./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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/data_structures_set_multi_proc_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 21:55:08,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 21:55:08,416 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 21:55:08,441 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 21:55:08,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 21:55:08,444 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 21:55:08,445 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 21:55:08,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 21:55:08,449 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 21:55:08,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 21:55:08,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 21:55:08,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 21:55:08,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 21:55:08,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 21:55:08,458 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 21:55:08,460 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 21:55:08,461 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 21:55:08,462 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 21:55:08,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 21:55:08,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 21:55:08,467 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 21:55:08,468 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 21:55:08,468 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 21:55:08,469 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 21:55:08,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 21:55:08,475 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 21:55:08,475 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 21:55:08,476 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 21:55:08,476 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 21:55:08,477 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 21:55:08,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 21:55:08,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 21:55:08,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 21:55:08,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 21:55:08,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 21:55:08,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 21:55:08,481 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 21:55:08,481 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 21:55:08,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 21:55:08,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 21:55:08,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 21:55:08,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 21:55:08,509 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 21:55:08,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 21:55:08,510 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 21:55:08,510 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 21:55:08,511 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 21:55:08,511 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 21:55:08,511 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 21:55:08,511 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 21:55:08,511 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 21:55:08,512 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 21:55:08,512 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 21:55:08,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 21:55:08,513 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 21:55:08,513 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 21:55:08,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 21:55:08,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 21:55:08,513 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 21:55:08,513 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 21:55:08,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 21:55:08,514 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 21:55:08,514 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 21:55:08,514 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 21:55:08,514 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 21:55:08,514 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 21:55:08,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:08,515 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 21:55:08,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 21:55:08,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 21:55:08,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 21:55:08,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 21:55:08,515 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 21:55:08,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 21:55:08,516 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 21:55:08,516 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 21:55:08,516 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 21:55:08,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 751e67420c89b9d0e6d5639ea75482b8ab104ec2c6d8190aacf202ff4b3b3104 [2023-02-13 21:55:08,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 21:55:08,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 21:55:08,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 21:55:08,780 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 21:55:08,780 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 21:55:08,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2023-02-13 21:55:09,731 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 21:55:09,894 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 21:55:09,894 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/data_structures_set_multi_proc_ground-2.i [2023-02-13 21:55:09,939 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25045a990/92f5e6e8291c476894df46ee85db3913/FLAG907e5c70e [2023-02-13 21:55:09,954 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/25045a990/92f5e6e8291c476894df46ee85db3913 [2023-02-13 21:55:09,955 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 21:55:09,956 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 21:55:09,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:09,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 21:55:09,961 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 21:55:09,961 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,962 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f37de0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09, skipping insertion in model container [2023-02-13 21:55:09,962 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 21:55:09,981 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 21:55:10,060 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/data_structures_set_multi_proc_ground-2.i[832,845] [2023-02-13 21:55:10,072 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:10,077 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 21:55:10,087 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/data_structures_set_multi_proc_ground-2.i[832,845] [2023-02-13 21:55:10,096 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:10,105 INFO L208 MainTranslator]: Completed translation [2023-02-13 21:55:10,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10 WrapperNode [2023-02-13 21:55:10,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:10,106 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:10,106 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 21:55:10,106 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 21:55:10,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,115 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,140 INFO L138 Inliner]: procedures = 18, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 137 [2023-02-13 21:55:10,140 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:10,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 21:55:10,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 21:55:10,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 21:55:10,147 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,156 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,156 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 21:55:10,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 21:55:10,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 21:55:10,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 21:55:10,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (1/1) ... [2023-02-13 21:55:10,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:10,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:10,206 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) [2023-02-13 21:55:10,212 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 [2023-02-13 21:55:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 21:55:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 21:55:10,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 21:55:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 21:55:10,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 21:55:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 21:55:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 21:55:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-13 21:55:10,234 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-13 21:55:10,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 21:55:10,306 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 21:55:10,309 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 21:55:10,452 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 21:55:10,457 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 21:55:10,457 INFO L300 CfgBuilder]: Removed 8 assume(true) statements. [2023-02-13 21:55:10,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10 BoogieIcfgContainer [2023-02-13 21:55:10,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 21:55:10,460 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 21:55:10,460 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 21:55:10,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 21:55:10,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 09:55:09" (1/3) ... [2023-02-13 21:55:10,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f96dae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:10" (2/3) ... [2023-02-13 21:55:10,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f96dae2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,464 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10" (3/3) ... [2023-02-13 21:55:10,465 INFO L112 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_ground-2.i [2023-02-13 21:55:10,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 21:55:10,477 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 21:55:10,522 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 21:55:10,545 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;@13aaadaa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 21:55:10,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 21:55:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 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) [2023-02-13 21:55:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-13 21:55:10,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,554 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,554 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:10,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:10,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1976888394, now seen corresponding path program 1 times [2023-02-13 21:55:10,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:10,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484542238] [2023-02-13 21:55:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:10,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:10,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:10,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484542238] [2023-02-13 21:55:10,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484542238] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:10,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:10,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 21:55:10,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614070101] [2023-02-13 21:55:10,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:10,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:10,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:10,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:10,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:10,808 INFO L87 Difference]: Start difference. First operand has 41 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 37 states have internal predecessors, (56), 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 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-13 21:55:10,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:10,896 INFO L93 Difference]: Finished difference Result 110 states and 169 transitions. [2023-02-13 21:55:10,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:10,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 10 [2023-02-13 21:55:10,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:10,906 INFO L225 Difference]: With dead ends: 110 [2023-02-13 21:55:10,906 INFO L226 Difference]: Without dead ends: 65 [2023-02-13 21:55:10,908 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 [2023-02-13 21:55:10,911 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:10,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 82 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-02-13 21:55:10,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2023-02-13 21:55:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 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) [2023-02-13 21:55:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-02-13 21:55:10,939 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 10 [2023-02-13 21:55:10,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:10,939 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-02-13 21:55:10,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-02-13 21:55:10,940 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-02-13 21:55:10,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-13 21:55:10,940 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 21:55:10,941 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:10,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:10,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1321690828, now seen corresponding path program 1 times [2023-02-13 21:55:10,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:10,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185509789] [2023-02-13 21:55:10,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,015 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:11,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185509789] [2023-02-13 21:55:11,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185509789] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:11,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530815909] [2023-02-13 21:55:11,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:11,024 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) [2023-02-13 21:55:11,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 21:55:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 21:55:11,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:11,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:11,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:11,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530815909] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:11,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:11,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 21:55:11,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405423557] [2023-02-13 21:55:11,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 21:55:11,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 21:55:11,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:11,117 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-13 21:55:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,204 INFO L93 Difference]: Finished difference Result 181 states and 243 transitions. [2023-02-13 21:55:11,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:11,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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 12 [2023-02-13 21:55:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,207 INFO L225 Difference]: With dead ends: 181 [2023-02-13 21:55:11,207 INFO L226 Difference]: Without dead ends: 148 [2023-02-13 21:55:11,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:11,208 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 145 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 202 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:11,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2023-02-13 21:55:11,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 44. [2023-02-13 21:55:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 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) [2023-02-13 21:55:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2023-02-13 21:55:11,217 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 12 [2023-02-13 21:55:11,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,218 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2023-02-13 21:55:11,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 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) [2023-02-13 21:55:11,218 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2023-02-13 21:55:11,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-13 21:55:11,218 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,219 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:11,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,423 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,424 INFO L85 PathProgramCache]: Analyzing trace with hash -202652846, now seen corresponding path program 2 times [2023-02-13 21:55:11,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254235537] [2023-02-13 21:55:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,573 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 21:55:11,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254235537] [2023-02-13 21:55:11,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254235537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,574 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:11,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821448651] [2023-02-13 21:55:11,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:11,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:11,576 