./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e6ceef81d5d5c6ec4b435ae3bf6300a70928e11f3a8c1d376463323495e50f12 --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 20:17:35,349 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 20:17:35,351 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 20:17:35,375 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 20:17:35,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 20:17:35,378 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 20:17:35,380 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 20:17:35,382 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 20:17:35,384 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 20:17:35,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 20:17:35,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 20:17:35,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 20:17:35,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 20:17:35,394 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 20:17:35,396 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 20:17:35,397 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 20:17:35,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 20:17:35,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 20:17:35,400 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 20:17:35,404 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 20:17:35,405 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 20:17:35,406 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 20:17:35,407 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 20:17:35,407 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 20:17:35,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 20:17:35,415 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 20:17:35,415 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 20:17:35,416 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 20:17:35,416 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 20:17:35,417 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 20:17:35,418 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 20:17:35,418 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 20:17:35,419 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 20:17:35,420 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 20:17:35,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 20:17:35,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 20:17:35,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 20:17:35,422 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 20:17:35,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 20:17:35,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 20:17:35,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 20:17:35,425 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 20:17:35,454 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 20:17:35,454 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 20:17:35,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 20:17:35,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 20:17:35,455 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 20:17:35,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 20:17:35,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 20:17:35,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 20:17:35,456 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 20:17:35,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 20:17:35,457 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 20:17:35,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 20:17:35,458 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 20:17:35,458 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 20:17:35,458 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 20:17:35,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 20:17:35,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 20:17:35,458 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 20:17:35,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 20:17:35,459 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 20:17:35,459 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 20:17:35,459 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 20:17:35,459 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 20:17:35,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 20:17:35,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:17:35,460 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 20:17:35,460 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 20:17:35,460 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 20:17:35,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 20:17:35,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 20:17:35,461 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 20:17:35,461 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 20:17:35,461 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 20:17:35,461 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 20:17:35,461 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 20:17:35,462 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6ceef81d5d5c6ec4b435ae3bf6300a70928e11f3a8c1d376463323495e50f12 [2023-02-15 20:17:35,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 20:17:35,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 20:17:35,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 20:17:35,650 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 20:17:35,651 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 20:17:35,651 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2023-02-15 20:17:36,765 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 20:17:36,920 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 20:17:36,921 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c [2023-02-15 20:17:36,926 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbcb4daa/4b4129fe95a94b76bba9b1cf581ed315/FLAG1180b4c00 [2023-02-15 20:17:36,942 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3dbcb4daa/4b4129fe95a94b76bba9b1cf581ed315 [2023-02-15 20:17:36,943 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 20:17:36,944 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 20:17:36,947 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 20:17:36,947 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 20:17:36,949 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 20:17:36,950 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:17:36" (1/1) ... [2023-02-15 20:17:36,951 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14d3737b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:36, skipping insertion in model container [2023-02-15 20:17:36,951 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 08:17:36" (1/1) ... [2023-02-15 20:17:36,957 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 20:17:36,967 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 20:17:37,062 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[557,570] [2023-02-15 20:17:37,066 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[613,626] [2023-02-15 20:17:37,068 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:17:37,078 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 20:17:37,090 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[557,570] [2023-02-15 20:17:37,091 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-invariants/linear-inequality-inv-a.c[613,626] [2023-02-15 20:17:37,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 20:17:37,102 INFO L208 MainTranslator]: Completed translation [2023-02-15 20:17:37,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37 WrapperNode [2023-02-15 20:17:37,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 20:17:37,103 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 20:17:37,103 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 20:17:37,103 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 20:17:37,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,113 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,124 INFO L138 Inliner]: procedures = 11, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2023-02-15 20:17:37,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 20:17:37,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 20:17:37,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 20:17:37,125 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 20:17:37,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,132 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,133 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,136 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,136 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 20:17:37,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 20:17:37,139 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 20:17:37,139 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 20:17:37,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (1/1) ... [2023-02-15 20:17:37,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 20:17:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:37,167 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) [2023-02-15 20:17:37,177 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 [2023-02-15 20:17:37,197 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 20:17:37,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 20:17:37,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 20:17:37,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 20:17:37,237 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 20:17:37,238 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 20:17:37,312 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 20:17:37,316 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 20:17:37,316 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-15 