./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_partition_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/array-examples/standard_partition_ground-1.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 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 09:53:48,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 09:53:48,395 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 09:53:48,429 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 09:53:48,430 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 09:53:48,432 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 09:53:48,434 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 09:53:48,436 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 09:53:48,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 09:53:48,443 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 09:53:48,444 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 09:53:48,446 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 09:53:48,446 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 09:53:48,448 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 09:53:48,450 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 09:53:48,451 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 09:53:48,452 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 09:53:48,453 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 09:53:48,454 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 09:53:48,459 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 09:53:48,460 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 09:53:48,465 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 09:53:48,466 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 09:53:48,467 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 09:53:48,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 09:53:48,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 09:53:48,476 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 09:53:48,477 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 09:53:48,477 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 09:53:48,478 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 09:53:48,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 09:53:48,479 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 09:53:48,481 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 09:53:48,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 09:53:48,483 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 09:53:48,483 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 09:53:48,484 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 09:53:48,484 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 09:53:48,484 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 09:53:48,486 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 09:53:48,486 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 09:53:48,487 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 09:53:48,523 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 09:53:48,523 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 09:53:48,524 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 09:53:48,524 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 09:53:48,525 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 09:53:48,525 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 09:53:48,525 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 09:53:48,525 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 09:53:48,526 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 09:53:48,526 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 09:53:48,526 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 09:53:48,527 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 09:53:48,527 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 09:53:48,527 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 09:53:48,527 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 09:53:48,527 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 09:53:48,528 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 09:53:48,528 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 09:53:48,528 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 09:53:48,528 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 09:53:48,528 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 09:53:48,528 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 09:53:48,529 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 09:53:48,529 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 09:53:48,529 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 09:53:48,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 09:53:48,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 09:53:48,530 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 09:53:48,530 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 09:53:48,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 09:53:48,530 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 09:53:48,531 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 09:53:48,531 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 09:53:48,531 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 09:53:48,531 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 09:53:48,532 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c4a57140d9977d38b2a20d40c88df51a4fcb7b14a0fb7c51e0b4e36cddf9998 [2023-02-18 09:53:48,738 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 09:53:48,768 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 09:53:48,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 09:53:48,771 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 09:53:48,771 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 09:53:48,772 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2023-02-18 09:53:49,951 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 09:53:50,161 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 09:53:50,161 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_partition_ground-1.i [2023-02-18 09:53:50,167 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd8b683e/933debd2505f4bc182caca8df75edaf3/FLAG145ca0732 [2023-02-18 09:53:50,180 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3bd8b683e/933debd2505f4bc182caca8df75edaf3 [2023-02-18 09:53:50,181 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 09:53:50,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 09:53:50,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 09:53:50,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 09:53:50,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 09:53:50,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,190 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48685101 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50, skipping insertion in model container [2023-02-18 09:53:50,190 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 09:53:50,213 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 09:53:50,320 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/array-examples/standard_partition_ground-1.i[860,873] [2023-02-18 09:53:50,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 09:53:50,341 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 09:53:50,352 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/array-examples/standard_partition_ground-1.i[860,873] [2023-02-18 09:53:50,359 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 09:53:50,370 INFO L208 MainTranslator]: Completed translation [2023-02-18 09:53:50,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50 WrapperNode [2023-02-18 09:53:50,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 09:53:50,372 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 09:53:50,372 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 09:53:50,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 09:53:50,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,398 INFO L138 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 82 [2023-02-18 09:53:50,398 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 09:53:50,399 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 09:53:50,399 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 09:53:50,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 09:53:50,405 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,406 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,408 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,408 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,413 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,417 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,419 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 09:53:50,420 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 09:53:50,420 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 09:53:50,420 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 09:53:50,421 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (1/1) ... [2023-02-18 09:53:50,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 09:53:50,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:50,448 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) [2023-02-18 09:53:50,450 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 [2023-02-18 09:53:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 09:53:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 09:53:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 09:53:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 09:53:50,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 09:53:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 09:53:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 09:53:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-18 09:53:50,488 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-18 09:53:50,488 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 09:53:50,559 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 09:53:50,563 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 09:53:50,786 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 09:53:50,791 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 09:53:50,792 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-18 09:53:50,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:53:50 BoogieIcfgContainer [2023-02-18 09:53:50,794 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 09:53:50,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 09:53:50,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 09:53:50,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 09:53:50,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 09:53:50" (1/3) ... [2023-02-18 09:53:50,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb15fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:53:50, skipping insertion in model container [2023-02-18 09:53:50,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 09:53:50" (2/3) ... [2023-02-18 09:53:50,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fb15fac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 09:53:50, skipping insertion in model container [2023-02-18 09:53:50,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 09:53:50" (3/3) ... [2023-02-18 09:53:50,840 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_partition_ground-1.i [2023-02-18 09:53:50,883 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 09:53:50,883 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 09:53:50,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 09:53:50,942 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;@64e04e47, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 09:53:50,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 09:53:50,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:53:50,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 09:53:50,952 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:50,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:50,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:50,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:50,960 INFO L85 PathProgramCache]: Analyzing trace with hash 25564738, now seen corresponding path program 1 times [2023-02-18 09:53:50,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:50,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020858951] [2023-02-18 09:53:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:51,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:51,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 09:53:51,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:51,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020858951] [2023-02-18 09:53:51,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020858951] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 09:53:51,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 09:53:51,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 09:53:51,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745396061] [2023-02-18 09:53:51,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 09:53:51,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 09:53:51,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:51,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 09:53:51,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 09:53:51,215 INFO L87 Difference]: Start difference. First operand has 29 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:51,242 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2023-02-18 09:53:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 09:53:51,244 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 09:53:51,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:51,249 INFO L225 Difference]: With dead ends: 53 [2023-02-18 09:53:51,249 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 09:53:51,251 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 [2023-02-18 09:53:51,254 INFO L413 NwaCegarLoop]: 35 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, 35 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 [2023-02-18 09:53:51,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 09:53:51,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-18 09:53:51,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:53:51,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2023-02-18 09:53:51,290 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 11 [2023-02-18 09:53:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:51,290 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2023-02-18 09:53:51,291 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:51,291 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2023-02-18 09:53:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-18 09:53:51,292 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:51,292 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:51,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 09:53:51,292 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:51,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:51,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1555088748, now seen corresponding path program 1 times [2023-02-18 09:53:51,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:51,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747652246] [2023-02-18 09:53:51,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:51,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:51,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 09:53:51,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:51,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747652246] [2023-02-18 09:53:51,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747652246] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 09:53:51,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 09:53:51,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-18 09:53:51,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27943907] [2023-02-18 09:53:51,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 09:53:51,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-18 09:53:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-18 09:53:51,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 09:53:51,408 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:51,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:51,461 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2023-02-18 09:53:51,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-18 09:53:51,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-18 09:53:51,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:51,463 INFO L225 Difference]: With dead ends: 51 [2023-02-18 09:53:51,464 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 09:53:51,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-18 09:53:51,466 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:51,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 46 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:51,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 09:53:51,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2023-02-18 09:53:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:53:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-18 09:53:51,479 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 11 [2023-02-18 09:53:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:51,480 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-18 09:53:51,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-18 09:53:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-18 09:53:51,482 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:51,482 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:51,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 09:53:51,483 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:51,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1378811952, now seen corresponding path program 1 times [2023-02-18 09:53:51,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:51,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71493513] [2023-02-18 09:53:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:51,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:51,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 09:53:51,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71493513] [2023-02-18 09:53:51,616 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71493513] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:51,616 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885160588] [2023-02-18 09:53:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:51,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:51,621 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) [2023-02-18 09:53:51,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 09:53:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:51,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-18 09:53:51,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:53:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 09:53:51,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:53:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 09:53:51,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885160588] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:53:51,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:53:51,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-18 09:53:51,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440393171] [2023-02-18 09:53:51,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:53:51,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-18 09:53:51,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:51,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-18 09:53:51,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 09:53:51,774 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:51,843 INFO L93 Difference]: Finished difference Result 66 states and 88 transitions. [2023-02-18 09:53:51,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-18 09:53:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-18 09:53:51,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:51,845 INFO L225 Difference]: With dead ends: 66 [2023-02-18 09:53:51,845 INFO L226 Difference]: Without dead ends: 45 [2023-02-18 09:53:51,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-18 09:53:51,846 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:51,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 90 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-02-18 09:53:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-02-18 09:53:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:53:51,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2023-02-18 09:53:51,854 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 17 [2023-02-18 09:53:51,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:51,854 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2023-02-18 09:53:51,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:51,855 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2023-02-18 09:53:51,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 09:53:51,857 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:51,857 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:51,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 09:53:52,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:52,064 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:52,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:52,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1056905748, now seen corresponding path program 2 times [2023-02-18 09:53:52,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:52,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708418824] [2023-02-18 09:53:52,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:52,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:52,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:52,168 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-02-18 09:53:52,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:52,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708418824] [2023-02-18 09:53:52,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708418824] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 09:53:52,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 09:53:52,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 09:53:52,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939494877] [2023-02-18 09:53:52,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 09:53:52,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 09:53:52,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:52,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 09:53:52,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 09:53:52,171 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:52,210 INFO L93 Difference]: Finished difference Result 96 states and 122 transitions. [2023-02-18 09:53:52,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 09:53:52,211 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 09:53:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:52,212 INFO L225 Difference]: With dead ends: 96 [2023-02-18 09:53:52,212 INFO L226 Difference]: Without dead ends: 81 [2023-02-18 09:53:52,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 09:53:52,214 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:52,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 09:53:52,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-18 09:53:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2023-02-18 09:53:52,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:53:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 93 transitions. [2023-02-18 09:53:52,224 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 93 transitions. Word has length 35 [2023-02-18 09:53:52,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:52,225 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 93 transitions. [2023-02-18 09:53:52,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,225 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 93 transitions. [2023-02-18 09:53:52,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-18 09:53:52,226 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:52,226 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-18 09:53:52,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:52,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash 748532586, now seen corresponding path program 1 times [2023-02-18 09:53:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:52,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125827499] [2023-02-18 09:53:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:52,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 09:53:52,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:52,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125827499] [2023-02-18 09:53:52,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125827499] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:52,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386151715] [2023-02-18 09:53:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:52,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:52,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:52,406 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) [2023-02-18 09:53:52,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 09:53:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 09:53:52,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:53:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 09:53:52,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:53:52,609 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-18 09:53:52,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386151715] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:53:52,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:53:52,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-18 09:53:52,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605104902] [2023-02-18 09:53:52,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:53:52,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-18 09:53:52,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:52,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-18 09:53:52,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-18 09:53:52,619 INFO L87 Difference]: Start difference. First operand 72 states and 93 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:52,762 INFO L93 Difference]: Finished difference Result 190 states and 271 transitions. [2023-02-18 09:53:52,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 09:53:52,763 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-18 09:53:52,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:52,767 INFO L225 Difference]: With dead ends: 190 [2023-02-18 09:53:52,768 INFO L226 Difference]: Without dead ends: 144 [2023-02-18 09:53:52,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-18 09:53:52,770 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 77 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:52,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 159 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 09:53:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-18 09:53:52,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2023-02-18 09:53:52,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 140 states have (on average 1.3214285714285714) internal successors, (185), 140 states have internal predecessors, (185), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:53:52,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 189 transitions. [2023-02-18 09:53:52,800 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 189 transitions. Word has length 35 [2023-02-18 09:53:52,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:52,801 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 189 transitions. [2023-02-18 09:53:52,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 189 transitions. [2023-02-18 09:53:52,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-18 09:53:52,807 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:52,807 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:52,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 09:53:53,013 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 [2023-02-18 09:53:53,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:53,014 INFO L85 PathProgramCache]: Analyzing trace with hash -737484630, now seen corresponding path program 2 times [2023-02-18 09:53:53,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:53,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100054502] [2023-02-18 09:53:53,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:53,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:53,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-18 09:53:53,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:53,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100054502] [2023-02-18 09:53:53,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100054502] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:53,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020731416] [2023-02-18 09:53:53,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 09:53:53,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:53,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:53,353 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) [2023-02-18 09:53:53,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 09:53:53,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 09:53:53,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:53:53,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-18 09:53:53,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:53:53,561 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-18 09:53:53,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:53:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-02-18 09:53:53,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020731416] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:53:53,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:53:53,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-18 09:53:53,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642039592] [2023-02-18 09:53:53,729 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:53:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-18 09:53:53,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:53:53,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-18 09:53:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-18 09:53:53,731 INFO L87 Difference]: Start difference. First operand 144 states and 189 transitions. Second operand has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:53:53,958 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2023-02-18 09:53:53,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-18 09:53:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-18 09:53:53,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:53:53,960 INFO L225 Difference]: With dead ends: 370 [2023-02-18 09:53:53,960 INFO L226 Difference]: Without dead ends: 288 [2023-02-18 09:53:53,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-18 09:53:53,962 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 233 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-18 09:53:53,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 143 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-18 09:53:53,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-18 09:53:53,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2023-02-18 09:53:53,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 284 states have (on average 1.3274647887323943) internal successors, (377), 284 states have internal predecessors, (377), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:53:53,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 381 transitions. [2023-02-18 09:53:53,980 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 381 transitions. Word has length 71 [2023-02-18 09:53:53,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:53:53,980 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 381 transitions. [2023-02-18 09:53:53,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.16) internal successors, (79), 25 states have internal predecessors, (79), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:53:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 381 transitions. [2023-02-18 09:53:53,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-02-18 09:53:53,982 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:53:53,982 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:53:53,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 09:53:54,188 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 [2023-02-18 09:53:54,188 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:53:54,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:53:54,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1759255338, now seen corresponding path program 3 times [2023-02-18 09:53:54,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:53:54,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375950981] [2023-02-18 09:53:54,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:53:54,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:53:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:53:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 09:53:55,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:53:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375950981] [2023-02-18 09:53:55,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375950981] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:53:55,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539002126] [2023-02-18 09:53:55,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 09:53:55,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:53:55,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:53:55,036 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) [2023-02-18 09:53:55,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 09:54:16,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-18 09:54:16,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:54:16,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-18 09:54:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:54:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 09:54:16,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:54:17,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2023-02-18 09:54:17,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539002126] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:54:17,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:54:17,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-18 09:54:17,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002166413] [2023-02-18 09:54:17,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:54:17,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 09:54:17,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:54:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 09:54:17,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 09:54:17,418 INFO L87 Difference]: Start difference. First operand 288 states and 381 transitions. Second operand has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:17,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:54:17,929 INFO L93 Difference]: Finished difference Result 730 states and 1063 transitions. [2023-02-18 09:54:17,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-18 09:54:17,930 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-02-18 09:54:17,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:54:17,933 INFO L225 Difference]: With dead ends: 730 [2023-02-18 09:54:17,933 INFO L226 Difference]: Without dead ends: 576 [2023-02-18 09:54:17,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 240 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 09:54:17,937 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 610 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 09:54:17,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [610 Valid, 193 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 09:54:17,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2023-02-18 09:54:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2023-02-18 09:54:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 572 states have (on average 1.3304195804195804) internal successors, (761), 572 states have internal predecessors, (761), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:54:17,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 765 transitions. [2023-02-18 09:54:17,956 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 765 transitions. Word has length 143 [2023-02-18 09:54:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:54:17,959 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 765 transitions. [2023-02-18 09:54:17,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0816326530612246) internal successors, (151), 49 states have internal predecessors, (151), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:17,960 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 765 transitions. [2023-02-18 09:54:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2023-02-18 09:54:17,970 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:54:17,971 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:54:17,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-18 09:54:18,171 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 [2023-02-18 09:54:18,172 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:54:18,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:54:18,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2061111338, now seen corresponding path program 4 times [2023-02-18 09:54:18,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:54:18,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339779652] [2023-02-18 09:54:18,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:54:18,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:54:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:54:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-02-18 09:54:20,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:54:20,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339779652] [2023-02-18 09:54:20,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339779652] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:54:20,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238809948] [2023-02-18 09:54:20,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 09:54:20,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:20,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:54:20,913 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) [2023-02-18 09:54:20,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 09:54:27,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 09:54:27,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 09:54:27,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-18 09:54:27,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 09:54:28,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-02-18 09:54:28,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 09:54:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6302 backedges. 0 proven. 3151 refuted. 0 times theorem prover too weak. 3151 trivial. 0 not checked. [2023-02-18 09:54:30,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238809948] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 09:54:30,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 09:54:30,663 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 97 [2023-02-18 09:54:30,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443998393] [2023-02-18 09:54:30,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 09:54:30,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-02-18 09:54:30,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 09:54:30,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-02-18 09:54:30,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-02-18 09:54:30,669 INFO L87 Difference]: Start difference. First operand 576 states and 765 transitions. Second operand has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:32,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 09:54:32,255 INFO L93 Difference]: Finished difference Result 1450 states and 2119 transitions. [2023-02-18 09:54:32,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-02-18 09:54:32,255 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2023-02-18 09:54:32,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 09:54:32,259 INFO L225 Difference]: With dead ends: 1450 [2023-02-18 09:54:32,260 INFO L226 Difference]: Without dead ends: 1152 [2023-02-18 09:54:32,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 480 SyntacticMatches, 46 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2023-02-18 09:54:32,263 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 1139 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1139 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-18 09:54:32,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1139 Valid, 270 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-18 09:54:32,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2023-02-18 09:54:32,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1152. [2023-02-18 09:54:32,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1148 states have (on average 1.3318815331010454) internal successors, (1529), 1148 states have internal predecessors, (1529), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-18 09:54:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1533 transitions. [2023-02-18 09:54:32,288 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1533 transitions. Word has length 287 [2023-02-18 09:54:32,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 09:54:32,288 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1533 transitions. [2023-02-18 09:54:32,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 4.505154639175258) internal successors, (437), 97 states have internal predecessors, (437), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 09:54:32,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1533 transitions. [2023-02-18 09:54:32,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 576 [2023-02-18 09:54:32,298 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 09:54:32,299 INFO L195 NwaCegarLoop]: trace histogram [94, 94, 94, 94, 94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 09:54:32,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-18 09:54:32,499 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 [2023-02-18 09:54:32,500 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 09:54:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 09:54:32,500 INFO L85 PathProgramCache]: Analyzing trace with hash -465307094, now seen corresponding path program 5 times [2023-02-18 09:54:32,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 09:54:32,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32160830] [2023-02-18 09:54:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 09:54:32,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 09:54:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 09:54:39,908 INFO L134 CoverageAnalysis]: Checked inductivity of 26414 backedges. 0 proven. 13207 refuted. 0 times theorem prover too weak. 13207 trivial. 0 not checked. [2023-02-18 09:54:39,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 09:54:39,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32160830] [2023-02-18 09:54:39,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32160830] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 09:54:39,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046236615] [2023-02-18 09:54:39,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 09:54:39,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 09:54:39,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 09:54:39,910 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) [2023-02-18 09:54:39,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process