./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s3lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 574ddb4e 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/array-fpi/s3lif.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 3aac75742402b60de8e734a48b2dd5180b95add96e084901e84c53f880aa300a --- Real Ultimate output --- This is Ultimate 0.2.2-?-574ddb4 [2023-02-18 12:50:29,024 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-18 12:50:29,026 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-18 12:50:29,042 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-18 12:50:29,043 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-18 12:50:29,043 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-18 12:50:29,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-18 12:50:29,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-18 12:50:29,047 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-18 12:50:29,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-18 12:50:29,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-18 12:50:29,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-18 12:50:29,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-18 12:50:29,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-18 12:50:29,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-18 12:50:29,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-18 12:50:29,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-18 12:50:29,059 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-18 12:50:29,061 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-18 12:50:29,062 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-18 12:50:29,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-18 12:50:29,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-18 12:50:29,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-18 12:50:29,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-18 12:50:29,074 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-18 12:50:29,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-18 12:50:29,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-18 12:50:29,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-18 12:50:29,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-18 12:50:29,078 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-18 12:50:29,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-18 12:50:29,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-18 12:50:29,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-18 12:50:29,080 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-18 12:50:29,081 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-18 12:50:29,082 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-18 12:50:29,082 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-18 12:50:29,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-18 12:50:29,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-18 12:50:29,084 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-18 12:50:29,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-18 12:50:29,086 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-18 12:50:29,110 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-18 12:50:29,110 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-18 12:50:29,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-18 12:50:29,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-18 12:50:29,111 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-18 12:50:29,111 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-18 12:50:29,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-18 12:50:29,113 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-18 12:50:29,113 INFO L138 SettingsManager]: * Use SBE=true [2023-02-18 12:50:29,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-18 12:50:29,114 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-18 12:50:29,115 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-18 12:50:29,115 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-18 12:50:29,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-18 12:50:29,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-18 12:50:29,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-18 12:50:29,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-18 12:50:29,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:50:29,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-18 12:50:29,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-18 12:50:29,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-18 12:50:29,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-18 12:50:29,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-18 12:50:29,116 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-18 12:50:29,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-18 12:50:29,117 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-18 12:50:29,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-18 12:50:29,117 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-18 12:50:29,117 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3aac75742402b60de8e734a48b2dd5180b95add96e084901e84c53f880aa300a [2023-02-18 12:50:29,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-18 12:50:29,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-18 12:50:29,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-18 12:50:29,284 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-18 12:50:29,284 INFO L275 PluginConnector]: CDTParser initialized [2023-02-18 12:50:29,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s3lif.c [2023-02-18 12:50:30,367 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-18 12:50:30,549 INFO L351 CDTParser]: Found 1 translation units. [2023-02-18 12:50:30,550 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s3lif.c [2023-02-18 12:50:30,555 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8550c0b8d/07de9957fb114c1c8c8c18ef02420b57/FLAGd87ebb21e [2023-02-18 12:50:30,567 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8550c0b8d/07de9957fb114c1c8c8c18ef02420b57 [2023-02-18 12:50:30,569 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-18 12:50:30,571 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-18 12:50:30,573 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-18 12:50:30,573 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-18 12:50:30,575 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-18 12:50:30,576 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d4dca4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30, skipping insertion in model container [2023-02-18 12:50:30,578 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,584 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-18 12:50:30,599 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-18 12:50:30,683 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/array-fpi/s3lif.c[588,601] [2023-02-18 12:50:30,695 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:50:30,700 INFO L203 MainTranslator]: Completed pre-run [2023-02-18 12:50:30,707 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/array-fpi/s3lif.c[588,601] [2023-02-18 12:50:30,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-18 12:50:30,720 INFO L208 MainTranslator]: Completed translation [2023-02-18 12:50:30,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30 WrapperNode [2023-02-18 12:50:30,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-18 12:50:30,722 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-18 12:50:30,722 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-18 12:50:30,723 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-18 12:50:30,727 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,740 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,758 INFO L138 Inliner]: procedures = 17, calls = 32, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 89 [2023-02-18 12:50:30,759 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-18 12:50:30,759 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-18 12:50:30,759 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-18 12:50:30,760 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-18 12:50:30,765 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,770 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,773 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-18 12:50:30,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-18 12:50:30,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-18 12:50:30,776 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-18 12:50:30,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (1/1) ... [2023-02-18 12:50:30,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-18 12:50:30,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:30,799 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) [2023-02-18 12:50:30,801 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 [2023-02-18 12:50:30,836 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-18 12:50:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-18 12:50:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-18 12:50:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-18 12:50:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-18 12:50:30,837 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-18 12:50:30,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-18 12:50:30,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-18 12:50:30,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-18 12:50:30,887 INFO L235 CfgBuilder]: Building ICFG [2023-02-18 12:50:30,889 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-18 12:50:31,044 INFO L276 CfgBuilder]: Performing block encoding [2023-02-18 12:50:31,048 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-18 12:50:31,049 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2023-02-18 12:50:31,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:50:31 BoogieIcfgContainer [2023-02-18 12:50:31,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-18 12:50:31,051 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-18 12:50:31,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-18 12:50:31,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-18 12:50:31,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.02 12:50:30" (1/3) ... [2023-02-18 12:50:31,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c8e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:50:31, skipping insertion in model container [2023-02-18 12:50:31,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.02 12:50:30" (2/3) ... [2023-02-18 12:50:31,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c8e35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 12:50:31, skipping insertion in model container [2023-02-18 12:50:31,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 12:50:31" (3/3) ... [2023-02-18 12:50:31,070 INFO L112 eAbstractionObserver]: Analyzing ICFG s3lif.c [2023-02-18 12:50:31,081 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-18 12:50:31,081 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-18 12:50:31,157 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-18 12:50:31,161 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;@42620b8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-18 12:50:31,162 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-18 12:50:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:31,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 12:50:31,174 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:31,175 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:31,175 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:31,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:31,179 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2023-02-18 12:50:31,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:31,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246689001] [2023-02-18 12:50:31,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:31,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:31,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:31,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:31,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:31,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246689001] [2023-02-18 12:50:31,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246689001] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:50:31,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:50:31,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-18 12:50:31,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618594058] [2023-02-18 12:50:31,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:50:31,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-18 12:50:31,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:31,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-18 12:50:31,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:50:31,309 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:31,318 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-02-18 12:50:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-18 12:50:31,326 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 12:50:31,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:31,330 INFO L225 Difference]: With dead ends: 40 [2023-02-18 12:50:31,331 INFO L226 Difference]: Without dead ends: 18 [2023-02-18 12:50:31,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-18 12:50:31,336 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:31,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:50:31,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-18 12:50:31,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-18 12:50:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-18 12:50:31,357 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2023-02-18 12:50:31,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:31,357 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-18 12:50:31,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:31,357 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-18 12:50:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-18 12:50:31,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:31,358 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:31,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-18 12:50:31,359 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:31,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2023-02-18 12:50:31,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:31,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973198537] [2023-02-18 12:50:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:31,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:31,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973198537] [2023-02-18 12:50:31,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973198537] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-18 12:50:31,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-18 12:50:31,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-18 12:50:31,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611714668] [2023-02-18 12:50:31,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-18 12:50:31,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-18 12:50:31,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:31,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-18 12:50:31,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 12:50:31,501 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:31,547 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2023-02-18 12:50:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-18 12:50:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-18 12:50:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:31,548 INFO L225 Difference]: With dead ends: 36 [2023-02-18 12:50:31,549 INFO L226 Difference]: Without dead ends: 25 [2023-02-18 12:50:31,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-18 12:50:31,550 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:31,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 11 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:50:31,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-18 12:50:31,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2023-02-18 12:50:31,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:31,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-02-18 12:50:31,554 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2023-02-18 12:50:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:31,554 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-02-18 12:50:31,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:31,555 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-02-18 12:50:31,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 12:50:31,555 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:31,555 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-18 12:50:31,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:31,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2023-02-18 12:50:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:31,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298823136] [2023-02-18 12:50:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:32,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:32,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:32,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298823136] [2023-02-18 12:50:32,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298823136] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:32,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890243130] [2023-02-18 12:50:32,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:32,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:32,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:32,133 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) [2023-02-18 12:50:32,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-18 12:50:32,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-18 12:50:32,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:32,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 12:50:32,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:50:32,327 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 12:50:32,390 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2023-02-18 12:50:32,434 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 29 [2023-02-18 12:50:32,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2023-02-18 12:50:32,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:32,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:32,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:32,689 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 50 [2023-02-18 12:50:32,747 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:32,747 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 84 [2023-02-18 12:50:32,749 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:50:32,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 66 [2023-02-18 12:50:32,754 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-02-18 12:50:32,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2023-02-18 12:50:32,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:32,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890243130] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:32,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:32,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 31 [2023-02-18 12:50:32,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584245307] [2023-02-18 12:50:32,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:32,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-18 12:50:32,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-18 12:50:32,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2023-02-18 12:50:32,787 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:33,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:33,336 INFO L93 Difference]: Finished difference Result 53 states and 63 transitions. [2023-02-18 12:50:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-18 12:50:33,337 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 12:50:33,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:33,338 INFO L225 Difference]: With dead ends: 53 [2023-02-18 12:50:33,338 INFO L226 Difference]: Without dead ends: 49 [2023-02-18 12:50:33,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 12:50:33,340 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:33,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 68 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-18 12:50:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-02-18 12:50:33,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 31. [2023-02-18 12:50:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:33,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-02-18 12:50:33,348 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 20 [2023-02-18 12:50:33,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:33,349 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-02-18 12:50:33,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6129032258064515) internal successors, (50), 31 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:33,349 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-02-18 12:50:33,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-18 12:50:33,350 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:33,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:33,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-18 12:50:33,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:33,556 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:33,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:33,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2023-02-18 12:50:33,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:33,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115018181] [2023-02-18 12:50:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:33,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:33,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:33,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115018181] [2023-02-18 12:50:33,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115018181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:33,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616210133] [2023-02-18 12:50:33,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:33,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:33,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:33,709 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) [2023-02-18 12:50:33,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-18 12:50:33,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 13 conjunts are in the unsatisfiable core [2023-02-18 12:50:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:33,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 12:50:33,776 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2023-02-18 12:50:33,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:33,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:33,795 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-02-18 12:50:33,796 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 28 [2023-02-18 12:50:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:33,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616210133] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:33,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:33,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-18 12:50:33,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280579326] [2023-02-18 12:50:33,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:33,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-18 12:50:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:33,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-18 12:50:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-18 12:50:33,804 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:33,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:33,847 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2023-02-18 12:50:33,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-18 12:50:33,848 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-18 12:50:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:33,850 INFO L225 Difference]: With dead ends: 48 [2023-02-18 12:50:33,850 INFO L226 Difference]: Without dead ends: 37 [2023-02-18 12:50:33,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 32 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-02-18 12:50:33,854 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:33,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 50 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-18 12:50:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-18 12:50:33,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-02-18 12:50:33,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.21875) internal successors, (39), 32 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:33,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-02-18 12:50:33,867 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 20 [2023-02-18 12:50:33,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:33,868 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-02-18 12:50:33,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-02-18 12:50:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 12:50:33,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:33,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:33,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-18 12:50:34,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-18 12:50:34,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:34,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2023-02-18 12:50:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:34,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466659398] [2023-02-18 12:50:34,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:34,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:34,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466659398] [2023-02-18 12:50:34,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466659398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:34,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69285641] [2023-02-18 12:50:34,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-18 12:50:34,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:34,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:34,112 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) [2023-02-18 12:50:34,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-18 12:50:34,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-18 12:50:34,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:50:34,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 12:50:34,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:34,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:34,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:34,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:34,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69285641] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:34,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:34,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 12:50:34,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624777197] [2023-02-18 12:50:34,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:34,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 12:50:34,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:34,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 12:50:34,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-18 12:50:34,188 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:34,257 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2023-02-18 12:50:34,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 12:50:34,258 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 12:50:34,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:34,258 INFO L225 Difference]: With dead ends: 70 [2023-02-18 12:50:34,258 INFO L226 Difference]: Without dead ends: 44 [2023-02-18 12:50:34,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-18 12:50:34,259 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 53 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:34,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 35 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:50:34,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-18 12:50:34,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2023-02-18 12:50:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-02-18 12:50:34,264 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2023-02-18 12:50:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:34,264 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-02-18 12:50:34,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-02-18 12:50:34,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-02-18 12:50:34,265 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:34,265 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:34,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-18 12:50:34,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:34,470 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:34,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:34,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2023-02-18 12:50:34,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:34,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133019654] [2023-02-18 12:50:34,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:34,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:34,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:34,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:34,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133019654] [2023-02-18 12:50:34,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133019654] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:34,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258278783] [2023-02-18 12:50:34,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-18 12:50:34,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:34,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:34,529 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) [2023-02-18 12:50:34,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-18 12:50:34,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-18 12:50:34,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:50:34,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-18 12:50:34,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:34,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:34,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-18 12:50:34,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258278783] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:34,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:34,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-18 12:50:34,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855017125] [2023-02-18 12:50:34,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:34,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-18 12:50:34,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:34,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-18 12:50:34,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-18 12:50:34,654 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:34,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:34,724 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-02-18 12:50:34,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-18 12:50:34,725 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-02-18 12:50:34,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:34,725 INFO L225 Difference]: With dead ends: 39 [2023-02-18 12:50:34,725 INFO L226 Difference]: Without dead ends: 31 [2023-02-18 12:50:34,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-02-18 12:50:34,726 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 35 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:34,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 27 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:50:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-18 12:50:34,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-02-18 12:50:34,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-02-18 12:50:34,730 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2023-02-18 12:50:34,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:34,730 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-02-18 12:50:34,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:34,730 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-02-18 12:50:34,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 12:50:34,731 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:34,731 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:34,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-18 12:50:34,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:34,938 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:34,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:34,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2023-02-18 12:50:34,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:34,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303736082] [2023-02-18 12:50:34,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:34,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:35,572 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:35,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:35,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303736082] [2023-02-18 12:50:35,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303736082] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:35,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080901150] [2023-02-18 12:50:35,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-18 12:50:35,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:35,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:35,574 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) [2023-02-18 12:50:35,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-18 12:50:35,624 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-18 12:50:35,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:50:35,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-18 12:50:35,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:35,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:50:35,640 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 12:50:35,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 12:50:35,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 12:50:35,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 27 [2023-02-18 12:50:35,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2023-02-18 12:50:35,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:50:35,854 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:50:35,855 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 43 [2023-02-18 12:50:35,910 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 47 [2023-02-18 12:50:35,945 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 82 treesize of output 40 [2023-02-18 12:50:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:35,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:36,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:36,556 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 150 [2023-02-18 12:50:36,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:36,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080901150] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:36,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:36,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 18] total 49 [2023-02-18 12:50:36,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768751668] [2023-02-18 12:50:36,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:36,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-18 12:50:36,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-18 12:50:36,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=361, Invalid=1991, Unknown=0, NotChecked=0, Total=2352 [2023-02-18 12:50:36,763 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:41,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:41,654 INFO L93 Difference]: Finished difference Result 99 states and 121 transitions. [2023-02-18 12:50:41,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-18 12:50:41,654 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 12:50:41,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:41,655 INFO L225 Difference]: With dead ends: 99 [2023-02-18 12:50:41,655 INFO L226 Difference]: Without dead ends: 85 [2023-02-18 12:50:41,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2548 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1327, Invalid=7045, Unknown=0, NotChecked=0, Total=8372 [2023-02-18 12:50:41,658 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 104 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 182 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:41,658 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 132 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 785 Invalid, 2 Unknown, 0 Unchecked, 1.5s Time] [2023-02-18 12:50:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-02-18 12:50:41,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 55. [2023-02-18 12:50:41,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2777777777777777) internal successors, (69), 54 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 69 transitions. [2023-02-18 12:50:41,679 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 69 transitions. Word has length 27 [2023-02-18 12:50:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:41,679 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 69 transitions. [2023-02-18 12:50:41,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 49 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:41,679 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 69 transitions. [2023-02-18 12:50:41,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-18 12:50:41,680 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:41,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:41,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-18 12:50:41,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:41,885 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:41,886 INFO L85 PathProgramCache]: Analyzing trace with hash -774428629, now seen corresponding path program 1 times [2023-02-18 12:50:41,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:41,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863922818] [2023-02-18 12:50:41,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:41,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 12:50:42,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863922818] [2023-02-18 12:50:42,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863922818] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:42,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139103070] [2023-02-18 12:50:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:42,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:42,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:42,033 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) [2023-02-18 12:50:42,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-18 12:50:42,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:42,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-18 12:50:42,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:42,121 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-18 12:50:42,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:50:42,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 45 [2023-02-18 12:50:42,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 64 [2023-02-18 12:50:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 12:50:42,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:42,214 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2023-02-18 12:50:42,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 32 [2023-02-18 12:50:42,231 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 12:50:42,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139103070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:42,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:42,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2023-02-18 12:50:42,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650637773] [2023-02-18 12:50:42,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:42,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 12:50:42,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:42,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 12:50:42,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-02-18 12:50:42,234 INFO L87 Difference]: Start difference. First operand 55 states and 69 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:42,350 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2023-02-18 12:50:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 12:50:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-02-18 12:50:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:42,351 INFO L225 Difference]: With dead ends: 79 [2023-02-18 12:50:42,351 INFO L226 Difference]: Without dead ends: 55 [2023-02-18 12:50:42,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 11 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-02-18 12:50:42,352 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:42,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 70 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:50:42,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-18 12:50:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 50. [2023-02-18 12:50:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 49 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:42,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2023-02-18 12:50:42,360 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 27 [2023-02-18 12:50:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:42,360 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2023-02-18 12:50:42,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:42,361 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2023-02-18 12:50:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 12:50:42,361 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:42,361 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:42,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-18 12:50:42,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:42,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:42,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:42,573 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2023-02-18 12:50:42,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:42,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076129347] [2023-02-18 12:50:42,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:42,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:42,621 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:50:42,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:42,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076129347] [2023-02-18 12:50:42,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076129347] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:42,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274098631] [2023-02-18 12:50:42,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-18 12:50:42,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:42,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:42,633 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) [2023-02-18 12:50:42,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-18 12:50:42,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-18 12:50:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:50:42,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 12:50:42,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:42,756 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:50:42,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:42,787 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:50:42,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274098631] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:42,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:42,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-18 12:50:42,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228706295] [2023-02-18 12:50:42,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:42,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 12:50:42,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:42,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 12:50:42,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-18 12:50:42,789 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:42,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:42,900 INFO L93 Difference]: Finished difference Result 91 states and 104 transitions. [2023-02-18 12:50:42,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-18 12:50:42,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 12:50:42,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:42,901 INFO L225 Difference]: With dead ends: 91 [2023-02-18 12:50:42,901 INFO L226 Difference]: Without dead ends: 53 [2023-02-18 12:50:42,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-18 12:50:42,902 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:42,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 26 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:50:42,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-18 12:50:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2023-02-18 12:50:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.131578947368421) internal successors, (43), 38 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-02-18 12:50:42,909 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 29 [2023-02-18 12:50:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:42,909 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-02-18 12:50:42,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:42,909 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-02-18 12:50:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-18 12:50:42,910 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:42,910 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-18 12:50:42,934 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-18 12:50:43,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:43,117 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:43,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1292373713, now seen corresponding path program 6 times [2023-02-18 12:50:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:43,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909766572] [2023-02-18 12:50:43,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:43,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:43,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-18 12:50:43,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909766572] [2023-02-18 12:50:43,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909766572] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50197734] [2023-02-18 12:50:43,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-18 12:50:43,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:43,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:43,183 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) [2023-02-18 12:50:43,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-18 12:50:43,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-18 12:50:43,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-18 12:50:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-18 12:50:43,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:50:43,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-18 12:50:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-18 12:50:43,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50197734] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-18 12:50:43,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-18 12:50:43,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-18 12:50:43,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792060745] [2023-02-18 12:50:43,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-18 12:50:43,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-18 12:50:43,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-18 12:50:43,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-18 12:50:43,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-18 12:50:43,294 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:43,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-18 12:50:43,388 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-02-18 12:50:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-18 12:50:43,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-18 12:50:43,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-18 12:50:43,388 INFO L225 Difference]: With dead ends: 48 [2023-02-18 12:50:43,388 INFO L226 Difference]: Without dead ends: 38 [2023-02-18 12:50:43,389 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2023-02-18 12:50:43,389 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-18 12:50:43,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 24 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-18 12:50:43,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-18 12:50:43,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2023-02-18 12:50:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:43,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-02-18 12:50:43,395 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2023-02-18 12:50:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-18 12:50:43,395 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-02-18 12:50:43,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-18 12:50:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-02-18 12:50:43,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-02-18 12:50:43,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-18 12:50:43,396 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] [2023-02-18 12:50:43,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-18 12:50:43,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-18 12:50:43,601 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-18 12:50:43,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-18 12:50:43,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 7 times [2023-02-18 12:50:43,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-18 12:50:43,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875045147] [2023-02-18 12:50:43,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-18 12:50:43,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-18 12:50:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:44,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-18 12:50:44,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-18 12:50:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875045147] [2023-02-18 12:50:44,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875045147] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-18 12:50:44,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981645765] [2023-02-18 12:50:44,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-18 12:50:44,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-18 12:50:44,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-18 12:50:44,739 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) [2023-02-18 12:50:44,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-18 12:50:44,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-18 12:50:44,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-18 12:50:44,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-18 12:50:44,854 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-02-18 12:50:44,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-18 12:50:44,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 12:50:44,950 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 12:50:45,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-02-18 12:50:45,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:45,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 102 [2023-02-18 12:50:45,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:50:45,353 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:45,353 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 206 treesize of output 246 [2023-02-18 12:50:45,833 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:45,834 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 2573 treesize of output 2284 [2023-02-18 12:50:49,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:50:49,351 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:50:49,352 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:49,352 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 51546 treesize of output 49637 [2023-02-18 12:50:51,038 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:50:51,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:50:51,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:50:51,040 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-18 12:50:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-18 12:50:51,042 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-18 12:50:51,042 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 46414 treesize of output 46499