./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/phases_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-acceleration/phases_1-2.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 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 23:52:20,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 23:52:20,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 23:52:20,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 23:52:20,724 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 23:52:20,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 23:52:20,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 23:52:20,729 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 23:52:20,730 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 23:52:20,734 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 23:52:20,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 23:52:20,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 23:52:20,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 23:52:20,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 23:52:20,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 23:52:20,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 23:52:20,741 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 23:52:20,742 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 23:52:20,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 23:52:20,746 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 23:52:20,747 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 23:52:20,748 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 23:52:20,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 23:52:20,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 23:52:20,756 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 23:52:20,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 23:52:20,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 23:52:20,757 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 23:52:20,758 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 23:52:20,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 23:52:20,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 23:52:20,759 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 23:52:20,760 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 23:52:20,761 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 23:52:20,762 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 23:52:20,762 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 23:52:20,762 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 23:52:20,762 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 23:52:20,763 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 23:52:20,764 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 23:52:20,765 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 23:52:20,765 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 23:52:20,792 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 23:52:20,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 23:52:20,793 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 23:52:20,793 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 23:52:20,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 23:52:20,794 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 23:52:20,794 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 23:52:20,794 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 23:52:20,795 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 23:52:20,795 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 23:52:20,795 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 23:52:20,796 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 23:52:20,796 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 23:52:20,796 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 23:52:20,796 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 23:52:20,796 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 23:52:20,796 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 23:52:20,797 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 23:52:20,797 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 23:52:20,797 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 23:52:20,797 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 23:52:20,797 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 23:52:20,797 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 23:52:20,797 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 23:52:20,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:52:20,798 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 23:52:20,798 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 23:52:20,798 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 23:52:20,798 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 23:52:20,798 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 23:52:20,798 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 23:52:20,799 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 23:52:20,799 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 23:52:20,799 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 23:52:20,799 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 23:52:20,799 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f868671c12bae02e06798527bc7c1ed7b8332d3fee83b3ff24f9cd503da0a60 [2023-02-13 23:52:21,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 23:52:21,034 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 23:52:21,036 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 23:52:21,037 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 23:52:21,037 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 23:52:21,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2023-02-13 23:52:22,012 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 23:52:22,149 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 23:52:22,150 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2023-02-13 23:52:22,153 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8536ede09/8aaad5eb4296420189f92a004e1bf8d2/FLAG72eb97cdb [2023-02-13 23:52:22,161 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8536ede09/8aaad5eb4296420189f92a004e1bf8d2 [2023-02-13 23:52:22,163 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 23:52:22,164 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 23:52:22,165 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 23:52:22,165 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 23:52:22,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 23:52:22,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@363cfec0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22, skipping insertion in model container [2023-02-13 23:52:22,169 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,173 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 23:52:22,181 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 23:52:22,267 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-acceleration/phases_1-2.c[322,335] [2023-02-13 23:52:22,276 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:52:22,283 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 23:52:22,290 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-acceleration/phases_1-2.c[322,335] [2023-02-13 23:52:22,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 23:52:22,301 INFO L208 MainTranslator]: Completed translation [2023-02-13 23:52:22,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22 WrapperNode [2023-02-13 23:52:22,302 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 23:52:22,303 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 23:52:22,303 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 23:52:22,303 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 23:52:22,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,322 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 27 [2023-02-13 23:52:22,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 23:52:22,323 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 23:52:22,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 23:52:22,324 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 23:52:22,329 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,329 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,330 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,330 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,332 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,334 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,334 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,335 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,336 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 23:52:22,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 23:52:22,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 23:52:22,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 23:52:22,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (1/1) ... [2023-02-13 23:52:22,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 23:52:22,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:52:22,361 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-13 23:52:22,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-13 23:52:22,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 23:52:22,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 23:52:22,387 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 23:52:22,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 23:52:22,431 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 23:52:22,433 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 23:52:22,548 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 23:52:22,561 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 23:52:22,561 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-13 23:52:22,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:52:22 BoogieIcfgContainer [2023-02-13 23:52:22,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 23:52:22,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 23:52:22,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 23:52:22,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 