./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/loops-crafted-1/mono-crafted_13.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 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 11:11:52,129 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 11:11:52,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 11:11:52,162 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 11:11:52,162 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 11:11:52,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 11:11:52,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 11:11:52,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 11:11:52,170 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 11:11:52,171 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 11:11:52,172 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 11:11:52,173 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 11:11:52,174 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 11:11:52,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 11:11:52,178 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 11:11:52,180 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 11:11:52,182 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 11:11:52,182 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 11:11:52,186 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 11:11:52,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 11:11:52,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 11:11:52,191 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 11:11:52,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 11:11:52,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 11:11:52,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 11:11:52,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 11:11:52,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 11:11:52,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 11:11:52,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 11:11:52,199 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 11:11:52,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 11:11:52,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 11:11:52,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 11:11:52,201 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 11:11:52,201 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 11:11:52,201 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 11:11:52,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 11:11:52,202 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 11:11:52,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 11:11:52,203 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 11:11:52,204 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 11:11:52,204 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 11:11:52,220 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 11:11:52,220 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 11:11:52,220 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 11:11:52,221 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 11:11:52,221 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 11:11:52,221 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 11:11:52,222 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 11:11:52,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 11:11:52,222 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 11:11:52,223 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 11:11:52,223 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 11:11:52,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 11:11:52,223 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 11:11:52,223 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 11:11:52,223 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 11:11:52,224 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 11:11:52,224 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 11:11:52,224 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 11:11:52,224 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 11:11:52,224 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 11:11:52,224 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 11:11:52,225 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 11:11:52,225 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 11:11:52,225 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 11:11:52,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:11:52,225 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 11:11:52,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 11:11:52,226 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 11:11:52,226 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 11:11:52,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 11:11:52,226 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 11:11:52,226 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 11:11:52,226 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 11:11:52,227 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 11:11:52,227 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 11:11:52,227 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 [2023-02-15 11:11:52,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 11:11:52,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 11:11:52,461 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 11:11:52,462 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 11:11:52,462 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 11:11:52,463 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2023-02-15 11:11:53,371 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 11:11:53,539 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 11:11:53,539 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2023-02-15 11:11:53,543 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace208aca/14a4103bf3504f8a85d84ca0c98e527d/FLAGca044cc9e [2023-02-15 11:11:53,559 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ace208aca/14a4103bf3504f8a85d84ca0c98e527d [2023-02-15 11:11:53,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 11:11:53,562 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 11:11:53,564 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 11:11:53,564 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 11:11:53,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 11:11:53,566 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,569 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163936e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53, skipping insertion in model container [2023-02-15 11:11:53,569 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 11:11:53,584 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 11:11:53,666 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/loops-crafted-1/mono-crafted_13.c[319,332] [2023-02-15 11:11:53,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:11:53,679 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 11:11:53,685 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/loops-crafted-1/mono-crafted_13.c[319,332] [2023-02-15 11:11:53,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 11:11:53,695 INFO L208 MainTranslator]: Completed translation [2023-02-15 11:11:53,695 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53 WrapperNode [2023-02-15 11:11:53,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 11:11:53,696 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 11:11:53,697 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 11:11:53,697 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 11:11:53,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,705 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,715 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 42 [2023-02-15 11:11:53,715 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 11:11:53,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 11:11:53,716 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 11:11:53,716 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 11:11:53,721 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,723 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,723 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,735 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 11:11:53,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 11:11:53,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 11:11:53,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 11:11:53,737 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (1/1) ... [2023-02-15 11:11:53,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 11:11:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:53,756 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 11:11:53,763 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 11:11:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 11:11:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 11:11:53,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 11:11:53,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 11:11:53,824 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 11:11:53,826 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 11:11:53,903 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 11:11:53,907 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 11:11:53,907 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 11:11:53,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:11:53 BoogieIcfgContainer [2023-02-15 11:11:53,908 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 11:11:53,910 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 11:11:53,910 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 11:11:53,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 11:11:53,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 11:11:53" (1/3) ... [2023-02-15 11:11:53,912 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a4d95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:11:53, skipping insertion in model container [2023-02-15 11:11:53,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 11:11:53" (2/3) ... [2023-02-15 11:11:53,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a4d95f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 11:11:53, skipping insertion in model container [2023-02-15 11:11:53,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 11:11:53" (3/3) ... [2023-02-15 11:11:53,913 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2023-02-15 11:11:53,924 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 11:11:53,924 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 11:11:53,961 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 11:11:53,966 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;@20b9e278, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 11:11:53,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 11:11:53,969 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:53,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:11:53,973 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:53,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:53,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:53,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:53,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1818421976, now seen corresponding path program 1 times [2023-02-15 11:11:53,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:53,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499396867] [2023-02-15 11:11:53,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:53,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:54,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:54,083 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 11:11:54,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:54,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499396867] [2023-02-15 11:11:54,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499396867] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:11:54,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:11:54,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-15 11:11:54,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134333624] [2023-02-15 11:11:54,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:11:54,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-15 11:11:54,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-15 11:11:54,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-15 11:11:54,124 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 11:11:54,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:54,134 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2023-02-15 11:11:54,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-15 11:11:54,136 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 11:11:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:54,140 INFO L225 Difference]: With dead ends: 22 [2023-02-15 11:11:54,140 INFO L226 Difference]: Without dead ends: 9 [2023-02-15 11:11:54,142 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 11:11:54,144 INFO L413 NwaCegarLoop]: 15 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, 15 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 11:11:54,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:11:54,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-02-15 11:11:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-02-15 11:11:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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 11:11:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2023-02-15 11:11:54,161 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2023-02-15 11:11:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:54,161 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2023-02-15 11:11:54,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 11:11:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2023-02-15 11:11:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-15 11:11:54,162 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:54,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:54,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 11:11:54,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:54,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1809186766, now seen corresponding path program 1 times [2023-02-15 11:11:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:54,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726030445] [2023-02-15 11:11:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:54,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:54,207 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 11:11:54,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:54,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726030445] [2023-02-15 11:11:54,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726030445] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:11:54,208 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 11:11:54,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 11:11:54,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798700810] [2023-02-15 11:11:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:11:54,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 11:11:54,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:54,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 11:11:54,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 11:11:54,210 INFO L87 Difference]: Start difference. First operand 9 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 11:11:54,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:54,222 INFO L93 Difference]: Finished difference Result 18 states and 24 transitions. [2023-02-15 11:11:54,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 11:11:54,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 11:11:54,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:54,230 INFO L225 Difference]: With dead ends: 18 [2023-02-15 11:11:54,230 INFO L226 Difference]: Without dead ends: 11 [2023-02-15 11:11:54,230 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 [2023-02-15 11:11:54,231 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:54,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 13 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:11:54,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-15 11:11:54,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-15 11:11:54,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states 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 11:11:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2023-02-15 11:11:54,234 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 7 [2023-02-15 11:11:54,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:54,234 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2023-02-15 11:11:54,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states 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 11:11:54,234 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2023-02-15 11:11:54,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-15 11:11:54,235 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:54,235 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:54,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-15 11:11:54,235 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:54,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:54,236 INFO L85 PathProgramCache]: Analyzing trace with hash 576672011, now seen corresponding path program 1 times [2023-02-15 11:11:54,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:54,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459172331] [2023-02-15 11:11:54,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:54,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:54,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:54,284 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 11:11:54,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:54,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459172331] [2023-02-15 11:11:54,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459172331] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:54,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647602258] [2023-02-15 11:11:54,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:54,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:54,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:54,288 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 11:11:54,289 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 11:11:54,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:54,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 11:11:54,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:54,386 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 11:11:54,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:11:54,418 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 