./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep60-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 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/reducercommutativity/sep60-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 21:33:12,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 21:33:12,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 21:33:12,883 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 21:33:12,884 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 21:33:12,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 21:33:12,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 21:33:12,890 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 21:33:12,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 21:33:12,897 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 21:33:12,898 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 21:33:12,900 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 21:33:12,900 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 21:33:12,902 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 21:33:12,903 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 21:33:12,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 21:33:12,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 21:33:12,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 21:33:12,907 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 21:33:12,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 21:33:12,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 21:33:12,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 21:33:12,915 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 21:33:12,916 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 21:33:12,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 21:33:12,918 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 21:33:12,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 21:33:12,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 21:33:12,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 21:33:12,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 21:33:12,920 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 21:33:12,921 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 21:33:12,922 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 21:33:12,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 21:33:12,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 21:33:12,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 21:33:12,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 21:33:12,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 21:33:12,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 21:33:12,925 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 21:33:12,926 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 21:33:12,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 21:33:12,953 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 21:33:12,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 21:33:12,953 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 21:33:12,954 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 21:33:12,954 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 21:33:12,954 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 21:33:12,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 21:33:12,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 21:33:12,955 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 21:33:12,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 21:33:12,956 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 21:33:12,956 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 21:33:12,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 21:33:12,957 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 21:33:12,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 21:33:12,958 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 21:33:12,958 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 21:33:12,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:33:12,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 21:33:12,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 21:33:12,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 21:33:12,959 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 21:33:12,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 21:33:12,959 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 21:33:12,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 21:33:12,960 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 21:33:12,960 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 21:33:12,960 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 21:33:12,960 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b065e6ebd473a7ead2bba44643aa633e2e19aa846c3de415abaad6e73d224b64 [2023-02-14 21:33:13,131 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 21:33:13,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 21:33:13,147 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 21:33:13,147 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 21:33:13,148 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 21:33:13,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-02-14 21:33:14,229 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 21:33:14,379 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 21:33:14,380 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep60-2.i [2023-02-14 21:33:14,384 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df8f44b4/77d3a30c032d492688cea8d249ab48a9/FLAGc33b6f43d [2023-02-14 21:33:14,394 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4df8f44b4/77d3a30c032d492688cea8d249ab48a9 [2023-02-14 21:33:14,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 21:33:14,397 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 21:33:14,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 21:33:14,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 21:33:14,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 21:33:14,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,402 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11a05894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14, skipping insertion in model container [2023-02-14 21:33:14,402 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 21:33:14,418 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 21:33:14,515 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/reducercommutativity/sep60-2.i[1293,1306] [2023-02-14 21:33:14,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:33:14,524 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 21:33:14,538 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/reducercommutativity/sep60-2.i[1293,1306] [2023-02-14 21:33:14,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:33:14,548 INFO L208 MainTranslator]: Completed translation [2023-02-14 21:33:14,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14 WrapperNode [2023-02-14 21:33:14,549 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 21:33:14,550 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 21:33:14,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 21:33:14,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 21:33:14,555 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,561 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,573 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2023-02-14 21:33:14,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 21:33:14,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 21:33:14,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 21:33:14,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 21:33:14,580 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,582 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,582 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,589 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,591 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 21:33:14,592 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 21:33:14,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 21:33:14,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 21:33:14,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (1/1) ... [2023-02-14 21:33:14,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:33:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:14,642 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) [2023-02-14 21:33:14,664 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 [2023-02-14 21:33:14,679 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 21:33:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 21:33:14,680 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 21:33:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 21:33:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 21:33:14,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 21:33:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 21:33:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 21:33:14,681 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2023-02-14 21:33:14,682 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2023-02-14 21:33:14,753 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 21:33:14,755 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 21:33:14,940 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 21:33:14,944 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 21:33:14,944 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-14 21:33:14,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:33:14 BoogieIcfgContainer [2023-02-14 21:33:14,946 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 21:33:14,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 21:33:14,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 21:33:14,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 21:33:14,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:33:14" (1/3) ... [2023-02-14 21:33:14,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e95387f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:33:14, skipping insertion in model container [2023-02-14 21:33:14,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:33:14" (2/3) ... [2023-02-14 21:33:14,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e95387f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:33:14, skipping insertion in model container [2023-02-14 21:33:14,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:33:14" (3/3) ... [2023-02-14 21:33:14,957 INFO L112 eAbstractionObserver]: Analyzing ICFG sep60-2.i [2023-02-14 21:33:14,975 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 21:33:14,975 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 21:33:15,037 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 21:33:15,047 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;@47fb3d9c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 21:33:15,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 21:33:15,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:15,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 21:33:15,070 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:15,076 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:15,077 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:15,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:15,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2023-02-14 21:33:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:15,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497261207] [2023-02-14 21:33:15,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:15,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-14 21:33:15,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2023-02-14 21:33:15,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2023-02-14 21:33:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,377 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 21:33:15,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:15,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497261207] [2023-02-14 21:33:15,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497261207] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:33:15,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:33:15,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 21:33:15,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39967877] [2023-02-14 21:33:15,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:33:15,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:33:15,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:15,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:33:15,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:33:15,402 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 21:33:15,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:15,423 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2023-02-14 21:33:15,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:33:15,439 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2023-02-14 21:33:15,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:15,443 INFO L225 Difference]: With dead ends: 52 [2023-02-14 21:33:15,443 INFO L226 Difference]: Without dead ends: 25 [2023-02-14 21:33:15,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 21:33:15,447 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:15,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-14 21:33:15,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-02-14 21:33:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:15,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-02-14 21:33:15,470 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2023-02-14 21:33:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:15,470 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-02-14 21:33:15,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-14 21:33:15,471 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-02-14 21:33:15,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 21:33:15,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:15,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:15,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 21:33:15,486 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:15,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:15,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2023-02-14 21:33:15,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:15,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317564149] [2023-02-14 21:33:15,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:15,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 21:33:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2023-02-14 21:33:15,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2023-02-14 21:33:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 21:33:15,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:15,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317564149] [2023-02-14 21:33:15,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317564149] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:15,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698925798] [2023-02-14 21:33:15,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:15,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:15,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:15,654 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) [2023-02-14 21:33:15,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 21:33:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:15,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-14 21:33:15,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:33:15,767 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:33:15,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698925798] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:33:15,767 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 21:33:15,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-14 21:33:15,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822038432] [2023-02-14 21:33:15,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:33:15,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:33:15,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:15,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:33:15,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:33:15,771 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:33:15,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:15,779 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2023-02-14 21:33:15,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:33:15,780 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-14 21:33:15,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:15,781 INFO L225 Difference]: With dead ends: 45 [2023-02-14 21:33:15,781 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 21:33:15,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:33:15,782 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:15,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:15,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 21:33:15,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-14 21:33:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-02-14 21:33:15,786 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2023-02-14 21:33:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:15,787 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-02-14 21:33:15,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:33:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-02-14 21:33:15,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 21:33:15,788 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:15,788 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:15,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 21:33:15,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:15,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:15,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:15,995 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2023-02-14 21:33:15,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:15,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085778925] [2023-02-14 21:33:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:15,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:16,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 21:33:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-14 21:33:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2023-02-14 21:33:16,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 21:33:16,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085778925] [2023-02-14 21:33:16,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085778925] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:16,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880473328] [2023-02-14 21:33:16,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:16,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:16,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:16,128 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) [2023-02-14 21:33:16,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 21:33:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-14 21:33:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:16,218 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 21:33:16,219 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:33:16,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880473328] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:33:16,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 21:33:16,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-02-14 21:33:16,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46670076] [2023-02-14 21:33:16,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:33:16,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 21:33:16,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:16,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 21:33:16,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:33:16,221 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:33:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:16,229 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-14 21:33:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 21:33:16,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2023-02-14 21:33:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:16,230 INFO L225 Difference]: With dead ends: 41 [2023-02-14 21:33:16,231 INFO L226 Difference]: Without dead ends: 27 [2023-02-14 21:33:16,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:33:16,232 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:16,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-14 21:33:16,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-02-14 21:33:16,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-02-14 21:33:16,236 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2023-02-14 21:33:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:16,237 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-02-14 21:33:16,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:33:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-02-14 21:33:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 21:33:16,238 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:16,238 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:16,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:16,444 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,SelfDestructingSolverStorable2 [2023-02-14 21:33:16,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2023-02-14 21:33:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:16,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642146669] [2023-02-14 21:33:16,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:16,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-02-14 21:33:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2023-02-14 21:33:16,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-14 21:33:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,581 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 21:33:16,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:16,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642146669] [2023-02-14 21:33:16,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642146669] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:16,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39205838] [2023-02-14 21:33:16,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:16,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:16,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:16,586 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) [2023-02-14 21:33:16,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 21:33:16,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:16,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-14 21:33:16,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:16,667 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 21:33:16,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:16,694 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-14 21:33:16,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39205838] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:16,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:16,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2023-02-14 21:33:16,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932497197] [2023-02-14 21:33:16,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:16,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 21:33:16,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:16,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 21:33:16,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-14 21:33:16,696 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:16,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:16,723 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2023-02-14 21:33:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-14 21:33:16,723 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-14 21:33:16,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:16,724 INFO L225 Difference]: With dead ends: 58 [2023-02-14 21:33:16,724 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 21:33:16,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-02-14 21:33:16,725 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:16,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 156 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:16,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 21:33:16,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2023-02-14 21:33:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:16,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2023-02-14 21:33:16,729 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2023-02-14 21:33:16,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:16,729 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2023-02-14 21:33:16,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:16,730 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2023-02-14 21:33:16,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 21:33:16,730 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:16,731 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:16,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:16,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:16,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:16,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2023-02-14 21:33:16,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:16,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171254919] [2023-02-14 21:33:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:16,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-02-14 21:33:17,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2023-02-14 21:33:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2023-02-14 21:33:17,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2023-02-14 21:33:17,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171254919] [2023-02-14 21:33:17,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171254919] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:17,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404137340] [2023-02-14 21:33:17,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:33:17,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:17,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:17,091 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) [2023-02-14 21:33:17,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 21:33:17,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:33:17,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:17,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:33:17,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-14 21:33:17,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:17,308 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2023-02-14 21:33:17,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404137340] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:17,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:17,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2023-02-14 21:33:17,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094773691] [2023-02-14 21:33:17,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:17,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-14 21:33:17,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-14 21:33:17,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-14 21:33:17,311 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 21:33:17,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:17,346 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2023-02-14 21:33:17,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 21:33:17,346 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2023-02-14 21:33:17,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:17,347 INFO L225 Difference]: With dead ends: 74 [2023-02-14 21:33:17,347 INFO L226 Difference]: Without dead ends: 50 [2023-02-14 21:33:17,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-02-14 21:33:17,348 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:17,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 111 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:17,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-14 21:33:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-02-14 21:33:17,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-02-14 21:33:17,353 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2023-02-14 21:33:17,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:17,353 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-02-14 21:33:17,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 21:33:17,354 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-02-14 21:33:17,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-02-14 21:33:17,354 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:17,354 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:17,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:17,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:17,560 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:17,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:17,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2023-02-14 21:33:17,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:17,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023435650] [2023-02-14 21:33:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:17,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2023-02-14 21:33:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-14 21:33:17,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-14 21:33:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-14 21:33:17,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:17,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023435650] [2023-02-14 21:33:17,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023435650] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:17,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430425027] [2023-02-14 21:33:17,790 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:33:17,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:17,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:17,792 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) [2023-02-14 21:33:17,817 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 21:33:17,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 21:33:17,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 21:33:17,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:17,913 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-14 21:33:17,914 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2023-02-14 21:33:17,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430425027] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:17,958 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:17,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2023-02-14 21:33:17,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660727313] [2023-02-14 21:33:17,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:17,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-02-14 21:33:17,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:17,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-02-14 21:33:17,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-14 21:33:17,960 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:18,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:18,001 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2023-02-14 21:33:18,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 21:33:18,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2023-02-14 21:33:18,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:18,002 INFO L225 Difference]: With dead ends: 90 [2023-02-14 21:33:18,002 INFO L226 Difference]: Without dead ends: 64 [2023-02-14 21:33:18,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-14 21:33:18,003 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 18 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:18,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 118 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:18,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-14 21:33:18,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-14 21:33:18,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:18,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2023-02-14 21:33:18,008 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 70 [2023-02-14 21:33:18,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:18,009 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2023-02-14 21:33:18,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.526315789473684) internal successors, (67), 19 states have internal predecessors, (67), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:18,009 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2023-02-14 21:33:18,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-14 21:33:18,010 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:18,010 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:18,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 21:33:18,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:18,215 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:18,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:18,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2138241293, now seen corresponding path program 4 times [2023-02-14 21:33:18,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:18,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937403028] [2023-02-14 21:33:18,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:18,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:18,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:18,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2023-02-14 21:33:18,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:18,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2023-02-14 21:33:18,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:18,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-14 21:33:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:18,570 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-14 21:33:18,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937403028] [2023-02-14 21:33:18,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937403028] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:18,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184653461] [2023-02-14 21:33:18,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:33:18,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:18,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:18,593 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) [2023-02-14 21:33:18,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 21:33:18,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:33:18,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-14 21:33:18,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-14 21:33:18,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:18,942 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-14 21:33:18,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184653461] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:18,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:18,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-14 21:33:18,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627181692] [2023-02-14 21:33:18,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:18,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-14 21:33:18,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:18,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-14 21:33:18,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-14 21:33:18,944 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:18,997 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2023-02-14 21:33:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 21:33:18,997 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 108 [2023-02-14 21:33:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:18,998 INFO L225 Difference]: With dead ends: 127 [2023-02-14 21:33:18,998 INFO L226 Difference]: Without dead ends: 89 [2023-02-14 21:33:18,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2023-02-14 21:33:18,999 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:19,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:19,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-02-14 21:33:19,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2023-02-14 21:33:19,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 84 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:19,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2023-02-14 21:33:19,005 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 108 [2023-02-14 21:33:19,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:19,005 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2023-02-14 21:33:19,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.7777777777777777) internal successors, (75), 27 states have internal predecessors, (75), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:19,005 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2023-02-14 21:33:19,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-14 21:33:19,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:19,006 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:19,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:19,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:19,212 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:19,212 INFO L85 PathProgramCache]: Analyzing trace with hash 819840039, now seen corresponding path program 5 times [2023-02-14 21:33:19,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:19,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49920098] [2023-02-14 21:33:19,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:19,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:19,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2023-02-14 21:33:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:19,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-14 21:33:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:19,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2023-02-14 21:33:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2023-02-14 21:33:19,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:19,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49920098] [2023-02-14 21:33:19,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49920098] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:19,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134701429] [2023-02-14 21:33:19,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:33:19,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:19,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:19,959 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) [2023-02-14 21:33:20,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 21:33:22,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-02-14 21:33:22,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:22,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 21:33:22,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 813 trivial. 0 not checked. [2023-02-14 21:33:22,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:22,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 809 trivial. 0 not checked. [2023-02-14 21:33:22,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134701429] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:22,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:22,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 9, 9] total 41 [2023-02-14 21:33:22,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663607981] [2023-02-14 21:33:22,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:22,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-14 21:33:22,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:22,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-14 21:33:22,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 21:33:22,860 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:22,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:22,965 INFO L93 Difference]: Finished difference Result 154 states and 193 transitions. [2023-02-14 21:33:22,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-14 21:33:22,966 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 134 [2023-02-14 21:33:22,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:22,967 INFO L225 Difference]: With dead ends: 154 [2023-02-14 21:33:22,967 INFO L226 Difference]: Without dead ends: 116 [2023-02-14 21:33:22,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2023-02-14 21:33:22,968 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 40 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:22,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 194 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:33:22,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-14 21:33:22,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2023-02-14 21:33:22,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 110 states have internal predecessors, (127), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:22,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 133 transitions. [2023-02-14 21:33:22,974 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 133 transitions. Word has length 134 [2023-02-14 21:33:22,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:22,975 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 133 transitions. [2023-02-14 21:33:22,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.8780487804878048) internal successors, (118), 41 states have internal predecessors, (118), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:22,975 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 133 transitions. [2023-02-14 21:33:22,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-02-14 21:33:22,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:22,976 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 25, 25, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:22,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:23,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:23,186 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:23,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:23,186 INFO L85 PathProgramCache]: Analyzing trace with hash 412352681, now seen corresponding path program 6 times [2023-02-14 21:33:23,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:23,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777984641] [2023-02-14 21:33:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:23,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:24,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-02-14 21:33:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:24,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-14 21:33:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:24,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2023-02-14 21:33:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 2728 trivial. 0 not checked. [2023-02-14 21:33:24,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777984641] [2023-02-14 21:33:24,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777984641] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:24,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996348935] [2023-02-14 21:33:24,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 21:33:24,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:24,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:24,069 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) [2023-02-14 21:33:24,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 21:33:24,170 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-14 21:33:24,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 21:33:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 1242 proven. 4 refuted. 0 times theorem prover too weak. 2107 trivial. 0 not checked. [2023-02-14 21:33:24,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3353 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3349 trivial. 0 not checked. [2023-02-14 21:33:24,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996348935] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:24,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:24,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 5, 5] total 34 [2023-02-14 21:33:24,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759457932] [2023-02-14 21:33:24,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:24,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 21:33:24,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:24,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 21:33:24,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 21:33:24,281 INFO L87 Difference]: Start difference. First operand 115 states and 133 transitions. Second operand has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:24,360 INFO L93 Difference]: Finished difference Result 188 states and 228 transitions. [2023-02-14 21:33:24,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 21:33:24,360 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 208 [2023-02-14 21:33:24,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:24,362 INFO L225 Difference]: With dead ends: 188 [2023-02-14 21:33:24,362 INFO L226 Difference]: Without dead ends: 126 [2023-02-14 21:33:24,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=717, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 21:33:24,365 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 3 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:24,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 199 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:33:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-14 21:33:24,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2023-02-14 21:33:24,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 120 states have internal predecessors, (137), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:24,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 143 transitions. [2023-02-14 21:33:24,380 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 143 transitions. Word has length 208 [2023-02-14 21:33:24,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:24,381 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 143 transitions. [2023-02-14 21:33:24,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.735294117647059) internal successors, (93), 34 states have internal predecessors, (93), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:24,381 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 143 transitions. [2023-02-14 21:33:24,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2023-02-14 21:33:24,383 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:24,383 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 26, 26, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:24,390 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:24,588 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,SelfDestructingSolverStorable8 [2023-02-14 21:33:24,589 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:24,589 INFO L85 PathProgramCache]: Analyzing trace with hash 559440675, now seen corresponding path program 7 times [2023-02-14 21:33:24,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488505318] [2023-02-14 21:33:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:25,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-14 21:33:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:25,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2023-02-14 21:33:25,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:25,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2023-02-14 21:33:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-14 21:33:25,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:25,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488505318] [2023-02-14 21:33:25,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488505318] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:25,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001249934] [2023-02-14 21:33:25,461 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-14 21:33:25,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:25,462 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) [2023-02-14 21:33:25,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 21:33:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-14 21:33:25,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:25,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-14 21:33:25,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 3436 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-14 21:33:26,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001249934] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:26,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:26,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2023-02-14 21:33:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403433921] [2023-02-14 21:33:26,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:26,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-02-14 21:33:26,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-02-14 21:33:26,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 21:33:26,458 INFO L87 Difference]: Start difference. First operand 125 states and 143 transitions. Second operand has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:26,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:26,602 INFO L93 Difference]: Finished difference Result 251 states and 314 transitions. [2023-02-14 21:33:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-14 21:33:26,603 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 218 [2023-02-14 21:33:26,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:26,605 INFO L225 Difference]: With dead ends: 251 [2023-02-14 21:33:26,605 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 21:33:26,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2023-02-14 21:33:26,606 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:26,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 170 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:33:26,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 21:33:26,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2023-02-14 21:33:26,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0965909090909092) internal successors, (193), 176 states have internal predecessors, (193), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:26,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 199 transitions. [2023-02-14 21:33:26,617 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 199 transitions. Word has length 218 [2023-02-14 21:33:26,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:26,618 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 199 transitions. [2023-02-14 21:33:26,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.3684210526315788) internal successors, (135), 57 states have internal predecessors, (135), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:26,618 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 199 transitions. [2023-02-14 21:33:26,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2023-02-14 21:33:26,620 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:26,620 INFO L195 NwaCegarLoop]: trace histogram [54, 54, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:26,641 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:26,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 21:33:26,826 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1032547419, now seen corresponding path program 8 times [2023-02-14 21:33:26,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:26,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911179587] [2023-02-14 21:33:26,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:26,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:28,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-02-14 21:33:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:28,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2023-02-14 21:33:28,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:28,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 223 [2023-02-14 21:33:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-14 21:33:28,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911179587] [2023-02-14 21:33:28,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911179587] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:28,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704351419] [2023-02-14 21:33:28,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:33:28,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:28,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:28,928 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) [2023-02-14 21:33:28,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 21:33:29,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:33:29,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-14 21:33:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-14 21:33:29,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5676 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 2760 trivial. 0 not checked. [2023-02-14 21:33:30,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704351419] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:30,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:30,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 63 [2023-02-14 21:33:30,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654270509] [2023-02-14 21:33:30,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:30,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-14 21:33:30,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:30,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-14 21:33:30,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-02-14 21:33:30,537 INFO L87 Difference]: Start difference. First operand 181 states and 199 transitions. Second operand has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:30,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:30,639 INFO L93 Difference]: Finished difference Result 263 states and 304 transitions. [2023-02-14 21:33:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-14 21:33:30,639 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 274 [2023-02-14 21:33:30,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:30,640 INFO L225 Difference]: With dead ends: 263 [2023-02-14 21:33:30,640 INFO L226 Difference]: Without dead ends: 193 [2023-02-14 21:33:30,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 498 SyntacticMatches, 50 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1691 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2023-02-14 21:33:30,641 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:30,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 98 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:33:30,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-02-14 21:33:30,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2023-02-14 21:33:30,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0904255319148937) internal successors, (205), 188 states have internal predecessors, (205), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 211 transitions. [2023-02-14 21:33:30,645 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 211 transitions. Word has length 274 [2023-02-14 21:33:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:30,645 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 211 transitions. [2023-02-14 21:33:30,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.365079365079365) internal successors, (149), 63 states have internal predecessors, (149), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 21:33:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 211 transitions. [2023-02-14 21:33:30,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2023-02-14 21:33:30,647 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:30,647 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 42, 42, 42, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:30,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:30,861 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,SelfDestructingSolverStorable10 [2023-02-14 21:33:30,861 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:30,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash -33288217, now seen corresponding path program 9 times [2023-02-14 21:33:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:30,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045838326] [2023-02-14 21:33:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:30,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:31,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-14 21:33:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:31,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2023-02-14 21:33:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:31,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 235 [2023-02-14 21:33:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 1527 refuted. 0 times theorem prover too weak. 4833 trivial. 0 not checked. [2023-02-14 21:33:31,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045838326] [2023-02-14 21:33:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045838326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:31,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139355918] [2023-02-14 21:33:31,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:33:31,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:31,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:31,487 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) [2023-02-14 21:33:31,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 21:33:31,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-14 21:33:31,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:31,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 21:33:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:31,865 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 1242 proven. 36 refuted. 0 times theorem prover too weak. 5082 trivial. 0 not checked. [2023-02-14 21:33:31,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:31,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6360 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2023-02-14 21:33:31,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139355918] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:31,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:31,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2023-02-14 21:33:31,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570913529] [2023-02-14 21:33:31,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:31,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-14 21:33:31,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:31,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-14 21:33:31,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-02-14 21:33:31,981 INFO L87 Difference]: Start difference. First operand 193 states and 211 transitions. Second operand has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:32,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:32,037 INFO L93 Difference]: Finished difference Result 283 states and 331 transitions. [2023-02-14 21:33:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-14 21:33:32,038 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 286 [2023-02-14 21:33:32,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:32,038 INFO L225 Difference]: With dead ends: 283 [2023-02-14 21:33:32,038 INFO L226 Difference]: Without dead ends: 214 [2023-02-14 21:33:32,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2023-02-14 21:33:32,040 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:32,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 137 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-02-14 21:33:32,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2023-02-14 21:33:32,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 207 states have internal predecessors, (225), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 231 transitions. [2023-02-14 21:33:32,044 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 231 transitions. Word has length 286 [2023-02-14 21:33:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:32,044 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 231 transitions. [2023-02-14 21:33:32,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.2580645161290325) internal successors, (101), 31 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 231 transitions. [2023-02-14 21:33:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2023-02-14 21:33:32,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:32,047 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 45, 45, 45, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:32,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:32,252 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,SelfDestructingSolverStorable11 [2023-02-14 21:33:32,253 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:32,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:32,253 INFO L85 PathProgramCache]: Analyzing trace with hash -512401555, now seen corresponding path program 10 times [2023-02-14 21:33:32,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:32,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425264528] [2023-02-14 21:33:32,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-14 21:33:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:32,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2023-02-14 21:33:32,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:32,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2023-02-14 21:33:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 0 proven. 1748 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-14 21:33:32,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425264528] [2023-02-14 21:33:32,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425264528] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:32,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795839119] [2023-02-14 21:33:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:33:32,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:32,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:32,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:33:32,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 21:33:33,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:33:33,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:33:33,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 21:33:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:33:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-14 21:33:33,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:33:33,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6916 backedges. 1418 proven. 330 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-02-14 21:33:33,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795839119] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:33:33,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 21:33:33,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 34 [2023-02-14 21:33:33,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884375848] [2023-02-14 21:33:33,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 21:33:33,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-14 21:33:33,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:33:33,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-14 21:33:33,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 21:33:33,466 INFO L87 Difference]: Start difference. First operand 212 states and 231 transitions. Second operand has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:33:33,526 INFO L93 Difference]: Finished difference Result 351 states and 424 transitions. [2023-02-14 21:33:33,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-14 21:33:33,527 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 311 [2023-02-14 21:33:33,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:33:33,528 INFO L225 Difference]: With dead ends: 351 [2023-02-14 21:33:33,528 INFO L226 Difference]: Without dead ends: 263 [2023-02-14 21:33:33,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 612 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2023-02-14 21:33:33,529 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 97 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:33:33,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 154 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:33:33,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2023-02-14 21:33:33,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2023-02-14 21:33:33,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:33:33,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 299 transitions. [2023-02-14 21:33:33,534 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 299 transitions. Word has length 311 [2023-02-14 21:33:33,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:33:33,534 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 299 transitions. [2023-02-14 21:33:33,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6176470588235294) internal successors, (123), 34 states have internal predecessors, (123), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 21:33:33,535 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 299 transitions. [2023-02-14 21:33:33,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-02-14 21:33:33,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:33:33,539 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 96, 60, 60, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:33:33,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 21:33:33,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 21:33:33,746 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:33:33,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:33:33,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1295900265, now seen corresponding path program 11 times [2023-02-14 21:33:33,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:33:33,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807019036] [2023-02-14 21:33:33,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:33:33,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:33:33,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:34,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2023-02-14 21:33:34,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:35,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 226 [2023-02-14 21:33:35,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:35,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 359 [2023-02-14 21:33:35,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:33:35,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17779 backedges. 0 proven. 7800 refuted. 0 times theorem prover too weak. 9979 trivial. 0 not checked. [2023-02-14 21:33:35,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:33:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807019036] [2023-02-14 21:33:35,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807019036] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 21:33:35,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934575194] [2023-02-14 21:33:35,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:33:35,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:33:35,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:33:35,407 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:33:35,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process