23:52:22,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 11:52:22" (1/3) ... [2023-02-13 23:52:22,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b07196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:52:22, skipping insertion in model container [2023-02-13 23:52:22,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 11:52:22" (2/3) ... [2023-02-13 23:52:22,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66b07196 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 11:52:22, skipping insertion in model container [2023-02-13 23:52:22,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 11:52:22" (3/3) ... [2023-02-13 23:52:22,595 INFO L112 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2023-02-13 23:52:22,624 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 23:52:22,624 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 23:52:22,655 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 23:52:22,659 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;@7d14094e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 23:52:22,660 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 23:52:22,662 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2023-02-13 23:52:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-13 23:52:22,666 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:22,667 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-13 23:52:22,667 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:22,672 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2023-02-13 23:52:22,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:22,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597461121] [2023-02-13 23:52:22,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:22,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:22,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:22,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:22,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597461121] [2023-02-13 23:52:22,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597461121] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:52:22,778 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:52:22,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 23:52:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865057911] [2023-02-13 23:52:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:52:22,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 23:52:22,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:52:22,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 23:52:22,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 23:52:22,810 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) 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) [2023-02-13 23:52:22,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:52:22,821 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2023-02-13 23:52:22,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 23:52:22,823 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 [2023-02-13 23:52:22,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:52:22,834 INFO L225 Difference]: With dead ends: 20 [2023-02-13 23:52:22,834 INFO L226 Difference]: Without dead ends: 8 [2023-02-13 23:52:22,836 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 [2023-02-13 23:52:22,840 INFO L413 NwaCegarLoop]: 13 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, 13 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 [2023-02-13 23:52:22,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:52:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-02-13 23:52:22,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-02-13 23:52:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:22,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2023-02-13 23:52:22,862 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2023-02-13 23:52:22,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:52:22,862 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2023-02-13 23:52:22,862 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) [2023-02-13 23:52:22,863 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2023-02-13 23:52:22,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-13 23:52:22,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:22,863 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-13 23:52:22,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 23:52:22,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:22,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:22,865 INFO L85 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2023-02-13 23:52:22,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:22,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139087099] [2023-02-13 23:52:22,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:22,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:22,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:22,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:22,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139087099] [2023-02-13 23:52:22,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139087099] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 23:52:22,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 23:52:22,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 23:52:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185160099] [2023-02-13 23:52:22,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 23:52:22,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 23:52:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:52:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 23:52:22,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:52:22,994 INFO L87 Difference]: Start difference. First operand 8 states and 9 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) [2023-02-13 23:52:23,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:52:23,007 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2023-02-13 23:52:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 23:52:23,007 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 [2023-02-13 23:52:23,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:52:23,007 INFO L225 Difference]: With dead ends: 16 [2023-02-13 23:52:23,007 INFO L226 Difference]: Without dead ends: 10 [2023-02-13 23:52:23,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 23:52:23,009 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:52:23,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 10 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:52:23,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-13 23:52:23,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-13 23:52:23,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:23,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-13 23:52:23,012 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2023-02-13 23:52:23,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:52:23,012 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-13 23:52:23,012 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) [2023-02-13 23:52:23,012 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-13 23:52:23,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-13 23:52:23,012 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:23,012 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:52:23,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 23:52:23,013 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:23,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash 295691924, now seen corresponding path program 1 times [2023-02-13 23:52:23,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:23,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666048842] [2023-02-13 23:52:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:23,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:23,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666048842] [2023-02-13 23:52:23,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666048842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:52:23,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9591251] [2023-02-13 23:52:23,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:23,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:52:23,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:52:23,143 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:52:23,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 23:52:23,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:23,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-13 23:52:23,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:52:23,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:23,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:52:23,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:23,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9591251] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:52:23,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:52:23,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 23:52:23,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017928081] [2023-02-13 23:52:23,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:52:23,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 23:52:23,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:52:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 23:52:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-02-13 23:52:23,246 INFO L87 Difference]: Start difference. First operand 10 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) [2023-02-13 23:52:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:52:23,289 INFO L93 Difference]: Finished difference Result 20 states and 26 transitions. [2023-02-13 23:52:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 23:52:23,290 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 8 [2023-02-13 23:52:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:52:23,291 INFO L225 Difference]: With dead ends: 20 [2023-02-13 23:52:23,291 INFO L226 Difference]: Without dead ends: 14 [2023-02-13 23:52:23,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-02-13 23:52:23,294 