11:11:54,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647602258] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:11:54,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:11:54,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 11:11:54,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100767380] [2023-02-15 11:11:54,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:11:54,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 11:11:54,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:54,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 11:11:54,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:11:54,420 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:54,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:54,456 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2023-02-15 11:11:54,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 11:11:54,456 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-15 11:11:54,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:54,457 INFO L225 Difference]: With dead ends: 22 [2023-02-15 11:11:54,457 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 11:11:54,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 11:11:54,458 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:54,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 16 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:11:54,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 11:11:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-02-15 11:11:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:54,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-02-15 11:11:54,461 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 9 [2023-02-15 11:11:54,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:54,461 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-02-15 11:11:54,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:54,461 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-02-15 11:11:54,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-15 11:11:54,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:54,462 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:54,472 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 11:11:54,662 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 11:11:54,663 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:54,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:54,663 INFO L85 PathProgramCache]: Analyzing trace with hash 571958019, now seen corresponding path program 1 times [2023-02-15 11:11:54,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:54,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010982477] [2023-02-15 11:11:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:54,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:54,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:11:54,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:54,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010982477] [2023-02-15 11:11:54,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010982477] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:54,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730017079] [2023-02-15 11:11:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:54,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:54,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:54,750 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 11:11:54,751 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 11:11:54,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:54,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 11:11:54,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:54,816 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:11:54,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:11:54,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:11:54,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730017079] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:11:54,843 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:11:54,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2023-02-15 11:11:54,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788521157] [2023-02-15 11:11:54,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:11:54,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-15 11:11:54,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:54,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-15 11:11:54,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:11:54,845 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 11:11:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:54,871 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2023-02-15 11:11:54,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 11:11:54,872 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 11:11:54,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:54,872 INFO L225 Difference]: With dead ends: 30 [2023-02-15 11:11:54,872 INFO L226 Difference]: Without dead ends: 22 [2023-02-15 11:11:54,873 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2023-02-15 11:11:54,873 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:54,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:11:54,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-15 11:11:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-02-15 11:11:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 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) [2023-02-15 11:11:54,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-02-15 11:11:54,877 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 13 [2023-02-15 11:11:54,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:54,880 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-02-15 11:11:54,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 11:11:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-02-15 11:11:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-15 11:11:54,881 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:54,881 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:54,888 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 11:11:55,082 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 11:11:55,082 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:55,083 INFO L85 PathProgramCache]: Analyzing trace with hash -870720137, now seen corresponding path program 2 times [2023-02-15 11:11:55,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:55,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970654837] [2023-02-15 11:11:55,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:55,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:55,212 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:11:55,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:55,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970654837] [2023-02-15 11:11:55,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970654837] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:55,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333085266] [2023-02-15 11:11:55,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:11:55,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:55,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:55,225 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 11:11:55,226 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 11:11:55,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:11:55,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:11:55,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-15 11:11:55,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:11:55,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:11:55,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:11:55,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333085266] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:11:55,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:11:55,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2023-02-15 11:11:55,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015648654] [2023-02-15 11:11:55,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:11:55,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 11:11:55,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:55,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 11:11:55,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:11:55,408 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 11:11:55,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:55,463 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2023-02-15 11:11:55,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-02-15 11:11:55,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 11:11:55,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:55,465 INFO L225 Difference]: With dead ends: 46 [2023-02-15 11:11:55,466 INFO L226 Difference]: Without dead ends: 38 [2023-02-15 11:11:55,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-02-15 11:11:55,468 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:55,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:11:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-15 11:11:55,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-15 11:11:55,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:55,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-02-15 11:11:55,475 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2023-02-15 11:11:55,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:55,476 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-02-15 11:11:55,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 