20:17:37,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:17:37 BoogieIcfgContainer [2023-02-15 20:17:37,318 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 20:17:37,319 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 20:17:37,319 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 20:17:37,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 20:17:37,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 08:17:36" (1/3) ... [2023-02-15 20:17:37,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19703fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:17:37, skipping insertion in model container [2023-02-15 20:17:37,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 08:17:37" (2/3) ... [2023-02-15 20:17:37,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19703fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 08:17:37, skipping insertion in model container [2023-02-15 20:17:37,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 08:17:37" (3/3) ... [2023-02-15 20:17:37,323 INFO L112 eAbstractionObserver]: Analyzing ICFG linear-inequality-inv-a.c [2023-02-15 20:17:37,335 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 20:17:37,335 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-02-15 20:17:37,364 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 20:17:37,369 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;@62894e1e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 20:17:37,369 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-02-15 20:17:37,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 20:17:37,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:37,376 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 20:17:37,377 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:37,381 INFO L85 PathProgramCache]: Analyzing trace with hash 889577263, now seen corresponding path program 1 times [2023-02-15 20:17:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:37,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353943545] [2023-02-15 20:17:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:37,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:37,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:37,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:37,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:37,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353943545] [2023-02-15 20:17:37,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353943545] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:37,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:17:37,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 20:17:37,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83437175] [2023-02-15 20:17:37,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:37,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 20:17:37,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:37,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 20:17:37,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:17:37,540 INFO L87 Difference]: Start difference. First operand has 13 states, 10 states have (on average 1.7) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:37,552 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2023-02-15 20:17:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 20:17:37,555 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 20:17:37,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:37,560 INFO L225 Difference]: With dead ends: 22 [2023-02-15 20:17:37,560 INFO L226 Difference]: Without dead ends: 10 [2023-02-15 20:17:37,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 20:17:37,566 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:37,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-15 20:17:37,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-15 20:17:37,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:37,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-02-15 20:17:37,593 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 6 [2023-02-15 20:17:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:37,594 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-02-15 20:17:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-02-15 20:17:37,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-15 20:17:37,595 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:37,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-15 20:17:37,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 20:17:37,599 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:37,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:37,600 INFO L85 PathProgramCache]: Analyzing trace with hash 889573419, now seen corresponding path program 1 times [2023-02-15 20:17:37,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:37,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297518565] [2023-02-15 20:17:37,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:37,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:37,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:37,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:37,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297518565] [2023-02-15 20:17:37,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297518565] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 20:17:37,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 20:17:37,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 20:17:37,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052058400] [2023-02-15 20:17:37,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 20:17:37,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 20:17:37,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:37,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 20:17:37,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 20:17:37,806 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:37,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:37,815 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2023-02-15 20:17:37,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 20:17:37,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-15 20:17:37,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:37,816 INFO L225 Difference]: With dead ends: 17 [2023-02-15 20:17:37,816 INFO L226 Difference]: Without dead ends: 11 [2023-02-15 20:17:37,816 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 [2023-02-15 20:17:37,817 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:37,818 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-15 20:17:37,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-15 20:17:37,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:37,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-02-15 20:17:37,827 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 6 [2023-02-15 20:17:37,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:37,827 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-02-15 20:17:37,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:37,828 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-02-15 20:17:37,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 20:17:37,828 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:37,828 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:37,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 20:17:37,829 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:37,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:37,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1807024099, now seen corresponding path program 1 times [2023-02-15 20:17:37,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:37,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001165] [2023-02-15 20:17:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:37,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:37,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:37,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:37,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001165] [2023-02-15 20:17:37,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001165] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:37,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625014314] [2023-02-15 20:17:37,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:37,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:37,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:38,027 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) [2023-02-15 20:17:38,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 20:17:38,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:38,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-15 20:17:38,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:38,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:38,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [625014314] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:38,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:38,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 20:17:38,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898058979] [2023-02-15 20:17:38,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:38,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 20:17:38,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:38,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 20:17:38,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-02-15 20:17:38,183 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:38,242 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-15 20:17:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:17:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-02-15 20:17:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:38,243 INFO L225 Difference]: With dead ends: 28 [2023-02-15 20:17:38,244 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 20:17:38,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-02-15 20:17:38,245 