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 23:52:23,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 21 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 23:52:23,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-02-13 23:52:23,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-02-13 23:52:23,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2023-02-13 23:52:23,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-13 23:52:23,308 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 8 [2023-02-13 23:52:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:52:23,309 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-13 23:52:23,309 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) [2023-02-13 23:52:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-13 23:52:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-13 23:52:23,309 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:23,309 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 23:52:23,316 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 23:52:23,513 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 [2023-02-13 23:52:23,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash 572634524, now seen corresponding path program 1 times [2023-02-13 23:52:23,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:23,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911429833] [2023-02-13 23:52:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:23,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:23,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:23,663 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:23,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911429833] [2023-02-13 23:52:23,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911429833] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:52:23,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417289881] [2023-02-13 23:52:23,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:23,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:52:23,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:52:23,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:52:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-13 23:52:23,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:52:23,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 23:52:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:23,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:52:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:23,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417289881] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:52:23,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:52:23,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 11 [2023-02-13 23:52:23,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353398896] [2023-02-13 23:52:23,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:52:23,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 23:52:23,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:52:23,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 23:52:23,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2023-02-13 23:52:23,796 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:52:23,958 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-02-13 23:52:23,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 23:52:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-13 23:52:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:52:23,960 INFO L225 Difference]: With dead ends: 26 [2023-02-13 23:52:23,960 INFO L226 Difference]: Without dead ends: 19 [2023-02-13 23:52:23,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2023-02-13 23:52:23,961 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:52:23,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 30 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:52:23,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-13 23:52:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-02-13 23:52:23,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:23,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-02-13 23:52:23,965 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2023-02-13 23:52:23,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:52:23,965 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-02-13 23:52:23,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:23,966 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-02-13 23:52:23,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-02-13 23:52:23,966 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:23,966 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1] [2023-02-13 23:52:23,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 23:52:24,170 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 [2023-02-13 23:52:24,170 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash -549258615, now seen corresponding path program 2 times [2023-02-13 23:52:24,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:24,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663194439] [2023-02-13 23:52:24,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-13 23:52:24,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:24,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663194439] [2023-02-13 23:52:24,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663194439] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:52:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544031677] [2023-02-13 23:52:24,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 23:52:24,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:52:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:52:24,279 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:52:24,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 23:52:24,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 23:52:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:52:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-13 23:52:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:52:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:24,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:52:24,512 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:52:24,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544031677] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:52:24,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:52:24,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 17 [2023-02-13 23:52:24,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532328925] [2023-02-13 23:52:24,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:52:24,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-13 23:52:24,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:52:24,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-13 23:52:24,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2023-02-13 23:52:24,517 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:24,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:52:24,876 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2023-02-13 23:52:24,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-13 23:52:24,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-02-13 23:52:24,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:52:24,877 INFO L225 Difference]: With dead ends: 36 [2023-02-13 23:52:24,877 INFO L226 Difference]: Without dead ends: 25 [2023-02-13 23:52:24,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2023-02-13 23:52:24,878 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:52:24,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:52:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-13 23:52:24,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-13 23:52:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:24,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-13 23:52:24,882 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 18 [2023-02-13 23:52:24,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:52:24,882 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-13 23:52:24,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:24,882 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-13 23:52:24,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-13 23:52:24,883 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:24,883 INFO L195 NwaCegarLoop]: trace histogram [9, 5, 4, 1, 1, 1, 1, 1, 1] [2023-02-13 23:52:24,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 23:52:25,087 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 [2023-02-13 23:52:25,088 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash 379103926, now seen corresponding path program 3 times [2023-02-13 23:52:25,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:25,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333099284] [2023-02-13 23:52:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:25,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:25,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:25,183 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 23:52:25,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:25,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333099284] [2023-02-13 23:52:25,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333099284] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:52:25,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610987740] [2023-02-13 23:52:25,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 23:52:25,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:52:25,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:52:25,185 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:52:25,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 23:52:25,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-13 23:52:25,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:52:25,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 23:52:25,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:52:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:52:25,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:52:25,520 