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 11:11:55,476 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-02-15 11:11:55,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-15 11:11:55,477 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:55,477 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:55,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 11:11:55,681 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 11:11:55,682 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:55,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:55,682 INFO L85 PathProgramCache]: Analyzing trace with hash 114013791, now seen corresponding path program 3 times [2023-02-15 11:11:55,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:55,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003954718] [2023-02-15 11:11:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:55,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:55,895 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 11:11:55,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:55,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003954718] [2023-02-15 11:11:55,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003954718] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501752362] [2023-02-15 11:11:55,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:11:55,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:55,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:55,900 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 11:11:55,902 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 11:11:55,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 11:11:55,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:11:55,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 11:11:55,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2023-02-15 11:11:56,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-15 11:11:56,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501752362] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 11:11:56,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-15 11:11:56,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [17] total 19 [2023-02-15 11:11:56,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331723023] [2023-02-15 11:11:56,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 11:11:56,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 11:11:56,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 11:11:56,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2023-02-15 11:11:56,024 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 11:11:56,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:56,034 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-02-15 11:11:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 11:11:56,035 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-15 11:11:56,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:56,035 INFO L225 Difference]: With dead ends: 46 [2023-02-15 11:11:56,035 INFO L226 Difference]: Without dead ends: 42 [2023-02-15 11:11:56,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2023-02-15 11:11:56,036 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:56,036 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 17 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 11:11:56,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-15 11:11:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2023-02-15 11:11:56,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:56,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-02-15 11:11:56,041 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 37 [2023-02-15 11:11:56,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:56,041 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-02-15 11:11:56,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 11:11:56,041 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-02-15 11:11:56,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-15 11:11:56,042 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:56,042 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:56,049 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 11:11:56,249 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 11:11:56,249 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:56,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:56,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2048604129, now seen corresponding path program 1 times [2023-02-15 11:11:56,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:56,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818530435] [2023-02-15 11:11:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:56,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:56,432 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:11:56,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:56,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818530435] [2023-02-15 11:11:56,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818530435] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:56,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328137882] [2023-02-15 11:11:56,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:56,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:56,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:56,433 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 11:11:56,435 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 11:11:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:56,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 11:11:56,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:56,512 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:11:56,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:11:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:11:56,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328137882] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:11:56,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:11:56,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2023-02-15 11:11:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669226951] [2023-02-15 11:11:56,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:11:56,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 11:11:56,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:56,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 11:11:56,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 11:11:56,768 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 11:11:56,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:56,837 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2023-02-15 11:11:56,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 11:11:56,838 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 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 39 [2023-02-15 11:11:56,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:56,838 INFO L225 Difference]: With dead ends: 82 [2023-02-15 11:11:56,838 INFO L226 Difference]: Without dead ends: 72 [2023-02-15 11:11:56,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 11:11:56,839 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:56,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:11:56,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-15 11:11:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-02-15 11:11:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:56,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-02-15 11:11:56,846 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 39 [2023-02-15 11:11:56,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:56,846 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-02-15 11:11:56,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states 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 11:11:56,846 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-02-15 11:11:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-15 11:11:56,847 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:56,848 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:56,854 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 11:11:57,052 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 11:11:57,052 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:57,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:57,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1608701423, now seen corresponding path program 2 times [2023-02-15 11:11:57,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:57,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400648959] [2023-02-15 11:11:57,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:57,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:11:57,618 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:11:57,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:11:57,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400648959] [2023-02-15 11:11:57,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400648959] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:11:57,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288946224] [2023-02-15 11:11:57,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 11:11:57,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:11:57,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:11:57,620 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 11:11:57,630 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 11:11:57,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 