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 20 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:38,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:38,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 20:17:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2023-02-15 20:17:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2023-02-15 20:17:38,250 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 7 [2023-02-15 20:17:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:38,250 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2023-02-15 20:17:38,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2023-02-15 20:17:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 20:17:38,251 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:38,251 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:38,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:38,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:38,457 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:38,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1384984081, now seen corresponding path program 1 times [2023-02-15 20:17:38,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:38,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368226356] [2023-02-15 20:17:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:38,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:38,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368226356] [2023-02-15 20:17:38,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368226356] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:38,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481998426] [2023-02-15 20:17:38,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:38,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:38,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:38,567 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) [2023-02-15 20:17:38,585 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 20:17:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:38,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-15 20:17:38,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:38,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:38,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:38,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481998426] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:38,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:38,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-15 20:17:38,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430660524] [2023-02-15 20:17:38,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:38,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-15 20:17:38,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:38,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-15 20:17:38,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:17:38,727 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:38,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:38,768 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-02-15 20:17:38,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 20:17:38,768 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 20:17:38,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:38,769 INFO L225 Difference]: With dead ends: 26 [2023-02-15 20:17:38,769 INFO L226 Difference]: Without dead ends: 18 [2023-02-15 20:17:38,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2023-02-15 20:17:38,770 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 8 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:38,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 17 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 20:17:38,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-15 20:17:38,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-02-15 20:17:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-02-15 20:17:38,775 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 9 [2023-02-15 20:17:38,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:38,776 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-02-15 20:17:38,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:38,776 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-02-15 20:17:38,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 20:17:38,776 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:38,777 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:38,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:38,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 20:17:38,982 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:38,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:38,983 INFO L85 PathProgramCache]: Analyzing trace with hash -13631957, now seen corresponding path program 2 times [2023-02-15 20:17:38,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:38,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495810004] [2023-02-15 20:17:38,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:38,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:38,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:39,211 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:39,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:39,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495810004] [2023-02-15 20:17:39,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495810004] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:39,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817236275] [2023-02-15 20:17:39,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:17:39,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:39,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:39,224 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) [2023-02-15 20:17:39,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 20:17:39,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:17:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:39,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-15 20:17:39,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:39,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:39,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817236275] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:39,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:39,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 20:17:39,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516951990] [2023-02-15 20:17:39,532 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:39,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 20:17:39,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:39,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 20:17:39,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2023-02-15 20:17:39,535 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:39,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:39,718 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2023-02-15 20:17:39,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 20:17:39,719 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-02-15 20:17:39,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:39,719 INFO L225 Difference]: With dead ends: 40 [2023-02-15 20:17:39,719 INFO L226 Difference]: Without dead ends: 36 [2023-02-15 20:17:39,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2023-02-15 20:17:39,720 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 42 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:39,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:17:39,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-15 20:17:39,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2023-02-15 20:17:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:39,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2023-02-15 20:17:39,729 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 10 [2023-02-15 20:17:39,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:39,730 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2023-02-15 20:17:39,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:39,730 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2023-02-15 20:17:39,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 20:17:39,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:39,731 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:39,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:39,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:39,937 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:39,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:39,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1963737105, now seen corresponding path program 2 times [2023-02-15 20:17:39,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:39,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718555818] [2023-02-15 20:17:39,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:39,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:40,085 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:40,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:40,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718555818] [2023-02-15 20:17:40,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718555818] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:40,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007103413] [2023-02-15 20:17:40,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 20:17:40,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:40,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:40,089 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) [2023-02-15 20:17:40,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 20:17:40,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 20:17:40,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:40,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-15 