./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5317dae 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/fragtest_simple.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 be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.2.2-?-b5317da-m [2023-02-16 01:23:54,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-16 01:23:54,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-16 01:23:54,357 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-16 01:23:54,357 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-16 01:23:54,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-16 01:23:54,361 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-16 01:23:54,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-16 01:23:54,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-16 01:23:54,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-16 01:23:54,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-16 01:23:54,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-16 01:23:54,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-16 01:23:54,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-16 01:23:54,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-16 01:23:54,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-16 01:23:54,375 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-16 01:23:54,376 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-16 01:23:54,377 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-16 01:23:54,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-16 01:23:54,382 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-16 01:23:54,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-16 01:23:54,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-16 01:23:54,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-16 01:23:54,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-16 01:23:54,390 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-16 01:23:54,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-16 01:23:54,392 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-16 01:23:54,393 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-16 01:23:54,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-16 01:23:54,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-16 01:23:54,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-16 01:23:54,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-16 01:23:54,395 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-16 01:23:54,397 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-16 01:23:54,397 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-16 01:23:54,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-16 01:23:54,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-16 01:23:54,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-16 01:23:54,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-16 01:23:54,400 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-16 01:23:54,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-16 01:23:54,425 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-16 01:23:54,425 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-16 01:23:54,426 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-16 01:23:54,426 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-16 01:23:54,426 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-16 01:23:54,427 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-16 01:23:54,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-16 01:23:54,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-16 01:23:54,427 INFO L138 SettingsManager]: * Use SBE=true [2023-02-16 01:23:54,427 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-16 01:23:54,428 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-16 01:23:54,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-16 01:23:54,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-16 01:23:54,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-16 01:23:54,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-16 01:23:54,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-16 01:23:54,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-16 01:23:54,429 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-16 01:23:54,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-16 01:23:54,430 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-16 01:23:54,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-16 01:23:54,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-16 01:23:54,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-16 01:23:54,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-16 01:23:54,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:23:54,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-16 01:23:54,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-16 01:23:54,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-16 01:23:54,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-16 01:23:54,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-16 01:23:54,432 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-16 01:23:54,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-16 01:23:54,432 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-16 01:23:54,432 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-16 01:23:54,432 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-16 01:23:54,433 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2023-02-16 01:23:54,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-16 01:23:54,660 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-16 01:23:54,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-16 01:23:54,662 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-16 01:23:54,663 INFO L275 PluginConnector]: CDTParser initialized [2023-02-16 01:23:54,663 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-02-16 01:23:55,750 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-16 01:23:55,889 INFO L351 CDTParser]: Found 1 translation units. [2023-02-16 01:23:55,890 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2023-02-16 01:23:55,893 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde81a18e/f8959052943c4fcea46202eff6b9a0cf/FLAG17e700453 [2023-02-16 01:23:55,903 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dde81a18e/f8959052943c4fcea46202eff6b9a0cf [2023-02-16 01:23:55,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-16 01:23:55,906 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-16 01:23:55,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-16 01:23:55,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-16 01:23:55,909 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-16 01:23:55,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:23:55" (1/1) ... [2023-02-16 01:23:55,910 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6059458e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:55, skipping insertion in model container [2023-02-16 01:23:55,910 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.02 01:23:55" (1/1) ... [2023-02-16 01:23:55,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-16 01:23:55,926 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-16 01:23:56,039 WARN L237 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/fragtest_simple.i[893,906] [2023-02-16 01:23:56,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:23:56,060 INFO L203 MainTranslator]: Completed pre-run [2023-02-16 01:23:56,070 WARN L237 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/fragtest_simple.i[893,906] [2023-02-16 01:23:56,076 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-16 01:23:56,089 INFO L208 MainTranslator]: Completed translation [2023-02-16 01:23:56,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56 WrapperNode [2023-02-16 01:23:56,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-16 01:23:56,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-16 01:23:56,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-16 01:23:56,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-16 01:23:56,095 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,100 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,112 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2023-02-16 01:23:56,112 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-16 01:23:56,113 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-16 01:23:56,113 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-16 01:23:56,113 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-16 01:23:56,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,119 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,120 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,121 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,124 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,124 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-16 01:23:56,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-16 01:23:56,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-16 01:23:56,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-16 01:23:56,126 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (1/1) ... [2023-02-16 01:23:56,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-16 01:23:56,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:23:56,156 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) [2023-02-16 01:23:56,158 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 [2023-02-16 01:23:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-16 01:23:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-16 01:23:56,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-16 01:23:56,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-16 01:23:56,224 INFO L235 CfgBuilder]: Building ICFG [2023-02-16 01:23:56,225 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-16 01:23:56,364 INFO L276 CfgBuilder]: Performing block encoding [2023-02-16 01:23:56,367 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-16 01:23:56,368 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-16 01:23:56,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:23:56 BoogieIcfgContainer [2023-02-16 01:23:56,369 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-16 01:23:56,370 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-16 01:23:56,370 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-16 01:23:56,372 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-16 01:23:56,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.02 01:23:55" (1/3) ... [2023-02-16 01:23:56,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31647aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:23:56, skipping insertion in model container [2023-02-16 01:23:56,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.02 01:23:56" (2/3) ... [2023-02-16 01:23:56,373 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31647aa9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.02 01:23:56, skipping insertion in model container [2023-02-16 01:23:56,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.02 01:23:56" (3/3) ... [2023-02-16 01:23:56,374 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2023-02-16 01:23:56,397 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-16 01:23:56,412 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-16 01:23:56,450 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-16 01:23:56,460 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=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@585cf35f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-16 01:23:56,461 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-16 01:23:56,464 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-16 01:23:56,467 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:56,468 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:56,468 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1265170590, now seen corresponding path program 1 times [2023-02-16 01:23:56,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:56,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397988730] [2023-02-16 01:23:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:56,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:56,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:56,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397988730] [2023-02-16 01:23:56,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397988730] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:23:56,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:23:56,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-16 01:23:56,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870596035] [2023-02-16 01:23:56,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:23:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-16 01:23:56,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:56,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-16 01:23:56,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-16 01:23:56,636 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 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 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:56,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:56,647 INFO L93 Difference]: Finished difference Result 34 states and 48 transitions. [2023-02-16 01:23:56,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-16 01:23:56,649 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2023-02-16 01:23:56,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:56,654 INFO L225 Difference]: With dead ends: 34 [2023-02-16 01:23:56,655 INFO L226 Difference]: Without dead ends: 15 [2023-02-16 01:23:56,656 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 [2023-02-16 01:23:56,659 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2023-02-16 01:23:56,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:23:56,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-16 01:23:56,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-16 01:23:56,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:56,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-02-16 01:23:56,679 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 10 [2023-02-16 01:23:56,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:56,680 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-02-16 01:23:56,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:56,680 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-02-16 01:23:56,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-16 01:23:56,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:56,681 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:56,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-16 01:23:56,681 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:56,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:56,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1704738984, now seen corresponding path program 1 times [2023-02-16 01:23:56,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:56,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097122625] [2023-02-16 01:23:56,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:56,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:56,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:56,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097122625] [2023-02-16 01:23:56,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097122625] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:23:56,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:23:56,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-16 01:23:56,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694503648] [2023-02-16 01:23:56,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:23:56,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-16 01:23:56,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:56,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-16 01:23:56,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-16 01:23:56,856 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:56,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:56,888 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-02-16 01:23:56,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 01:23:56,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2023-02-16 01:23:56,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:56,889 INFO L225 Difference]: With dead ends: 20 [2023-02-16 01:23:56,891 INFO L226 Difference]: Without dead ends: 18 [2023-02-16 01:23:56,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:23:56,892 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 8 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:23:56,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:23:56,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-16 01:23:56,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-02-16 01:23:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:56,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-02-16 01:23:56,898 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2023-02-16 01:23:56,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:56,899 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-02-16 01:23:56,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:56,899 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-02-16 01:23:56,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-16 01:23:56,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:56,901 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:56,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-16 01:23:56,901 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:56,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:56,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1111328011, now seen corresponding path program 1 times [2023-02-16 01:23:56,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:56,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400618787] [2023-02-16 01:23:56,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:56,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:56,986 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:56,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:56,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400618787] [2023-02-16 01:23:56,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400618787] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-16 01:23:56,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-16 01:23:56,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-16 01:23:56,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108298479] [2023-02-16 01:23:56,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-16 01:23:56,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-16 01:23:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:56,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-16 01:23:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-16 01:23:56,989 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-02-16 01:23:57,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:57,028 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-02-16 01:23:57,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-16 01:23:57,028 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) Word has length 16 [2023-02-16 01:23:57,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:57,029 INFO L225 Difference]: With dead ends: 34 [2023-02-16 01:23:57,029 INFO L226 Difference]: Without dead ends: 23 [2023-02-16 01:23:57,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-16 01:23:57,030 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:23:57,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 34 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:23:57,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-16 01:23:57,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-02-16 01:23:57,033 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) [2023-02-16 01:23:57,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-02-16 01:23:57,034 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2023-02-16 01:23:57,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:57,034 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-02-16 01:23:57,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 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) [2023-02-16 01:23:57,035 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-02-16 01:23:57,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-16 01:23:57,035 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:57,035 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:57,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-16 01:23:57,035 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:57,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:57,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1396960176, now seen corresponding path program 1 times [2023-02-16 01:23:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:57,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591030349] [2023-02-16 01:23:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:57,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:57,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591030349] [2023-02-16 01:23:57,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591030349] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:23:57,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285124585] [2023-02-16 01:23:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:57,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:57,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:23:57,104 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) [2023-02-16 01:23:57,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-16 01:23:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:57,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-16 01:23:57,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:23:57,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:57,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:23:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:57,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285124585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:23:57,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:23:57,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-02-16 01:23:57,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113540367] [2023-02-16 01:23:57,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:23:57,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:23:57,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:23:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:23:57,322 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2023-02-16 01:23:57,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:57,456 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-02-16 01:23:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-16 01:23:57,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) Word has length 18 [2023-02-16 01:23:57,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:57,458 INFO L225 Difference]: With dead ends: 45 [2023-02-16 01:23:57,458 INFO L226 Difference]: Without dead ends: 34 [2023-02-16 01:23:57,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:23:57,466 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:23:57,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 52 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:23:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-02-16 01:23:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2023-02-16 01:23:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2023-02-16 01:23:57,477 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 18 [2023-02-16 01:23:57,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:57,477 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2023-02-16 01:23:57,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 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) [2023-02-16 01:23:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2023-02-16 01:23:57,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-16 01:23:57,478 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:57,478 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:57,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-16 01:23:57,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:57,683 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:57,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:57,684 INFO L85 PathProgramCache]: Analyzing trace with hash -2071602104, now seen corresponding path program 2 times [2023-02-16 01:23:57,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:57,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531121267] [2023-02-16 01:23:57,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:57,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:57,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:57,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531121267] [2023-02-16 01:23:57,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531121267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:23:57,764 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372099530] [2023-02-16 01:23:57,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:23:57,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:57,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:23:57,766 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) [2023-02-16 01:23:57,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-16 01:23:57,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:23:57,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:23:57,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-16 01:23:57,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:23:57,850 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:57,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:23:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:57,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372099530] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:23:57,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:23:57,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-02-16 01:23:57,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159746910] [2023-02-16 01:23:57,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:23:57,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-16 01:23:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-16 01:23:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2023-02-16 01:23:57,888 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:57,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:57,946 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-02-16 01:23:57,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-16 01:23:57,946 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-16 01:23:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:57,947 INFO L225 Difference]: With dead ends: 54 [2023-02-16 01:23:57,947 INFO L226 Difference]: Without dead ends: 39 [2023-02-16 01:23:57,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:23:57,948 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:23:57,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 80 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:23:57,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-16 01:23:57,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2023-02-16 01:23:57,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 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) [2023-02-16 01:23:57,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-02-16 01:23:57,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 24 [2023-02-16 01:23:57,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:57,952 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-02-16 01:23:57,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:57,952 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-02-16 01:23:57,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-16 01:23:57,953 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:57,953 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:57,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-16 01:23:58,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:58,158 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:58,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:58,158 INFO L85 PathProgramCache]: Analyzing trace with hash 65129965, now seen corresponding path program 3 times [2023-02-16 01:23:58,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:58,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879611409] [2023-02-16 01:23:58,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:58,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:58,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:58,260 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:58,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879611409] [2023-02-16 01:23:58,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879611409] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:23:58,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373883284] [2023-02-16 01:23:58,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:23:58,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:58,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:23:58,262 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) [2023-02-16 01:23:58,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-16 01:23:58,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-16 01:23:58,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:23:58,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-16 01:23:58,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:23:58,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:58,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:23:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:58,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373883284] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:23:58,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:23:58,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2023-02-16 01:23:58,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469812641] [2023-02-16 01:23:58,386 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:23:58,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-16 01:23:58,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:58,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-16 01:23:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-02-16 01:23:58,388 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:58,459 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-02-16 01:23:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-16 01:23:58,459 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 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 26 [2023-02-16 01:23:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:58,460 INFO L225 Difference]: With dead ends: 44 [2023-02-16 01:23:58,460 INFO L226 Difference]: Without dead ends: 42 [2023-02-16 01:23:58,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:23:58,461 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:23:58,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 87 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:23:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-16 01:23:58,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2023-02-16 01:23:58,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:58,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-02-16 01:23:58,465 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 26 [2023-02-16 01:23:58,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:58,465 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-02-16 01:23:58,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:58,465 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-02-16 01:23:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-16 01:23:58,466 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:58,466 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:58,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-16 01:23:58,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:58,673 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:58,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:58,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1290527443, now seen corresponding path program 4 times [2023-02-16 01:23:58,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:58,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895608336] [2023-02-16 01:23:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:58,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:58,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:58,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895608336] [2023-02-16 01:23:58,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895608336] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:23:58,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264820102] [2023-02-16 01:23:58,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:23:58,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:58,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:23:58,777 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) [2023-02-16 01:23:58,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-16 01:23:58,841 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:23:58,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:23:58,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-16 01:23:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:23:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:58,941 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:23:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:59,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264820102] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:23:59,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:23:59,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2023-02-16 01:23:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624888329] [2023-02-16 01:23:59,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:23:59,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 01:23:59,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 01:23:59,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:23:59,009 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) [2023-02-16 01:23:59,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:59,137 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2023-02-16 01:23:59,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-16 01:23:59,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) Word has length 34 [2023-02-16 01:23:59,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:59,138 INFO L225 Difference]: With dead ends: 97 [2023-02-16 01:23:59,138 INFO L226 Difference]: Without dead ends: 59 [2023-02-16 01:23:59,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=598, Unknown=0, NotChecked=0, Total=812 [2023-02-16 01:23:59,139 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 62 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:23:59,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 117 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:23:59,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-16 01:23:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 39. [2023-02-16 01:23:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:59,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2023-02-16 01:23:59,144 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2023-02-16 01:23:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:59,144 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2023-02-16 01:23:59,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 20 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) [2023-02-16 01:23:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2023-02-16 01:23:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-16 01:23:59,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:59,145 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:59,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-16 01:23:59,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:59,349 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1017343069, now seen corresponding path program 5 times [2023-02-16 01:23:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:59,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396111259] [2023-02-16 01:23:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:23:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:59,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:23:59,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396111259] [2023-02-16 01:23:59,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396111259] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:23:59,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182745535] [2023-02-16 01:23:59,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:23:59,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:59,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:23:59,442 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) [2023-02-16 01:23:59,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-16 01:23:59,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-02-16 01:23:59,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:23:59,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-16 01:23:59,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:23:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:59,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:23:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 30 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:23:59,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182745535] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:23:59,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:23:59,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2023-02-16 01:23:59,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713875619] [2023-02-16 01:23:59,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:23:59,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-16 01:23:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:23:59,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-16 01:23:59,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-16 01:23:59,599 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:23:59,673 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2023-02-16 01:23:59,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 01:23:59,675 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-02-16 01:23:59,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:23:59,675 INFO L225 Difference]: With dead ends: 56 [2023-02-16 01:23:59,675 INFO L226 Difference]: Without dead ends: 54 [2023-02-16 01:23:59,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:23:59,676 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 30 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:23:59,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 103 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:23:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-16 01:23:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2023-02-16 01:23:59,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:59,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2023-02-16 01:23:59,681 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 38 [2023-02-16 01:23:59,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:23:59,681 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2023-02-16 01:23:59,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:23:59,681 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2023-02-16 01:23:59,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-16 01:23:59,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:23:59,682 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:23:59,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-16 01:23:59,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:23:59,887 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:23:59,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:23:59,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1327501635, now seen corresponding path program 6 times [2023-02-16 01:23:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:23:59,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645796828] [2023-02-16 01:23:59,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:23:59,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:23:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:00,021 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 57 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:00,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645796828] [2023-02-16 01:24:00,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645796828] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:00,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128396123] [2023-02-16 01:24:00,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:24:00,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:00,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:00,023 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) [2023-02-16 01:24:00,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-16 01:24:00,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-16 01:24:00,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:00,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-16 