11:11:57,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:11:57,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-15 11:11:57,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:11:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:11:57,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:11:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:11:58,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288946224] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:11:58,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:11:58,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2023-02-15 11:11:58,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591612248] [2023-02-15 11:11:58,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:11:58,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-15 11:11:58,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:11:58,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-15 11:11:58,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 11:11:58,675 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 11:11:58,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:11:58,838 INFO L93 Difference]: Finished difference Result 146 states and 182 transitions. [2023-02-15 11:11:58,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-02-15 11:11:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 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 71 [2023-02-15 11:11:58,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:11:58,842 INFO L225 Difference]: With dead ends: 146 [2023-02-15 11:11:58,843 INFO L226 Difference]: Without dead ends: 136 [2023-02-15 11:11:58,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 11:11:58,845 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:11:58,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:11:58,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-15 11:11:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2023-02-15 11:11:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:11:58,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2023-02-15 11:11:58,874 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 71 [2023-02-15 11:11:58,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:11:58,874 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2023-02-15 11:11:58,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0923076923076924) internal successors, (136), 65 states have internal predecessors, (136), 0 states have call successors, (0), 0 states 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 11:11:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2023-02-15 11:11:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-02-15 11:11:58,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:11:58,879 INFO L195 NwaCegarLoop]: trace histogram [63, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:11:58,885 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 11:11:59,087 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 11:11:59,087 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:11:59,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:11:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1000525425, now seen corresponding path program 3 times [2023-02-15 11:11:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:11:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947954634] [2023-02-15 11:11:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:11:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:11:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:12:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-02-15 11:12:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:12:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947954634] [2023-02-15 11:12:00,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947954634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:12:00,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971478927] [2023-02-15 11:12:00,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 11:12:00,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:12:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:12:00,993 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 11:12:00,993 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 11:12:01,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 11:12:01,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:12:01,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 11:12:01,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:12:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2023-02-15 11:12:01,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:12:01,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3972 backedges. 63 proven. 3 refuted. 0 times theorem prover too weak. 3906 trivial. 0 not checked. [2023-02-15 11:12:01,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971478927] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:12:01,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:12:01,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 5, 5] total 71 [2023-02-15 11:12:01,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305320980] [2023-02-15 11:12:01,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:12:01,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-15 11:12:01,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:12:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-15 11:12:01,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2107, Invalid=2863, Unknown=0, NotChecked=0, Total=4970 [2023-02-15 11:12:01,587 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:12:03,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:12:03,228 INFO L93 Difference]: Finished difference Result 154 states and 164 transitions. [2023-02-15 11:12:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-15 11:12:03,229 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-02-15 11:12:03,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:12:03,229 INFO L225 Difference]: With dead ends: 154 [2023-02-15 11:12:03,229 INFO L226 Difference]: Without dead ends: 144 [2023-02-15 11:12:03,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2337 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6454, Invalid=11368, Unknown=0, NotChecked=0, Total=17822 [2023-02-15 11:12:03,234 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 11:12:03,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 33 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 11:12:03,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-02-15 11:12:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2023-02-15 11:12:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 0 states 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 11:12:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2023-02-15 11:12:03,248 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 135 [2023-02-15 11:12:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:12:03,249 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2023-02-15 11:12:03,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.112676056338028) internal successors, (150), 71 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:12:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2023-02-15 11:12:03,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-02-15 11:12:03,254 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:12:03,254 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:12:03,259 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 11:12:03,459 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 11:12:03,460 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:12:03,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:12:03,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1372821556, now seen corresponding path program 4 times [2023-02-15 11:12:03,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:12:03,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165495247] [2023-02-15 11:12:03,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:12:03,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:12:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:12:05,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:12:05,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:12:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165495247] [2023-02-15 11:12:05,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165495247] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:12:05,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506463419] [2023-02-15 11:12:05,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 11:12:05,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:12:05,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:12:05,159 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 11:12:05,209 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 11:12:05,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 11:12:05,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:12:05,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-15 11:12:05,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:12:05,380 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:12:05,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:12:08,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4117 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:12:08,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506463419] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:12:08,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:12:08,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 