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-13 21:55:11,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,595 INFO L93 Difference]: Finished difference Result 82 states and 103 transitions. [2023-02-13 21:55:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:11,596 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 18 [2023-02-13 21:55:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,597 INFO L225 Difference]: With dead ends: 82 [2023-02-13 21:55:11,597 INFO L226 Difference]: Without dead ends: 48 [2023-02-13 21:55:11,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:11,598 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 38 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 56 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-13 21:55:11,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-13 21:55:11,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:11,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2023-02-13 21:55:11,603 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 18 [2023-02-13 21:55:11,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,604 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2023-02-13 21:55:11,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-02-13 21:55:11,604 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2023-02-13 21:55:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-13 21:55:11,605 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,605 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-13 21:55:11,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1069304186, now seen corresponding path program 1 times [2023-02-13 21:55:11,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591960972] [2023-02-13 21:55:11,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:11,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591960972] [2023-02-13 21:55:11,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591960972] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:11,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:11,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 21:55:11,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057994261] [2023-02-13 21:55:11,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:11,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:11,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:11,662 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-02-13 21:55:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,678 INFO L93 Difference]: Finished difference Result 90 states and 112 transitions. [2023-02-13 21:55:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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 31 [2023-02-13 21:55:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,679 INFO L225 Difference]: With dead ends: 90 [2023-02-13 21:55:11,679 INFO L226 Difference]: Without dead ends: 59 [2023-02-13 21:55:11,680 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 [2023-02-13 21:55:11,681 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 63 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-13 21:55:11,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 48. [2023-02-13 21:55:11,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2023-02-13 21:55:11,686 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 31 [2023-02-13 21:55:11,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,686 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2023-02-13 21:55:11,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2023-02-13 21:55:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2023-02-13 21:55:11,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-13 21:55:11,687 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,688 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-13 21:55:11,688 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1327947132, now seen corresponding path program 1 times [2023-02-13 21:55:11,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162573747] [2023-02-13 21:55:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:11,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162573747] [2023-02-13 21:55:11,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162573747] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:11,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70330848] [2023-02-13 21:55:11,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:11,761 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) [2023-02-13 21:55:11,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 21:55:11,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 21:55:11,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:11,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:11,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:11,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70330848] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:11,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:11,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-13 21:55:11,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926011810] [2023-02-13 21:55:11,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 21:55:11,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 21:55:11,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-13 21:55:11,919 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2023-02-13 21:55:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,027 INFO L93 Difference]: Finished difference Result 187 states and 243 transitions. [2023-02-13 21:55:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-13 21:55:12,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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 33 [2023-02-13 21:55:12,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,029 INFO L225 Difference]: With dead ends: 187 [2023-02-13 21:55:12,029 INFO L226 Difference]: Without dead ends: 150 [2023-02-13 21:55:12,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2023-02-13 21:55:12,030 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 168 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 176 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-02-13 21:55:12,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 72. [2023-02-13 21:55:12,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 69 states have (on average 1.2028985507246377) internal successors, (83), 69 states have internal predecessors, (83), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:12,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2023-02-13 21:55:12,039 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 33 [2023-02-13 21:55:12,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,039 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2023-02-13 21:55:12,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 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) [2023-02-13 21:55:12,040 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2023-02-13 21:55:12,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-13 21:55:12,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,041 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:12,245 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 [2023-02-13 21:55:12,246 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1439765920, now seen corresponding path program 1 times [2023-02-13 21:55:12,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663419492] [2023-02-13 21:55:12,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2023-02-13 21:55:12,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663419492] [2023-02-13 21:55:12,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663419492] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:12,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:12,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-13 21:55:12,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854230015] [2023-02-13 21:55:12,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-13 21:55:12,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-13 21:55:12,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-13 21:55:12,354 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-13 21:55:12,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,369 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2023-02-13 21:55:12,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-13 21:55:12,370 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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 53 [2023-02-13 21:55:12,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,371 INFO L225 Difference]: With dead ends: 121 [2023-02-13 21:55:12,371 INFO L226 Difference]: Without dead ends: 91 [2023-02-13 21:55:12,371 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:12,372 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 12 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 132 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:12,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-13 21:55:12,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 75. [2023-02-13 21:55:12,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 72 states have internal predecessors, (86), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 88 transitions. [2023-02-13 21:55:12,379 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 88 transitions. Word has length 53 [2023-02-13 21:55:12,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,380 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 88 transitions. [2023-02-13 21:55:12,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 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) [2023-02-13 21:55:12,380 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 88 transitions. [2023-02-13 21:55:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-13 21:55:12,381 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,381 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-13 21:55:12,382 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1235733610, now seen corresponding path program 1 times [2023-02-13 21:55:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633417076] [2023-02-13 21:55:12,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:12,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633417076] [2023-02-13 21:55:12,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633417076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:12,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29752380] [2023-02-13 21:55:12,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:12,547 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) [2023-02-13 21:55:12,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 21:55:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 21:55:12,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:12,651 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:12,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:12,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29752380] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:12,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:12,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-13 21:55:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148120349] [2023-02-13 21:55:12,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-13 21:55:12,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-13 21:55:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:12,817 INFO L87 Difference]: Start difference. First operand 75 states and 88 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 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) [2023-02-13 21:55:13,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,006 INFO L93 Difference]: Finished difference Result 283 states and 364 transitions. [2023-02-13 21:55:13,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 21:55:13,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 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 53 [2023-02-13 21:55:13,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,007 INFO L225 Difference]: With dead ends: 283 [2023-02-13 21:55:13,007 INFO L226 Difference]: Without dead ends: 231 [2023-02-13 21:55:13,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:13,009 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 286 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 170 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:13,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2023-02-13 21:55:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 99. [2023-02-13 21:55:13,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 96 states have internal predecessors, (110), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:13,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 112 transitions. [2023-02-13 21:55:13,019 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 112 transitions. Word has length 53 [2023-02-13 21:55:13,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,019 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 112 transitions. [2023-02-13 21:55:13,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 25 states have internal predecessors, (72), 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) [2023-02-13 21:55:13,019 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 112 transitions. [2023-02-13 21:55:13,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-13 21:55:13,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,020 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:13,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,225 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1201823662, now seen corresponding path program 2 times [2023-02-13 21:55:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659585658] [2023-02-13 21:55:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,630 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:13,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659585658] [2023-02-13 21:55:13,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659585658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:13,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507516062] [2023-02-13 21:55:13,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:13,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:13,633 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) [2023-02-13 21:55:13,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 21:55:13,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:13,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:13,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-13 21:55:13,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:13,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:14,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507516062] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:14,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:14,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-13 21:55:14,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641116471] [2023-02-13 21:55:14,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:14,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-13 21:55:14,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:14,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-13 21:55:14,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-13 21:55:14,399 INFO L87 Difference]: Start difference. First operand 99 states and 112 transitions. Second operand has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 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) [2023-02-13 21:55:15,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:15,075 INFO L93 Difference]: Finished difference Result 475 states and 616 transitions. [2023-02-13 21:55:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-13 21:55:15,087 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 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 77 [2023-02-13 21:55:15,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:15,089 INFO L225 Difference]: With dead ends: 475 [2023-02-13 21:55:15,095 INFO L226 Difference]: Without dead ends: 423 [2023-02-13 21:55:15,096 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2023-02-13 21:55:15,096 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 565 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:15,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [611 Valid, 342 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 21:55:15,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-02-13 21:55:15,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 147. [2023-02-13 21:55:15,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 144 states have (on average 1.0972222222222223) internal successors, (158), 144 states have internal predecessors, (158), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:15,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 160 transitions. [2023-02-13 21:55:15,120 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 160 transitions. Word has length 77 [2023-02-13 21:55:15,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:15,121 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 160 transitions. [2023-02-13 21:55:15,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.4489795918367347) internal successors, (120), 49 states have internal predecessors, (120), 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) [2023-02-13 21:55:15,121 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 160 transitions. [2023-02-13 21:55:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-13 21:55:15,123 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:15,123 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:15,130 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:15,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:15,330 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:15,331 INFO L85 PathProgramCache]: Analyzing trace with hash -2102943710, now seen corresponding path program 3 times [2023-02-13 21:55:15,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:15,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038677462] [2023-02-13 21:55:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:15,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-13 21:55:16,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:16,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038677462] [2023-02-13 21:55:16,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038677462] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:16,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961539298] [2023-02-13 21:55:16,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:16,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:16,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:16,957 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) [2023-02-13 21:55:16,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 21:55:17,074 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 21:55:17,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:17,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-13 21:55:17,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2123 trivial. 0 not checked. [2023-02-13 21:55:17,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2127 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2123 trivial. 0 not checked. [2023-02-13 21:55:17,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961539298] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:17,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:17,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 5, 5] total 55 [2023-02-13 21:55:17,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264768446] [2023-02-13 21:55:17,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:17,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-13 21:55:17,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:17,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-13 21:55:17,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1203, Invalid=1767, Unknown=0, NotChecked=0, Total=2970 [2023-02-13 21:55:17,206 INFO L87 Difference]: Start difference. First operand 147 states and 160 transitions. Second operand has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 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) [2023-02-13 21:55:17,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:17,723 INFO L93 Difference]: Finished difference Result 566 states and 718 transitions. [2023-02-13 21:55:17,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-13 21:55:17,723 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 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 125 [2023-02-13 21:55:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:17,725 INFO L225 Difference]: With dead ends: 566 [2023-02-13 21:55:17,725 INFO L226 Difference]: Without dead ends: 514 [2023-02-13 21:55:17,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1533, Invalid=2127, Unknown=0, NotChecked=0, Total=3660 [2023-02-13 21:55:17,727 INFO L413 NwaCegarLoop]: 75 mSDtfsCounter, 1091 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:17,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 457 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 21:55:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2023-02-13 21:55:17,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 229. [2023-02-13 21:55:17,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 226 states have (on average 1.168141592920354) internal successors, (264), 226 states have internal predecessors, (264), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:17,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 266 transitions. [2023-02-13 21:55:17,740 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 266 transitions. Word has length 125 [2023-02-13 21:55:17,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:17,740 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 266 transitions. [2023-02-13 21:55:17,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.4909090909090907) internal successors, (137), 55 states have internal predecessors, (137), 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) [2023-02-13 21:55:17,741 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 266 transitions. [2023-02-13 21:55:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-02-13 21:55:17,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:17,742 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:17,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:17,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:17,952 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1761277144, now seen corresponding path program 4 times [2023-02-13 21:55:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:17,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992690352] [2023-02-13 21:55:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-13 21:55:19,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992690352] [2023-02-13 21:55:19,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992690352] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112659108] [2023-02-13 21:55:19,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:55:19,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:19,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:19,621 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) [2023-02-13 21:55:19,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 21:55:19,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:55:19,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:19,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-13 21:55:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:19,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-13 21:55:19,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2336 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-13 21:55:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112659108] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:22,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:22,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-02-13 21:55:22,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498022190] [2023-02-13 21:55:22,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-02-13 21:55:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-02-13 21:55:22,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-02-13 21:55:22,014 INFO L87 Difference]: Start difference. First operand 229 states and 266 transitions. Second operand has 99 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 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) [2023-02-13 21:55:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:23,706 INFO L93 Difference]: Finished difference Result 1035 states and 1349 transitions. [2023-02-13 21:55:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-13 21:55:23,707 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 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 159 [2023-02-13 21:55:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:23,710 INFO L225 Difference]: With dead ends: 1035 [2023-02-13 21:55:23,710 INFO L226 Difference]: Without dead ends: 903 [2023-02-13 21:55:23,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2023-02-13 21:55:23,713 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 1510 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1606 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 624 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:23,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1606 Valid, 576 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [624 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-13 21:55:23,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2023-02-13 21:55:23,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 327. [2023-02-13 21:55:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 324 states have (on average 1.117283950617284) internal successors, (362), 324 states have internal predecessors, (362), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-13 21:55:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 364 transitions. [2023-02-13 21:55:23,734 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 364 transitions. Word has length 159 [2023-02-13 21:55:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:23,734 INFO L495 AbstractCegarLoop]: Abstraction has 327 states and 364 transitions. [2023-02-13 21:55:23,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.2222222222222223) internal successors, (220), 99 states have internal predecessors, (220), 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) [2023-02-13 21:55:23,735 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 364 transitions. [2023-02-13 21:55:23,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-02-13 21:55:23,736 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:23,736 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:23,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:23,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:23,942 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:23,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:23,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1416641146, now seen corresponding path program 5 times [2023-02-13 21:55:23,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:23,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304377621] [2023-02-13 21:55:23,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:23,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:28,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9343 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-02-13 21:55:28,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:28,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304377621] [2023-02-13 21:55:28,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304377621] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817970965] [2023-02-13 21:55:28,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 21:55:28,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:28,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:28,368 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:28,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process