01:24:00,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:00,207 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:00,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 72 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:00,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128396123] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:00,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:00,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2023-02-16 01:24:00,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851920958] [2023-02-16 01:24:00,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:00,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 01:24:00,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:00,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 01:24:00,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2023-02-16 01:24:00,310 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2023-02-16 01:24:00,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:00,511 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2023-02-16 01:24:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 01:24:00,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) Word has length 46 [2023-02-16 01:24:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:00,511 INFO L225 Difference]: With dead ends: 133 [2023-02-16 01:24:00,512 INFO L226 Difference]: Without dead ends: 79 [2023-02-16 01:24:00,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 72 SyntacticMatches, 9 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=1102, Unknown=0, NotChecked=0, Total=1482 [2023-02-16 01:24:00,513 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 96 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:00,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 158 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-16 01:24:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 51. [2023-02-16 01:24:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 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) [2023-02-16 01:24:00,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2023-02-16 01:24:00,517 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2023-02-16 01:24:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:00,518 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2023-02-16 01:24:00,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3461538461538463) internal successors, (87), 26 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) [2023-02-16 01:24:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2023-02-16 01:24:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-16 01:24:00,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:00,528 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:00,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:00,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:00,728 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:00,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:00,729 INFO L85 PathProgramCache]: Analyzing trace with hash 359898061, now seen corresponding path program 7 times [2023-02-16 01:24:00,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:00,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155296227] [2023-02-16 01:24:00,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:00,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 42 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:00,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:00,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155296227] [2023-02-16 01:24:00,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155296227] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:00,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103364599] [2023-02-16 01:24:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:24:00,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:00,949 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) [2023-02-16 01:24:00,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-16 01:24:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:01,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 01:24:01,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:01,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:01,139 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 56 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:01,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103364599] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:01,139 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:01,139 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2023-02-16 01:24:01,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750240160] [2023-02-16 01:24:01,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:01,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-16 01:24:01,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:01,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-16 01:24:01,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-02-16 01:24:01,142 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2023-02-16 01:24:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:01,226 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2023-02-16 01:24:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-16 01:24:01,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) Word has length 50 [2023-02-16 01:24:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:01,228 INFO L225 Difference]: With dead ends: 68 [2023-02-16 01:24:01,228 INFO L226 Difference]: Without dead ends: 66 [2023-02-16 01:24:01,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 91 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2023-02-16 01:24:01,229 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:01,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 103 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:24:01,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-02-16 01:24:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2023-02-16 01:24:01,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:01,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2023-02-16 01:24:01,236 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 50 [2023-02-16 01:24:01,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:01,236 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2023-02-16 01:24:01,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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) [2023-02-16 01:24:01,237 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2023-02-16 01:24:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-16 01:24:01,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:01,237 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:01,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-16 01:24:01,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:01,442 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:01,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:01,443 INFO L85 PathProgramCache]: Analyzing trace with hash -968765261, now seen corresponding path program 8 times [2023-02-16 01:24:01,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:01,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944032240] [2023-02-16 01:24:01,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:01,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:01,732 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 107 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:01,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:01,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944032240] [2023-02-16 01:24:01,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944032240] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:01,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441828253] [2023-02-16 01:24:01,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:24:01,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:01,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:01,734 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) [2023-02-16 01:24:01,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-16 01:24:01,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:24:01,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-16 01:24:01,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:01,956 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:01,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:02,094 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 126 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:02,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441828253] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:02,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:02,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 29 [2023-02-16 01:24:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118499600] [2023-02-16 01:24:02,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:02,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-16 01:24:02,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-16 01:24:02,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2023-02-16 01:24:02,098 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:02,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:02,232 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2023-02-16 01:24:02,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-16 01:24:02,232 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 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 58 [2023-02-16 01:24:02,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:02,233 INFO L225 Difference]: With dead ends: 130 [2023-02-16 01:24:02,233 INFO L226 Difference]: Without dead ends: 93 [2023-02-16 01:24:02,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 92 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=993, Unknown=0, NotChecked=0, Total=1332 [2023-02-16 01:24:02,234 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 88 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:02,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 128 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:02,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-02-16 01:24:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2023-02-16 01:24:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:02,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2023-02-16 01:24:02,242 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 58 [2023-02-16 01:24:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:02,243 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2023-02-16 01:24:02,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:02,243 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2023-02-16 01:24:02,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-16 01:24:02,244 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:02,244 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:02,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:02,448 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,SelfDestructingSolverStorable10 [2023-02-16 01:24:02,449 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:02,449 INFO L85 PathProgramCache]: Analyzing trace with hash 85268760, now seen corresponding path program 9 times [2023-02-16 01:24:02,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:02,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050956089] [2023-02-16 01:24:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 107 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:02,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050956089] [2023-02-16 01:24:02,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050956089] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:02,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079040237] [2023-02-16 01:24:02,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:24:02,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:02,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:02,721 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) [2023-02-16 01:24:02,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-16 01:24:02,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-16 01:24:02,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:02,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-16 01:24:02,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:02,931 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:02,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 128 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:03,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079040237] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:03,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:03,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 31 [2023-02-16 01:24:03,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962045862] [2023-02-16 01:24:03,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:03,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-16 01:24:03,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:03,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-16 01:24:03,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2023-02-16 01:24:03,051 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:03,216 INFO L93 Difference]: Finished difference Result 138 states and 160 transitions. [2023-02-16 01:24:03,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-16 01:24:03,216 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 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 60 [2023-02-16 01:24:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:03,217 INFO L225 Difference]: With dead ends: 138 [2023-02-16 01:24:03,217 INFO L226 Difference]: Without dead ends: 99 [2023-02-16 01:24:03,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 93 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=1155, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 01:24:03,218 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 120 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:03,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 184 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:03,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-16 01:24:03,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 63. [2023-02-16 01:24:03,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:03,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2023-02-16 01:24:03,222 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 60 [2023-02-16 01:24:03,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:03,222 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2023-02-16 01:24:03,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.225806451612903) internal successors, (100), 31 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:03,223 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2023-02-16 01:24:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-02-16 01:24:03,223 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:03,223 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:03,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:03,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:03,428 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:03,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:03,428 INFO L85 PathProgramCache]: Analyzing trace with hash -600318915, now seen corresponding path program 10 times [2023-02-16 01:24:03,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:03,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553844551] [2023-02-16 01:24:03,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:03,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 72 proven. 146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:03,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:03,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553844551] [2023-02-16 01:24:03,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553844551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:03,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410103744] [2023-02-16 01:24:03,593 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:24:03,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:03,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:03,594 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) [2023-02-16 01:24:03,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-16 01:24:03,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:24:03,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:03,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-16 01:24:03,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:03,709 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:03,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:03,840 INFO L134 CoverageAnalysis]: Checked inductivity of 218 backedges. 90 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:03,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410103744] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:03,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:03,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2023-02-16 01:24:03,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922683748] [2023-02-16 01:24:03,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:03,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-16 01:24:03,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:03,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-16 01:24:03,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2023-02-16 01:24:03,842 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2023-02-16 01:24:03,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:03,937 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2023-02-16 01:24:03,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 01:24:03,937 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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 62 [2023-02-16 01:24:03,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:03,937 INFO L225 Difference]: With dead ends: 80 [2023-02-16 01:24:03,937 INFO L226 Difference]: Without dead ends: 78 [2023-02-16 01:24:03,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 113 SyntacticMatches, 16 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2023-02-16 01:24:03,938 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 76 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:03,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 107 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:24:03,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-16 01:24:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2023-02-16 01:24:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2023-02-16 01:24:03,946 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 62 [2023-02-16 01:24:03,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:03,947 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2023-02-16 01:24:03,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.3125) internal successors, (85), 16 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) [2023-02-16 01:24:03,947 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2023-02-16 01:24:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-16 01:24:03,950 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:03,950 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:03,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-16 01:24:04,154 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,SelfDestructingSolverStorable12 [2023-02-16 01:24:04,154 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2101960413, now seen corresponding path program 11 times [2023-02-16 01:24:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:04,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754227695] [2023-02-16 01:24:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:04,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 173 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:04,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754227695] [2023-02-16 01:24:04,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754227695] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:04,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182811059] [2023-02-16 01:24:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:24:04,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:04,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:04,437 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) [2023-02-16 01:24:04,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-16 01:24:04,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-16 01:24:04,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:04,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-16 01:24:04,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:04,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 200 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:04,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182811059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:04,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:04,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2023-02-16 01:24:04,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046095527] [2023-02-16 01:24:04,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:04,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 01:24:04,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:04,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 01:24:04,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1066, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 01:24:04,945 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:05,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:05,245 INFO L93 Difference]: Finished difference Result 205 states and 232 transitions. [2023-02-16 01:24:05,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 01:24:05,246 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 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 70 [2023-02-16 01:24:05,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:05,246 INFO L225 Difference]: With dead ends: 205 [2023-02-16 01:24:05,246 INFO L226 Difference]: Without dead ends: 119 [2023-02-16 01:24:05,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 108 SyntacticMatches, 17 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=856, Invalid=2566, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 01:24:05,248 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 162 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:05,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 238 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:05,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-16 01:24:05,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 75. [2023-02-16 01:24:05,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:05,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2023-02-16 01:24:05,252 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2023-02-16 01:24:05,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:05,252 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2023-02-16 01:24:05,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3421052631578947) internal successors, (127), 38 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:05,253 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2023-02-16 01:24:05,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-02-16 01:24:05,253 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:05,253 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:05,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:05,458 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,SelfDestructingSolverStorable13 [2023-02-16 01:24:05,458 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:05,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:05,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1953124947, now seen corresponding path program 12 times [2023-02-16 01:24:05,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:05,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863183992] [2023-02-16 01:24:05,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:05,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:05,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 110 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:05,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:05,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863183992] [2023-02-16 01:24:05,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863183992] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:05,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944696769] [2023-02-16 01:24:05,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:24:05,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:05,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:05,682 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) [2023-02-16 01:24:05,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-16 01:24:05,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2023-02-16 01:24:05,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:05,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 01:24:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:05,812 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:05,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 132 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:05,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944696769] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:05,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:05,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2023-02-16 01:24:05,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197807153] [2023-02-16 01:24:05,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:05,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-16 01:24:05,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:05,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-16 01:24:05,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2023-02-16 01:24:05,955 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:06,081 INFO L93 Difference]: Finished difference Result 92 states and 96 transitions. [2023-02-16 01:24:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-16 01:24:06,082 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 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 [2023-02-16 01:24:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:06,082 INFO L225 Difference]: With dead ends: 92 [2023-02-16 01:24:06,082 INFO L226 Difference]: Without dead ends: 90 [2023-02-16 01:24:06,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 135 SyntacticMatches, 20 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=352, Invalid=640, Unknown=0, NotChecked=0, Total=992 [2023-02-16 01:24:06,083 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 90 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:06,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 119 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:24:06,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-02-16 01:24:06,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2023-02-16 01:24:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2023-02-16 01:24:06,087 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 74 [2023-02-16 01:24:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:06,087 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2023-02-16 01:24:06,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.388888888888889) internal successors, (97), 18 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:06,087 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2023-02-16 01:24:06,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-02-16 01:24:06,088 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:06,088 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:06,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:06,292 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,SelfDestructingSolverStorable14 [2023-02-16 01:24:06,293 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:06,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:06,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1101267603, now seen corresponding path program 13 times [2023-02-16 01:24:06,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006202788] [2023-02-16 01:24:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:06,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:06,632 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 255 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:06,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006202788] [2023-02-16 01:24:06,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006202788] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:06,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65899126] [2023-02-16 01:24:06,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:24:06,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:06,634 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) [2023-02-16 01:24:06,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-16 01:24:06,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:06,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-16 01:24:06,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:07,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:07,189 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 286 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:07,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65899126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:07,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:07,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 41 [2023-02-16 01:24:07,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497200351] [2023-02-16 01:24:07,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:07,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-16 01:24:07,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:07,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-16 01:24:07,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1259, Unknown=0, NotChecked=0, Total=1640 [2023-02-16 01:24:07,190 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 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) [2023-02-16 01:24:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:07,340 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2023-02-16 01:24:07,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-16 01:24:07,340 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 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 82 [2023-02-16 01:24:07,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:07,341 INFO L225 Difference]: With dead ends: 186 [2023-02-16 01:24:07,341 INFO L226 Difference]: Without dead ends: 133 [2023-02-16 01:24:07,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 128 SyntacticMatches, 22 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=695, Invalid=2061, Unknown=0, NotChecked=0, Total=2756 [2023-02-16 01:24:07,342 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 165 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:07,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [165 Valid, 231 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:07,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-02-16 01:24:07,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 85. [2023-02-16 01:24:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2023-02-16 01:24:07,346 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 82 [2023-02-16 01:24:07,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:07,346 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2023-02-16 01:24:07,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.3658536585365852) internal successors, (138), 41 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) [2023-02-16 01:24:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2023-02-16 01:24:07,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-16 01:24:07,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:07,347 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:07,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:07,547 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,SelfDestructingSolverStorable15 [2023-02-16 01:24:07,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:07,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:07,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1272075272, now seen corresponding path program 14 times [2023-02-16 01:24:07,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:07,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837952370] [2023-02-16 01:24:07,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:07,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:07,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 255 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:07,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837952370] [2023-02-16 01:24:07,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837952370] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:07,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379443599] [2023-02-16 01:24:07,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:24:07,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:07,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:07,945 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) [2023-02-16 01:24:07,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-16 01:24:08,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:24:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:08,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-16 01:24:08,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:08,347 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 288 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:08,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:08,581 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 288 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:08,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379443599] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:08,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:08,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 43 [2023-02-16 01:24:08,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44593550] [2023-02-16 01:24:08,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:08,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-16 01:24:08,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:08,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-16 01:24:08,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=1383, Unknown=0, NotChecked=0, Total=1806 [2023-02-16 01:24:08,583 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 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) [2023-02-16 01:24:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:08,831 INFO L93 Difference]: Finished difference Result 194 states and 224 transitions. [2023-02-16 01:24:08,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-16 01:24:08,831 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 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 84 [2023-02-16 01:24:08,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:08,832 INFO L225 Difference]: With dead ends: 194 [2023-02-16 01:24:08,832 INFO L226 Difference]: Without dead ends: 139 [2023-02-16 01:24:08,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 129 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=789, Invalid=2291, Unknown=0, NotChecked=0, Total=3080 [2023-02-16 01:24:08,833 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 183 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 366 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:08,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 280 Invalid, 366 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-16 01:24:08,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2023-02-16 01:24:08,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:08,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2023-02-16 01:24:08,837 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 84 [2023-02-16 01:24:08,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:08,838 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2023-02-16 01:24:08,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.255813953488372) internal successors, (140), 43 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) [2023-02-16 01:24:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2023-02-16 01:24:08,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-02-16 01:24:08,838 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:08,838 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:08,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-16 01:24:09,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:09,043 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:09,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:09,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1426943971, now seen corresponding path program 15 times [2023-02-16 01:24:09,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:09,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710032291] [2023-02-16 01:24:09,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:09,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:09,294 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 156 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:09,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:09,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710032291] [2023-02-16 01:24:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710032291] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:09,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876163158] [2023-02-16 01:24:09,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:24:09,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:09,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:09,296 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) [2023-02-16 01:24:09,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-16 01:24:09,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2023-02-16 01:24:09,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:09,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-16 01:24:09,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 182 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:09,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 470 backedges. 182 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:09,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876163158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:09,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:09,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2023-02-16 01:24:09,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691613274] [2023-02-16 01:24:09,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:09,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-16 01:24:09,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:09,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-16 01:24:09,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2023-02-16 01:24:09,674 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:09,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:09,835 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2023-02-16 01:24:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-16 01:24:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 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 86 [2023-02-16 01:24:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:09,836 INFO L225 Difference]: With dead ends: 104 [2023-02-16 01:24:09,836 INFO L226 Difference]: Without dead ends: 102 [2023-02-16 01:24:09,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 157 SyntacticMatches, 24 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=811, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 01:24:09,836 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 56 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:09,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 166 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:09,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-02-16 01:24:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 95. [2023-02-16 01:24:09,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2023-02-16 01:24:09,841 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 86 [2023-02-16 01:24:09,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:09,841 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2023-02-16 01:24:09,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.45) internal successors, (109), 20 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2023-02-16 01:24:09,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-02-16 01:24:09,842 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:09,842 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:09,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-16 01:24:10,042 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,SelfDestructingSolverStorable17 [2023-02-16 01:24:10,043 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:10,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:10,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1930463997, now seen corresponding path program 16 times [2023-02-16 01:24:10,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:10,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858303856] [2023-02-16 01:24:10,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:10,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:10,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:10,457 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 353 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:10,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:10,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858303856] [2023-02-16 01:24:10,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858303856] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:10,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021712148] [2023-02-16 01:24:10,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:24:10,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:10,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:10,463 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) [2023-02-16 01:24:10,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-16 01:24:10,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:24:10,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:10,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-16 01:24:10,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 392 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:10,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 392 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:11,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021712148] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:11,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:11,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2023-02-16 01:24:11,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2806416] [2023-02-16 01:24:11,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:11,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-16 01:24:11,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:11,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-16 01:24:11,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=580, Invalid=1870, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 01:24:11,242 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:11,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:11,673 INFO L93 Difference]: Finished difference Result 277 states and 312 transitions. [2023-02-16 01:24:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 01:24:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 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 94 [2023-02-16 01:24:11,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:11,674 INFO L225 Difference]: With dead ends: 277 [2023-02-16 01:24:11,675 INFO L226 Difference]: Without dead ends: 159 [2023-02-16 01:24:11,676 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 144 SyntacticMatches, 25 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1989 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2023-02-16 01:24:11,676 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 213 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 430 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:11,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 430 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:24:11,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-02-16 01:24:11,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 99. [2023-02-16 01:24:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 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) [2023-02-16 01:24:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2023-02-16 01:24:11,684 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 94 [2023-02-16 01:24:11,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:11,685 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2023-02-16 01:24:11,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.34) internal successors, (167), 50 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:11,686 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2023-02-16 01:24:11,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-02-16 01:24:11,688 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:11,688 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:11,697 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:11,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:11,893 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash 779355021, now seen corresponding path program 17 times [2023-02-16 01:24:11,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:11,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973915187] [2023-02-16 01:24:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:11,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 210 proven. 422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973915187] [2023-02-16 01:24:12,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973915187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:12,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142047148] [2023-02-16 01:24:12,175 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:24:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:12,176 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) [2023-02-16 01:24:12,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-16 01:24:12,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-16 01:24:12,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-16 01:24:12,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 240 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:12,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 240 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:12,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142047148] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:12,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:12,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2023-02-16 01:24:12,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449340105] [2023-02-16 01:24:12,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:12,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-16 01:24:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:12,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-16 01:24:12,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2023-02-16 01:24:12,578 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:12,752 INFO L93 Difference]: Finished difference Result 116 states and 120 transitions. [2023-02-16 01:24:12,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-16 01:24:12,753 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 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 [2023-02-16 01:24:12,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:12,753 INFO L225 Difference]: With dead ends: 116 [2023-02-16 01:24:12,753 INFO L226 Difference]: Without dead ends: 114 [2023-02-16 01:24:12,754 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 179 SyntacticMatches, 28 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=558, Invalid=1002, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 01:24:12,754 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 110 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:12,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 146 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-16 01:24:12,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2023-02-16 01:24:12,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:12,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2023-02-16 01:24:12,762 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 98 [2023-02-16 01:24:12,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:12,762 INFO L495 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2023-02-16 01:24:12,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.5) internal successors, (121), 22 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:12,762 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2023-02-16 01:24:12,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-02-16 01:24:12,763 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:12,763 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:12,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:12,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:12,968 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:12,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1690404749, now seen corresponding path program 18 times [2023-02-16 01:24:12,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:12,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013936455] [2023-02-16 01:24:12,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:12,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:12,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 467 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:13,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013936455] [2023-02-16 01:24:13,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013936455] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:13,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452189847] [2023-02-16 01:24:13,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:24:13,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:13,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:13,468 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) [2023-02-16 01:24:13,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-16 01:24:13,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-02-16 01:24:13,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-16 01:24:13,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 512 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:14,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:14,447 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 512 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:14,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452189847] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:14,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:14,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2023-02-16 01:24:14,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280494164] [2023-02-16 01:24:14,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:14,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-16 01:24:14,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:14,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-16 01:24:14,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=724, Invalid=2356, Unknown=0, NotChecked=0, Total=3080 [2023-02-16 01:24:14,449 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:15,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:15,046 INFO L93 Difference]: Finished difference Result 313 states and 352 transitions. [2023-02-16 01:24:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-16 01:24:15,047 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 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 106 [2023-02-16 01:24:15,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:15,047 INFO L225 Difference]: With dead ends: 313 [2023-02-16 01:24:15,047 INFO L226 Difference]: Without dead ends: 179 [2023-02-16 01:24:15,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 162 SyntacticMatches, 29 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1930, Invalid=5902, Unknown=0, NotChecked=0, Total=7832 [2023-02-16 01:24:15,049 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 265 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:15,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 463 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:24:15,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-02-16 01:24:15,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 111. [2023-02-16 01:24:15,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 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) [2023-02-16 01:24:15,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2023-02-16 01:24:15,055 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 106 [2023-02-16 01:24:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:15,056 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2023-02-16 01:24:15,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.3392857142857144) internal successors, (187), 56 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:15,056 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2023-02-16 01:24:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-02-16 01:24:15,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:15,056 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:15,065 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-02-16 01:24:15,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:15,257 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:15,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:15,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1459587069, now seen corresponding path program 19 times [2023-02-16 01:24:15,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:15,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695157154] [2023-02-16 01:24:15,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:15,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 272 proven. 546 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:15,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695157154] [2023-02-16 01:24:15,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695157154] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:15,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488965500] [2023-02-16 01:24:15,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:24:15,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:15,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:15,690 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) [2023-02-16 01:24:15,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-16 01:24:15,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:15,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 01:24:15,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 306 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:15,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:16,189 INFO L134 CoverageAnalysis]: Checked inductivity of 818 backedges. 306 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:16,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488965500] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:16,189 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:16,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 24 [2023-02-16 01:24:16,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721823457] [2023-02-16 01:24:16,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:16,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-16 01:24:16,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:16,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-16 01:24:16,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2023-02-16 01:24:16,190 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:16,349 INFO L93 Difference]: Finished difference Result 128 states and 132 transitions. [2023-02-16 01:24:16,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-02-16 01:24:16,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 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 110 [2023-02-16 01:24:16,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:16,352 INFO L225 Difference]: With dead ends: 128 [2023-02-16 01:24:16,352 INFO L226 Difference]: Without dead ends: 126 [2023-02-16 01:24:16,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 201 SyntacticMatches, 32 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=679, Invalid=1213, Unknown=0, NotChecked=0, Total=1892 [2023-02-16 01:24:16,353 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 122 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:16,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 166 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:24:16,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-16 01:24:16,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 119. [2023-02-16 01:24:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:16,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2023-02-16 01:24:16,360 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 110 [2023-02-16 01:24:16,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:16,360 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2023-02-16 01:24:16,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.541666666666667) internal successors, (133), 24 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:16,361 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2023-02-16 01:24:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-16 01:24:16,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:16,361 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:16,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:16,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:16,567 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:16,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:16,568 INFO L85 PathProgramCache]: Analyzing trace with hash 804687075, now seen corresponding path program 20 times [2023-02-16 01:24:16,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:16,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354725716] [2023-02-16 01:24:16,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:16,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 597 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354725716] [2023-02-16 01:24:17,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354725716] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:17,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457203893] [2023-02-16 01:24:17,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:24:17,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:17,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:17,063 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) [2023-02-16 01:24:17,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-16 01:24:17,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:24:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-16 01:24:17,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:17,725 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 646 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:17,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 646 proven. 306 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:18,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457203893] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:18,006 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:18,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 59 [2023-02-16 01:24:18,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738106601] [2023-02-16 01:24:18,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:18,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-16 01:24:18,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:18,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-16 01:24:18,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=783, Invalid=2639, Unknown=0, NotChecked=0, Total=3422 [2023-02-16 01:24:18,008 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 59 states, 59 states have (on average 3.3559322033898304) internal successors, (198), 59 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:18,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:18,326 INFO L93 Difference]: Finished difference Result 270 states and 310 transitions. [2023-02-16 01:24:18,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-16 01:24:18,327 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.3559322033898304) internal successors, (198), 59 states have internal predecessors, (198), 0 states have call successors, (0), 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 118 [2023-02-16 01:24:18,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:18,328 INFO L225 Difference]: With dead ends: 270 [2023-02-16 01:24:18,328 INFO L226 Difference]: Without dead ends: 193 [2023-02-16 01:24:18,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 182 SyntacticMatches, 34 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1469, Invalid=4383, Unknown=0, NotChecked=0, Total=5852 [2023-02-16 01:24:18,329 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 226 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:18,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 398 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:24:18,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-16 01:24:18,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 121. [2023-02-16 01:24:18,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:18,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2023-02-16 01:24:18,337 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 118 [2023-02-16 01:24:18,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:18,337 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2023-02-16 01:24:18,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.3559322033898304) internal successors, (198), 59 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:18,337 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2023-02-16 01:24:18,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-16 01:24:18,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:18,338 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:18,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:18,543 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,SelfDestructingSolverStorable22 [2023-02-16 01:24:18,543 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1574315976, now seen corresponding path program 21 times [2023-02-16 01:24:18,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171713098] [2023-02-16 01:24:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:18,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:19,191 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 597 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:19,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:19,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171713098] [2023-02-16 01:24:19,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171713098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:19,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783612065] [2023-02-16 01:24:19,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:24:19,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:19,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:19,193 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) [2023-02-16 01:24:19,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-16 01:24:19,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-02-16 01:24:19,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:19,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-16 01:24:19,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 648 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:19,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:20,357 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 648 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:20,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783612065] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:20,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:20,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 61 [2023-02-16 01:24:20,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209315755] [2023-02-16 01:24:20,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:20,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2023-02-16 01:24:20,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:20,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2023-02-16 01:24:20,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=843, Invalid=2817, Unknown=0, NotChecked=0, Total=3660 [2023-02-16 01:24:20,359 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 61 states, 61 states have (on average 3.278688524590164) internal successors, (200), 61 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:20,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:20,734 INFO L93 Difference]: Finished difference Result 278 states and 320 transitions. [2023-02-16 01:24:20,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-16 01:24:20,735 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.278688524590164) internal successors, (200), 61 states have internal predecessors, (200), 0 states have call successors, (0), 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 120 [2023-02-16 01:24:20,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:20,736 INFO L225 Difference]: With dead ends: 278 [2023-02-16 01:24:20,736 INFO L226 Difference]: Without dead ends: 199 [2023-02-16 01:24:20,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 183 SyntacticMatches, 36 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2332 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1605, Invalid=4715, Unknown=0, NotChecked=0, Total=6320 [2023-02-16 01:24:20,737 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 257 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:20,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 380 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:24:20,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-02-16 01:24:20,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 123. [2023-02-16 01:24:20,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 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) [2023-02-16 01:24:20,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2023-02-16 01:24:20,745 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 120 [2023-02-16 01:24:20,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:20,745 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2023-02-16 01:24:20,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.278688524590164) internal successors, (200), 61 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:20,746 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2023-02-16 01:24:20,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-02-16 01:24:20,746 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:20,747 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:20,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:20,949 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,SelfDestructingSolverStorable23 [2023-02-16 01:24:20,949 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:20,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:20,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1841652371, now seen corresponding path program 22 times [2023-02-16 01:24:20,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:20,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142746815] [2023-02-16 01:24:20,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:20,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:20,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:21,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 342 proven. 686 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:21,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:21,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142746815] [2023-02-16 01:24:21,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142746815] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:21,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510577130] [2023-02-16 01:24:21,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:24:21,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:21,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:21,370 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) [2023-02-16 01:24:21,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-16 01:24:21,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:24:21,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:21,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-16 01:24:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 380 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:21,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:21,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1028 backedges. 380 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:21,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510577130] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:21,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:21,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 26 [2023-02-16 01:24:21,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180002119] [2023-02-16 01:24:21,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:21,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-16 01:24:21,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:21,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-16 01:24:21,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2023-02-16 01:24:21,776 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:21,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:21,928 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2023-02-16 01:24:21,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 01:24:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 0 states have call successors, (0), 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 122 [2023-02-16 01:24:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:21,934 INFO L225 Difference]: With dead ends: 140 [2023-02-16 01:24:21,934 INFO L226 Difference]: Without dead ends: 138 [2023-02-16 01:24:21,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 223 SyntacticMatches, 36 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=812, Invalid=1444, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 01:24:21,936 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 132 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:21,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 186 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-16 01:24:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-02-16 01:24:21,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2023-02-16 01:24:21,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:21,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2023-02-16 01:24:21,963 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 122 [2023-02-16 01:24:21,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:21,964 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2023-02-16 01:24:21,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.576923076923077) internal successors, (145), 26 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2023-02-16 01:24:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-02-16 01:24:21,968 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:21,969 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:21,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:22,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:22,169 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:22,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:22,169 INFO L85 PathProgramCache]: Analyzing trace with hash 2067608147, now seen corresponding path program 23 times [2023-02-16 01:24:22,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:22,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906911223] [2023-02-16 01:24:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:22,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:22,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 743 proven. 437 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:22,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906911223] [2023-02-16 01:24:22,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906911223] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:22,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613354794] [2023-02-16 01:24:22,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:24:22,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:22,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:22,918 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) [2023-02-16 01:24:22,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-16 01:24:23,002 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2023-02-16 01:24:23,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:23,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 43 conjunts are in the unsatisfiable core [2023-02-16 01:24:23,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 800 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:23,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 800 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:24,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613354794] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:24,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:24,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 68 [2023-02-16 01:24:24,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183011012] [2023-02-16 01:24:24,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:24,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-16 01:24:24,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:24,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-16 01:24:24,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1060, Invalid=3496, Unknown=0, NotChecked=0, Total=4556 [2023-02-16 01:24:24,276 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:25,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:25,007 INFO L93 Difference]: Finished difference Result 385 states and 432 transitions. [2023-02-16 01:24:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-16 01:24:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-02-16 01:24:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:25,008 INFO L225 Difference]: With dead ends: 385 [2023-02-16 01:24:25,008 INFO L226 Difference]: Without dead ends: 219 [2023-02-16 01:24:25,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 198 SyntacticMatches, 37 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3870 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2886, Invalid=8886, Unknown=0, NotChecked=0, Total=11772 [2023-02-16 01:24:25,011 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 408 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:25,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 601 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 674 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:24:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-02-16 01:24:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 135. [2023-02-16 01:24:25,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 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) [2023-02-16 01:24:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2023-02-16 01:24:25,035 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 130 [2023-02-16 01:24:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:25,035 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2023-02-16 01:24:25,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.338235294117647) internal successors, (227), 68 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2023-02-16 01:24:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-16 01:24:25,036 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:25,036 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:25,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:25,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:25,241 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:25,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1519043549, now seen corresponding path program 24 times [2023-02-16 01:24:25,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:25,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042070785] [2023-02-16 01:24:25,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:25,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 420 proven. 842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:25,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:25,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042070785] [2023-02-16 01:24:25,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042070785] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:25,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723668699] [2023-02-16 01:24:25,741 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:24:25,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:25,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:25,742 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) [2023-02-16 01:24:25,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-16 01:24:25,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-02-16 01:24:25,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:25,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 01:24:25,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 462 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:26,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:26,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1262 backedges. 462 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:26,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723668699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:26,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:26,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2023-02-16 01:24:26,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499042637] [2023-02-16 01:24:26,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:26,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-16 01:24:26,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:26,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-16 01:24:26,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2023-02-16 01:24:26,409 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:26,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:26,710 INFO L93 Difference]: Finished difference Result 152 states and 156 transitions. [2023-02-16 01:24:26,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-16 01:24:26,711 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2023-02-16 01:24:26,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:26,711 INFO L225 Difference]: With dead ends: 152 [2023-02-16 01:24:26,711 INFO L226 Difference]: Without dead ends: 150 [2023-02-16 01:24:26,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 245 SyntacticMatches, 40 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=957, Invalid=1695, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 01:24:26,712 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 146 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:26,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 211 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:26,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-16 01:24:26,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 143. [2023-02-16 01:24:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:26,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2023-02-16 01:24:26,731 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 134 [2023-02-16 01:24:26,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:26,731 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2023-02-16 01:24:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.607142857142857) internal successors, (157), 28 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:26,731 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2023-02-16 01:24:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-02-16 01:24:26,733 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:26,733 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:26,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-02-16 01:24:26,933 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,SelfDestructingSolverStorable26 [2023-02-16 01:24:26,934 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:26,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash -101193533, now seen corresponding path program 25 times [2023-02-16 01:24:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:26,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529778489] [2023-02-16 01:24:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:26,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:27,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 905 proven. 525 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:27,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:27,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529778489] [2023-02-16 01:24:27,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529778489] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:27,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082474040] [2023-02-16 01:24:27,669 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:24:27,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:27,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:27,686 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) [2023-02-16 01:24:27,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-16 01:24:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:27,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-16 01:24:27,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 966 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:28,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 966 proven. 462 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:28,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082474040] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:28,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:28,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 71 [2023-02-16 01:24:28,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742723978] [2023-02-16 01:24:28,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:28,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-16 01:24:28,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:28,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-16 01:24:28,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1131, Invalid=3839, Unknown=0, NotChecked=0, Total=4970 [2023-02-16 01:24:28,629 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 71 states, 71 states have (on average 3.352112676056338) internal successors, (238), 71 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:28,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:28,986 INFO L93 Difference]: Finished difference Result 326 states and 374 transitions. [2023-02-16 01:24:28,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-16 01:24:28,986 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.352112676056338) internal successors, (238), 71 states have internal predecessors, (238), 0 states have call successors, (0), 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 142 [2023-02-16 01:24:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:28,987 INFO L225 Difference]: With dead ends: 326 [2023-02-16 01:24:28,987 INFO L226 Difference]: Without dead ends: 233 [2023-02-16 01:24:28,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 218 SyntacticMatches, 42 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3187 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2145, Invalid=6411, Unknown=0, NotChecked=0, Total=8556 [2023-02-16 01:24:28,988 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 331 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:28,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 459 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:28,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-16 01:24:28,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 145. [2023-02-16 01:24:28,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2023-02-16 01:24:28,998 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 142 [2023-02-16 01:24:28,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:28,998 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2023-02-16 01:24:28,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.352112676056338) internal successors, (238), 71 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:28,998 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2023-02-16 01:24:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-16 01:24:29,001 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:29,001 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:29,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-02-16 01:24:29,206 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,SelfDestructingSolverStorable27 [2023-02-16 01:24:29,206 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:29,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:29,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2007079768, now seen corresponding path program 26 times [2023-02-16 01:24:29,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:29,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311729836] [2023-02-16 01:24:29,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:29,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:29,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 905 proven. 569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311729836] [2023-02-16 01:24:29,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311729836] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:29,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16901915] [2023-02-16 01:24:29,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:24:29,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:29,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:29,868 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) [2023-02-16 01:24:29,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-16 01:24:29,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:24:29,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-16 01:24:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 968 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:30,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 968 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:31,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16901915] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:31,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:31,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 73 [2023-02-16 01:24:31,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121975604] [2023-02-16 01:24:31,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:31,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-16 01:24:31,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-16 01:24:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=4053, Unknown=0, NotChecked=0, Total=5256 [2023-02-16 01:24:31,416 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 73 states, 73 states have (on average 3.287671232876712) internal successors, (240), 73 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:31,884 INFO L93 Difference]: Finished difference Result 334 states and 384 transitions. [2023-02-16 01:24:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-16 01:24:31,885 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.287671232876712) internal successors, (240), 73 states have internal predecessors, (240), 0 states have call successors, (0), 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 144 [2023-02-16 01:24:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:31,885 INFO L225 Difference]: With dead ends: 334 [2023-02-16 01:24:31,886 INFO L226 Difference]: Without dead ends: 239 [2023-02-16 01:24:31,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 219 SyntacticMatches, 44 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3380 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2309, Invalid=6811, Unknown=0, NotChecked=0, Total=9120 [2023-02-16 01:24:31,898 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 266 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:31,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 480 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 533 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:24:31,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-02-16 01:24:31,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 147. [2023-02-16 01:24:31,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 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) [2023-02-16 01:24:31,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2023-02-16 01:24:31,918 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 144 [2023-02-16 01:24:31,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:31,918 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2023-02-16 01:24:31,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.287671232876712) internal successors, (240), 73 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:31,919 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2023-02-16 01:24:31,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-02-16 01:24:31,919 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:31,920 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:31,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:32,125 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,SelfDestructingSolverStorable28 [2023-02-16 01:24:32,125 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:32,127 INFO L85 PathProgramCache]: Analyzing trace with hash 387283789, now seen corresponding path program 27 times [2023-02-16 01:24:32,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:32,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124200093] [2023-02-16 01:24:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:32,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 506 proven. 1014 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:32,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124200093] [2023-02-16 01:24:32,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124200093] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:32,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062503666] [2023-02-16 01:24:32,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:24:32,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:32,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:32,673 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) [2023-02-16 01:24:32,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-16 01:24:32,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-02-16 01:24:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:32,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-16 01:24:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 552 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:32,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:33,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 552 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:33,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062503666] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:33,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:33,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 30 [2023-02-16 01:24:33,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220851122] [2023-02-16 01:24:33,172 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:33,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-16 01:24:33,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:33,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-16 01:24:33,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2023-02-16 01:24:33,174 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 30 states, 30 states have (on average 5.633333333333334) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:33,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:33,377 INFO L93 Difference]: Finished difference Result 164 states and 168 transitions. [2023-02-16 01:24:33,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-02-16 01:24:33,378 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.633333333333334) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 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 146 [2023-02-16 01:24:33,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:33,379 INFO L225 Difference]: With dead ends: 164 [2023-02-16 01:24:33,379 INFO L226 Difference]: Without dead ends: 162 [2023-02-16 01:24:33,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 267 SyntacticMatches, 44 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1392 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1114, Invalid=1966, Unknown=0, NotChecked=0, Total=3080 [2023-02-16 01:24:33,379 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 162 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:33,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 213 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:33,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2023-02-16 01:24:33,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2023-02-16 01:24:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2023-02-16 01:24:33,390 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 146 [2023-02-16 01:24:33,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:33,390 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2023-02-16 01:24:33,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.633333333333334) internal successors, (169), 30 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:33,390 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2023-02-16 01:24:33,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-02-16 01:24:33,391 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:33,391 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:33,400 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:33,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:33,596 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:33,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:33,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1439445043, now seen corresponding path program 28 times [2023-02-16 01:24:33,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:33,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623840706] [2023-02-16 01:24:33,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:33,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1083 proven. 621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:34,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:34,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623840706] [2023-02-16 01:24:34,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623840706] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:34,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428220465] [2023-02-16 01:24:34,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:24:34,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:34,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:34,506 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) [2023-02-16 01:24:34,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-16 01:24:34,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:24:34,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:34,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 51 conjunts are in the unsatisfiable core [2023-02-16 01:24:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:35,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1152 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:35,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:36,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 1152 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:36,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428220465] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:36,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:36,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 80 [2023-02-16 01:24:36,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478252998] [2023-02-16 01:24:36,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:36,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-16 01:24:36,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:36,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-16 01:24:36,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=4860, Unknown=0, NotChecked=0, Total=6320 [2023-02-16 01:24:36,234 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 80 states, 80 states have (on average 3.3375) internal successors, (267), 80 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:37,297 INFO L93 Difference]: Finished difference Result 457 states and 512 transitions. [2023-02-16 01:24:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-02-16 01:24:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.3375) internal successors, (267), 80 states have internal predecessors, (267), 0 states have call successors, (0), 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 154 [2023-02-16 01:24:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:37,299 INFO L225 Difference]: With dead ends: 457 [2023-02-16 01:24:37,299 INFO L226 Difference]: Without dead ends: 259 [2023-02-16 01:24:37,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 234 SyntacticMatches, 45 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5464 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4034, Invalid=12478, Unknown=0, NotChecked=0, Total=16512 [2023-02-16 01:24:37,302 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 389 mSDsluCounter, 713 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 766 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:37,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 766 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:24:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2023-02-16 01:24:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 159. [2023-02-16 01:24:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2023-02-16 01:24:37,313 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 154 [2023-02-16 01:24:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:37,314 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2023-02-16 01:24:37,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.3375) internal successors, (267), 80 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2023-02-16 01:24:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2023-02-16 01:24:37,317 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:37,318 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:37,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:37,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:37,524 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:37,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:37,524 INFO L85 PathProgramCache]: Analyzing trace with hash -71285827, now seen corresponding path program 29 times [2023-02-16 01:24:37,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:37,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728158485] [2023-02-16 01:24:37,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:37,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:37,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:38,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 600 proven. 1202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:38,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728158485] [2023-02-16 01:24:38,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728158485] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:38,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487327568] [2023-02-16 01:24:38,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:24:38,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:38,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:38,144 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) [2023-02-16 01:24:38,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-16 01:24:38,249 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-02-16 01:24:38,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:38,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-16 01:24:38,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:38,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:38,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1802 backedges. 650 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:38,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487327568] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:38,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:38,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 32 [2023-02-16 01:24:38,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459417612] [2023-02-16 01:24:38,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:38,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-16 01:24:38,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:38,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-16 01:24:38,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2023-02-16 01:24:38,776 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:39,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:39,028 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2023-02-16 01:24:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-16 01:24:39,028 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 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 158 [2023-02-16 01:24:39,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:39,029 INFO L225 Difference]: With dead ends: 176 [2023-02-16 01:24:39,029 INFO L226 Difference]: Without dead ends: 174 [2023-02-16 01:24:39,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 289 SyntacticMatches, 48 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1614 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1283, Invalid=2257, Unknown=0, NotChecked=0, Total=3540 [2023-02-16 01:24:39,031 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 96 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:39,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 316 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:39,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-16 01:24:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 167. [2023-02-16 01:24:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2023-02-16 01:24:39,045 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 158 [2023-02-16 01:24:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:39,045 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2023-02-16 01:24:39,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.65625) internal successors, (181), 32 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2023-02-16 01:24:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-02-16 01:24:39,046 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:39,046 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:39,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:39,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:39,252 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:39,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:39,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1159694499, now seen corresponding path program 30 times [2023-02-16 01:24:39,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:39,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095964226] [2023-02-16 01:24:39,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:39,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:39,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1277 proven. 725 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:40,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:40,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095964226] [2023-02-16 01:24:40,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095964226] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:40,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862273873] [2023-02-16 01:24:40,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:24:40,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:40,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:40,087 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) [2023-02-16 01:24:40,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-16 01:24:40,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-02-16 01:24:40,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:40,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 611 conjuncts, 55 conjunts are in the unsatisfiable core [2023-02-16 01:24:40,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1352 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:40,929 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 1352 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:41,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862273873] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:41,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:41,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 86 [2023-02-16 01:24:41,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499424450] [2023-02-16 01:24:41,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:41,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-16 01:24:41,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:41,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-16 01:24:41,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5626, Unknown=0, NotChecked=0, Total=7310 [2023-02-16 01:24:41,513 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:42,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:42,364 INFO L93 Difference]: Finished difference Result 493 states and 552 transitions. [2023-02-16 01:24:42,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-16 01:24:42,365 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 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 166 [2023-02-16 01:24:42,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:42,366 INFO L225 Difference]: With dead ends: 493 [2023-02-16 01:24:42,366 INFO L226 Difference]: Without dead ends: 279 [2023-02-16 01:24:42,367 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 252 SyntacticMatches, 49 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6363 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4680, Invalid=14502, Unknown=0, NotChecked=0, Total=19182 [2023-02-16 01:24:42,368 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 404 mSDsluCounter, 781 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:42,368 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [404 Valid, 838 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:24:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-02-16 01:24:42,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 171. [2023-02-16 01:24:42,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:42,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2023-02-16 01:24:42,380 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 166 [2023-02-16 01:24:42,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:42,380 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2023-02-16 01:24:42,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3372093023255816) internal successors, (287), 86 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:42,381 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2023-02-16 01:24:42,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-02-16 01:24:42,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:42,381 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:42,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:42,587 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,SelfDestructingSolverStorable32 [2023-02-16 01:24:42,587 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:42,588 INFO L85 PathProgramCache]: Analyzing trace with hash -382690003, now seen corresponding path program 31 times [2023-02-16 01:24:42,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:42,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400114599] [2023-02-16 01:24:42,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:42,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:42,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 702 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:43,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:43,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400114599] [2023-02-16 01:24:43,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400114599] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:43,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488133716] [2023-02-16 01:24:43,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:24:43,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:43,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:43,272 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) [2023-02-16 01:24:43,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-16 01:24:43,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:43,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-16 01:24:43,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 756 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:43,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:44,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2108 backedges. 756 proven. 1352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:44,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488133716] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:44,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:44,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 34 [2023-02-16 01:24:44,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359460707] [2023-02-16 01:24:44,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:44,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-16 01:24:44,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:44,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-16 01:24:44,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2023-02-16 01:24:44,055 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:44,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:44,355 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2023-02-16 01:24:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-16 01:24:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 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 170 [2023-02-16 01:24:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:44,356 INFO L225 Difference]: With dead ends: 188 [2023-02-16 01:24:44,356 INFO L226 Difference]: Without dead ends: 186 [2023-02-16 01:24:44,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 311 SyntacticMatches, 52 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1852 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1464, Invalid=2568, Unknown=0, NotChecked=0, Total=4032 [2023-02-16 01:24:44,357 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 98 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:44,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 266 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-02-16 01:24:44,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2023-02-16 01:24:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2023-02-16 01:24:44,371 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 170 [2023-02-16 01:24:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:44,371 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2023-02-16 01:24:44,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.676470588235294) internal successors, (193), 34 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2023-02-16 01:24:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-16 01:24:44,372 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:44,372 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:44,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-16 01:24:44,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:44,577 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:44,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:44,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1796698643, now seen corresponding path program 32 times [2023-02-16 01:24:44,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:44,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654348962] [2023-02-16 01:24:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:44,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1487 proven. 837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:45,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654348962] [2023-02-16 01:24:45,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654348962] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:45,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630445187] [2023-02-16 01:24:45,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:24:45,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:45,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:45,649 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) [2023-02-16 01:24:45,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-16 01:24:45,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:24:45,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:45,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-16 01:24:45,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:46,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1566 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:46,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:47,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 1566 proven. 756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:24:47,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630445187] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:47,076 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:47,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 89 [2023-02-16 01:24:47,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876776755] [2023-02-16 01:24:47,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:47,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-16 01:24:47,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:47,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-16 01:24:47,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1773, Invalid=6059, Unknown=0, NotChecked=0, Total=7832 [2023-02-16 01:24:47,079 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:47,679 INFO L93 Difference]: Finished difference Result 410 states and 470 transitions. [2023-02-16 01:24:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-16 01:24:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 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 178 [2023-02-16 01:24:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:47,686 INFO L225 Difference]: With dead ends: 410 [2023-02-16 01:24:47,687 INFO L226 Difference]: Without dead ends: 293 [2023-02-16 01:24:47,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 272 SyntacticMatches, 54 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5071 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3399, Invalid=10173, Unknown=0, NotChecked=0, Total=13572 [2023-02-16 01:24:47,688 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 376 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:47,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 663 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:24:47,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-02-16 01:24:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 181. [2023-02-16 01:24:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 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) [2023-02-16 01:24:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2023-02-16 01:24:47,713 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 178 [2023-02-16 01:24:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:47,713 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2023-02-16 01:24:47,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.348314606741573) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2023-02-16 01:24:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-02-16 01:24:47,715 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:47,715 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:47,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:47,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:47,921 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:47,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1983684472, now seen corresponding path program 33 times [2023-02-16 01:24:47,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:47,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865841187] [2023-02-16 01:24:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1487 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:48,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:48,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865841187] [2023-02-16 01:24:48,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865841187] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:48,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622936968] [2023-02-16 01:24:48,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:24:48,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:48,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:48,960 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) [2023-02-16 01:24:48,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-16 01:24:49,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2023-02-16 01:24:49,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:49,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-16 01:24:49,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:50,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:51,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1568 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:51,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622936968] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:51,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:51,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 91 [2023-02-16 01:24:51,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171251526] [2023-02-16 01:24:51,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:51,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-02-16 01:24:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-02-16 01:24:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1863, Invalid=6327, Unknown=0, NotChecked=0, Total=8190 [2023-02-16 01:24:51,187 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:51,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:51,936 INFO L93 Difference]: Finished difference Result 418 states and 480 transitions. [2023-02-16 01:24:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-02-16 01:24:51,937 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2023-02-16 01:24:51,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:51,938 INFO L225 Difference]: With dead ends: 418 [2023-02-16 01:24:51,938 INFO L226 Difference]: Without dead ends: 299 [2023-02-16 01:24:51,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 273 SyntacticMatches, 56 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3605, Invalid=10675, Unknown=0, NotChecked=0, Total=14280 [2023-02-16 01:24:51,939 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 479 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 624 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:51,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 624 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:24:51,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-02-16 01:24:51,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 183. [2023-02-16 01:24:51,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2023-02-16 01:24:51,953 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 180 [2023-02-16 01:24:51,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:51,953 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2023-02-16 01:24:51,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.2967032967032965) internal successors, (300), 91 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:51,953 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2023-02-16 01:24:51,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-02-16 01:24:51,954 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:51,954 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:51,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-02-16 01:24:52,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-16 01:24:52,160 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:52,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:52,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1288439709, now seen corresponding path program 34 times [2023-02-16 01:24:52,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:52,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859471339] [2023-02-16 01:24:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:52,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:52,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 812 proven. 1626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:52,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:52,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859471339] [2023-02-16 01:24:52,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859471339] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:52,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879566710] [2023-02-16 01:24:52,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:24:52,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:52,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:52,813 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:24:52,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-16 01:24:52,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:24:52,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:52,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-16 01:24:52,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:53,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:53,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2438 backedges. 870 proven. 1568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:53,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879566710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:53,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:53,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 36 [2023-02-16 01:24:53,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577775282] [2023-02-16 01:24:53,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:53,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-16 01:24:53,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:53,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-16 01:24:53,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=723, Unknown=0, NotChecked=0, Total=1260 [2023-02-16 01:24:53,448 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:53,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:53,723 INFO L93 Difference]: Finished difference Result 200 states and 204 transitions. [2023-02-16 01:24:53,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-16 01:24:53,723 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 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 182 [2023-02-16 01:24:53,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:53,724 INFO L225 Difference]: With dead ends: 200 [2023-02-16 01:24:53,724 INFO L226 Difference]: Without dead ends: 198 [2023-02-16 01:24:53,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 333 SyntacticMatches, 56 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2106 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1657, Invalid=2899, Unknown=0, NotChecked=0, Total=4556 [2023-02-16 01:24:53,725 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 102 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:53,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 287 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:24:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-02-16 01:24:53,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 191. [2023-02-16 01:24:53,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2023-02-16 01:24:53,739 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 182 [2023-02-16 01:24:53,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:53,740 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2023-02-16 01:24:53,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.694444444444445) internal successors, (205), 36 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2023-02-16 01:24:53,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2023-02-16 01:24:53,741 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:53,741 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:53,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:53,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-16 01:24:53,948 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:53,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash 932801667, now seen corresponding path program 35 times [2023-02-16 01:24:53,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:53,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596987320] [2023-02-16 01:24:53,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:53,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:53,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:55,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1713 proven. 957 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:55,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596987320] [2023-02-16 01:24:55,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596987320] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:55,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133724699] [2023-02-16 01:24:55,246 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:24:55,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:55,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:55,247 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:24:55,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-16 01:24:55,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-16 01:24:55,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:55,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-16 01:24:55,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:56,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:56,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:24:57,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 1800 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:57,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133724699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:24:57,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:24:57,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 98 [2023-02-16 01:24:57,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107018524] [2023-02-16 01:24:57,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:24:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-02-16 01:24:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:24:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-02-16 01:24:57,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2180, Invalid=7326, Unknown=0, NotChecked=0, Total=9506 [2023-02-16 01:24:57,238 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:24:58,526 INFO L93 Difference]: Finished difference Result 565 states and 632 transitions. [2023-02-16 01:24:58,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-16 01:24:58,526 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 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 190 [2023-02-16 01:24:58,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:24:58,527 INFO L225 Difference]: With dead ends: 565 [2023-02-16 01:24:58,527 INFO L226 Difference]: Without dead ends: 319 [2023-02-16 01:24:58,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 288 SyntacticMatches, 57 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8365 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6116, Invalid=19006, Unknown=0, NotChecked=0, Total=25122 [2023-02-16 01:24:58,530 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 528 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:24:58,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 902 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:24:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-02-16 01:24:58,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 195. [2023-02-16 01:24:58,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2023-02-16 01:24:58,544 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 190 [2023-02-16 01:24:58,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:24:58,545 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2023-02-16 01:24:58,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.336734693877551) internal successors, (327), 98 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:24:58,545 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2023-02-16 01:24:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-02-16 01:24:58,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:24:58,546 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:24:58,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-16 01:24:58,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-02-16 01:24:58,752 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:24:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:24:58,752 INFO L85 PathProgramCache]: Analyzing trace with hash 12059405, now seen corresponding path program 36 times [2023-02-16 01:24:58,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:24:58,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089706900] [2023-02-16 01:24:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:24:58,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:24:58,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:24:59,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 930 proven. 1862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:59,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:24:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089706900] [2023-02-16 01:24:59,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089706900] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:24:59,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268898947] [2023-02-16 01:24:59,508 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:24:59,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:24:59,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:24:59,509 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:24:59,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-16 01:24:59,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 32 check-sat command(s) [2023-02-16 01:24:59,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:24:59,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 719 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-16 01:24:59,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:24:59,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:24:59,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:00,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2792 backedges. 992 proven. 1800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:00,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268898947] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:00,236 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:00,236 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2023-02-16 01:25:00,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125532781] [2023-02-16 01:25:00,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:00,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-16 01:25:00,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:00,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-16 01:25:00,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=604, Invalid=802, Unknown=0, NotChecked=0, Total=1406 [2023-02-16 01:25:00,238 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:00,528 INFO L93 Difference]: Finished difference Result 212 states and 216 transitions. [2023-02-16 01:25:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-02-16 01:25:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 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 194 [2023-02-16 01:25:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:00,529 INFO L225 Difference]: With dead ends: 212 [2023-02-16 01:25:00,529 INFO L226 Difference]: Without dead ends: 210 [2023-02-16 01:25:00,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 355 SyntacticMatches, 60 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2376 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1862, Invalid=3250, Unknown=0, NotChecked=0, Total=5112 [2023-02-16 01:25:00,533 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 206 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:00,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 299 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:25:00,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-02-16 01:25:00,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2023-02-16 01:25:00,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2023-02-16 01:25:00,553 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 194 [2023-02-16 01:25:00,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:00,553 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2023-02-16 01:25:00,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.7105263157894735) internal successors, (217), 38 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:00,553 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2023-02-16 01:25:00,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2023-02-16 01:25:00,554 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:00,554 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:00,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:00,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-16 01:25:00,759 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:00,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:00,759 INFO L85 PathProgramCache]: Analyzing trace with hash -951388173, now seen corresponding path program 37 times [2023-02-16 01:25:00,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:00,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539917271] [2023-02-16 01:25:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:00,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:02,340 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 1955 proven. 1085 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:02,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:02,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539917271] [2023-02-16 01:25:02,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539917271] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:02,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140979516] [2023-02-16 01:25:02,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:25:02,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:02,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:02,342 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:02,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-16 01:25:02,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:02,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 743 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-16 01:25:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:03,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:25:03,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:05,073 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 2046 proven. 992 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:25:05,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140979516] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:05,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:05,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 101 [2023-02-16 01:25:05,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375105248] [2023-02-16 01:25:05,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:05,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-16 01:25:05,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:05,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-16 01:25:05,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2281, Invalid=7819, Unknown=0, NotChecked=0, Total=10100 [2023-02-16 01:25:05,075 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:05,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:05,770 INFO L93 Difference]: Finished difference Result 466 states and 534 transitions. [2023-02-16 01:25:05,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-02-16 01:25:05,770 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 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 202 [2023-02-16 01:25:05,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:05,771 INFO L225 Difference]: With dead ends: 466 [2023-02-16 01:25:05,771 INFO L226 Difference]: Without dead ends: 333 [2023-02-16 01:25:05,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 308 SyntacticMatches, 62 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6567 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4395, Invalid=13161, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 01:25:05,773 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 436 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:05,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [436 Valid, 720 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:25:05,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-02-16 01:25:05,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 205. [2023-02-16 01:25:05,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:05,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2023-02-16 01:25:05,808 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 202 [2023-02-16 01:25:05,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:05,809 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2023-02-16 01:25:05,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.3465346534653464) internal successors, (338), 101 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:05,809 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2023-02-16 01:25:05,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2023-02-16 01:25:05,810 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:05,810 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:05,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-02-16 01:25:06,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-16 01:25:06,013 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:06,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:06,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1744337320, now seen corresponding path program 38 times [2023-02-16 01:25:06,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:06,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76842985] [2023-02-16 01:25:06,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:06,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:06,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:07,446 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 1955 proven. 1149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:07,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76842985] [2023-02-16 01:25:07,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76842985] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:07,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428385785] [2023-02-16 01:25:07,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:25:07,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:07,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:07,449 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:07,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-16 01:25:07,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:25:07,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:07,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-16 01:25:07,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:08,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:08,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:09,736 INFO L134 CoverageAnalysis]: Checked inductivity of 3104 backedges. 2048 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:09,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428385785] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:09,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:09,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 103 [2023-02-16 01:25:09,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030909119] [2023-02-16 01:25:09,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:09,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-02-16 01:25:09,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:09,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-02-16 01:25:09,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2383, Invalid=8123, Unknown=0, NotChecked=0, Total=10506 [2023-02-16 01:25:09,740 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:10,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:10,485 INFO L93 Difference]: Finished difference Result 474 states and 544 transitions. [2023-02-16 01:25:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-02-16 01:25:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 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 204 [2023-02-16 01:25:10,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:10,487 INFO L225 Difference]: With dead ends: 474 [2023-02-16 01:25:10,487 INFO L226 Difference]: Without dead ends: 339 [2023-02-16 01:25:10,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 309 SyntacticMatches, 64 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6840 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4629, Invalid=13731, Unknown=0, NotChecked=0, Total=18360 [2023-02-16 01:25:10,489 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 616 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:10,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 699 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:25:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2023-02-16 01:25:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 207. [2023-02-16 01:25:10,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:10,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2023-02-16 01:25:10,506 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 204 [2023-02-16 01:25:10,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:10,506 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2023-02-16 01:25:10,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 3.3009708737864076) internal successors, (340), 103 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:10,506 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2023-02-16 01:25:10,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2023-02-16 01:25:10,507 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:10,507 INFO L195 NwaCegarLoop]: trace histogram [34, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:10,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:10,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2023-02-16 01:25:10,713 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:10,713 INFO L85 PathProgramCache]: Analyzing trace with hash 735711101, now seen corresponding path program 39 times [2023-02-16 01:25:10,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:10,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101710288] [2023-02-16 01:25:10,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:10,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:10,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1056 proven. 2114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:11,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:11,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101710288] [2023-02-16 01:25:11,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101710288] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:11,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993914563] [2023-02-16 01:25:11,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:25:11,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:11,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:11,629 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:11,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-16 01:25:11,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2023-02-16 01:25:11,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:11,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 72 conjunts are in the unsatisfiable core [2023-02-16 01:25:11,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:11,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:12,403 INFO L134 CoverageAnalysis]: Checked inductivity of 3170 backedges. 1122 proven. 2048 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:12,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993914563] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:12,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:12,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 40 [2023-02-16 01:25:12,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323917954] [2023-02-16 01:25:12,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:12,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-16 01:25:12,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:12,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-16 01:25:12,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=885, Unknown=0, NotChecked=0, Total=1560 [2023-02-16 01:25:12,406 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:12,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:12,730 INFO L93 Difference]: Finished difference Result 224 states and 228 transitions. [2023-02-16 01:25:12,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-02-16 01:25:12,730 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 206 [2023-02-16 01:25:12,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:12,731 INFO L225 Difference]: With dead ends: 224 [2023-02-16 01:25:12,731 INFO L226 Difference]: Without dead ends: 222 [2023-02-16 01:25:12,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 377 SyntacticMatches, 64 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2662 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2079, Invalid=3621, Unknown=0, NotChecked=0, Total=5700 [2023-02-16 01:25:12,732 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 116 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:12,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 311 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:25:12,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2023-02-16 01:25:12,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2023-02-16 01:25:12,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:12,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2023-02-16 01:25:12,755 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 206 [2023-02-16 01:25:12,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:12,756 INFO L495 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2023-02-16 01:25:12,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.725) internal successors, (229), 40 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:12,756 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2023-02-16 01:25:12,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2023-02-16 01:25:12,757 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:12,757 INFO L195 NwaCegarLoop]: trace histogram [35, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:12,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-02-16 01:25:12,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-16 01:25:12,963 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:12,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:12,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1013869469, now seen corresponding path program 40 times [2023-02-16 01:25:12,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:12,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046175899] [2023-02-16 01:25:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:12,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:13,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:14,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2213 proven. 1221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046175899] [2023-02-16 01:25:14,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046175899] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601121408] [2023-02-16 01:25:14,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:25:14,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:14,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:14,648 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:14,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-16 01:25:14,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:25:14,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:14,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-16 01:25:14,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:16,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 2312 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:17,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601121408] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:17,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:17,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 110 [2023-02-16 01:25:17,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98472423] [2023-02-16 01:25:17,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:17,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2023-02-16 01:25:17,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:17,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2023-02-16 01:25:17,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2740, Invalid=9250, Unknown=0, NotChecked=0, Total=11990 [2023-02-16 01:25:17,872 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:19,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:19,436 INFO L93 Difference]: Finished difference Result 637 states and 712 transitions. [2023-02-16 01:25:19,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-16 01:25:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 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 214 [2023-02-16 01:25:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:19,438 INFO L225 Difference]: With dead ends: 637 [2023-02-16 01:25:19,438 INFO L226 Difference]: Without dead ends: 359 [2023-02-16 01:25:19,440 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 324 SyntacticMatches, 65 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10639 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=7744, Invalid=24118, Unknown=0, NotChecked=0, Total=31862 [2023-02-16 01:25:19,441 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 597 mSDsluCounter, 1082 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1155 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:19,441 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1155 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:25:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-02-16 01:25:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 219. [2023-02-16 01:25:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.018348623853211) internal successors, (222), 218 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2023-02-16 01:25:19,459 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 214 [2023-02-16 01:25:19,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:19,459 INFO L495 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2023-02-16 01:25:19,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.3363636363636364) internal successors, (367), 110 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:19,459 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2023-02-16 01:25:19,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-02-16 01:25:19,460 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:19,460 INFO L195 NwaCegarLoop]: trace histogram [36, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:19,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:19,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-02-16 01:25:19,666 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:19,666 INFO L85 PathProgramCache]: Analyzing trace with hash 567782637, now seen corresponding path program 41 times [2023-02-16 01:25:19,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:19,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870194849] [2023-02-16 01:25:19,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:19,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:20,853 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1190 proven. 2382 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:20,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870194849] [2023-02-16 01:25:20,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870194849] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:20,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906760940] [2023-02-16 01:25:20,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:25:20,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:20,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:20,855 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:20,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-16 01:25:21,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2023-02-16 01:25:21,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:21,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 76 conjunts are in the unsatisfiable core [2023-02-16 01:25:21,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:21,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:21,785 INFO L134 CoverageAnalysis]: Checked inductivity of 3572 backedges. 1260 proven. 2312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:21,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906760940] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:21,786 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:21,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 42 [2023-02-16 01:25:21,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899754602] [2023-02-16 01:25:21,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:21,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-02-16 01:25:21,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:21,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-02-16 01:25:21,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=750, Invalid=972, Unknown=0, NotChecked=0, Total=1722 [2023-02-16 01:25:21,787 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:22,169 INFO L93 Difference]: Finished difference Result 236 states and 240 transitions. [2023-02-16 01:25:22,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-16 01:25:22,169 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 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 218 [2023-02-16 01:25:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:22,170 INFO L225 Difference]: With dead ends: 236 [2023-02-16 01:25:22,170 INFO L226 Difference]: Without dead ends: 234 [2023-02-16 01:25:22,171 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 399 SyntacticMatches, 68 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2964 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2308, Invalid=4012, Unknown=0, NotChecked=0, Total=6320 [2023-02-16 01:25:22,172 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 122 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:22,172 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 359 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:25:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2023-02-16 01:25:22,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2023-02-16 01:25:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0176991150442478) internal successors, (230), 226 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:22,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2023-02-16 01:25:22,190 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 218 [2023-02-16 01:25:22,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:22,190 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2023-02-16 01:25:22,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.738095238095238) internal successors, (241), 42 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:22,191 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2023-02-16 01:25:22,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2023-02-16 01:25:22,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:22,192 INFO L195 NwaCegarLoop]: trace histogram [37, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:22,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:22,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:22,397 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:22,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1116914131, now seen corresponding path program 42 times [2023-02-16 01:25:22,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:22,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197628605] [2023-02-16 01:25:22,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:22,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:23,944 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2487 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:23,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:23,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197628605] [2023-02-16 01:25:23,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197628605] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:23,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764610720] [2023-02-16 01:25:23,945 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:25:23,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:23,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:23,946 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:23,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-16 01:25:24,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2023-02-16 01:25:24,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:24,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-16 01:25:24,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:25,307 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:25,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3852 backedges. 2592 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:26,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764610720] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:26,271 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:26,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 116 [2023-02-16 01:25:26,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14850812] [2023-02-16 01:25:26,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:26,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2023-02-16 01:25:26,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:26,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2023-02-16 01:25:26,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3044, Invalid=10296, Unknown=0, NotChecked=0, Total=13340 [2023-02-16 01:25:26,274 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:27,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:27,885 INFO L93 Difference]: Finished difference Result 673 states and 752 transitions. [2023-02-16 01:25:27,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-02-16 01:25:27,886 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 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 226 [2023-02-16 01:25:27,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:27,887 INFO L225 Difference]: With dead ends: 673 [2023-02-16 01:25:27,887 INFO L226 Difference]: Without dead ends: 379 [2023-02-16 01:25:27,889 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 342 SyntacticMatches, 69 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11878 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8630, Invalid=26902, Unknown=0, NotChecked=0, Total=35532 [2023-02-16 01:25:27,890 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 781 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 1431 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 1310 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:27,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 1310 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:25:27,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2023-02-16 01:25:27,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 231. [2023-02-16 01:25:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 234 transitions. [2023-02-16 01:25:27,909 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 234 transitions. Word has length 226 [2023-02-16 01:25:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:27,909 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 234 transitions. [2023-02-16 01:25:27,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.336206896551724) internal successors, (387), 116 states have internal predecessors, (387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 234 transitions. [2023-02-16 01:25:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2023-02-16 01:25:27,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:27,910 INFO L195 NwaCegarLoop]: trace histogram [38, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:27,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:28,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:28,116 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:28,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1125538653, now seen corresponding path program 43 times [2023-02-16 01:25:28,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:28,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318103128] [2023-02-16 01:25:28,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:28,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:29,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1332 proven. 2666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:29,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318103128] [2023-02-16 01:25:29,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318103128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:29,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182122726] [2023-02-16 01:25:29,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:25:29,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:29,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:29,415 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:29,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-16 01:25:29,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:29,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 851 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-16 01:25:29,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:29,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:30,348 INFO L134 CoverageAnalysis]: Checked inductivity of 3998 backedges. 1406 proven. 2592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:30,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182122726] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:30,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:30,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2023-02-16 01:25:30,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099695441] [2023-02-16 01:25:30,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:30,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-16 01:25:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:30,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-16 01:25:30,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=829, Invalid=1063, Unknown=0, NotChecked=0, Total=1892 [2023-02-16 01:25:30,350 INFO L87 Difference]: Start difference. First operand 231 states and 234 transitions. Second operand has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:30,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:30,733 INFO L93 Difference]: Finished difference Result 248 states and 252 transitions. [2023-02-16 01:25:30,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-02-16 01:25:30,733 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 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 230 [2023-02-16 01:25:30,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:30,734 INFO L225 Difference]: With dead ends: 248 [2023-02-16 01:25:30,734 INFO L226 Difference]: Without dead ends: 246 [2023-02-16 01:25:30,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 421 SyntacticMatches, 72 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3282 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2549, Invalid=4423, Unknown=0, NotChecked=0, Total=6972 [2023-02-16 01:25:30,736 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 244 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:30,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 339 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:25:30,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-02-16 01:25:30,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 239. [2023-02-16 01:25:30,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0168067226890756) internal successors, (242), 238 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 242 transitions. [2023-02-16 01:25:30,763 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 242 transitions. Word has length 230 [2023-02-16 01:25:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:30,763 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 242 transitions. [2023-02-16 01:25:30,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.75) internal successors, (253), 44 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:30,764 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 242 transitions. [2023-02-16 01:25:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-02-16 01:25:30,764 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:30,765 INFO L195 NwaCegarLoop]: trace histogram [39, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:30,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:30,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-16 01:25:30,970 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:30,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:30,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1489764285, now seen corresponding path program 44 times [2023-02-16 01:25:30,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:30,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281969460] [2023-02-16 01:25:30,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:30,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:32,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2777 proven. 1517 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:32,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:32,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281969460] [2023-02-16 01:25:32,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281969460] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:32,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419853012] [2023-02-16 01:25:32,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:25:32,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:32,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:32,668 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:32,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-16 01:25:32,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:25:32,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:32,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 875 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-16 01:25:32,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:25:34,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4294 backedges. 2886 proven. 1406 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:25:35,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419853012] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:35,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:35,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 78] total 119 [2023-02-16 01:25:35,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231109293] [2023-02-16 01:25:35,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:35,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-02-16 01:25:35,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:35,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-02-16 01:25:35,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3163, Invalid=10879, Unknown=0, NotChecked=0, Total=14042 [2023-02-16 01:25:35,113 INFO L87 Difference]: Start difference. First operand 239 states and 242 transitions. Second operand has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:36,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:36,071 INFO L93 Difference]: Finished difference Result 550 states and 630 transitions. [2023-02-16 01:25:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-02-16 01:25:36,072 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 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 238 [2023-02-16 01:25:36,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:36,073 INFO L225 Difference]: With dead ends: 550 [2023-02-16 01:25:36,073 INFO L226 Difference]: Without dead ends: 393 [2023-02-16 01:25:36,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 362 SyntacticMatches, 74 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9171 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=6129, Invalid=18363, Unknown=0, NotChecked=0, Total=24492 [2023-02-16 01:25:36,077 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 598 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 598 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:36,077 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [598 Valid, 914 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:25:36,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-02-16 01:25:36,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 241. [2023-02-16 01:25:36,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:36,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 244 transitions. [2023-02-16 01:25:36,098 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 244 transitions. Word has length 238 [2023-02-16 01:25:36,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:36,098 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 244 transitions. [2023-02-16 01:25:36,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 3.3445378151260505) internal successors, (398), 119 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:36,098 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 244 transitions. [2023-02-16 01:25:36,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2023-02-16 01:25:36,099 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:36,099 INFO L195 NwaCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:36,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:36,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-16 01:25:36,305 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:36,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:36,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1569193944, now seen corresponding path program 45 times [2023-02-16 01:25:36,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:36,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252120977] [2023-02-16 01:25:36,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:36,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:38,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2777 proven. 1593 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:38,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252120977] [2023-02-16 01:25:38,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252120977] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:38,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810759486] [2023-02-16 01:25:38,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:25:38,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:38,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:38,364 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:38,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-16 01:25:38,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2023-02-16 01:25:38,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:38,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 885 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-16 01:25:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:40,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:41,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4370 backedges. 2888 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:41,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810759486] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:41,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:41,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 80] total 121 [2023-02-16 01:25:41,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95007587] [2023-02-16 01:25:41,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:41,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2023-02-16 01:25:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2023-02-16 01:25:41,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3283, Invalid=11237, Unknown=0, NotChecked=0, Total=14520 [2023-02-16 01:25:41,251 INFO L87 Difference]: Start difference. First operand 241 states and 244 transitions. Second operand has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:42,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:42,257 INFO L93 Difference]: Finished difference Result 558 states and 640 transitions. [2023-02-16 01:25:42,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-16 01:25:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 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 240 [2023-02-16 01:25:42,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:42,259 INFO L225 Difference]: With dead ends: 558 [2023-02-16 01:25:42,259 INFO L226 Difference]: Without dead ends: 399 [2023-02-16 01:25:42,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 363 SyntacticMatches, 76 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9492 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6405, Invalid=19035, Unknown=0, NotChecked=0, Total=25440 [2023-02-16 01:25:42,289 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 513 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 1115 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:42,289 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1015 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1115 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:25:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2023-02-16 01:25:42,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 243. [2023-02-16 01:25:42,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0165289256198347) internal successors, (246), 242 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 246 transitions. [2023-02-16 01:25:42,312 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 246 transitions. Word has length 240 [2023-02-16 01:25:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:42,313 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 246 transitions. [2023-02-16 01:25:42,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.3057851239669422) internal successors, (400), 121 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:42,313 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 246 transitions. [2023-02-16 01:25:42,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2023-02-16 01:25:42,314 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:42,314 INFO L195 NwaCegarLoop]: trace histogram [40, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:42,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:42,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-02-16 01:25:42,520 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash -591684915, now seen corresponding path program 46 times [2023-02-16 01:25:42,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:42,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376559036] [2023-02-16 01:25:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:42,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:42,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1482 proven. 2966 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:43,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:43,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376559036] [2023-02-16 01:25:43,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376559036] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:43,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14559853] [2023-02-16 01:25:43,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:25:43,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:43,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:43,965 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:43,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-16 01:25:44,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:25:44,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:44,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 84 conjunts are in the unsatisfiable core [2023-02-16 01:25:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:44,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:44,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:45,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4448 backedges. 1560 proven. 2888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:45,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14559853] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:45,056 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:45,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 46 [2023-02-16 01:25:45,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908190891] [2023-02-16 01:25:45,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:45,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-02-16 01:25:45,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:45,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-02-16 01:25:45,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1158, Unknown=0, NotChecked=0, Total=2070 [2023-02-16 01:25:45,058 INFO L87 Difference]: Start difference. First operand 243 states and 246 transitions. Second operand has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:45,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:45,521 INFO L93 Difference]: Finished difference Result 260 states and 264 transitions. [2023-02-16 01:25:45,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-16 01:25:45,521 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 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 242 [2023-02-16 01:25:45,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:45,522 INFO L225 Difference]: With dead ends: 260 [2023-02-16 01:25:45,522 INFO L226 Difference]: Without dead ends: 258 [2023-02-16 01:25:45,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 443 SyntacticMatches, 76 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3616 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2802, Invalid=4854, Unknown=0, NotChecked=0, Total=7656 [2023-02-16 01:25:45,523 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 134 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:45,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 448 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:25:45,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-16 01:25:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2023-02-16 01:25:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2023-02-16 01:25:45,546 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 242 [2023-02-16 01:25:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:45,546 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2023-02-16 01:25:45,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.760869565217392) internal successors, (265), 46 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2023-02-16 01:25:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-02-16 01:25:45,547 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:45,547 INFO L195 NwaCegarLoop]: trace histogram [41, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:45,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-16 01:25:45,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:45,753 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:45,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2128949325, now seen corresponding path program 47 times [2023-02-16 01:25:45,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:45,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867099318] [2023-02-16 01:25:45,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:45,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:48,241 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3083 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:48,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:48,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867099318] [2023-02-16 01:25:48,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867099318] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:48,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369977155] [2023-02-16 01:25:48,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:25:48,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:48,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:48,242 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:48,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-16 01:25:48,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2023-02-16 01:25:48,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:48,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-16 01:25:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:50,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 4760 backedges. 3200 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:51,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369977155] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:51,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:51,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 128 [2023-02-16 01:25:51,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215382329] [2023-02-16 01:25:51,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:51,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-02-16 01:25:51,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-02-16 01:25:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3700, Invalid=12556, Unknown=0, NotChecked=0, Total=16256 [2023-02-16 01:25:51,616 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:53,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:53,529 INFO L93 Difference]: Finished difference Result 745 states and 832 transitions. [2023-02-16 01:25:53,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2023-02-16 01:25:53,529 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 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 250 [2023-02-16 01:25:53,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:53,530 INFO L225 Difference]: With dead ends: 745 [2023-02-16 01:25:53,530 INFO L226 Difference]: Without dead ends: 419 [2023-02-16 01:25:53,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 378 SyntacticMatches, 77 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14560 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10546, Invalid=32926, Unknown=0, NotChecked=0, Total=43472 [2023-02-16 01:25:53,533 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 989 mSDsluCounter, 1050 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 989 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:53,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [989 Valid, 1135 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:25:53,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-02-16 01:25:53,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 255. [2023-02-16 01:25:53,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.015748031496063) internal successors, (258), 254 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:53,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2023-02-16 01:25:53,556 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 250 [2023-02-16 01:25:53,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:53,556 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2023-02-16 01:25:53,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.3359375) internal successors, (427), 128 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:53,557 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2023-02-16 01:25:53,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2023-02-16 01:25:53,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:53,558 INFO L195 NwaCegarLoop]: trace histogram [42, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:53,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-02-16 01:25:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-16 01:25:53,761 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:53,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash 145550141, now seen corresponding path program 48 times [2023-02-16 01:25:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:53,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489121831] [2023-02-16 01:25:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:53,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1640 proven. 3282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:55,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:55,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489121831] [2023-02-16 01:25:55,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489121831] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:55,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963959130] [2023-02-16 01:25:55,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:25:55,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:55,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:55,306 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:55,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-16 01:25:55,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 42 check-sat command(s) [2023-02-16 01:25:55,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:25:55,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 939 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-16 01:25:55,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:25:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:55,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:25:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4922 backedges. 1722 proven. 3200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:56,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963959130] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:25:56,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:25:56,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2023-02-16 01:25:56,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187302647] [2023-02-16 01:25:56,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:25:56,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-16 01:25:56,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:25:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-16 01:25:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=999, Invalid=1257, Unknown=0, NotChecked=0, Total=2256 [2023-02-16 01:25:56,657 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:57,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:25:57,089 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2023-02-16 01:25:57,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2023-02-16 01:25:57,089 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2023-02-16 01:25:57,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:25:57,090 INFO L225 Difference]: With dead ends: 272 [2023-02-16 01:25:57,090 INFO L226 Difference]: Without dead ends: 270 [2023-02-16 01:25:57,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 465 SyntacticMatches, 80 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3966 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3067, Invalid=5305, Unknown=0, NotChecked=0, Total=8372 [2023-02-16 01:25:57,092 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 266 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:25:57,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [266 Valid, 350 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:25:57,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2023-02-16 01:25:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 263. [2023-02-16 01:25:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.015267175572519) internal successors, (266), 262 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 266 transitions. [2023-02-16 01:25:57,115 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 266 transitions. Word has length 254 [2023-02-16 01:25:57,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:25:57,115 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 266 transitions. [2023-02-16 01:25:57,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.770833333333333) internal successors, (277), 48 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:25:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 266 transitions. [2023-02-16 01:25:57,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2023-02-16 01:25:57,116 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:25:57,116 INFO L195 NwaCegarLoop]: trace histogram [43, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:25:57,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-16 01:25:57,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:57,322 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:25:57,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:25:57,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1823256611, now seen corresponding path program 49 times [2023-02-16 01:25:57,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:25:57,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576313094] [2023-02-16 01:25:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:25:57,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:25:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3405 proven. 1845 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:25:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:25:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576313094] [2023-02-16 01:25:59,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576313094] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:25:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124072370] [2023-02-16 01:25:59,386 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:25:59,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:25:59,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:25:59,387 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:25:59,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-16 01:25:59,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:25:59,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 86 conjunts are in the unsatisfiable core [2023-02-16 01:25:59,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:26:02,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:03,999 INFO L134 CoverageAnalysis]: Checked inductivity of 5250 backedges. 3526 proven. 1722 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:26:04,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124072370] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:04,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:04,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 86, 86] total 131 [2023-02-16 01:26:04,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436578034] [2023-02-16 01:26:04,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:04,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-02-16 01:26:04,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:04,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-02-16 01:26:04,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3831, Invalid=13199, Unknown=0, NotChecked=0, Total=17030 [2023-02-16 01:26:04,002 INFO L87 Difference]: Start difference. First operand 263 states and 266 transitions. Second operand has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:05,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:05,446 INFO L93 Difference]: Finished difference Result 606 states and 694 transitions. [2023-02-16 01:26:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-02-16 01:26:05,446 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 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 262 [2023-02-16 01:26:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:05,447 INFO L225 Difference]: With dead ends: 606 [2023-02-16 01:26:05,447 INFO L226 Difference]: Without dead ends: 433 [2023-02-16 01:26:05,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 398 SyntacticMatches, 82 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11147 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7445, Invalid=22311, Unknown=0, NotChecked=0, Total=29756 [2023-02-16 01:26:05,449 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 663 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 1123 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:05,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 1004 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1123 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:26:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-02-16 01:26:05,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 265. [2023-02-16 01:26:05,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 1.0151515151515151) internal successors, (268), 264 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:05,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2023-02-16 01:26:05,473 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 262 [2023-02-16 01:26:05,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:05,473 INFO L495 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2023-02-16 01:26:05,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 3.3435114503816794) internal successors, (438), 131 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:05,474 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2023-02-16 01:26:05,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-02-16 01:26:05,475 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:05,475 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:05,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-16 01:26:05,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-16 01:26:05,680 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:05,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:05,681 INFO L85 PathProgramCache]: Analyzing trace with hash -354905848, now seen corresponding path program 50 times [2023-02-16 01:26:05,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:05,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356575867] [2023-02-16 01:26:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:05,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:08,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3405 proven. 1929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:08,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356575867] [2023-02-16 01:26:08,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356575867] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:08,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982679795] [2023-02-16 01:26:08,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:26:08,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:08,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:08,515 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:08,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-16 01:26:08,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:26:08,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:26:08,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 88 conjunts are in the unsatisfiable core [2023-02-16 01:26:08,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:11,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3528 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:11,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 5334 backedges. 3528 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:12,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982679795] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:12,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:12,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88, 88] total 133 [2023-02-16 01:26:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865386412] [2023-02-16 01:26:12,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:12,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-16 01:26:12,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:12,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-16 01:26:12,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3963, Invalid=13593, Unknown=0, NotChecked=0, Total=17556 [2023-02-16 01:26:12,586 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 133 states, 133 states have (on average 3.308270676691729) internal successors, (440), 133 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:14,018 INFO L93 Difference]: Finished difference Result 614 states and 704 transitions. [2023-02-16 01:26:14,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-02-16 01:26:14,019 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 3.308270676691729) internal successors, (440), 133 states have internal predecessors, (440), 0 states have call successors, (0), 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 264 [2023-02-16 01:26:14,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:14,020 INFO L225 Difference]: With dead ends: 614 [2023-02-16 01:26:14,020 INFO L226 Difference]: Without dead ends: 439 [2023-02-16 01:26:14,022 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 657 GetRequests, 399 SyntacticMatches, 84 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11500 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7749, Invalid=23051, Unknown=0, NotChecked=0, Total=30800 [2023-02-16 01:26:14,022 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 650 mSDsluCounter, 914 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 650 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:14,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [650 Valid, 1005 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-16 01:26:14,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2023-02-16 01:26:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 267. [2023-02-16 01:26:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0150375939849625) internal successors, (270), 266 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 270 transitions. [2023-02-16 01:26:14,047 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 270 transitions. Word has length 264 [2023-02-16 01:26:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:14,048 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 270 transitions. [2023-02-16 01:26:14,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 3.308270676691729) internal successors, (440), 133 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 270 transitions. [2023-02-16 01:26:14,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-02-16 01:26:14,049 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:14,049 INFO L195 NwaCegarLoop]: trace histogram [44, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:14,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-16 01:26:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-02-16 01:26:14,255 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:14,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:14,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1919955795, now seen corresponding path program 51 times [2023-02-16 01:26:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:14,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483447109] [2023-02-16 01:26:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:14,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 1806 proven. 3614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:15,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:15,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483447109] [2023-02-16 01:26:15,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483447109] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:15,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164980917] [2023-02-16 01:26:15,948 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:26:15,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:15,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:15,949 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:15,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-16 01:26:16,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2023-02-16 01:26:16,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:26:16,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-16 01:26:16,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:16,411 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 1892 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:16,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5420 backedges. 1892 proven. 3528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:17,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164980917] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:17,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:17,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 50 [2023-02-16 01:26:17,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844186986] [2023-02-16 01:26:17,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:17,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-16 01:26:17,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:17,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-16 01:26:17,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1090, Invalid=1360, Unknown=0, NotChecked=0, Total=2450 [2023-02-16 01:26:17,563 INFO L87 Difference]: Start difference. First operand 267 states and 270 transitions. Second operand has 50 states, 50 states have (on average 5.78) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:18,307 INFO L93 Difference]: Finished difference Result 284 states and 288 transitions. [2023-02-16 01:26:18,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2023-02-16 01:26:18,308 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.78) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2023-02-16 01:26:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:18,309 INFO L225 Difference]: With dead ends: 284 [2023-02-16 01:26:18,309 INFO L226 Difference]: Without dead ends: 282 [2023-02-16 01:26:18,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 487 SyntacticMatches, 84 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4332 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3344, Invalid=5776, Unknown=0, NotChecked=0, Total=9120 [2023-02-16 01:26:18,310 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 144 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:18,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 465 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:26:18,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2023-02-16 01:26:18,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2023-02-16 01:26:18,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0145985401459854) internal successors, (278), 274 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:18,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2023-02-16 01:26:18,335 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 266 [2023-02-16 01:26:18,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:18,335 INFO L495 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2023-02-16 01:26:18,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.78) internal successors, (289), 50 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:18,336 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2023-02-16 01:26:18,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-02-16 01:26:18,337 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:18,337 INFO L195 NwaCegarLoop]: trace histogram [45, 44, 44, 44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:18,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-02-16 01:26:18,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:18,542 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:18,543 INFO L85 PathProgramCache]: Analyzing trace with hash -217112173, now seen corresponding path program 52 times [2023-02-16 01:26:18,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:18,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516657121] [2023-02-16 01:26:18,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:18,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:21,115 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 3743 proven. 2021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:21,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516657121] [2023-02-16 01:26:21,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516657121] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:21,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527244115] [2023-02-16 01:26:21,115 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:26:21,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:21,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:21,117 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:21,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-16 01:26:21,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:26:21,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:26:21,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-16 01:26:21,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 3872 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:23,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:24,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5764 backedges. 3872 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:24,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527244115] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:24,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:24,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91, 91] total 140 [2023-02-16 01:26:24,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259576818] [2023-02-16 01:26:24,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:24,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2023-02-16 01:26:24,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:24,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2023-02-16 01:26:24,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4420, Invalid=15040, Unknown=0, NotChecked=0, Total=19460 [2023-02-16 01:26:24,640 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 140 states, 140 states have (on average 3.335714285714286) internal successors, (467), 140 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:27,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:27,497 INFO L93 Difference]: Finished difference Result 817 states and 912 transitions. [2023-02-16 01:26:27,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2023-02-16 01:26:27,497 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.335714285714286) internal successors, (467), 140 states have internal predecessors, (467), 0 states have call successors, (0), 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 274 [2023-02-16 01:26:27,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:27,498 INFO L225 Difference]: With dead ends: 817 [2023-02-16 01:26:27,498 INFO L226 Difference]: Without dead ends: 459 [2023-02-16 01:26:27,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 414 SyntacticMatches, 85 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17514 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=12654, Invalid=39558, Unknown=0, NotChecked=0, Total=52212 [2023-02-16 01:26:27,500 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 820 mSDsluCounter, 1235 mSDsCounter, 0 mSdLazyCounter, 1468 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:27,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 1328 Invalid, 1695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1468 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:26:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2023-02-16 01:26:27,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 279. [2023-02-16 01:26:27,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.014388489208633) internal successors, (282), 278 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:27,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 282 transitions. [2023-02-16 01:26:27,527 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 282 transitions. Word has length 274 [2023-02-16 01:26:27,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:27,527 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 282 transitions. [2023-02-16 01:26:27,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.335714285714286) internal successors, (467), 140 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:27,528 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 282 transitions. [2023-02-16 01:26:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2023-02-16 01:26:27,529 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:27,529 INFO L195 NwaCegarLoop]: trace histogram [46, 45, 45, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:27,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-16 01:26:27,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-16 01:26:27,734 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:27,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1094074595, now seen corresponding path program 53 times [2023-02-16 01:26:27,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:27,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190969327] [2023-02-16 01:26:27,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:27,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:29,621 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 1980 proven. 3962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:29,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190969327] [2023-02-16 01:26:29,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190969327] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:29,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709102890] [2023-02-16 01:26:29,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:26:29,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:29,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:29,624 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:29,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-16 01:26:29,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2023-02-16 01:26:29,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:26:29,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 96 conjunts are in the unsatisfiable core [2023-02-16 01:26:29,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 2070 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:29,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:31,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5942 backedges. 2070 proven. 3872 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:31,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709102890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:31,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:31,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 52 [2023-02-16 01:26:31,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43642290] [2023-02-16 01:26:31,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:31,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-16 01:26:31,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:31,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-16 01:26:31,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1185, Invalid=1467, Unknown=0, NotChecked=0, Total=2652 [2023-02-16 01:26:31,019 INFO L87 Difference]: Start difference. First operand 279 states and 282 transitions. Second operand has 52 states, 52 states have (on average 5.788461538461538) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:31,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:31,804 INFO L93 Difference]: Finished difference Result 296 states and 300 transitions. [2023-02-16 01:26:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-16 01:26:31,804 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 5.788461538461538) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 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 278 [2023-02-16 01:26:31,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:31,805 INFO L225 Difference]: With dead ends: 296 [2023-02-16 01:26:31,805 INFO L226 Difference]: Without dead ends: 294 [2023-02-16 01:26:31,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 509 SyntacticMatches, 88 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4714 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3633, Invalid=6267, Unknown=0, NotChecked=0, Total=9900 [2023-02-16 01:26:31,806 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 290 mSDsluCounter, 375 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:31,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 434 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:26:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2023-02-16 01:26:31,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 287. [2023-02-16 01:26:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.013986013986014) internal successors, (290), 286 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:31,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 290 transitions. [2023-02-16 01:26:31,834 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 290 transitions. Word has length 278 [2023-02-16 01:26:31,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:31,834 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 290 transitions. [2023-02-16 01:26:31,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 5.788461538461538) internal successors, (301), 52 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:31,834 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 290 transitions. [2023-02-16 01:26:31,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-16 01:26:31,835 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:31,835 INFO L195 NwaCegarLoop]: trace histogram [47, 46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:31,841 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-02-16 01:26:32,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-02-16 01:26:32,041 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:32,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:32,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1780982787, now seen corresponding path program 54 times [2023-02-16 01:26:32,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:32,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157517730] [2023-02-16 01:26:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:32,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 4097 proven. 2205 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:35,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:35,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157517730] [2023-02-16 01:26:35,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157517730] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:35,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494455233] [2023-02-16 01:26:35,169 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:26:35,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:35,170 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:35,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-16 01:26:35,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2023-02-16 01:26:35,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:26:35,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 1051 conjuncts, 95 conjunts are in the unsatisfiable core [2023-02-16 01:26:35,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:38,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 4232 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:38,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 4232 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:40,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494455233] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:40,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:40,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 146 [2023-02-16 01:26:40,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018178308] [2023-02-16 01:26:40,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:40,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2023-02-16 01:26:40,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2023-02-16 01:26:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4804, Invalid=16366, Unknown=0, NotChecked=0, Total=21170 [2023-02-16 01:26:40,341 INFO L87 Difference]: Start difference. First operand 287 states and 290 transitions. Second operand has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:42,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:42,695 INFO L93 Difference]: Finished difference Result 853 states and 952 transitions. [2023-02-16 01:26:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2023-02-16 01:26:42,695 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 0 states have call successors, (0), 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 286 [2023-02-16 01:26:42,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:42,697 INFO L225 Difference]: With dead ends: 853 [2023-02-16 01:26:42,697 INFO L226 Difference]: Without dead ends: 479 [2023-02-16 01:26:42,700 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 432 SyntacticMatches, 89 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19093 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=13780, Invalid=43102, Unknown=0, NotChecked=0, Total=56882 [2023-02-16 01:26:42,701 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 993 mSDsluCounter, 1336 mSDsCounter, 0 mSdLazyCounter, 1579 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 1851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:42,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [993 Valid, 1433 Invalid, 1851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1579 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:26:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2023-02-16 01:26:42,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 291. [2023-02-16 01:26:42,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.013793103448276) internal successors, (294), 290 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:42,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 294 transitions. [2023-02-16 01:26:42,729 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 294 transitions. Word has length 286 [2023-02-16 01:26:42,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:42,729 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 294 transitions. [2023-02-16 01:26:42,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.335616438356164) internal successors, (487), 146 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:42,730 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 294 transitions. [2023-02-16 01:26:42,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2023-02-16 01:26:42,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:42,731 INFO L195 NwaCegarLoop]: trace histogram [48, 47, 47, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:42,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-16 01:26:42,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:42,937 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:42,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1551909517, now seen corresponding path program 55 times [2023-02-16 01:26:42,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:42,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105887429] [2023-02-16 01:26:42,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:42,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 2162 proven. 4326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:45,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:45,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105887429] [2023-02-16 01:26:45,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105887429] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:45,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048475222] [2023-02-16 01:26:45,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:26:45,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:45,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:45,073 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:45,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-16 01:26:45,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:45,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-16 01:26:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:45,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 2256 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:45,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:46,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6488 backedges. 2256 proven. 4232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:46,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048475222] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:46,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:46,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 54 [2023-02-16 01:26:46,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977143771] [2023-02-16 01:26:46,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:46,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-02-16 01:26:46,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:46,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-02-16 01:26:46,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1284, Invalid=1578, Unknown=0, NotChecked=0, Total=2862 [2023-02-16 01:26:46,978 INFO L87 Difference]: Start difference. First operand 291 states and 294 transitions. Second operand has 54 states, 54 states have (on average 5.796296296296297) internal successors, (313), 54 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:47,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:47,628 INFO L93 Difference]: Finished difference Result 308 states and 312 transitions. [2023-02-16 01:26:47,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2023-02-16 01:26:47,628 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 5.796296296296297) internal successors, (313), 54 states have internal predecessors, (313), 0 states have call successors, (0), 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 290 [2023-02-16 01:26:47,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:47,629 INFO L225 Difference]: With dead ends: 308 [2023-02-16 01:26:47,629 INFO L226 Difference]: Without dead ends: 306 [2023-02-16 01:26:47,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 531 SyntacticMatches, 92 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3934, Invalid=6778, Unknown=0, NotChecked=0, Total=10712 [2023-02-16 01:26:47,631 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 158 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:47,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 509 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:26:47,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-16 01:26:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2023-02-16 01:26:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0134228187919463) internal successors, (302), 298 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 302 transitions. [2023-02-16 01:26:47,661 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 302 transitions. Word has length 290 [2023-02-16 01:26:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:47,662 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 302 transitions. [2023-02-16 01:26:47,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 5.796296296296297) internal successors, (313), 54 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 302 transitions. [2023-02-16 01:26:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-02-16 01:26:47,663 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:47,663 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:47,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-02-16 01:26:47,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:47,869 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:47,870 INFO L85 PathProgramCache]: Analyzing trace with hash -727992461, now seen corresponding path program 56 times [2023-02-16 01:26:47,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:47,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323564376] [2023-02-16 01:26:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:47,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 4467 proven. 2397 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:50,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323564376] [2023-02-16 01:26:50,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323564376] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:50,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544708309] [2023-02-16 01:26:50,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:26:50,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:50,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:50,580 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:50,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-16 01:26:50,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:26:50,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:26:50,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-16 01:26:50,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:26:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 4606 proven. 2256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:26:52,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:26:54,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6864 backedges. 4606 proven. 2256 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:26:54,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544708309] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:26:54,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:26:54,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 98, 98] total 149 [2023-02-16 01:26:54,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446225683] [2023-02-16 01:26:54,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:26:54,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2023-02-16 01:26:54,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:26:54,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2023-02-16 01:26:54,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4953, Invalid=17099, Unknown=0, NotChecked=0, Total=22052 [2023-02-16 01:26:54,156 INFO L87 Difference]: Start difference. First operand 299 states and 302 transitions. Second operand has 149 states, 149 states have (on average 3.3422818791946307) internal successors, (498), 149 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:56,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:26:56,015 INFO L93 Difference]: Finished difference Result 690 states and 790 transitions. [2023-02-16 01:26:56,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-16 01:26:56,015 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 3.3422818791946307) internal successors, (498), 149 states have internal predecessors, (498), 0 states have call successors, (0), 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 298 [2023-02-16 01:26:56,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:26:56,017 INFO L225 Difference]: With dead ends: 690 [2023-02-16 01:26:56,017 INFO L226 Difference]: Without dead ends: 493 [2023-02-16 01:26:56,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 452 SyntacticMatches, 94 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14471 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=9659, Invalid=28953, Unknown=0, NotChecked=0, Total=38612 [2023-02-16 01:26:56,019 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 736 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 1270 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:26:56,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [736 Valid, 1135 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1270 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:26:56,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-16 01:26:56,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 301. [2023-02-16 01:26:56,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 304 transitions. [2023-02-16 01:26:56,106 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 304 transitions. Word has length 298 [2023-02-16 01:26:56,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:26:56,106 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 304 transitions. [2023-02-16 01:26:56,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 3.3422818791946307) internal successors, (498), 149 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:26:56,106 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 304 transitions. [2023-02-16 01:26:56,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-02-16 01:26:56,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:26:56,107 INFO L195 NwaCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:26:56,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-16 01:26:56,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:56,313 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:26:56,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:26:56,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1199032792, now seen corresponding path program 57 times [2023-02-16 01:26:56,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:26:56,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362645127] [2023-02-16 01:26:56,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:26:56,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:26:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:26:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4467 proven. 2493 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:26:59,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:26:59,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362645127] [2023-02-16 01:26:59,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362645127] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:26:59,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775526716] [2023-02-16 01:26:59,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:26:59,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:26:59,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:26:59,702 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:26:59,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-16 01:26:59,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 49 check-sat command(s) [2023-02-16 01:26:59,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:26:59,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 100 conjunts are in the unsatisfiable core [2023-02-16 01:26:59,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:27:02,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:02,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:27:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6960 backedges. 4608 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:03,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775526716] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:27:03,983 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:27:03,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100, 100] total 151 [2023-02-16 01:27:03,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400233050] [2023-02-16 01:27:03,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:27:03,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-02-16 01:27:03,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:27:03,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-02-16 01:27:03,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5103, Invalid=17547, Unknown=0, NotChecked=0, Total=22650 [2023-02-16 01:27:03,985 INFO L87 Difference]: Start difference. First operand 301 states and 304 transitions. Second operand has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:27:05,602 INFO L93 Difference]: Finished difference Result 698 states and 800 transitions. [2023-02-16 01:27:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-16 01:27:05,603 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 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 300 [2023-02-16 01:27:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:27:05,604 INFO L225 Difference]: With dead ends: 698 [2023-02-16 01:27:05,604 INFO L226 Difference]: Without dead ends: 499 [2023-02-16 01:27:05,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 747 GetRequests, 453 SyntacticMatches, 96 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14872 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=10005, Invalid=29795, Unknown=0, NotChecked=0, Total=39800 [2023-02-16 01:27:05,607 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 772 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 1219 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:27:05,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 1219 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:27:05,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-02-16 01:27:05,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 303. [2023-02-16 01:27:05,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.0132450331125828) internal successors, (306), 302 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:05,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 306 transitions. [2023-02-16 01:27:05,661 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 306 transitions. Word has length 300 [2023-02-16 01:27:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:27:05,662 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 306 transitions. [2023-02-16 01:27:05,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 3.3112582781456954) internal successors, (500), 151 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 306 transitions. [2023-02-16 01:27:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2023-02-16 01:27:05,681 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:27:05,681 INFO L195 NwaCegarLoop]: trace histogram [50, 49, 49, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:27:05,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-02-16 01:27:05,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-16 01:27:05,882 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:27:05,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:27:05,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1939396349, now seen corresponding path program 58 times [2023-02-16 01:27:05,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:27:05,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945770942] [2023-02-16 01:27:05,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:27:05,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:27:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2352 proven. 4706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:08,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:27:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945770942] [2023-02-16 01:27:08,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945770942] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:27:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000977656] [2023-02-16 01:27:08,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:27:08,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:08,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:27:08,136 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:27:08,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-16 01:27:08,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:27:08,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:27:08,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1115 conjuncts, 104 conjunts are in the unsatisfiable core [2023-02-16 01:27:08,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:27:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:08,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:27:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 7058 backedges. 2450 proven. 4608 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:09,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000977656] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:27:09,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:27:09,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2023-02-16 01:27:09,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912739045] [2023-02-16 01:27:09,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:27:09,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-16 01:27:09,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:27:09,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-16 01:27:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1387, Invalid=1693, Unknown=0, NotChecked=0, Total=3080 [2023-02-16 01:27:09,999 INFO L87 Difference]: Start difference. First operand 303 states and 306 transitions. Second operand has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:27:10,860 INFO L93 Difference]: Finished difference Result 320 states and 324 transitions. [2023-02-16 01:27:10,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-16 01:27:10,860 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 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 302 [2023-02-16 01:27:10,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:27:10,861 INFO L225 Difference]: With dead ends: 320 [2023-02-16 01:27:10,861 INFO L226 Difference]: Without dead ends: 318 [2023-02-16 01:27:10,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 553 SyntacticMatches, 96 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5526 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4247, Invalid=7309, Unknown=0, NotChecked=0, Total=11556 [2023-02-16 01:27:10,863 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 314 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:27:10,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [314 Valid, 405 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:27:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2023-02-16 01:27:10,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 311. [2023-02-16 01:27:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:10,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 314 transitions. [2023-02-16 01:27:10,895 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 314 transitions. Word has length 302 [2023-02-16 01:27:10,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:27:10,895 INFO L495 AbstractCegarLoop]: Abstraction has 311 states and 314 transitions. [2023-02-16 01:27:10,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 5.803571428571429) internal successors, (325), 56 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 314 transitions. [2023-02-16 01:27:10,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2023-02-16 01:27:10,897 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:27:10,897 INFO L195 NwaCegarLoop]: trace histogram [51, 50, 50, 50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:27:10,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-16 01:27:11,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-02-16 01:27:11,099 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:27:11,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:27:11,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1043276829, now seen corresponding path program 59 times [2023-02-16 01:27:11,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:27:11,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887732814] [2023-02-16 01:27:11,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:27:11,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:27:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 4853 proven. 2597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:14,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:27:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887732814] [2023-02-16 01:27:14,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887732814] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:27:14,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528566271] [2023-02-16 01:27:14,116 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:27:14,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:14,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:27:14,117 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:27:14,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-16 01:27:14,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 51 check-sat command(s) [2023-02-16 01:27:14,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:27:14,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 103 conjunts are in the unsatisfiable core [2023-02-16 01:27:14,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:27:16,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:16,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:27:18,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7450 backedges. 5000 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:18,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528566271] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:27:18,301 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:27:18,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103, 103] total 158 [2023-02-16 01:27:18,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653283035] [2023-02-16 01:27:18,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:27:18,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2023-02-16 01:27:18,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:27:18,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2023-02-16 01:27:18,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5620, Invalid=19186, Unknown=0, NotChecked=0, Total=24806 [2023-02-16 01:27:18,304 INFO L87 Difference]: Start difference. First operand 311 states and 314 transitions. Second operand has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:27:21,725 INFO L93 Difference]: Finished difference Result 925 states and 1032 transitions. [2023-02-16 01:27:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 154 states. [2023-02-16 01:27:21,726 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 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 310 [2023-02-16 01:27:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:27:21,727 INFO L225 Difference]: With dead ends: 925 [2023-02-16 01:27:21,727 INFO L226 Difference]: Without dead ends: 519 [2023-02-16 01:27:21,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 468 SyntacticMatches, 97 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22455 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=16176, Invalid=50646, Unknown=0, NotChecked=0, Total=66822 [2023-02-16 01:27:21,730 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 936 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1530 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1378 SdHoareTripleChecker+Invalid, 1790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 1530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-16 01:27:21,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 1378 Invalid, 1790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 1530 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-16 01:27:21,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2023-02-16 01:27:21,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 315. [2023-02-16 01:27:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0127388535031847) internal successors, (318), 314 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:21,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2023-02-16 01:27:21,763 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 310 [2023-02-16 01:27:21,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:27:21,763 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2023-02-16 01:27:21,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.3354430379746836) internal successors, (527), 158 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:21,764 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2023-02-16 01:27:21,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2023-02-16 01:27:21,765 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:27:21,765 INFO L195 NwaCegarLoop]: trace histogram [52, 51, 51, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:27:21,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-02-16 01:27:21,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-02-16 01:27:21,971 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:27:21,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:27:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1035533421, now seen corresponding path program 60 times [2023-02-16 01:27:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:27:21,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481778473] [2023-02-16 01:27:21,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:27:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:27:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:24,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2550 proven. 5102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:24,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:27:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481778473] [2023-02-16 01:27:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481778473] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:27:24,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024581277] [2023-02-16 01:27:24,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:27:24,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:24,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:27:24,515 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:27:24,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-16 01:27:24,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 52 check-sat command(s) [2023-02-16 01:27:24,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:27:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 1159 conjuncts, 108 conjunts are in the unsatisfiable core [2023-02-16 01:27:24,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:27:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:25,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:27:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7652 backedges. 