131 [2023-02-15 11:12:08,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173324077] [2023-02-15 11:12:08,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:12:08,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-02-15 11:12:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:12:08,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-02-15 11:12:08,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2023-02-15 11:12:08,820 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:12:09,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:12:09,088 INFO L93 Difference]: Finished difference Result 286 states and 355 transitions. [2023-02-15 11:12:09,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-02-15 11:12:09,088 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2023-02-15 11:12:09,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:12:09,090 INFO L225 Difference]: With dead ends: 286 [2023-02-15 11:12:09,091 INFO L226 Difference]: Without dead ends: 272 [2023-02-15 11:12:09,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2023-02-15 11:12:09,094 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 11:12:09,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 11:12:09,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2023-02-15 11:12:09,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2023-02-15 11:12:09,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.011070110701107) internal successors, (274), 271 states have internal predecessors, (274), 0 states have call successors, (0), 0 states 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 11:12:09,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 274 transitions. [2023-02-15 11:12:09,105 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 274 transitions. Word has length 141 [2023-02-15 11:12:09,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:12:09,105 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 274 transitions. [2023-02-15 11:12:09,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.045801526717557) internal successors, (268), 131 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 11:12:09,105 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 274 transitions. [2023-02-15 11:12:09,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2023-02-15 11:12:09,107 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:12:09,107 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:12:09,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 11:12:09,313 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 11:12:09,314 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:12:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:12:09,314 INFO L85 PathProgramCache]: Analyzing trace with hash 2118041225, now seen corresponding path program 5 times [2023-02-15 11:12:09,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:12:09,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965662207] [2023-02-15 11:12:09,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:12:09,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:12:09,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:12:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:12:15,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:12:15,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965662207] [2023-02-15 11:12:15,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965662207] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:12:15,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992290929] [2023-02-15 11:12:15,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 11:12:15,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:12:15,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:12:15,395 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 11:12:15,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 11:12:15,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 130 check-sat command(s) [2023-02-15 11:12:15,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:12:15,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 130 conjunts are in the unsatisfiable core [2023-02-15 11:12:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:12:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:12:15,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:12:29,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16662 backedges. 129 proven. 16512 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:12:29,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992290929] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:12:29,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:12:29,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [131, 131, 131] total 261 [2023-02-15 11:12:29,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101647355] [2023-02-15 11:12:29,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:12:29,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2023-02-15 11:12:29,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:12:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2023-02-15 11:12:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2023-02-15 11:12:29,434 INFO L87 Difference]: Start difference. First operand 272 states and 274 transitions. Second operand has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 11:12:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:12:30,335 INFO L93 Difference]: Finished difference Result 546 states and 680 transitions. [2023-02-15 11:12:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2023-02-15 11:12:30,335 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 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 271 [2023-02-15 11:12:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:12:30,337 INFO L225 Difference]: With dead ends: 546 [2023-02-15 11:12:30,337 INFO L226 Difference]: Without dead ends: 532 [2023-02-15 11:12:30,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 671 GetRequests, 412 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2023-02-15 11:12:30,340 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 11:12:30,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 11:12:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2023-02-15 11:12:30,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 532. [2023-02-15 11:12:30,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 1.0056497175141244) internal successors, (534), 531 states have internal predecessors, (534), 0 states have call successors, (0), 0 states 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 11:12:30,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 534 transitions. [2023-02-15 11:12:30,355 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 534 transitions. Word has length 271 [2023-02-15 11:12:30,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:12:30,356 INFO L495 AbstractCegarLoop]: Abstraction has 532 states and 534 transitions. [2023-02-15 11:12:30,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0229885057471266) internal successors, (528), 261 states have internal predecessors, (528), 0 states have call successors, (0), 0 states 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 11:12:30,356 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 534 transitions. [2023-02-15 11:12:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-02-15 11:12:30,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:12:30,361 INFO L195 NwaCegarLoop]: trace histogram [259, 258, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:12:30,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 11:12:30,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:12:30,566 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:12:30,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:12:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1610521155, now seen corresponding path program 6 times [2023-02-15 11:12:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:12:30,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213642913] [2023-02-15 11:12:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:12:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:12:30,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:12:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 259 proven. 66822 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-02-15 11:12:57,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:12:57,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213642913] [2023-02-15 11:12:57,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213642913] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:12:57,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084867395] [2023-02-15 11:12:57,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 11:12:57,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:12:57,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:12:57,291 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:12:57,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 11:12:57,359 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 11:12:57,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 11:12:57,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 11:12:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:12:57,657 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2023-02-15 11:12:57,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:12:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 67102 backedges. 774 proven. 1 refuted. 