20:17:40,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:40,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:40,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007103413] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:40,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:40,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-15 20:17:40,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220758393] [2023-02-15 20:17:40,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:40,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-15 20:17:40,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:40,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-15 20:17:40,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:17:40,325 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:40,444 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2023-02-15 20:17:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 20:17:40,445 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-15 20:17:40,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:40,446 INFO L225 Difference]: With dead ends: 42 [2023-02-15 20:17:40,446 INFO L226 Difference]: Without dead ends: 28 [2023-02-15 20:17:40,446 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2023-02-15 20:17:40,447 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:40,447 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 28 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:17:40,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-15 20:17:40,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2023-02-15 20:17:40,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-02-15 20:17:40,455 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 13 [2023-02-15 20:17:40,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:40,455 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-02-15 20:17:40,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.4375) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:40,455 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-02-15 20:17:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 20:17:40,455 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:40,455 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:40,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:40,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:40,657 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:40,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1418863403, now seen corresponding path program 3 times [2023-02-15 20:17:40,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:40,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114226457] [2023-02-15 20:17:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:40,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:41,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114226457] [2023-02-15 20:17:41,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114226457] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:41,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249271345] [2023-02-15 20:17:41,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:17:41,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:41,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:41,077 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) [2023-02-15 20:17:41,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 20:17:41,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-15 20:17:41,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:41,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-15 20:17:41,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:41,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:41,609 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:41,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249271345] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:41,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:41,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 20:17:41,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613440233] [2023-02-15 20:17:41,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:41,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 20:17:41,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:41,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 20:17:41,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=350, Unknown=0, NotChecked=0, Total=600 [2023-02-15 20:17:41,611 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:42,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:42,065 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-02-15 20:17:42,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-15 20:17:42,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-15 20:17:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:42,066 INFO L225 Difference]: With dead ends: 70 [2023-02-15 20:17:42,066 INFO L226 Difference]: Without dead ends: 64 [2023-02-15 20:17:42,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=750, Invalid=1230, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 20:17:42,068 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 110 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:42,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 41 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 20:17:42,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-15 20:17:42,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 33. [2023-02-15 20:17:42,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 32 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:42,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-15 20:17:42,076 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 16 [2023-02-15 20:17:42,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:42,076 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-15 20:17:42,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.28) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-15 20:17:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 20:17:42,077 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:42,077 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:42,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:42,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:42,284 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:42,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1090479121, now seen corresponding path program 3 times [2023-02-15 20:17:42,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:42,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107390533] [2023-02-15 20:17:42,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:42,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:42,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:42,800 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:42,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:42,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107390533] [2023-02-15 20:17:42,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107390533] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:42,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109773423] [2023-02-15 20:17:42,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 20:17:42,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:42,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:42,802 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) [2023-02-15 20:17:42,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 20:17:42,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 20:17:42,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:42,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 31 conjunts are in the unsatisfiable core [2023-02-15 20:17:42,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:43,015 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:43,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:43,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109773423] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:43,532 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:43,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2023-02-15 20:17:43,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177483323] [2023-02-15 20:17:43,533 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:43,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-15 20:17:43,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:43,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-15 20:17:43,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:17:43,534 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:43,769 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2023-02-15 20:17:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 20:17:43,769 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-15 20:17:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:43,770 INFO L225 Difference]: With dead ends: 74 [2023-02-15 20:17:43,770 INFO L226 Difference]: Without dead ends: 48 [2023-02-15 20:17:43,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2023-02-15 20:17:43,771 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:43,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 34 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 20:17:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-15 20:17:43,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2023-02-15 20:17:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 40 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:43,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2023-02-15 20:17:43,779 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 21 [2023-02-15 20:17:43,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:43,780 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2023-02-15 20:17:43,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:43,780 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2023-02-15 20:17:43,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 20:17:43,780 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:43,780 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:43,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-15 20:17:43,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:43,986 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash 559361323, now seen corresponding path program 4 times [2023-02-15 20:17:43,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:43,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901301657] [2023-02-15 20:17:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:43,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:44,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:44,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:44,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901301657] [2023-02-15 20:17:44,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901301657] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:44,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200659204] [2023-02-15 20:17:44,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:17:44,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:44,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:44,741 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) [2023-02-15 20:17:44,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 20:17:44,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:17:44,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:44,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-15 20:17:44,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:45,043 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:45,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:46,037 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:46,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200659204] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:46,038 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:46,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-15 20:17:46,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755506401] [2023-02-15 20:17:46,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:46,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-15 20:17:46,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:46,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-15 20:17:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1066, Invalid=1286, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 20:17:46,040 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:47,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:47,602 INFO L93 Difference]: Finished difference Result 130 states and 153 transitions. [2023-02-15 20:17:47,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 20:17:47,602 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-15 20:17:47,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:47,603 INFO L225 Difference]: With dead ends: 130 [2023-02-15 20:17:47,603 INFO L226 Difference]: Without dead ends: 120 [2023-02-15 20:17:47,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3222, Invalid=5334, Unknown=0, NotChecked=0, Total=8556 [2023-02-15 20:17:47,606 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 215 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:47,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 71 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 20:17:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-15 20:17:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 57. [2023-02-15 20:17:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 56 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2023-02-15 20:17:47,622 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 28 [2023-02-15 20:17:47,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:47,622 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2023-02-15 20:17:47,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2023-02-15 20:17:47,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 20:17:47,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:47,623 INFO L195 NwaCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:47,631 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 20:17:47,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:47,829 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:47,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:47,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1924770833, now seen corresponding path program 4 times [2023-02-15 20:17:47,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:47,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165962483] [2023-02-15 20:17:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:47,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:49,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165962483] [2023-02-15 20:17:49,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165962483] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:49,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979529264] [2023-02-15 20:17:49,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 20:17:49,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:49,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:49,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:49,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 20:17:49,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 20:17:49,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 20:17:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 63 conjunts are in the unsatisfiable core [2023-02-15 20:17:49,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 20:17:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:49,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 20:17:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:51,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979529264] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 20:17:51,298 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 20:17:51,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2023-02-15 20:17:51,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172799480] [2023-02-15 20:17:51,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 20:17:51,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-15 20:17:51,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 20:17:51,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-15 20:17:51,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 20:17:51,304 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 64 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:52,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 20:17:52,172 INFO L93 Difference]: Finished difference Result 138 states and 185 transitions. [2023-02-15 20:17:52,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-15 20:17:52,174 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 20:17:52,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 20:17:52,175 INFO L225 Difference]: With dead ends: 138 [2023-02-15 20:17:52,175 INFO L226 Difference]: Without dead ends: 88 [2023-02-15 20:17:52,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 20:17:52,176 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 189 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 20:17:52,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 66 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 20:17:52,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-15 20:17:52,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 73. [2023-02-15 20:17:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.2535211267605635) internal successors, (89), 72 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:52,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2023-02-15 20:17:52,200 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 37 [2023-02-15 20:17:52,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 20:17:52,200 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2023-02-15 20:17:52,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.109375) internal successors, (71), 64 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 20:17:52,207 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2023-02-15 20:17:52,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 20:17:52,210 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 20:17:52,210 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-02-15 20:17:52,223 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-15 20:17:52,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 20:17:52,416 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 20:17:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 20:17:52,417 INFO L85 PathProgramCache]: Analyzing trace with hash -39567061, now seen corresponding path program 5 times [2023-02-15 20:17:52,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 20:17:52,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609711790] [2023-02-15 20:17:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 20:17:52,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 20:17:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 20:17:55,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 20:17:55,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 20:17:55,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609711790] [2023-02-15 20:17:55,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609711790] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 20:17:55,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011175373] [2023-02-15 20:17:55,064 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 20:17:55,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 20:17:55,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 20:17:55,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 20:17:55,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process