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:52:25,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610987740] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:52:25,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:52:25,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 11] total 20 [2023-02-13 23:52:25,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150176774] [2023-02-13 23:52:25,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:52:25,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-13 23:52:25,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:52:25,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-13 23:52:25,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-02-13 23:52:25,522 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:26,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:52:26,958 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2023-02-13 23:52:26,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-13 23:52:26,959 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-13 23:52:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:52:26,959 INFO L225 Difference]: With dead ends: 58 [2023-02-13 23:52:26,959 INFO L226 Difference]: Without dead ends: 43 [2023-02-13 23:52:26,960 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=284, Invalid=472, Unknown=0, NotChecked=0, Total=756 [2023-02-13 23:52:26,960 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 23:52:26,961 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 23 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 23:52:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-13 23:52:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-02-13 23:52:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-02-13 23:52:26,966 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 24 [2023-02-13 23:52:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:52:26,966 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-02-13 23:52:26,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:26,966 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-02-13 23:52:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-13 23:52:26,967 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:26,967 INFO L195 NwaCegarLoop]: trace histogram [18, 13, 5, 1, 1, 1, 1, 1, 1] [2023-02-13 23:52:26,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 23:52:27,167 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 [2023-02-13 23:52:27,168 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:27,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:27,168 INFO L85 PathProgramCache]: Analyzing trace with hash 286774065, now seen corresponding path program 4 times [2023-02-13 23:52:27,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:27,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806911249] [2023-02-13 23:52:27,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:27,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 126 proven. 182 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 23:52:27,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:27,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806911249] [2023-02-13 23:52:27,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806911249] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:52:27,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006871551] [2023-02-13 23:52:27,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 23:52:27,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:52:27,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:52:27,468 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:52:27,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 23:52:27,514 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 23:52:27,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:52:27,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-13 23:52:27,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:52:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:52:27,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:52:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 272 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 23:52:28,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006871551] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:52:28,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:52:28,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 20] total 38 [2023-02-13 23:52:28,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303262708] [2023-02-13 23:52:28,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:52:28,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-13 23:52:28,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:52:28,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-13 23:52:28,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=994, Unknown=0, NotChecked=0, Total=1406 [2023-02-13 23:52:28,348 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 23:52:56,525 INFO L93 Difference]: Finished difference Result 94 states and 122 transitions. [2023-02-13 23:52:56,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-13 23:52:56,525 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2023-02-13 23:52:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 23:52:56,526 INFO L225 Difference]: With dead ends: 94 [2023-02-13 23:52:56,526 INFO L226 Difference]: Without dead ends: 79 [2023-02-13 23:52:56,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=1058, Invalid=1912, Unknown=0, NotChecked=0, Total=2970 [2023-02-13 23:52:56,527 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 23:52:56,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 36 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 23:52:56,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-13 23:52:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-02-13 23:52:56,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 78 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 84 transitions. [2023-02-13 23:52:56,539 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 84 transitions. Word has length 42 [2023-02-13 23:52:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 23:52:56,541 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 84 transitions. [2023-02-13 23:52:56,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1052631578947367) internal successors, (80), 38 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:52:56,542 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 84 transitions. [2023-02-13 23:52:56,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-02-13 23:52:56,543 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 23:52:56,543 INFO L195 NwaCegarLoop]: trace histogram [36, 31, 5, 1, 1, 1, 1, 1, 1] [2023-02-13 23:52:56,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-13 23:52:56,747 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 [2023-02-13 23:52:56,748 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 23:52:56,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 23:52:56,748 INFO L85 PathProgramCache]: Analyzing trace with hash 195541479, now seen corresponding path program 5 times [2023-02-13 23:52:56,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 23:52:56,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513141568] [2023-02-13 23:52:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 23:52:56,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 23:52:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 23:52:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 288 proven. 992 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-13 23:52:57,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 23:52:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513141568] [2023-02-13 23:52:57,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513141568] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 23:52:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818894511] [2023-02-13 23:52:57,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 23:52:57,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 23:52:57,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 23:52:57,684 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 23:52:57,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 23:53:03,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2023-02-13 23:53:03,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 23:53:03,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-13 23:53:03,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 23:53:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:53:03,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 23:53:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 23:53:05,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818894511] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 23:53:05,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 23:53:05,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39, 39] total 77 [2023-02-13 23:53:05,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879407518] [2023-02-13 23:53:05,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 23:53:05,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-13 23:53:05,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 23:53:05,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-13 23:53:05,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1589, Invalid=4263, Unknown=0, NotChecked=0, Total=5852 [2023-02-13 23:53:05,768 INFO L87 Difference]: Start difference. First operand 79 states and 84 transitions. Second operand has 77 states, 77 states have (on average 2.051948051948052) internal successors, (158), 77 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 23:53:29,098 WARN L233 SmtUtils]: Spent 8.93s on a formula simplification. DAG size of input: 150 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:53:57,129 WARN L233 SmtUtils]: Spent 8.10s on a formula simplification. DAG size of input: 142 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-13 23:54:24,097 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification. DAG size of input: 134 DAG size of output: 10 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)