2652 proven. 5000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:26,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024581277] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:27:26,600 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:27:26,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 58 [2023-02-16 01:27:26,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467859675] [2023-02-16 01:27:26,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:27:26,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-02-16 01:27:26,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:27:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-02-16 01:27:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1494, Invalid=1812, Unknown=0, NotChecked=0, Total=3306 [2023-02-16 01:27:26,601 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:27:27,204 INFO L93 Difference]: Finished difference Result 332 states and 336 transitions. [2023-02-16 01:27:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-02-16 01:27:27,204 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 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 314 [2023-02-16 01:27:27,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:27:27,205 INFO L225 Difference]: With dead ends: 332 [2023-02-16 01:27:27,205 INFO L226 Difference]: Without dead ends: 330 [2023-02-16 01:27:27,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 575 SyntacticMatches, 100 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5956 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4572, Invalid=7860, Unknown=0, NotChecked=0, Total=12432 [2023-02-16 01:27:27,206 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 328 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 328 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:27:27,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [328 Valid, 460 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:27:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2023-02-16 01:27:27,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 323. [2023-02-16 01:27:27,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.0124223602484472) internal successors, (326), 322 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:27,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 326 transitions. [2023-02-16 01:27:27,240 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 326 transitions. Word has length 314 [2023-02-16 01:27:27,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:27:27,241 INFO L495 AbstractCegarLoop]: Abstraction has 323 states and 326 transitions. [2023-02-16 01:27:27,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 5.810344827586207) internal successors, (337), 58 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 326 transitions. [2023-02-16 01:27:27,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2023-02-16 01:27:27,242 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:27:27,242 INFO L195 NwaCegarLoop]: trace histogram [53, 52, 52, 52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:27:27,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-16 01:27:27,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:27,448 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:27:27,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:27:27,448 INFO L85 PathProgramCache]: Analyzing trace with hash 770478419, now seen corresponding path program 61 times [2023-02-16 01:27:27,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:27:27,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837674065] [2023-02-16 01:27:27,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:27:27,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:27:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5255 proven. 2805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:30,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:27:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837674065] [2023-02-16 01:27:30,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837674065] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:27:30,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159864625] [2023-02-16 01:27:30,731 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:27:30,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:27:30,732 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:27:30,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-16 01:27:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:30,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 1183 conjuncts, 106 conjunts are in the unsatisfiable core [2023-02-16 01:27:30,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:27:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:27:33,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:27:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 8060 backedges. 5406 proven. 2652 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-16 01:27:35,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159864625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:27:35,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:27:35,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 106] total 161 [2023-02-16 01:27:35,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322863841] [2023-02-16 01:27:35,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:27:35,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2023-02-16 01:27:35,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:27:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2023-02-16 01:27:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5781, Invalid=19979, Unknown=0, NotChecked=0, Total=25760 [2023-02-16 01:27:35,299 INFO L87 Difference]: Start difference. First operand 323 states and 326 transitions. Second operand has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:37,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:27:37,101 INFO L93 Difference]: Finished difference Result 746 states and 854 transitions. [2023-02-16 01:27:37,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2023-02-16 01:27:37,101 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 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 322 [2023-02-16 01:27:37,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:27:37,103 INFO L225 Difference]: With dead ends: 746 [2023-02-16 01:27:37,103 INFO L226 Difference]: Without dead ends: 533 [2023-02-16 01:27:37,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 488 SyntacticMatches, 102 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16927 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=11295, Invalid=33861, Unknown=0, NotChecked=0, Total=45156 [2023-02-16 01:27:37,110 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1024 mSDsluCounter, 1106 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-16 01:27:37,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 1215 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-16 01:27:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-02-16 01:27:37,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 325. [2023-02-16 01:27:37,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 1.0123456790123457) internal successors, (328), 324 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2023-02-16 01:27:37,150 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 322 [2023-02-16 01:27:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:27:37,150 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2023-02-16 01:27:37,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 3.341614906832298) internal successors, (538), 161 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2023-02-16 01:27:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2023-02-16 01:27:37,151 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:27:37,151 INFO L195 NwaCegarLoop]: trace histogram [53, 53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:27:37,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-02-16 01:27:37,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:37,357 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:27:37,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:27:37,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1497433272, now seen corresponding path program 62 times [2023-02-16 01:27:37,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:27:37,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485307551] [2023-02-16 01:27:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:27:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:27:37,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5255 proven. 2909 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:40,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:27:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485307551] [2023-02-16 01:27:40,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485307551] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:27:40,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787494521] [2023-02-16 01:27:40,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-16 01:27:40,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:40,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:27:40,679 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:27:40,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-02-16 01:27:40,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-16 01:27:40,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:27:40,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 108 conjunts are in the unsatisfiable core [2023-02-16 01:27:40,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:27:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5408 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:43,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:27:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 8164 backedges. 5408 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:45,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787494521] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:27:45,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:27:45,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108, 108] total 163 [2023-02-16 01:27:45,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428352604] [2023-02-16 01:27:45,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:27:45,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-02-16 01:27:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:27:45,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-02-16 01:27:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5943, Invalid=20463, Unknown=0, NotChecked=0, Total=26406 [2023-02-16 01:27:45,599 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand has 163 states, 163 states have (on average 3.312883435582822) internal successors, (540), 163 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:47,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:27:47,890 INFO L93 Difference]: Finished difference Result 754 states and 864 transitions. [2023-02-16 01:27:47,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-02-16 01:27:47,890 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 3.312883435582822) internal successors, (540), 163 states have internal predecessors, (540), 0 states have call successors, (0), 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 324 [2023-02-16 01:27:47,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:27:47,892 INFO L225 Difference]: With dead ends: 754 [2023-02-16 01:27:47,892 INFO L226 Difference]: Without dead ends: 539 [2023-02-16 01:27:47,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 489 SyntacticMatches, 104 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17360 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=11669, Invalid=34771, Unknown=0, NotChecked=0, Total=46440 [2023-02-16 01:27:47,896 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 879 mSDsluCounter, 1190 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 1681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:27:47,896 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [879 Valid, 1301 Invalid, 1681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:27:47,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2023-02-16 01:27:47,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 327. [2023-02-16 01:27:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.0122699386503067) internal successors, (330), 326 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:47,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 330 transitions. [2023-02-16 01:27:47,932 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 330 transitions. Word has length 324 [2023-02-16 01:27:47,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:27:47,932 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 330 transitions. [2023-02-16 01:27:47,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 3.312883435582822) internal successors, (540), 163 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:47,932 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 330 transitions. [2023-02-16 01:27:47,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2023-02-16 01:27:47,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:27:47,934 INFO L195 NwaCegarLoop]: trace histogram [54, 53, 53, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:27:47,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-02-16 01:27:48,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-02-16 01:27:48,139 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:27:48,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:27:48,141 INFO L85 PathProgramCache]: Analyzing trace with hash 21377757, now seen corresponding path program 63 times [2023-02-16 01:27:48,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:27:48,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030120205] [2023-02-16 01:27:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:27:48,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:27:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 8270 backedges. 2756 proven. 5514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:50,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:27:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030120205] [2023-02-16 01:27:50,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030120205] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:27:50,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746765792] [2023-02-16 01:27:50,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-16 01:27:50,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:50,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:27:50,572 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:27:50,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-02-16 01:27:50,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2023-02-16 01:27:50,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:27:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-16 01:27:50,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:27:51,036 INFO L134 CoverageAnalysis]: Checked inductivity of 8270 backedges. 2862 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:51,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:27:52,944 INFO L134 CoverageAnalysis]: Checked inductivity of 8270 backedges. 2862 proven. 5408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:52,944 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746765792] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:27:52,944 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:27:52,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 60 [2023-02-16 01:27:52,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278924460] [2023-02-16 01:27:52,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:27:52,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-16 01:27:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:27:52,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-16 01:27:52,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1605, Invalid=1935, Unknown=0, NotChecked=0, Total=3540 [2023-02-16 01:27:52,946 INFO L87 Difference]: Start difference. First operand 327 states and 330 transitions. Second operand has 60 states, 60 states have (on average 5.816666666666666) internal successors, (349), 60 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:27:53,670 INFO L93 Difference]: Finished difference Result 344 states and 348 transitions. [2023-02-16 01:27:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2023-02-16 01:27:53,671 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 5.816666666666666) internal successors, (349), 60 states have internal predecessors, (349), 0 states have call successors, (0), 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 326 [2023-02-16 01:27:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:27:53,672 INFO L225 Difference]: With dead ends: 344 [2023-02-16 01:27:53,672 INFO L226 Difference]: Without dead ends: 342 [2023-02-16 01:27:53,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 597 SyntacticMatches, 104 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6402 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4909, Invalid=8431, Unknown=0, NotChecked=0, Total=13340 [2023-02-16 01:27:53,673 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 176 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-16 01:27:53,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 547 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-16 01:27:53,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-02-16 01:27:53,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 335. [2023-02-16 01:27:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.0119760479041917) internal successors, (338), 334 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 338 transitions. [2023-02-16 01:27:53,710 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 338 transitions. Word has length 326 [2023-02-16 01:27:53,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:27:53,711 INFO L495 AbstractCegarLoop]: Abstraction has 335 states and 338 transitions. [2023-02-16 01:27:53,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 5.816666666666666) internal successors, (349), 60 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:27:53,711 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 338 transitions. [2023-02-16 01:27:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2023-02-16 01:27:53,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:27:53,712 INFO L195 NwaCegarLoop]: trace histogram [55, 54, 54, 54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:27:53,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-02-16 01:27:53,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-02-16 01:27:53,916 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:27:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:27:53,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1641306051, now seen corresponding path program 64 times [2023-02-16 01:27:53,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:27:53,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839650619] [2023-02-16 01:27:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:27:53,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:27:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:27:57,531 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 5673 proven. 3021 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:27:57,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:27:57,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839650619] [2023-02-16 01:27:57,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839650619] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:27:57,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101633265] [2023-02-16 01:27:57,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-16 01:27:57,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:27:57,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:27:57,533 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:27:57,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-02-16 01:27:57,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-16 01:27:57,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:27:57,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 1227 conjuncts, 111 conjunts are in the unsatisfiable core [2023-02-16 01:27:57,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:28:00,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 5832 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:00,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:28:02,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 5832 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:02,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101633265] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:28:02,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:28:02,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111, 111] total 170 [2023-02-16 01:28:02,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873336053] [2023-02-16 01:28:02,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:28:02,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2023-02-16 01:28:02,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:28:02,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2023-02-16 01:28:02,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6500, Invalid=22230, Unknown=0, NotChecked=0, Total=28730 [2023-02-16 01:28:02,050 INFO L87 Difference]: Start difference. First operand 335 states and 338 transitions. Second operand has 170 states, 170 states have (on average 3.335294117647059) internal successors, (567), 170 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:28:05,322 INFO L93 Difference]: Finished difference Result 997 states and 1112 transitions. [2023-02-16 01:28:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2023-02-16 01:28:05,322 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 3.335294117647059) internal successors, (567), 170 states have internal predecessors, (567), 0 states have call successors, (0), 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 334 [2023-02-16 01:28:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:28:05,324 INFO L225 Difference]: With dead ends: 997 [2023-02-16 01:28:05,324 INFO L226 Difference]: Without dead ends: 559 [2023-02-16 01:28:05,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 504 SyntacticMatches, 105 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26089 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=18764, Invalid=58798, Unknown=0, NotChecked=0, Total=77562 [2023-02-16 01:28:05,329 INFO L413 NwaCegarLoop]: 113 mSDtfsCounter, 976 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 2031 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 976 SdHoareTripleChecker+Valid, 1879 SdHoareTripleChecker+Invalid, 2303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:28:05,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [976 Valid, 1879 Invalid, 2303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2031 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:28:05,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2023-02-16 01:28:05,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 339. [2023-02-16 01:28:05,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.0118343195266273) internal successors, (342), 338 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:05,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 342 transitions. [2023-02-16 01:28:05,368 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 342 transitions. Word has length 334 [2023-02-16 01:28:05,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:28:05,369 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 342 transitions. [2023-02-16 01:28:05,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 3.335294117647059) internal successors, (567), 170 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:05,369 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 342 transitions. [2023-02-16 01:28:05,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2023-02-16 01:28:05,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:28:05,370 INFO L195 NwaCegarLoop]: trace histogram [56, 55, 55, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:28:05,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2023-02-16 01:28:05,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:28:05,576 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:28:05,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:28:05,576 INFO L85 PathProgramCache]: Analyzing trace with hash -244975027, now seen corresponding path program 65 times [2023-02-16 01:28:05,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:28:05,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106273571] [2023-02-16 01:28:05,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:28:05,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:28:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:28:08,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8912 backedges. 2970 proven. 5942 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:08,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:28:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106273571] [2023-02-16 01:28:08,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106273571] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:28:08,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075652222] [2023-02-16 01:28:08,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-16 01:28:08,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:28:08,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:28:08,388 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:28:08,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-02-16 01:28:08,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2023-02-16 01:28:08,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:28:08,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 116 conjunts are in the unsatisfiable core [2023-02-16 01:28:08,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:28:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8912 backedges. 3080 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:08,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:28:11,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8912 backedges. 3080 proven. 5832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:11,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075652222] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:28:11,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:28:11,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 62 [2023-02-16 01:28:11,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162054188] [2023-02-16 01:28:11,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:28:11,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-16 01:28:11,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:28:11,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-16 01:28:11,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1720, Invalid=2062, Unknown=0, NotChecked=0, Total=3782 [2023-02-16 01:28:11,053 INFO L87 Difference]: Start difference. First operand 339 states and 342 transitions. Second operand has 62 states, 62 states have (on average 5.82258064516129) internal successors, (361), 62 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:11,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:28:11,739 INFO L93 Difference]: Finished difference Result 356 states and 360 transitions. [2023-02-16 01:28:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-02-16 01:28:11,740 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 5.82258064516129) internal successors, (361), 62 states have internal predecessors, (361), 0 states have call successors, (0), 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 338 [2023-02-16 01:28:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:28:11,741 INFO L225 Difference]: With dead ends: 356 [2023-02-16 01:28:11,741 INFO L226 Difference]: Without dead ends: 354 [2023-02-16 01:28:11,742 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 619 SyntacticMatches, 108 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6864 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5258, Invalid=9022, Unknown=0, NotChecked=0, Total=14280 [2023-02-16 01:28:11,743 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 354 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:28:11,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 465 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:28:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2023-02-16 01:28:11,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 347. [2023-02-16 01:28:11,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.0115606936416186) internal successors, (350), 346 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 350 transitions. [2023-02-16 01:28:11,783 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 350 transitions. Word has length 338 [2023-02-16 01:28:11,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:28:11,784 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 350 transitions. [2023-02-16 01:28:11,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 5.82258064516129) internal successors, (361), 62 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:11,784 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 350 transitions. [2023-02-16 01:28:11,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2023-02-16 01:28:11,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:28:11,785 INFO L195 NwaCegarLoop]: trace histogram [57, 56, 56, 56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:28:11,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-02-16 01:28:11,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-02-16 01:28:11,991 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:28:11,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:28:11,991 INFO L85 PathProgramCache]: Analyzing trace with hash -751980749, now seen corresponding path program 66 times [2023-02-16 01:28:11,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:28:11,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456229023] [2023-02-16 01:28:11,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:28:11,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:28:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:28:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 6107 proven. 3245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:15,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:28:15,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456229023] [2023-02-16 01:28:15,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456229023] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:28:15,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111184831] [2023-02-16 01:28:15,939 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-16 01:28:15,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:28:15,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:28:15,940 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:28:15,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2023-02-16 01:28:16,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2023-02-16 01:28:16,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-16 01:28:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1271 conjuncts, 115 conjunts are in the unsatisfiable core [2023-02-16 01:28:16,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:28:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 6272 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:18,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:28:20,817 INFO L134 CoverageAnalysis]: Checked inductivity of 9352 backedges. 6272 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:20,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111184831] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:28:20,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:28:20,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115, 115] total 176 [2023-02-16 01:28:20,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969295150] [2023-02-16 01:28:20,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:28:20,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2023-02-16 01:28:20,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:28:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2023-02-16 01:28:20,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6964, Invalid=23836, Unknown=0, NotChecked=0, Total=30800 [2023-02-16 01:28:20,821 INFO L87 Difference]: Start difference. First operand 347 states and 350 transitions. Second operand has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:24,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:28:24,327 INFO L93 Difference]: Finished difference Result 1033 states and 1152 transitions. [2023-02-16 01:28:24,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2023-02-16 01:28:24,327 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 0 states have call successors, (0), 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 346 [2023-02-16 01:28:24,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:28:24,329 INFO L225 Difference]: With dead ends: 1033 [2023-02-16 01:28:24,329 INFO L226 Difference]: Without dead ends: 579 [2023-02-16 01:28:24,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 918 GetRequests, 522 SyntacticMatches, 109 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28008 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=20130, Invalid=63102, Unknown=0, NotChecked=0, Total=83232 [2023-02-16 01:28:24,333 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 1020 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1020 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 2009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-16 01:28:24,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1020 Valid, 1562 Invalid, 2009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-16 01:28:24,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2023-02-16 01:28:24,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 351. [2023-02-16 01:28:24,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.0114285714285713) internal successors, (354), 350 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:24,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 354 transitions. [2023-02-16 01:28:24,390 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 354 transitions. Word has length 346 [2023-02-16 01:28:24,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:28:24,390 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 354 transitions. [2023-02-16 01:28:24,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 3.335227272727273) internal successors, (587), 176 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:24,391 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 354 transitions. [2023-02-16 01:28:24,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2023-02-16 01:28:24,392 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:28:24,392 INFO L195 NwaCegarLoop]: trace histogram [58, 57, 57, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:28:24,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2023-02-16 01:28:24,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2023-02-16 01:28:24,599 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:28:24,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:28:24,599 INFO L85 PathProgramCache]: Analyzing trace with hash 234738365, now seen corresponding path program 67 times [2023-02-16 01:28:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:28:24,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179969877] [2023-02-16 01:28:24,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:28:24,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:28:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:28:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 9578 backedges. 3192 proven. 6386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:27,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-16 01:28:27,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179969877] [2023-02-16 01:28:27,801 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179969877] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-16 01:28:27,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451665890] [2023-02-16 01:28:27,801 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-16 01:28:27,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-16 01:28:27,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-16 01:28:27,802 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-16 01:28:27,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2023-02-16 01:28:27,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-16 01:28:27,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 1291 conjuncts, 120 conjunts are in the unsatisfiable core [2023-02-16 01:28:27,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-16 01:28:28,357 INFO L134 CoverageAnalysis]: Checked inductivity of 9578 backedges. 3306 proven. 6272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:28,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-16 01:28:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9578 backedges. 3306 proven. 6272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-16 01:28:30,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451665890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-16 01:28:30,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-16 01:28:30,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 64 [2023-02-16 01:28:30,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911470047] [2023-02-16 01:28:30,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-16 01:28:30,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-16 01:28:30,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-16 01:28:30,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-16 01:28:30,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1839, Invalid=2193, Unknown=0, NotChecked=0, Total=4032 [2023-02-16 01:28:30,230 INFO L87 Difference]: Start difference. First operand 351 states and 354 transitions. Second operand has 64 states, 64 states have (on average 5.828125) internal successors, (373), 64 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-16 01:28:30,930 INFO L93 Difference]: Finished difference Result 368 states and 372 transitions. [2023-02-16 01:28:30,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2023-02-16 01:28:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 5.828125) internal successors, (373), 64 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 350 [2023-02-16 01:28:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-16 01:28:30,932 INFO L225 Difference]: With dead ends: 368 [2023-02-16 01:28:30,932 INFO L226 Difference]: Without dead ends: 366 [2023-02-16 01:28:30,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 641 SyntacticMatches, 112 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7342 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5619, Invalid=9633, Unknown=0, NotChecked=0, Total=15252 [2023-02-16 01:28:30,934 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 186 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-16 01:28:30,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 546 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-16 01:28:30,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2023-02-16 01:28:30,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 359. [2023-02-16 01:28:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.011173184357542) internal successors, (362), 358 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:30,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 362 transitions. [2023-02-16 01:28:30,978 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 362 transitions. Word has length 350 [2023-02-16 01:28:30,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-16 01:28:30,978 INFO L495 AbstractCegarLoop]: Abstraction has 359 states and 362 transitions. [2023-02-16 01:28:30,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 5.828125) internal successors, (373), 64 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-16 01:28:30,978 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 362 transitions. [2023-02-16 01:28:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2023-02-16 01:28:30,979 INFO L187 NwaCegarLoop]: Found error trace [2023-02-16 01:28:30,979 INFO L195 NwaCegarLoop]: trace histogram [59, 58, 58, 58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-16 01:28:30,985 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2023-02-16 01:28:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2023-02-16 01:28:31,185 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-16 01:28:31,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-16 01:28:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 73275299, now seen corresponding path program 68 times [2023-02-16 01:28:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-16 01:28:31,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354621123] [2023-02-16 01:28:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-16 01:28:31,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-16 01:28:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat