./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_o100.c --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/recursive-simple/id_o100.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a9f3959f9eef72d5f7423aa1eb092ce144135b5ae33d5bb31037a0c7e99b1293 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-15 00:51:34,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 00:51:34,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 00:51:34,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 00:51:34,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 00:51:34,106 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 00:51:34,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 00:51:34,111 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 00:51:34,112 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 00:51:34,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 00:51:34,118 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 00:51:34,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 00:51:34,120 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 00:51:34,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 00:51:34,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 00:51:34,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 00:51:34,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 00:51:34,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 00:51:34,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 00:51:34,129 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 00:51:34,130 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 00:51:34,130 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 00:51:34,131 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 00:51:34,132 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 00:51:34,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 00:51:34,134 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 00:51:34,134 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 00:51:34,135 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 00:51:34,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 00:51:34,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 00:51:34,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 00:51:34,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 00:51:34,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 00:51:34,137 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 00:51:34,138 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 00:51:34,138 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 00:51:34,138 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 00:51:34,139 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 00:51:34,139 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 00:51:34,139 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 00:51:34,140 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 00:51:34,141 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 00:51:34,169 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 00:51:34,169 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 00:51:34,169 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 00:51:34,170 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 00:51:34,170 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 00:51:34,170 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 00:51:34,171 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 00:51:34,171 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 00:51:34,171 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 00:51:34,171 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 00:51:34,171 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 00:51:34,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 00:51:34,172 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 00:51:34,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 00:51:34,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 00:51:34,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 00:51:34,172 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 00:51:34,172 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 00:51:34,172 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 00:51:34,173 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 00:51:34,173 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 00:51:34,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 00:51:34,173 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 00:51:34,173 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 00:51:34,173 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:51:34,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 00:51:34,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 00:51:34,174 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 00:51:34,174 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 00:51:34,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 00:51:34,174 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 00:51:34,174 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 00:51:34,175 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 00:51:34,175 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 00:51:34,175 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 00:51:34,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9f3959f9eef72d5f7423aa1eb092ce144135b5ae33d5bb31037a0c7e99b1293 [2023-02-15 00:51:34,353 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 00:51:34,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 00:51:34,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 00:51:34,371 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 00:51:34,371 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 00:51:34,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_o100.c [2023-02-15 00:51:35,427 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 00:51:35,523 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 00:51:35,524 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_o100.c [2023-02-15 00:51:35,529 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7fb8d58d/452add8603cd455f8927c861191a7132/FLAGa587fdc7c [2023-02-15 00:51:35,539 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7fb8d58d/452add8603cd455f8927c861191a7132 [2023-02-15 00:51:35,540 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 00:51:35,541 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 00:51:35,542 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 00:51:35,542 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 00:51:35,544 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 00:51:35,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e6d6b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35, skipping insertion in model container [2023-02-15 00:51:35,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,549 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 00:51:35,557 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 00:51:35,632 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/recursive-simple/id_o100.c[518,531] [2023-02-15 00:51:35,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:51:35,641 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 00:51:35,651 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/recursive-simple/id_o100.c[518,531] [2023-02-15 00:51:35,651 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 00:51:35,658 INFO L208 MainTranslator]: Completed translation [2023-02-15 00:51:35,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35 WrapperNode [2023-02-15 00:51:35,659 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 00:51:35,660 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 00:51:35,660 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 00:51:35,660 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 00:51:35,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,667 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,675 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 19 [2023-02-15 00:51:35,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 00:51:35,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 00:51:35,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 00:51:35,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 00:51:35,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,681 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,681 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,682 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,684 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,684 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,685 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 00:51:35,685 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 00:51:35,685 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 00:51:35,685 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 00:51:35,686 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (1/1) ... [2023-02-15 00:51:35,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 00:51:35,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:35,706 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 00:51:35,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 00:51:35,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 00:51:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 00:51:35,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 00:51:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 00:51:35,733 INFO L130 BoogieDeclarations]: Found specification of procedure id [2023-02-15 00:51:35,733 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2023-02-15 00:51:35,771 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 00:51:35,772 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 00:51:35,877 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 00:51:35,882 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 00:51:35,882 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 00:51:35,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:51:35 BoogieIcfgContainer [2023-02-15 00:51:35,884 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 00:51:35,885 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 00:51:35,885 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 00:51:35,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 00:51:35,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 12:51:35" (1/3) ... [2023-02-15 00:51:35,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a011761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:51:35, skipping insertion in model container [2023-02-15 00:51:35,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 12:51:35" (2/3) ... [2023-02-15 00:51:35,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a011761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 12:51:35, skipping insertion in model container [2023-02-15 00:51:35,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 12:51:35" (3/3) ... [2023-02-15 00:51:35,889 INFO L112 eAbstractionObserver]: Analyzing ICFG id_o100.c [2023-02-15 00:51:35,900 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 00:51:35,900 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 00:51:35,962 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 00:51:35,967 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;@3d334aa5, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 00:51:35,967 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 00:51:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-15 00:51:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-15 00:51:35,976 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:35,976 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:35,977 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:35,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:35,980 INFO L85 PathProgramCache]: Analyzing trace with hash -358017204, now seen corresponding path program 1 times [2023-02-15 00:51:35,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:35,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50779757] [2023-02-15 00:51:35,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:35,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:36,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:36,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 00:51:36,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:36,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50779757] [2023-02-15 00:51:36,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50779757] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 00:51:36,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 00:51:36,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 00:51:36,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845784742] [2023-02-15 00:51:36,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 00:51:36,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 00:51:36,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:36,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 00:51:36,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:51:36,302 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 00:51:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:36,334 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2023-02-15 00:51:36,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 00:51:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-02-15 00:51:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:36,342 INFO L225 Difference]: With dead ends: 28 [2023-02-15 00:51:36,342 INFO L226 Difference]: Without dead ends: 15 [2023-02-15 00:51:36,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 00:51:36,348 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:51:36,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 53 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:51:36,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-15 00:51:36,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-02-15 00:51:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-15 00:51:36,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-02-15 00:51:36,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-02-15 00:51:36,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:36,374 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-02-15 00:51:36,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 00:51:36,374 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-02-15 00:51:36,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-15 00:51:36,375 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:36,375 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 00:51:36,376 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 679465686, now seen corresponding path program 1 times [2023-02-15 00:51:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:36,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944251248] [2023-02-15 00:51:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:36,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:51:36,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:36,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944251248] [2023-02-15 00:51:36,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944251248] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799643158] [2023-02-15 00:51:36,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:36,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:36,607 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:36,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 00:51:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:36,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 00:51:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:36,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:51:36,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:36,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 00:51:36,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799643158] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:36,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:36,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 00:51:36,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997280643] [2023-02-15 00:51:36,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:36,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 00:51:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 00:51:36,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 00:51:36,860 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 00:51:36,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:36,891 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-02-15 00:51:36,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 00:51:36,892 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 16 [2023-02-15 00:51:36,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:36,892 INFO L225 Difference]: With dead ends: 27 [2023-02-15 00:51:36,892 INFO L226 Difference]: Without dead ends: 21 [2023-02-15 00:51:36,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2023-02-15 00:51:36,894 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 00:51:36,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 95 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 00:51:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-02-15 00:51:36,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-02-15 00:51:36,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-15 00:51:36,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-15 00:51:36,898 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2023-02-15 00:51:36,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:36,898 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-15 00:51:36,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 9 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-02-15 00:51:36,899 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-15 00:51:36,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-15 00:51:36,900 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:36,900 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:36,906 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 00:51:37,105 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 [2023-02-15 00:51:37,105 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:37,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:37,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1769866774, now seen corresponding path program 2 times [2023-02-15 00:51:37,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:37,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536126116] [2023-02-15 00:51:37,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:37,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:37,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:51:37,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:37,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536126116] [2023-02-15 00:51:37,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536126116] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:37,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646911626] [2023-02-15 00:51:37,456 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 00:51:37,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:37,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:37,471 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:37,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 00:51:37,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 00:51:37,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:51:37,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-15 00:51:37,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:51:37,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:37,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-15 00:51:37,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646911626] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:37,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:37,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2023-02-15 00:51:37,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903127063] [2023-02-15 00:51:37,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:37,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-15 00:51:37,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:37,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-15 00:51:37,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-02-15 00:51:37,785 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 00:51:37,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:37,924 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-02-15 00:51:37,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-15 00:51:37,925 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) Word has length 28 [2023-02-15 00:51:37,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:37,925 INFO L225 Difference]: With dead ends: 39 [2023-02-15 00:51:37,925 INFO L226 Difference]: Without dead ends: 33 [2023-02-15 00:51:37,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-02-15 00:51:37,926 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:51:37,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 183 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:51:37,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-02-15 00:51:37,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-02-15 00:51:37,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-02-15 00:51:37,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-15 00:51:37,931 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2023-02-15 00:51:37,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:37,931 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-15 00:51:37,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 13 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (8), 8 states have call predecessors, (8), 1 states have call successors, (8) [2023-02-15 00:51:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-15 00:51:37,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-15 00:51:37,932 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:37,932 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:37,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 00:51:38,136 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 [2023-02-15 00:51:38,137 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:38,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:38,137 INFO L85 PathProgramCache]: Analyzing trace with hash -626238314, now seen corresponding path program 3 times [2023-02-15 00:51:38,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:38,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140803043] [2023-02-15 00:51:38,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:38,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 00:51:38,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:38,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140803043] [2023-02-15 00:51:38,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140803043] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:38,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320831736] [2023-02-15 00:51:38,593 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 00:51:38,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:38,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:38,610 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:38,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 00:51:38,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 00:51:38,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:51:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-15 00:51:38,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 00:51:38,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:39,442 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-02-15 00:51:39,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320831736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:39,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:39,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2023-02-15 00:51:39,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189942965] [2023-02-15 00:51:39,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:39,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-15 00:51:39,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:39,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-15 00:51:39,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2023-02-15 00:51:39,445 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-15 00:51:41,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:51:41,649 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2023-02-15 00:51:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-15 00:51:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) Word has length 52 [2023-02-15 00:51:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:51:41,651 INFO L225 Difference]: With dead ends: 63 [2023-02-15 00:51:41,651 INFO L226 Difference]: Without dead ends: 57 [2023-02-15 00:51:41,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=386, Invalid=1966, Unknown=0, NotChecked=0, Total=2352 [2023-02-15 00:51:41,653 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 00:51:41,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 00:51:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-15 00:51:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-15 00:51:41,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2023-02-15 00:51:41,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-15 00:51:41,667 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 52 [2023-02-15 00:51:41,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:51:41,668 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-15 00:51:41,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 21 states have internal predecessors, (43), 1 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (16), 16 states have call predecessors, (16), 1 states have call successors, (16) [2023-02-15 00:51:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-15 00:51:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-15 00:51:41,675 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:51:41,675 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:51:41,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 00:51:41,881 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 [2023-02-15 00:51:41,881 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:51:41,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:51:41,882 INFO L85 PathProgramCache]: Analyzing trace with hash 415287702, now seen corresponding path program 4 times [2023-02-15 00:51:41,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:51:41,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266347037] [2023-02-15 00:51:41,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:51:41,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:51:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:42,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:51:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:51:43,635 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 00:51:43,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:51:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266347037] [2023-02-15 00:51:43,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266347037] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:51:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724691146] [2023-02-15 00:51:43,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 00:51:43,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:51:43,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:51:43,636 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:51:43,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 00:51:43,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 00:51:43,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:51:43,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-15 00:51:43,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:51:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 00:51:43,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:51:45,976 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2023-02-15 00:51:45,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724691146] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:51:45,977 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:51:45,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2023-02-15 00:51:45,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530335261] [2023-02-15 00:51:45,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:51:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2023-02-15 00:51:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:51:45,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2023-02-15 00:51:45,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=620, Invalid=4072, Unknown=0, NotChecked=0, Total=4692 [2023-02-15 00:51:45,985 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-15 00:52:03,165 WARN L233 SmtUtils]: Spent 12.57s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:52:25,879 WARN L233 SmtUtils]: Spent 15.95s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:52:40,881 WARN L233 SmtUtils]: Spent 10.50s on a formula simplification that was a NOOP. DAG size: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:52:57,946 WARN L233 SmtUtils]: Spent 11.50s on a formula simplification that was a NOOP. DAG size: 72 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:53:09,215 WARN L233 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 69 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:53:24,314 WARN L233 SmtUtils]: Spent 11.36s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:53:41,260 WARN L233 SmtUtils]: Spent 7.93s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 00:54:11,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 00:54:11,023 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2023-02-15 00:54:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-15 00:54:11,025 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) Word has length 100 [2023-02-15 00:54:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 00:54:11,028 INFO L225 Difference]: With dead ends: 111 [2023-02-15 00:54:11,028 INFO L226 Difference]: Without dead ends: 105 [2023-02-15 00:54:11,031 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 146.1s TimeCoverageRelationStatistics Valid=1530, Invalid=7781, Unknown=1, NotChecked=0, Total=9312 [2023-02-15 00:54:11,038 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1129 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-15 00:54:11,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 985 Invalid, 1129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1129 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-15 00:54:11,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-02-15 00:54:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-02-15 00:54:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 71 states have internal predecessors, (71), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2023-02-15 00:54:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-15 00:54:11,049 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 100 [2023-02-15 00:54:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 00:54:11,050 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-15 00:54:11,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 37 states have internal predecessors, (75), 1 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (32), 32 states have call predecessors, (32), 1 states have call successors, (32) [2023-02-15 00:54:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-15 00:54:11,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-15 00:54:11,056 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 00:54:11,056 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 00:54:11,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 00:54:11,260 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 [2023-02-15 00:54:11,261 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 00:54:11,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 00:54:11,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1665704854, now seen corresponding path program 5 times [2023-02-15 00:54:11,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 00:54:11,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978490600] [2023-02-15 00:54:11,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 00:54:11,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 00:54:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:11,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:12,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:12,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:12,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:12,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:12,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:13,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:13,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:13,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:13,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:13,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:13,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:14,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:14,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:14,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:14,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:14,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:14,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:15,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:16,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:16,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-15 00:54:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 00:54:17,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-15 00:54:17,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 00:54:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978490600] [2023-02-15 00:54:17,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978490600] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 00:54:17,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282116585] [2023-02-15 00:54:17,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 00:54:17,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 00:54:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 00:54:17,561 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 00:54:17,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 00:54:28,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-02-15 00:54:28,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 00:54:28,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 132 conjunts are in the unsatisfiable core [2023-02-15 00:54:28,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 00:54:28,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-15 00:54:28,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 00:54:36,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2023-02-15 00:54:36,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282116585] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 00:54:36,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 00:54:36,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 133 [2023-02-15 00:54:36,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313787377] [2023-02-15 00:54:36,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 00:54:36,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-02-15 00:54:36,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 00:54:36,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-02-15 00:54:36,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2252, Invalid=15304, Unknown=0, NotChecked=0, Total=17556 [2023-02-15 00:54:36,867 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 133 states, 133 states have (on average 1.0451127819548873) internal successors, (139), 69 states have internal predecessors, (139), 1 states have call successors, (2), 1 states have call predecessors, (2), 64 states have return successors, (64), 64 states have call predecessors, (64), 1 states have call successors, (64)