,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 91 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:06:30,081 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-07-19 15:06:30,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-19 15:06:30,082 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:30,082 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:30,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:30,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:30,282 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:30,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:30,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1749306697, now seen corresponding path program 26 times [2022-07-19 15:06:30,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:30,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009100328] [2022-07-19 15:06:30,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:30,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 590 proven. 335 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:31,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009100328] [2022-07-19 15:06:31,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009100328] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:31,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775915553] [2022-07-19 15:06:31,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:06:31,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:31,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:31,767 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:06:31,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 15:06:31,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:06:31,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:31,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 136 conjunts are in the unsatisfiable core [2022-07-19 15:06:31,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:34,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:37,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775915553] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:37,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:37,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 140 [2022-07-19 15:06:37,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459175213] [2022-07-19 15:06:37,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:37,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-07-19 15:06:37,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:37,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-07-19 15:06:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2563, Invalid=16897, Unknown=0, NotChecked=0, Total=19460 [2022-07-19 15:06:37,900 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 140 states, 140 states have (on average 1.9428571428571428) internal successors, (272), 140 states have internal predecessors, (272), 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 15:06:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:06:50,419 INFO L93 Difference]: Finished difference Result 258 states and 284 transitions. [2022-07-19 15:06:50,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-07-19 15:06:50,419 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.9428571428571428) internal successors, (272), 140 states have internal predecessors, (272), 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 93 [2022-07-19 15:06:50,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:06:50,420 INFO L225 Difference]: With dead ends: 258 [2022-07-19 15:06:50,420 INFO L226 Difference]: Without dead ends: 186 [2022-07-19 15:06:50,423 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17212 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=7234, Invalid=47756, Unknown=0, NotChecked=0, Total=54990 [2022-07-19 15:06:50,424 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 583 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 5586 mSolverCounterSat, 706 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 583 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 6292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 706 IncrementalHoareTripleChecker+Valid, 5586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:06:50,424 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [583 Valid, 653 Invalid, 6292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [706 Valid, 5586 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-19 15:06:50,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-19 15:06:50,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 121. [2022-07-19 15:06:50,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.2) internal successors, (144), 120 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 15:06:50,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-07-19 15:06:50,647 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 93 [2022-07-19 15:06:50,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:06:50,647 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-07-19 15:06:50,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.9428571428571428) internal successors, (272), 140 states have internal predecessors, (272), 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 15:06:50,648 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-07-19 15:06:50,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 15:06:50,648 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:06:50,649 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:06:50,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-19 15:06:50,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:50,855 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:06:50,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:06:50,856 INFO L85 PathProgramCache]: Analyzing trace with hash 340008045, now seen corresponding path program 27 times [2022-07-19 15:06:50,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:06:50,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937957305] [2022-07-19 15:06:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:06:50,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:06:50,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:06:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 651 proven. 362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:52,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:06:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937957305] [2022-07-19 15:06:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937957305] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:06:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921269896] [2022-07-19 15:06:52,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:06:52,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:06:52,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:06:52,557 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:06:52,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 15:06:52,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2022-07-19 15:06:52,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:06:52,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-19 15:06:52,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:06:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:55,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:06:59,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:06:59,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921269896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:06:59,155 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:06:59,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 146 [2022-07-19 15:06:59,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138454986] [2022-07-19 15:06:59,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:06:59,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-07-19 15:06:59,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:06:59,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-07-19 15:06:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=18683, Unknown=0, NotChecked=0, Total=21170 [2022-07-19 15:06:59,157 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 146 states, 146 states have (on average 1.9452054794520548) internal successors, (284), 146 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 15:07:08,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:07:08,337 INFO L93 Difference]: Finished difference Result 200 states and 224 transitions. [2022-07-19 15:07:08,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-07-19 15:07:08,337 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.9452054794520548) internal successors, (284), 146 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 97 [2022-07-19 15:07:08,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:07:08,338 INFO L225 Difference]: With dead ends: 200 [2022-07-19 15:07:08,338 INFO L226 Difference]: Without dead ends: 125 [2022-07-19 15:07:08,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9883 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=4437, Invalid=34175, Unknown=0, NotChecked=0, Total=38612 [2022-07-19 15:07:08,340 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2663 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 2663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:07:08,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 143 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 2663 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 15:07:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-19 15:07:08,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 121. [2022-07-19 15:07:08,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.1916666666666667) internal successors, (143), 120 states have internal predecessors, (143), 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 15:07:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2022-07-19 15:07:08,557 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 97 [2022-07-19 15:07:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:07:08,558 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2022-07-19 15:07:08,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.9452054794520548) internal successors, (284), 146 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 15:07:08,558 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2022-07-19 15:07:08,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-07-19 15:07:08,559 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:07:08,559 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:07:08,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-19 15:07:08,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-19 15:07:08,763 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:07:08,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:07:08,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1740727883, now seen corresponding path program 28 times [2022-07-19 15:07:08,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:07:08,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397665746] [2022-07-19 15:07:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:07:08,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:07:08,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:07:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 253 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:09,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:07:09,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397665746] [2022-07-19 15:07:09,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397665746] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:07:09,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233687177] [2022-07-19 15:07:09,536 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:07:09,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:07:09,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:07:09,537 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:07:09,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 15:07:09,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:07:09,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:07:09,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-19 15:07:09,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:07:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:10,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:07:11,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1037 backedges. 0 proven. 1037 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:11,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233687177] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:07:11,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:07:11,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2022-07-19 15:07:11,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407743180] [2022-07-19 15:07:11,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:07:11,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-19 15:07:11,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:07:11,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-19 15:07:11,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1579, Invalid=8123, Unknown=0, NotChecked=0, Total=9702 [2022-07-19 15:07:11,425 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 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 15:07:13,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:07:13,343 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2022-07-19 15:07:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-19 15:07:13,348 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 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 98 [2022-07-19 15:07:13,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:07:13,348 INFO L225 Difference]: With dead ends: 197 [2022-07-19 15:07:13,348 INFO L226 Difference]: Without dead ends: 195 [2022-07-19 15:07:13,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 144 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5998 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3795, Invalid=17667, Unknown=0, NotChecked=0, Total=21462 [2022-07-19 15:07:13,350 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 177 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1196 mSolverCounterSat, 373 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 373 IncrementalHoareTripleChecker+Valid, 1196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:07:13,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 141 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [373 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:07:13,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-07-19 15:07:13,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 102. [2022-07-19 15:07:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 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 15:07:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-07-19 15:07:13,514 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-07-19 15:07:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:07:13,514 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-07-19 15:07:13,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.5151515151515151) internal successors, (150), 99 states have internal predecessors, (150), 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 15:07:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-07-19 15:07:13,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-19 15:07:13,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:07:13,515 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:07:13,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-07-19 15:07:13,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:07:13,716 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:07:13,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:07:13,716 INFO L85 PathProgramCache]: Analyzing trace with hash -584405303, now seen corresponding path program 29 times [2022-07-19 15:07:13,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:07:13,716 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900961754] [2022-07-19 15:07:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:07:13,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:07:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:07:15,523 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 715 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:15,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:07:15,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900961754] [2022-07-19 15:07:15,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900961754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:07:15,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056386364] [2022-07-19 15:07:15,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:07:15,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:07:15,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:07:15,525 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:07:15,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 15:07:15,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-07-19 15:07:15,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:07:15,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 101 conjunts are in the unsatisfiable core [2022-07-19 15:07:15,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:07:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:17,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:07:21,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:21,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056386364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:07:21,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:07:21,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 128 [2022-07-19 15:07:21,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553751214] [2022-07-19 15:07:21,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:07:21,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-07-19 15:07:21,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:07:21,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-07-19 15:07:21,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2340, Invalid=13916, Unknown=0, NotChecked=0, Total=16256 [2022-07-19 15:07:21,193 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 128 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 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 15:07:35,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:07:35,276 INFO L93 Difference]: Finished difference Result 280 states and 308 transitions. [2022-07-19 15:07:35,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-07-19 15:07:35,276 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 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 101 [2022-07-19 15:07:35,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:07:35,277 INFO L225 Difference]: With dead ends: 280 [2022-07-19 15:07:35,277 INFO L226 Difference]: Without dead ends: 202 [2022-07-19 15:07:35,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14017 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=7185, Invalid=45485, Unknown=0, NotChecked=0, Total=52670 [2022-07-19 15:07:35,279 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 647 mSDsluCounter, 729 mSDsCounter, 0 mSdLazyCounter, 5790 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 6582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 5790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:07:35,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [647 Valid, 735 Invalid, 6582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 5790 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 15:07:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-19 15:07:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 131. [2022-07-19 15:07:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.2) internal successors, (156), 130 states have internal predecessors, (156), 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 15:07:35,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 156 transitions. [2022-07-19 15:07:35,527 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 156 transitions. Word has length 101 [2022-07-19 15:07:35,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:07:35,527 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 156 transitions. [2022-07-19 15:07:35,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.125) internal successors, (272), 128 states have internal predecessors, (272), 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 15:07:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 156 transitions. [2022-07-19 15:07:35,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-07-19 15:07:35,528 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:07:35,528 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:07:35,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-19 15:07:35,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:07:35,729 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:07:35,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:07:35,729 INFO L85 PathProgramCache]: Analyzing trace with hash -2091445523, now seen corresponding path program 30 times [2022-07-19 15:07:35,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:07:35,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718046003] [2022-07-19 15:07:35,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:07:35,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:07:35,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:07:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 782 proven. 419 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:07:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:07:37,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718046003] [2022-07-19 15:07:37,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718046003] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:07:37,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272067965] [2022-07-19 15:07:37,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:07:37,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:07:37,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:07:37,579 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:07:37,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 15:07:37,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-07-19 15:07:37,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:07:37,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-19 15:07:37,694 INFO L286 TraceCheckSpWp]: Computing forward predicates...