./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-crafted/zero_sum3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c 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-crafted/zero_sum3.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 d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 19:43:21,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 19:43:21,997 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 19:43:22,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 19:43:22,031 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 19:43:22,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 19:43:22,036 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 19:43:22,038 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 19:43:22,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 19:43:22,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 19:43:22,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 19:43:22,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 19:43:22,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 19:43:22,047 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 19:43:22,048 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 19:43:22,049 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 19:43:22,050 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 19:43:22,051 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 19:43:22,051 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 19:43:22,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 19:43:22,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 19:43:22,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 19:43:22,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 19:43:22,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 19:43:22,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 19:43:22,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 19:43:22,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 19:43:22,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 19:43:22,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 19:43:22,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 19:43:22,067 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 19:43:22,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 19:43:22,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 19:43:22,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 19:43:22,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 19:43:22,070 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 19:43:22,070 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 19:43:22,071 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 19:43:22,071 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 19:43:22,072 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 19:43:22,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 19:43:22,073 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 19:43:22,096 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 19:43:22,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 19:43:22,097 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 19:43:22,097 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 19:43:22,097 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 19:43:22,098 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 19:43:22,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 19:43:22,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 19:43:22,098 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 19:43:22,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 19:43:22,099 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 19:43:22,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 19:43:22,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 19:43:22,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 19:43:22,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 19:43:22,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 19:43:22,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 19:43:22,100 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 19:43:22,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 19:43:22,100 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 19:43:22,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 19:43:22,100 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 19:43:22,101 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 19:43:22,101 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 19:43:22,101 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 19:43:22,101 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 19:43:22,101 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 19:43:22,101 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 19:43:22,101 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 19:43:22,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 19:43:22,102 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 19:43:22,102 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 19:43:22,102 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 19:43:22,102 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 19:43:22,102 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 19:43:22,102 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3267df59902b667587c98ecbe021c99cc3d2a5e5866fbd08ee1fb3133370aa4 [2023-02-17 19:43:22,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 19:43:22,368 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 19:43:22,370 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 19:43:22,370 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 19:43:22,371 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 19:43:22,372 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-crafted/zero_sum3.c [2023-02-17 19:43:23,437 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 19:43:23,581 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 19:43:23,582 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-crafted/zero_sum3.c [2023-02-17 19:43:23,586 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec520a423/1e574380b48e45a89dc83cb21dcaf54c/FLAGe38a05f49 [2023-02-17 19:43:23,596 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec520a423/1e574380b48e45a89dc83cb21dcaf54c [2023-02-17 19:43:23,598 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 19:43:23,599 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 19:43:23,599 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 19:43:23,600 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 19:43:23,602 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 19:43:23,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,603 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73f0f352 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23, skipping insertion in model container [2023-02-17 19:43:23,603 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,608 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 19:43:23,619 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 19:43:23,717 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-crafted/zero_sum3.c[400,413] [2023-02-17 19:43:23,738 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 19:43:23,746 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 19:43:23,755 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-crafted/zero_sum3.c[400,413] [2023-02-17 19:43:23,760 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 19:43:23,778 INFO L208 MainTranslator]: Completed translation [2023-02-17 19:43:23,779 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23 WrapperNode [2023-02-17 19:43:23,779 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 19:43:23,780 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 19:43:23,780 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 19:43:23,781 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 19:43:23,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,819 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,843 INFO L138 Inliner]: procedures = 15, calls = 17, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 105 [2023-02-17 19:43:23,844 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 19:43:23,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 19:43:23,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 19:43:23,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 19:43:23,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,866 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,880 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,883 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,884 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,884 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 19:43:23,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 19:43:23,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 19:43:23,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 19:43:23,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (1/1) ... [2023-02-17 19:43:23,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 19:43:23,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:43:23,913 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) [2023-02-17 19:43:23,918 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 [2023-02-17 19:43:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 19:43:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 19:43:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-17 19:43:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 19:43:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 19:43:23,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 19:43:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 19:43:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-17 19:43:23,988 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 19:43:23,990 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 19:43:24,102 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 19:43:24,107 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 19:43:24,107 INFO L300 CfgBuilder]: Removed 7 assume(true) statements. [2023-02-17 19:43:24,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:43:24 BoogieIcfgContainer [2023-02-17 19:43:24,108 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 19:43:24,110 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 19:43:24,110 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 19:43:24,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 19:43:24,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 07:43:23" (1/3) ... [2023-02-17 19:43:24,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dce959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:43:24, skipping insertion in model container [2023-02-17 19:43:24,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 07:43:23" (2/3) ... [2023-02-17 19:43:24,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18dce959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 07:43:24, skipping insertion in model container [2023-02-17 19:43:24,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 07:43:24" (3/3) ... [2023-02-17 19:43:24,114 INFO L112 eAbstractionObserver]: Analyzing ICFG zero_sum3.c [2023-02-17 19:43:24,125 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 19:43:24,126 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 19:43:24,155 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 19:43:24,159 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;@1be917a8, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 19:43:24,160 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 19:43:24,162 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 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) [2023-02-17 19:43:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 19:43:24,167 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:24,167 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:24,168 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:24,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:24,171 INFO L85 PathProgramCache]: Analyzing trace with hash 534528496, now seen corresponding path program 1 times [2023-02-17 19:43:24,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:24,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318684707] [2023-02-17 19:43:24,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:24,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:43:24,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:24,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318684707] [2023-02-17 19:43:24,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318684707] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:43:24,300 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 19:43:24,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 19:43:24,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380908272] [2023-02-17 19:43:24,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:43:24,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 19:43:24,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 19:43:24,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 19:43:24,325 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.5666666666666667) internal successors, (47), 31 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) Second operand has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2023-02-17 19:43:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:24,337 INFO L93 Difference]: Finished difference Result 59 states and 86 transitions. [2023-02-17 19:43:24,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 19:43:24,339 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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 19 [2023-02-17 19:43:24,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:24,343 INFO L225 Difference]: With dead ends: 59 [2023-02-17 19:43:24,344 INFO L226 Difference]: Without dead ends: 27 [2023-02-17 19:43:24,346 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 [2023-02-17 19:43:24,348 INFO L413 NwaCegarLoop]: 39 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, 39 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 [2023-02-17 19:43:24,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:43:24,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-17 19:43:24,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-02-17 19:43:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2023-02-17 19:43:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2023-02-17 19:43:24,369 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 19 [2023-02-17 19:43:24,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:24,370 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2023-02-17 19:43:24,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.5) internal successors, (19), 2 states have internal predecessors, (19), 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) [2023-02-17 19:43:24,370 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2023-02-17 19:43:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-17 19:43:24,370 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:24,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:24,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 19:43:24,371 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash -697412484, now seen corresponding path program 1 times [2023-02-17 19:43:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:24,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866500231] [2023-02-17 19:43:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:24,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:24,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:43:24,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:24,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866500231] [2023-02-17 19:43:24,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866500231] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:43:24,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 19:43:24,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 19:43:24,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059273917] [2023-02-17 19:43:24,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:43:24,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 19:43:24,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:24,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 19:43:24,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 19:43:24,450 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-02-17 19:43:24,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:24,477 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2023-02-17 19:43:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 19:43:24,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2023-02-17 19:43:24,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:24,478 INFO L225 Difference]: With dead ends: 51 [2023-02-17 19:43:24,478 INFO L226 Difference]: Without dead ends: 29 [2023-02-17 19:43:24,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 19:43:24,480 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:43:24,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:43:24,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-17 19:43:24,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-02-17 19:43:24,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 27 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) [2023-02-17 19:43:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-02-17 19:43:24,484 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2023-02-17 19:43:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:24,485 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-02-17 19:43:24,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2023-02-17 19:43:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-02-17 19:43:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-17 19:43:24,486 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:24,486 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, 1] [2023-02-17 19:43:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 19:43:24,486 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash -506383970, now seen corresponding path program 1 times [2023-02-17 19:43:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:24,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517537872] [2023-02-17 19:43:24,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 19:43:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:24,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517537872] [2023-02-17 19:43:24,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517537872] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 19:43:24,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 19:43:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 19:43:24,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423060473] [2023-02-17 19:43:24,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 19:43:24,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 19:43:24,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:24,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 19:43:24,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 19:43:24,564 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2023-02-17 19:43:24,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:24,637 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2023-02-17 19:43:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 19:43:24,638 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) Word has length 21 [2023-02-17 19:43:24,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:24,639 INFO L225 Difference]: With dead ends: 59 [2023-02-17 19:43:24,639 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 19:43:24,639 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 [2023-02-17 19:43:24,640 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:43:24,641 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 17 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:43:24,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 19:43:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-02-17 19:43:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 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) [2023-02-17 19:43:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-02-17 19:43:24,645 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 21 [2023-02-17 19:43:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:24,646 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-02-17 19:43:24,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 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) [2023-02-17 19:43:24,646 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-02-17 19:43:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-17 19:43:24,647 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:24,647 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 19:43:24,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 615846698, now seen corresponding path program 1 times [2023-02-17 19:43:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:24,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658679617] [2023-02-17 19:43:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:24,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 19:43:24,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:24,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658679617] [2023-02-17 19:43:24,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658679617] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:43:24,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308311723] [2023-02-17 19:43:24,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:24,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:24,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:43:24,752 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) [2023-02-17 19:43:24,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 19:43:24,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:24,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 19:43:24,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:43:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 19:43:24,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:43:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 19:43:24,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308311723] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:43:24,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:43:24,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-17 19:43:24,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837975384] [2023-02-17 19:43:24,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:43:24,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 19:43:24,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:24,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 19:43:24,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-17 19:43:24,887 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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) [2023-02-17 19:43:24,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:24,916 INFO L93 Difference]: Finished difference Result 65 states and 77 transitions. [2023-02-17 19:43:24,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 19:43:24,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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 33 [2023-02-17 19:43:24,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:24,917 INFO L225 Difference]: With dead ends: 65 [2023-02-17 19:43:24,917 INFO L226 Difference]: Without dead ends: 37 [2023-02-17 19:43:24,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2023-02-17 19:43:24,919 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:43:24,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 61 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 19:43:24,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-17 19:43:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-02-17 19:43:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2) internal successors, (42), 35 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-17 19:43:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-02-17 19:43:24,923 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 33 [2023-02-17 19:43:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:24,924 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-02-17 19:43:24,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 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) [2023-02-17 19:43:24,924 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-02-17 19:43:24,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 19:43:24,925 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:24,925 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:24,942 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 19:43:25,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:25,131 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:25,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:25,132 INFO L85 PathProgramCache]: Analyzing trace with hash -160084788, now seen corresponding path program 2 times [2023-02-17 19:43:25,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:25,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529631902] [2023-02-17 19:43:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:25,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:25,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:25,228 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 19:43:25,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529631902] [2023-02-17 19:43:25,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529631902] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:43:25,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471442761] [2023-02-17 19:43:25,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 19:43:25,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:25,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:43:25,231 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) [2023-02-17 19:43:25,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 19:43:25,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 19:43:25,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:43:25,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-17 19:43:25,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:43:25,330 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 19:43:25,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:43:25,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 19:43:25,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471442761] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:43:25,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:43:25,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-02-17 19:43:25,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625971054] [2023-02-17 19:43:25,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:43:25,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-02-17 19:43:25,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:25,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-02-17 19:43:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-02-17 19:43:25,353 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2023-02-17 19:43:25,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:25,435 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2023-02-17 19:43:25,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 19:43:25,436 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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 35 [2023-02-17 19:43:25,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:25,436 INFO L225 Difference]: With dead ends: 78 [2023-02-17 19:43:25,436 INFO L226 Difference]: Without dead ends: 54 [2023-02-17 19:43:25,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2023-02-17 19:43:25,438 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:43:25,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 25 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:43:25,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-02-17 19:43:25,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2023-02-17 19:43:25,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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) [2023-02-17 19:43:25,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-02-17 19:43:25,448 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 35 [2023-02-17 19:43:25,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:25,449 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-02-17 19:43:25,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 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) [2023-02-17 19:43:25,449 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-02-17 19:43:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-17 19:43:25,451 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:25,452 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:25,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 19:43:25,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:25,657 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:25,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:25,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1337652904, now seen corresponding path program 3 times [2023-02-17 19:43:25,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:25,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936721736] [2023-02-17 19:43:25,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:25,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:43:26,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:26,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936721736] [2023-02-17 19:43:26,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936721736] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:43:26,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881548758] [2023-02-17 19:43:26,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 19:43:26,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:26,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:43:26,967 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) [2023-02-17 19:43:26,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 19:43:27,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 19:43:27,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:43:27,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 19:43:27,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:43:27,896 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 60 treesize of output 28 [2023-02-17 19:43:27,936 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-17 19:43:27,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:43:29,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 19:43:29,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 97 treesize of output 113 [2023-02-17 19:43:29,399 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 19:43:29,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 19:43:29,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 19:43:29,402 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 19:43:29,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 98 treesize of output 38 [2023-02-17 19:43:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 19:43:29,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881548758] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:43:29,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:43:29,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 33, 28] total 62 [2023-02-17 19:43:29,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069622741] [2023-02-17 19:43:29,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:43:29,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-17 19:43:29,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-17 19:43:29,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=366, Invalid=3416, Unknown=0, NotChecked=0, Total=3782 [2023-02-17 19:43:29,651 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 62 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 62 states have internal predecessors, (119), 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) [2023-02-17 19:43:31,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:31,129 INFO L93 Difference]: Finished difference Result 85 states and 96 transitions. [2023-02-17 19:43:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-17 19:43:31,130 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 62 states have internal predecessors, (119), 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 47 [2023-02-17 19:43:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:31,131 INFO L225 Difference]: With dead ends: 85 [2023-02-17 19:43:31,131 INFO L226 Difference]: Without dead ends: 81 [2023-02-17 19:43:31,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 35 SyntacticMatches, 33 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=535, Invalid=4721, Unknown=0, NotChecked=0, Total=5256 [2023-02-17 19:43:31,132 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 1440 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-17 19:43:31,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 120 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1440 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-17 19:43:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-02-17 19:43:31,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2023-02-17 19:43:31,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 76 states have internal predecessors, (88), 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) [2023-02-17 19:43:31,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 88 transitions. [2023-02-17 19:43:31,139 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 88 transitions. Word has length 47 [2023-02-17 19:43:31,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:31,140 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 88 transitions. [2023-02-17 19:43:31,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.9193548387096775) internal successors, (119), 62 states have internal predecessors, (119), 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) [2023-02-17 19:43:31,140 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 88 transitions. [2023-02-17 19:43:31,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 19:43:31,141 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:31,141 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:31,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 19:43:31,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:31,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:31,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:31,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1235984134, now seen corresponding path program 4 times [2023-02-17 19:43:31,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:31,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478759126] [2023-02-17 19:43:31,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:31,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 19:43:31,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:31,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478759126] [2023-02-17 19:43:31,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478759126] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:43:31,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910641914] [2023-02-17 19:43:31,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 19:43:31,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:31,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:43:31,436 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) [2023-02-17 19:43:31,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 19:43:31,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 19:43:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:43:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 19:43:31,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:43:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 19:43:31,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:43:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 19:43:31,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910641914] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:43:31,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:43:31,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-02-17 19:43:31,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183058472] [2023-02-17 19:43:31,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:43:31,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 19:43:31,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:31,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 19:43:31,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-02-17 19:43:31,573 INFO L87 Difference]: Start difference. First operand 77 states and 88 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 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) [2023-02-17 19:43:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:31,808 INFO L93 Difference]: Finished difference Result 206 states and 235 transitions. [2023-02-17 19:43:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 19:43:31,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 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 49 [2023-02-17 19:43:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:31,809 INFO L225 Difference]: With dead ends: 206 [2023-02-17 19:43:31,809 INFO L226 Difference]: Without dead ends: 104 [2023-02-17 19:43:31,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2023-02-17 19:43:31,810 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 169 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 19:43:31,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 62 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 19:43:31,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-17 19:43:31,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 84. [2023-02-17 19:43:31,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.1325301204819278) internal successors, (94), 83 states have internal predecessors, (94), 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) [2023-02-17 19:43:31,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 94 transitions. [2023-02-17 19:43:31,816 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 94 transitions. Word has length 49 [2023-02-17 19:43:31,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:31,816 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 94 transitions. [2023-02-17 19:43:31,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 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) [2023-02-17 19:43:31,816 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 94 transitions. [2023-02-17 19:43:31,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 19:43:31,817 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:31,817 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:31,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 19:43:32,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:32,022 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:32,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:32,022 INFO L85 PathProgramCache]: Analyzing trace with hash -925733540, now seen corresponding path program 5 times [2023-02-17 19:43:32,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:32,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790381453] [2023-02-17 19:43:32,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:32,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:32,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 19:43:32,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790381453] [2023-02-17 19:43:32,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790381453] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:43:32,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979651169] [2023-02-17 19:43:32,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 19:43:32,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:32,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:43:32,095 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) [2023-02-17 19:43:32,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 19:43:32,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 19:43:32,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:43:32,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-17 19:43:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:43:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 19:43:32,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:43:32,217 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-02-17 19:43:32,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979651169] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 19:43:32,217 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 19:43:32,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-17 19:43:32,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17777961] [2023-02-17 19:43:32,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 19:43:32,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-17 19:43:32,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 19:43:32,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-17 19:43:32,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-02-17 19:43:32,219 INFO L87 Difference]: Start difference. First operand 84 states and 94 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 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) [2023-02-17 19:43:32,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 19:43:32,323 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2023-02-17 19:43:32,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-17 19:43:32,324 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 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 51 [2023-02-17 19:43:32,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 19:43:32,324 INFO L225 Difference]: With dead ends: 96 [2023-02-17 19:43:32,324 INFO L226 Difference]: Without dead ends: 68 [2023-02-17 19:43:32,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 89 SyntacticMatches, 8 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2023-02-17 19:43:32,325 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 19:43:32,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 29 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 19:43:32,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-17 19:43:32,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2023-02-17 19:43:32,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 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) [2023-02-17 19:43:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 68 transitions. [2023-02-17 19:43:32,331 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 68 transitions. Word has length 51 [2023-02-17 19:43:32,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 19:43:32,331 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 68 transitions. [2023-02-17 19:43:32,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 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) [2023-02-17 19:43:32,332 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-02-17 19:43:32,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-17 19:43:32,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 19:43:32,333 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 19:43:32,340 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 19:43:32,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:32,538 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 19:43:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 19:43:32,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1781065978, now seen corresponding path program 6 times [2023-02-17 19:43:32,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 19:43:32,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608724346] [2023-02-17 19:43:32,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 19:43:32,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 19:43:32,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 19:43:34,664 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:43:34,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 19:43:34,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608724346] [2023-02-17 19:43:34,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608724346] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 19:43:34,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521129608] [2023-02-17 19:43:34,664 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 19:43:34,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 19:43:34,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 19:43:34,665 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) [2023-02-17 19:43:34,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 19:43:34,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-17 19:43:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 19:43:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 94 conjunts are in the unsatisfiable core [2023-02-17 19:43:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 19:43:34,742 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 [2023-02-17 19:43:37,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 19:43:37,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 19:43:37,257 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 19:43:37,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 68 treesize of output 107 [2023-02-17 19:43:37,488 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-17 19:43:37,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 19:46:28,544 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 520 treesize of output 472 [2023-02-17 19:46:28,566 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 19:46:28,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 8588 treesize of output 6601