0 times theorem prover too weak. 66327 trivial. 0 not checked. [2023-02-15 11:12:58,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084867395] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:12:58,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:12:58,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [261, 4, 4] total 265 [2023-02-15 11:12:58,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145052592] [2023-02-15 11:12:58,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:12:58,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2023-02-15 11:12:58,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:12:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2023-02-15 11:12:58,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2023-02-15 11:12:58,042 INFO L87 Difference]: Start difference. First operand 532 states and 534 transitions. Second operand has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 11:12:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:12:58,989 INFO L93 Difference]: Finished difference Result 554 states and 565 transitions. [2023-02-15 11:12:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 265 states. [2023-02-15 11:12:58,990 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 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 531 [2023-02-15 11:12:58,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:12:58,992 INFO L225 Difference]: With dead ends: 554 [2023-02-15 11:12:58,993 INFO L226 Difference]: Without dead ends: 540 [2023-02-15 11:12:58,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1321 GetRequests, 1058 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=34980, Invalid=34980, Unknown=0, NotChecked=0, Total=69960 [2023-02-15 11:12:58,995 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 2 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 11:12:58,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 28 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 11:12:58,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-02-15 11:12:59,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 540. [2023-02-15 11:12:59,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 1.0111317254174397) internal successors, (545), 539 states have internal predecessors, (545), 0 states have call successors, (0), 0 states 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 11:12:59,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 545 transitions. [2023-02-15 11:12:59,013 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 545 transitions. Word has length 531 [2023-02-15 11:12:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:12:59,014 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 545 transitions. [2023-02-15 11:12:59,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 2.026415094339623) internal successors, (537), 265 states have internal predecessors, (537), 0 states have call successors, (0), 0 states 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 11:12:59,014 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 545 transitions. [2023-02-15 11:12:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2023-02-15 11:12:59,020 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:12:59,020 INFO L195 NwaCegarLoop]: trace histogram [263, 259, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:12:59,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 11:12:59,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-15 11:12:59,224 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:12:59,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:12:59,224 INFO L85 PathProgramCache]: Analyzing trace with hash -2107211535, now seen corresponding path program 7 times [2023-02-15 11:12:59,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:12:59,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456841717] [2023-02-15 11:12:59,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:12:59,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:12:59,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:13:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 11:13:26,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 11:13:26,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456841717] [2023-02-15 11:13:26,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456841717] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 11:13:26,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783978154] [2023-02-15 11:13:26,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 11:13:26,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 11:13:26,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 11:13:26,154 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 11:13:26,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 11:13:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 11:13:26,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 1130 conjuncts, 261 conjunts are in the unsatisfiable core [2023-02-15 11:13:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 11:13:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 11:13:26,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 11:14:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 69190 backedges. 1820 proven. 67340 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-02-15 11:14:22,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783978154] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 11:14:22,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 11:14:22,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [262, 262, 262] total 523 [2023-02-15 11:14:22,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312638000] [2023-02-15 11:14:22,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 11:14:22,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 523 states [2023-02-15 11:14:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 11:14:22,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 523 interpolants. [2023-02-15 11:14:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2023-02-15 11:14:22,795 INFO L87 Difference]: Start difference. First operand 540 states and 545 transitions. Second operand has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 11:14:27,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 11:14:27,045 INFO L93 Difference]: Finished difference Result 1082 states and 1353 transitions. [2023-02-15 11:14:27,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 522 states. [2023-02-15 11:14:27,046 INFO L78 Accepts]: Start accepts. Automaton has has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 0 states have call successors, (0), 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 539 [2023-02-15 11:14:27,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 11:14:27,049 INFO L225 Difference]: With dead ends: 1082 [2023-02-15 11:14:27,049 INFO L226 Difference]: Without dead ends: 1062 [2023-02-15 11:14:27,057 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1338 GetRequests, 817 SyntacticMatches, 0 SemanticMatches, 521 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 73.4s TimeCoverageRelationStatistics Valid=136503, Invalid=136503, Unknown=0, NotChecked=0, Total=273006 [2023-02-15 11:14:27,057 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 11:14:27,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 11:14:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1062 states. [2023-02-15 11:14:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1062 to 1062. [2023-02-15 11:14:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1062 states, 1061 states have (on average 1.0056550424128181) internal successors, (1067), 1061 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states 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 11:14:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1062 states to 1062 states and 1067 transitions. [2023-02-15 11:14:27,123 INFO L78 Accepts]: Start accepts. Automaton has 1062 states and 1067 transitions. Word has length 539 [2023-02-15 11:14:27,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 11:14:27,124 INFO L495 AbstractCegarLoop]: Abstraction has 1062 states and 1067 transitions. [2023-02-15 11:14:27,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 523 states, 523 states have (on average 2.0152963671128106) internal successors, (1054), 523 states have internal predecessors, (1054), 0 states have call successors, (0), 0 states 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 11:14:27,125 INFO L276 IsEmpty]: Start isEmpty. Operand 1062 states and 1067 transitions. [2023-02-15 11:14:27,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1062 [2023-02-15 11:14:27,131 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 11:14:27,131 INFO L195 NwaCegarLoop]: trace histogram [524, 520, 6, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 11:14:27,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 11:14:27,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-15 11:14:27,332 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 11:14:27,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 11:14:27,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1707818718, now seen corresponding path program 8 times [2023-02-15 11:14:27,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 11:14:27,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306663149] [2023-02-15 11:14:27,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 11:14:27,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 11:14:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat