./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/relax-2-2.i --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-examples/relax-2-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 18:14:03,981 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 18:14:03,982 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 18:14:04,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 18:14:04,013 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 18:14:04,015 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 18:14:04,017 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 18:14:04,018 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 18:14:04,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 18:14:04,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 18:14:04,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 18:14:04,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 18:14:04,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 18:14:04,027 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 18:14:04,028 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 18:14:04,029 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 18:14:04,030 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 18:14:04,031 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 18:14:04,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 18:14:04,036 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 18:14:04,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 18:14:04,038 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 18:14:04,038 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 18:14:04,039 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 18:14:04,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 18:14:04,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 18:14:04,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 18:14:04,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 18:14:04,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 18:14:04,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 18:14:04,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 18:14:04,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 18:14:04,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 18:14:04,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 18:14:04,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 18:14:04,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 18:14:04,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 18:14:04,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 18:14:04,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 18:14:04,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 18:14:04,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 18:14:04,055 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 18:14:04,077 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 18:14:04,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 18:14:04,078 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 18:14:04,078 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 18:14:04,091 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 18:14:04,091 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 18:14:04,091 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 18:14:04,091 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 18:14:04,092 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 18:14:04,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 18:14:04,092 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 18:14:04,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 18:14:04,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 18:14:04,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 18:14:04,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 18:14:04,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 18:14:04,093 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 18:14:04,093 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 18:14:04,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 18:14:04,094 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 18:14:04,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 18:14:04,094 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 18:14:04,094 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 18:14:04,094 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 18:14:04,094 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:14:04,095 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 18:14:04,095 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 18:14:04,095 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 18:14:04,095 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 18:14:04,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 18:14:04,096 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 18:14:04,096 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 18:14:04,096 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 18:14:04,096 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 18:14:04,096 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 18:14:04,097 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 56e9aa9f750ced23bf75100b2ff89e86c96f8abe4883dfab569153879bc59aef [2023-02-17 18:14:04,299 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 18:14:04,312 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 18:14:04,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 18:14:04,314 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 18:14:04,315 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 18:14:04,315 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-17 18:14:05,223 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 18:14:05,468 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 18:14:05,469 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/relax-2-2.i [2023-02-17 18:14:05,478 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1e0cd38b/3a971b6dac614629bc958f7815f47143/FLAG412b7796b [2023-02-17 18:14:05,487 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d1e0cd38b/3a971b6dac614629bc958f7815f47143 [2023-02-17 18:14:05,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 18:14:05,490 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 18:14:05,491 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 18:14:05,491 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 18:14:05,494 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 18:14:05,495 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,496 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c848a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05, skipping insertion in model container [2023-02-17 18:14:05,496 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,501 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 18:14:05,547 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 18:14:05,637 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-examples/relax-2-2.i[982,995] [2023-02-17 18:14:05,740 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:14:05,749 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 18:14:05,761 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-examples/relax-2-2.i[982,995] [2023-02-17 18:14:05,792 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 18:14:05,809 INFO L208 MainTranslator]: Completed translation [2023-02-17 18:14:05,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05 WrapperNode [2023-02-17 18:14:05,810 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 18:14:05,811 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 18:14:05,811 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 18:14:05,811 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 18:14:05,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,852 INFO L138 Inliner]: procedures = 120, calls = 28, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 137 [2023-02-17 18:14:05,853 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 18:14:05,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 18:14:05,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 18:14:05,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 18:14:05,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,864 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,901 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,903 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,905 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 18:14:05,906 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 18:14:05,906 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 18:14:05,906 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 18:14:05,907 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (1/1) ... [2023-02-17 18:14:05,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 18:14:05,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:05,933 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 18:14:05,951 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 18:14:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-17 18:14:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 18:14:05,962 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 18:14:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-17 18:14:05,962 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 18:14:05,963 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 18:14:05,963 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-02-17 18:14:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 18:14:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 18:14:05,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 18:14:05,964 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 18:14:06,057 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 18:14:06,059 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 18:14:06,281 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 18:14:06,285 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 18:14:06,286 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-17 18:14:06,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:14:06 BoogieIcfgContainer [2023-02-17 18:14:06,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 18:14:06,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 18:14:06,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 18:14:06,311 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 18:14:06,311 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 06:14:05" (1/3) ... [2023-02-17 18:14:06,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628a2b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:14:06, skipping insertion in model container [2023-02-17 18:14:06,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 06:14:05" (2/3) ... [2023-02-17 18:14:06,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@628a2b84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 06:14:06, skipping insertion in model container [2023-02-17 18:14:06,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 06:14:06" (3/3) ... [2023-02-17 18:14:06,313 INFO L112 eAbstractionObserver]: Analyzing ICFG relax-2-2.i [2023-02-17 18:14:06,324 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 18:14:06,325 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 18:14:06,368 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 18:14:06,373 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;@4f72fa45, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 18:14:06,374 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 18:14:06,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:06,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 18:14:06,382 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:06,382 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:06,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:06,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:06,388 INFO L85 PathProgramCache]: Analyzing trace with hash 424197970, now seen corresponding path program 1 times [2023-02-17 18:14:06,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:06,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076242162] [2023-02-17 18:14:06,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:06,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:06,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:06,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:06,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:06,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:06,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076242162] [2023-02-17 18:14:06,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076242162] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:06,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:06,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 18:14:06,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785216536] [2023-02-17 18:14:06,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:06,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 18:14:06,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:06,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 18:14:06,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 18:14:06,623 INFO L87 Difference]: Start difference. First operand has 54 states, 43 states have (on average 1.5813953488372092) internal successors, (68), 45 states have internal predecessors, (68), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 18:14:06,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:06,642 INFO L93 Difference]: Finished difference Result 105 states and 167 transitions. [2023-02-17 18:14:06,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 18:14:06,644 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 24 [2023-02-17 18:14:06,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:06,653 INFO L225 Difference]: With dead ends: 105 [2023-02-17 18:14:06,654 INFO L226 Difference]: Without dead ends: 50 [2023-02-17 18:14:06,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 18:14:06,660 INFO L413 NwaCegarLoop]: 75 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, 75 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 18:14:06,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:06,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-17 18:14:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-17 18:14:06,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.4) internal successors, (56), 41 states have internal predecessors, (56), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 69 transitions. [2023-02-17 18:14:06,690 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 69 transitions. Word has length 24 [2023-02-17 18:14:06,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:06,691 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 69 transitions. [2023-02-17 18:14:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2023-02-17 18:14:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 69 transitions. [2023-02-17 18:14:06,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-17 18:14:06,692 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:06,693 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:06,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-17 18:14:06,693 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:06,694 INFO L85 PathProgramCache]: Analyzing trace with hash 518459404, now seen corresponding path program 1 times [2023-02-17 18:14:06,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:06,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623207065] [2023-02-17 18:14:06,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:06,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:06,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:06,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:06,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:06,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623207065] [2023-02-17 18:14:06,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623207065] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:06,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:06,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 18:14:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924395859] [2023-02-17 18:14:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:06,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 18:14:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:06,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 18:14:06,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 18:14:06,899 INFO L87 Difference]: Start difference. First operand 50 states and 69 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:06,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:06,944 INFO L93 Difference]: Finished difference Result 83 states and 112 transitions. [2023-02-17 18:14:06,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 18:14:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-02-17 18:14:06,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:06,954 INFO L225 Difference]: With dead ends: 83 [2023-02-17 18:14:06,954 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 18:14:06,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 18:14:06,955 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 10 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:06,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 195 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:06,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 18:14:06,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 52. [2023-02-17 18:14:06,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 42 states have (on average 1.380952380952381) internal successors, (58), 43 states have internal predecessors, (58), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:06,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2023-02-17 18:14:06,969 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 24 [2023-02-17 18:14:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:06,970 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2023-02-17 18:14:06,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:06,970 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2023-02-17 18:14:06,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-02-17 18:14:06,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:06,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:06,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-17 18:14:06,972 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:06,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:06,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1090015461, now seen corresponding path program 1 times [2023-02-17 18:14:06,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:06,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970044911] [2023-02-17 18:14:06,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:06,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:07,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:07,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:07,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970044911] [2023-02-17 18:14:07,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970044911] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:07,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:07,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-02-17 18:14:07,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183003744] [2023-02-17 18:14:07,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:07,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 18:14:07,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:07,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 18:14:07,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-02-17 18:14:07,249 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:07,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:07,350 INFO L93 Difference]: Finished difference Result 108 states and 146 transitions. [2023-02-17 18:14:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 18:14:07,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2023-02-17 18:14:07,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:07,351 INFO L225 Difference]: With dead ends: 108 [2023-02-17 18:14:07,352 INFO L226 Difference]: Without dead ends: 72 [2023-02-17 18:14:07,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-02-17 18:14:07,353 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 50 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:07,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 284 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:14:07,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-17 18:14:07,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2023-02-17 18:14:07,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 58 states have (on average 1.396551724137931) internal successors, (81), 59 states have internal predecessors, (81), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:07,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 94 transitions. [2023-02-17 18:14:07,362 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 94 transitions. Word has length 26 [2023-02-17 18:14:07,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:07,363 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 94 transitions. [2023-02-17 18:14:07,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:07,363 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 94 transitions. [2023-02-17 18:14:07,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-02-17 18:14:07,364 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:07,364 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:07,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-17 18:14:07,365 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:07,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1637522002, now seen corresponding path program 1 times [2023-02-17 18:14:07,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:07,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982261725] [2023-02-17 18:14:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:07,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:07,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:07,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:07,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982261725] [2023-02-17 18:14:07,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982261725] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:07,619 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:07,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-02-17 18:14:07,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736128508] [2023-02-17 18:14:07,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:07,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 18:14:07,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 18:14:07,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:14:07,621 INFO L87 Difference]: Start difference. First operand 68 states and 94 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:07,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:07,800 INFO L93 Difference]: Finished difference Result 110 states and 147 transitions. [2023-02-17 18:14:07,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-17 18:14:07,801 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 27 [2023-02-17 18:14:07,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:07,802 INFO L225 Difference]: With dead ends: 110 [2023-02-17 18:14:07,802 INFO L226 Difference]: Without dead ends: 98 [2023-02-17 18:14:07,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-02-17 18:14:07,803 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 120 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:07,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 333 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:14:07,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-02-17 18:14:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 76. [2023-02-17 18:14:07,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 66 states have (on average 1.4090909090909092) internal successors, (93), 67 states have internal predecessors, (93), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:07,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 106 transitions. [2023-02-17 18:14:07,813 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 106 transitions. Word has length 27 [2023-02-17 18:14:07,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:07,813 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 106 transitions. [2023-02-17 18:14:07,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:07,813 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 106 transitions. [2023-02-17 18:14:07,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-17 18:14:07,814 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:07,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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 18:14:07,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-02-17 18:14:07,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:07,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:07,815 INFO L85 PathProgramCache]: Analyzing trace with hash -703814141, now seen corresponding path program 1 times [2023-02-17 18:14:07,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:07,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082992985] [2023-02-17 18:14:07,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:07,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:08,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:08,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082992985] [2023-02-17 18:14:08,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082992985] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:08,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70264491] [2023-02-17 18:14:08,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:08,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:08,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:08,059 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 18:14:08,131 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 18:14:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 18:14:08,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:08,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:08,269 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:14:08,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70264491] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:08,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:14:08,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2023-02-17 18:14:08,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058844745] [2023-02-17 18:14:08,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:08,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 18:14:08,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:08,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 18:14:08,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-02-17 18:14:08,271 INFO L87 Difference]: Start difference. First operand 76 states and 106 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:08,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:08,353 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2023-02-17 18:14:08,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:14:08,353 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2023-02-17 18:14:08,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:08,354 INFO L225 Difference]: With dead ends: 88 [2023-02-17 18:14:08,354 INFO L226 Difference]: Without dead ends: 86 [2023-02-17 18:14:08,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-02-17 18:14:08,355 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 76 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:08,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 186 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:14:08,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-02-17 18:14:08,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 80. [2023-02-17 18:14:08,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 69 states have (on average 1.391304347826087) internal successors, (96), 70 states have internal predecessors, (96), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:08,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 109 transitions. [2023-02-17 18:14:08,366 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 109 transitions. Word has length 28 [2023-02-17 18:14:08,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:08,367 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 109 transitions. [2023-02-17 18:14:08,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:08,367 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 109 transitions. [2023-02-17 18:14:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 18:14:08,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:08,368 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-02-17 18:14:08,376 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 18:14:08,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:08,572 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:08,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:08,573 INFO L85 PathProgramCache]: Analyzing trace with hash 338610741, now seen corresponding path program 1 times [2023-02-17 18:14:08,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:08,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332735733] [2023-02-17 18:14:08,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:08,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:08,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,629 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:08,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:08,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332735733] [2023-02-17 18:14:08,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332735733] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:08,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:08,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 18:14:08,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966222590] [2023-02-17 18:14:08,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:08,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 18:14:08,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 18:14:08,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-17 18:14:08,631 INFO L87 Difference]: Start difference. First operand 80 states and 109 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:08,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:08,645 INFO L93 Difference]: Finished difference Result 97 states and 128 transitions. [2023-02-17 18:14:08,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 18:14:08,646 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-17 18:14:08,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:08,646 INFO L225 Difference]: With dead ends: 97 [2023-02-17 18:14:08,646 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 18:14:08,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-17 18:14:08,647 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 17 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:08,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 175 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:08,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 18:14:08,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2023-02-17 18:14:08,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3529411764705883) internal successors, (92), 69 states have internal predecessors, (92), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 105 transitions. [2023-02-17 18:14:08,655 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 105 transitions. Word has length 29 [2023-02-17 18:14:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:08,655 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 105 transitions. [2023-02-17 18:14:08,655 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:08,655 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 105 transitions. [2023-02-17 18:14:08,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 18:14:08,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:08,656 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-02-17 18:14:08,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-02-17 18:14:08,656 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:08,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:08,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1088390000, now seen corresponding path program 1 times [2023-02-17 18:14:08,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:08,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232441478] [2023-02-17 18:14:08,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:08,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:08,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:08,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232441478] [2023-02-17 18:14:08,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232441478] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:08,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:08,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 18:14:08,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906897410] [2023-02-17 18:14:08,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:08,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 18:14:08,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:08,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 18:14:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-17 18:14:08,743 INFO L87 Difference]: Start difference. First operand 79 states and 105 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:08,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:08,803 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2023-02-17 18:14:08,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-17 18:14:08,803 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-17 18:14:08,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:08,804 INFO L225 Difference]: With dead ends: 90 [2023-02-17 18:14:08,804 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 18:14:08,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-17 18:14:08,808 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 11 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:08,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 216 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 18:14:08,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-02-17 18:14:08,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.326086956521739) internal successors, (61), 47 states have internal predecessors, (61), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:08,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 74 transitions. [2023-02-17 18:14:08,820 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 74 transitions. Word has length 29 [2023-02-17 18:14:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:08,821 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 74 transitions. [2023-02-17 18:14:08,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:08,821 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 74 transitions. [2023-02-17 18:14:08,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-17 18:14:08,822 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:08,822 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-02-17 18:14:08,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-02-17 18:14:08,822 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:08,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:08,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1413511858, now seen corresponding path program 1 times [2023-02-17 18:14:08,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:08,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954202448] [2023-02-17 18:14:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:08,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:08,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:09,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:09,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:09,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954202448] [2023-02-17 18:14:09,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954202448] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:09,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422487670] [2023-02-17 18:14:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:09,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:09,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:09,055 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 18:14:09,056 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 18:14:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 18:14:09,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:09,175 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:09,176 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:14:09,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422487670] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:09,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:14:09,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-02-17 18:14:09,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012983336] [2023-02-17 18:14:09,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:09,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 18:14:09,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:09,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 18:14:09,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2023-02-17 18:14:09,178 INFO L87 Difference]: Start difference. First operand 57 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:09,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:09,228 INFO L93 Difference]: Finished difference Result 71 states and 90 transitions. [2023-02-17 18:14:09,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 18:14:09,229 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 29 [2023-02-17 18:14:09,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:09,230 INFO L225 Difference]: With dead ends: 71 [2023-02-17 18:14:09,230 INFO L226 Difference]: Without dead ends: 57 [2023-02-17 18:14:09,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-02-17 18:14:09,231 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:09,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 114 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:09,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-02-17 18:14:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-02-17 18:14:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.3043478260869565) internal successors, (60), 47 states have internal predecessors, (60), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2023-02-17 18:14:09,235 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 29 [2023-02-17 18:14:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:09,236 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2023-02-17 18:14:09,236 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), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2023-02-17 18:14:09,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-17 18:14:09,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:09,237 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-02-17 18:14:09,244 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 18:14:09,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-17 18:14:09,442 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:09,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1264785641, now seen corresponding path program 1 times [2023-02-17 18:14:09,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:09,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271339215] [2023-02-17 18:14:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:09,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:09,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:09,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,468 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:09,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:09,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271339215] [2023-02-17 18:14:09,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271339215] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:09,469 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:14:09,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-17 18:14:09,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067269873] [2023-02-17 18:14:09,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:09,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:14:09,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:09,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:14:09,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-17 18:14:09,470 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:09,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:09,482 INFO L93 Difference]: Finished difference Result 93 states and 123 transitions. [2023-02-17 18:14:09,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:14:09,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2023-02-17 18:14:09,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:09,483 INFO L225 Difference]: With dead ends: 93 [2023-02-17 18:14:09,483 INFO L226 Difference]: Without dead ends: 79 [2023-02-17 18:14:09,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 18:14:09,484 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:09,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 130 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:09,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-17 18:14:09,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2023-02-17 18:14:09,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 51 states have (on average 1.3137254901960784) internal successors, (67), 52 states have internal predecessors, (67), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:09,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2023-02-17 18:14:09,489 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 31 [2023-02-17 18:14:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:09,489 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2023-02-17 18:14:09,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2023-02-17 18:14:09,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-17 18:14:09,490 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:09,490 INFO L195 NwaCegarLoop]: trace histogram [2, 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] [2023-02-17 18:14:09,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-02-17 18:14:09,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:09,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:09,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1196949427, now seen corresponding path program 1 times [2023-02-17 18:14:09,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:09,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167107181] [2023-02-17 18:14:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:09,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:09,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:09,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:09,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167107181] [2023-02-17 18:14:09,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167107181] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:09,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534495705] [2023-02-17 18:14:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:09,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:09,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:09,594 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 18:14:09,596 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 18:14:09,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:09,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-17 18:14:09,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:09,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:09,690 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:14:09,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534495705] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:09,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:14:09,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 10 [2023-02-17 18:14:09,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232690115] [2023-02-17 18:14:09,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:09,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 18:14:09,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:09,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 18:14:09,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-02-17 18:14:09,692 INFO L87 Difference]: Start difference. First operand 62 states and 80 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:09,751 INFO L93 Difference]: Finished difference Result 124 states and 160 transitions. [2023-02-17 18:14:09,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:14:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2023-02-17 18:14:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:09,752 INFO L225 Difference]: With dead ends: 124 [2023-02-17 18:14:09,753 INFO L226 Difference]: Without dead ends: 64 [2023-02-17 18:14:09,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-02-17 18:14:09,753 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 38 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:09,754 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 221 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:09,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-17 18:14:09,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2023-02-17 18:14:09,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 52 states have (on average 1.3076923076923077) internal successors, (68), 53 states have internal predecessors, (68), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-17 18:14:09,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2023-02-17 18:14:09,757 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 35 [2023-02-17 18:14:09,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:09,758 INFO L495 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2023-02-17 18:14:09,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:09,758 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2023-02-17 18:14:09,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 18:14:09,758 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:09,759 INFO L195 NwaCegarLoop]: trace histogram [2, 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 18:14:09,775 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 18:14:09,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:09,963 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:09,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1163666735, now seen corresponding path program 1 times [2023-02-17 18:14:09,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:09,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396819999] [2023-02-17 18:14:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:09,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:10,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:10,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:10,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396819999] [2023-02-17 18:14:10,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396819999] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:10,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309740964] [2023-02-17 18:14:10,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:10,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:10,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:10,056 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 18:14:10,059 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 18:14:10,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 18:14:10,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:10,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:10,234 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:10,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309740964] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:10,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:10,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 10] total 15 [2023-02-17 18:14:10,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057958746] [2023-02-17 18:14:10,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:10,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 18:14:10,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:10,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 18:14:10,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2023-02-17 18:14:10,237 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:10,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:10,385 INFO L93 Difference]: Finished difference Result 148 states and 198 transitions. [2023-02-17 18:14:10,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 18:14:10,386 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-17 18:14:10,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:10,387 INFO L225 Difference]: With dead ends: 148 [2023-02-17 18:14:10,387 INFO L226 Difference]: Without dead ends: 125 [2023-02-17 18:14:10,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-02-17 18:14:10,388 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:10,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 684 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:14:10,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-02-17 18:14:10,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 93. [2023-02-17 18:14:10,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:10,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 122 transitions. [2023-02-17 18:14:10,395 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 122 transitions. Word has length 37 [2023-02-17 18:14:10,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:10,395 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 122 transitions. [2023-02-17 18:14:10,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:10,395 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 122 transitions. [2023-02-17 18:14:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-17 18:14:10,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:10,396 INFO L195 NwaCegarLoop]: trace histogram [2, 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 18:14:10,411 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 18:14:10,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:10,601 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:10,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1165513777, now seen corresponding path program 1 times [2023-02-17 18:14:10,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:10,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432404166] [2023-02-17 18:14:10,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:10,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:10,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:10,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:10,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432404166] [2023-02-17 18:14:10,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432404166] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:10,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446291502] [2023-02-17 18:14:10,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:10,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:10,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:10,800 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 18:14:10,802 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 18:14:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:10,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 18:14:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 18:14:10,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:14:10,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446291502] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:10,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:14:10,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [11] total 13 [2023-02-17 18:14:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330932074] [2023-02-17 18:14:10,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:10,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 18:14:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 18:14:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-02-17 18:14:10,877 INFO L87 Difference]: Start difference. First operand 93 states and 122 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:10,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:10,932 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2023-02-17 18:14:10,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 18:14:10,933 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2023-02-17 18:14:10,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:10,934 INFO L225 Difference]: With dead ends: 127 [2023-02-17 18:14:10,934 INFO L226 Difference]: Without dead ends: 113 [2023-02-17 18:14:10,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2023-02-17 18:14:10,934 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 55 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:10,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 141 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:10,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-17 18:14:10,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 99. [2023-02-17 18:14:10,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 87 states have (on average 1.3103448275862069) internal successors, (114), 88 states have internal predecessors, (114), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:10,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 129 transitions. [2023-02-17 18:14:10,941 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 129 transitions. Word has length 37 [2023-02-17 18:14:10,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:10,941 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 129 transitions. [2023-02-17 18:14:10,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:10,942 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 129 transitions. [2023-02-17 18:14:10,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-17 18:14:10,942 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:10,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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] [2023-02-17 18:14:10,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-17 18:14:11,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-17 18:14:11,147 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:11,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2034579695, now seen corresponding path program 1 times [2023-02-17 18:14:11,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:11,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980084650] [2023-02-17 18:14:11,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:11,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:11,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:11,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:11,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:11,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 18:14:11,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:11,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980084650] [2023-02-17 18:14:11,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980084650] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:11,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434209215] [2023-02-17 18:14:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:11,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:11,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:11,257 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 18:14:11,259 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 18:14:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:11,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 18:14:11,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-17 18:14:11,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:11,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434209215] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:11,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:11,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 8] total 18 [2023-02-17 18:14:11,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959990895] [2023-02-17 18:14:11,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:11,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 18:14:11,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:11,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 18:14:11,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-02-17 18:14:11,401 INFO L87 Difference]: Start difference. First operand 99 states and 129 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:11,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:11,699 INFO L93 Difference]: Finished difference Result 269 states and 362 transitions. [2023-02-17 18:14:11,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 18:14:11,700 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2023-02-17 18:14:11,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:11,701 INFO L225 Difference]: With dead ends: 269 [2023-02-17 18:14:11,701 INFO L226 Difference]: Without dead ends: 192 [2023-02-17 18:14:11,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2023-02-17 18:14:11,702 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 437 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:11,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 622 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:14:11,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2023-02-17 18:14:11,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 122. [2023-02-17 18:14:11,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 110 states have (on average 1.3) internal successors, (143), 111 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:11,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2023-02-17 18:14:11,711 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 38 [2023-02-17 18:14:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:11,711 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2023-02-17 18:14:11,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2023-02-17 18:14:11,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 18:14:11,712 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:11,712 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1] [2023-02-17 18:14:11,718 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 18:14:11,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:11,917 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:11,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:11,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2103922323, now seen corresponding path program 1 times [2023-02-17 18:14:11,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:11,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139923633] [2023-02-17 18:14:11,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:11,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:11,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:12,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2023-02-17 18:14:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:12,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139923633] [2023-02-17 18:14:12,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139923633] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:12,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601904218] [2023-02-17 18:14:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:12,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:12,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:12,031 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:14:12,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 18:14:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 18:14:12,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:12,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 18:14:12,130 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:14:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601904218] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:12,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:14:12,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2023-02-17 18:14:12,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869236353] [2023-02-17 18:14:12,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:12,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-02-17 18:14:12,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:12,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-02-17 18:14:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-02-17 18:14:12,132 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 18:14:12,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:12,207 INFO L93 Difference]: Finished difference Result 167 states and 214 transitions. [2023-02-17 18:14:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 18:14:12,207 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2023-02-17 18:14:12,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:12,208 INFO L225 Difference]: With dead ends: 167 [2023-02-17 18:14:12,208 INFO L226 Difference]: Without dead ends: 132 [2023-02-17 18:14:12,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-02-17 18:14:12,209 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 61 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:12,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 138 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:14:12,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-17 18:14:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2023-02-17 18:14:12,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 112 states have (on average 1.2767857142857142) internal successors, (143), 113 states have internal predecessors, (143), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:12,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 158 transitions. [2023-02-17 18:14:12,217 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 158 transitions. Word has length 42 [2023-02-17 18:14:12,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:12,218 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 158 transitions. [2023-02-17 18:14:12,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-17 18:14:12,218 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 158 transitions. [2023-02-17 18:14:12,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 18:14:12,218 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:12,219 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2023-02-17 18:14:12,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-17 18:14:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:12,423 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:12,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1093284825, now seen corresponding path program 1 times [2023-02-17 18:14:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:12,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850174096] [2023-02-17 18:14:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 18:14:12,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850174096] [2023-02-17 18:14:12,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850174096] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:12,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789594890] [2023-02-17 18:14:12,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:12,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:12,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:12,517 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:14:12,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 18:14:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:12,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-17 18:14:12,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:12,694 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:12,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:12,733 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-02-17 18:14:12,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789594890] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:12,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:12,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 7] total 20 [2023-02-17 18:14:12,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143788169] [2023-02-17 18:14:12,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:12,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 18:14:12,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:12,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 18:14:12,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2023-02-17 18:14:12,736 INFO L87 Difference]: Start difference. First operand 124 states and 158 transitions. Second operand has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:13,405 INFO L93 Difference]: Finished difference Result 350 states and 484 transitions. [2023-02-17 18:14:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-17 18:14:13,405 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-17 18:14:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:13,406 INFO L225 Difference]: With dead ends: 350 [2023-02-17 18:14:13,406 INFO L226 Difference]: Without dead ends: 320 [2023-02-17 18:14:13,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=1658, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 18:14:13,408 INFO L413 NwaCegarLoop]: 127 mSDtfsCounter, 534 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 534 SdHoareTripleChecker+Valid, 1260 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:13,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [534 Valid, 1260 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-17 18:14:13,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-02-17 18:14:13,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 166. [2023-02-17 18:14:13,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 154 states have (on average 1.3311688311688312) internal successors, (205), 155 states have internal predecessors, (205), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:13,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 220 transitions. [2023-02-17 18:14:13,421 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 220 transitions. Word has length 42 [2023-02-17 18:14:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:13,422 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 220 transitions. [2023-02-17 18:14:13,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 18 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 220 transitions. [2023-02-17 18:14:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-17 18:14:13,422 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:13,423 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 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, 1] [2023-02-17 18:14:13,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 18:14:13,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-17 18:14:13,628 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:13,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1902631451, now seen corresponding path program 1 times [2023-02-17 18:14:13,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:13,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362484642] [2023-02-17 18:14:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:13,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:13,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:13,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 18:14:13,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:13,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362484642] [2023-02-17 18:14:13,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362484642] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:13,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169927582] [2023-02-17 18:14:13,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:13,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:13,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:13,953 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:14:13,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 18:14:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:14,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 18:14:14,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:14,132 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 18:14:14,259 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:14:14,259 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 336 treesize of output 490 [2023-02-17 18:14:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-17 18:14:37,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 18:14:38,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169927582] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:38,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-02-17 18:14:38,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [11, 17] total 31 [2023-02-17 18:14:38,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774200094] [2023-02-17 18:14:38,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:38,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 18:14:38,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:38,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 18:14:38,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-02-17 18:14:38,327 INFO L87 Difference]: Start difference. First operand 166 states and 220 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:38,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:38,950 INFO L93 Difference]: Finished difference Result 297 states and 404 transitions. [2023-02-17 18:14:38,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-17 18:14:38,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2023-02-17 18:14:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:38,951 INFO L225 Difference]: With dead ends: 297 [2023-02-17 18:14:38,951 INFO L226 Difference]: Without dead ends: 288 [2023-02-17 18:14:38,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 61 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 18:14:38,952 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 117 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:38,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 676 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:14:38,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2023-02-17 18:14:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 207. [2023-02-17 18:14:38,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 195 states have (on average 1.353846153846154) internal successors, (264), 196 states have internal predecessors, (264), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:38,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 279 transitions. [2023-02-17 18:14:38,970 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 279 transitions. Word has length 42 [2023-02-17 18:14:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:38,970 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 279 transitions. [2023-02-17 18:14:38,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 279 transitions. [2023-02-17 18:14:38,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-02-17 18:14:38,971 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:38,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:38,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-17 18:14:39,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-02-17 18:14:39,176 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:39,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:39,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1797758865, now seen corresponding path program 1 times [2023-02-17 18:14:39,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:39,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662783069] [2023-02-17 18:14:39,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:39,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:39,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:39,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,311 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 18:14:39,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662783069] [2023-02-17 18:14:39,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662783069] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:39,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397292423] [2023-02-17 18:14:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:39,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:39,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:39,312 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:14:39,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 18:14:39,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 18:14:39,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 18:14:39,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:39,466 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 18:14:39,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397292423] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:39,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:39,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2023-02-17 18:14:39,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656236729] [2023-02-17 18:14:39,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:39,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 18:14:39,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:39,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 18:14:39,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2023-02-17 18:14:39,467 INFO L87 Difference]: Start difference. First operand 207 states and 279 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:39,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:39,648 INFO L93 Difference]: Finished difference Result 258 states and 342 transitions. [2023-02-17 18:14:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 18:14:39,649 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2023-02-17 18:14:39,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:39,650 INFO L225 Difference]: With dead ends: 258 [2023-02-17 18:14:39,650 INFO L226 Difference]: Without dead ends: 182 [2023-02-17 18:14:39,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2023-02-17 18:14:39,650 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 173 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:39,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 648 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:14:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-02-17 18:14:39,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2023-02-17 18:14:39,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 146 states have (on average 1.321917808219178) internal successors, (193), 147 states have internal predecessors, (193), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2023-02-17 18:14:39,666 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 43 [2023-02-17 18:14:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:39,666 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2023-02-17 18:14:39,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 18 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2023-02-17 18:14:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 18:14:39,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:39,667 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:39,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 18:14:39,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-17 18:14:39,871 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:39,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:39,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2052626821, now seen corresponding path program 1 times [2023-02-17 18:14:39,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:39,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714234535] [2023-02-17 18:14:39,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:39,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:39,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-17 18:14:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 18:14:39,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:39,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714234535] [2023-02-17 18:14:39,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714234535] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:39,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491892716] [2023-02-17 18:14:39,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:39,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:39,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:39,960 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:14:39,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 18:14:40,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:40,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 18:14:40,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 18:14:40,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 18:14:40,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491892716] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:14:40,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 18:14:40,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2023-02-17 18:14:40,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55561750] [2023-02-17 18:14:40,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:14:40,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-17 18:14:40,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:40,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-17 18:14:40,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-17 18:14:40,034 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 18:14:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:40,063 INFO L93 Difference]: Finished difference Result 188 states and 247 transitions. [2023-02-17 18:14:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-17 18:14:40,063 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2023-02-17 18:14:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:40,064 INFO L225 Difference]: With dead ends: 188 [2023-02-17 18:14:40,065 INFO L226 Difference]: Without dead ends: 167 [2023-02-17 18:14:40,065 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-17 18:14:40,065 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:40,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 122 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:14:40,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-02-17 18:14:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 162. [2023-02-17 18:14:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 150 states have (on average 1.3266666666666667) internal successors, (199), 151 states have internal predecessors, (199), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 214 transitions. [2023-02-17 18:14:40,081 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 214 transitions. Word has length 45 [2023-02-17 18:14:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:40,081 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 214 transitions. [2023-02-17 18:14:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 18:14:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 214 transitions. [2023-02-17 18:14:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-17 18:14:40,082 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:40,082 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:40,086 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-02-17 18:14:40,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-17 18:14:40,286 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:40,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:40,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1015993583, now seen corresponding path program 2 times [2023-02-17 18:14:40,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:40,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402733671] [2023-02-17 18:14:40,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:40,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:40,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:40,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:40,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:40,552 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 18:14:40,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402733671] [2023-02-17 18:14:40,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402733671] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:40,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266899043] [2023-02-17 18:14:40,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 18:14:40,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:40,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:40,554 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:14:40,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 18:14:40,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 18:14:40,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:14:40,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 18:14:40,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 18:14:40,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 18:14:40,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266899043] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:40,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:40,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 8] total 25 [2023-02-17 18:14:40,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213322912] [2023-02-17 18:14:40,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:40,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 18:14:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:40,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 18:14:40,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2023-02-17 18:14:40,950 INFO L87 Difference]: Start difference. First operand 162 states and 214 transitions. Second operand has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:42,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:42,851 INFO L93 Difference]: Finished difference Result 661 states and 912 transitions. [2023-02-17 18:14:42,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-17 18:14:42,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2023-02-17 18:14:42,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:42,853 INFO L225 Difference]: With dead ends: 661 [2023-02-17 18:14:42,853 INFO L226 Difference]: Without dead ends: 551 [2023-02-17 18:14:42,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=634, Invalid=2672, Unknown=0, NotChecked=0, Total=3306 [2023-02-17 18:14:42,855 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 845 mSDsluCounter, 1135 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1295 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:42,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 1295 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 18:14:42,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-02-17 18:14:42,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 236. [2023-02-17 18:14:42,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 224 states have (on average 1.34375) internal successors, (301), 225 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:42,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 316 transitions. [2023-02-17 18:14:42,891 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 316 transitions. Word has length 45 [2023-02-17 18:14:42,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:42,891 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 316 transitions. [2023-02-17 18:14:42,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.28) internal successors, (82), 25 states have internal predecessors, (82), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:42,892 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 316 transitions. [2023-02-17 18:14:42,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 18:14:42,892 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:42,892 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:14:42,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-02-17 18:14:43,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:43,097 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:43,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:43,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1957197463, now seen corresponding path program 1 times [2023-02-17 18:14:43,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:43,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728902626] [2023-02-17 18:14:43,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:43,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:14:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:43,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:14:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:43,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-02-17 18:14:43,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:14:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728902626] [2023-02-17 18:14:43,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728902626] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:14:43,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011734963] [2023-02-17 18:14:43,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:43,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:14:43,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:14:43,612 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:14:43,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 18:14:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:14:43,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-17 18:14:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:14:44,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 18:14:44,011 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 18:14:44,011 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 18:14:44,012 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:14:44,012 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 51 [2023-02-17 18:14:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:14:44,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:14:44,163 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:14:44,164 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 219 [2023-02-17 18:14:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 18:14:57,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011734963] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:14:57,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:14:57,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 12] total 33 [2023-02-17 18:14:57,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166016067] [2023-02-17 18:14:57,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:14:57,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-17 18:14:57,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:14:57,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-17 18:14:57,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=936, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 18:14:57,370 INFO L87 Difference]: Start difference. First operand 236 states and 316 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:59,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:14:59,653 INFO L93 Difference]: Finished difference Result 587 states and 796 transitions. [2023-02-17 18:14:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-02-17 18:14:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-17 18:14:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:14:59,655 INFO L225 Difference]: With dead ends: 587 [2023-02-17 18:14:59,655 INFO L226 Difference]: Without dead ends: 455 [2023-02-17 18:14:59,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 76 SyntacticMatches, 8 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=402, Invalid=2568, Unknown=0, NotChecked=0, Total=2970 [2023-02-17 18:14:59,657 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 518 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 1463 SdHoareTripleChecker+Invalid, 1755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-17 18:14:59,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [526 Valid, 1463 Invalid, 1755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-17 18:14:59,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-02-17 18:14:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 260. [2023-02-17 18:14:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 248 states have (on average 1.3346774193548387) internal successors, (331), 249 states have internal predecessors, (331), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:14:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 346 transitions. [2023-02-17 18:14:59,699 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 346 transitions. Word has length 48 [2023-02-17 18:14:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:14:59,699 INFO L495 AbstractCegarLoop]: Abstraction has 260 states and 346 transitions. [2023-02-17 18:14:59,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:14:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 346 transitions. [2023-02-17 18:14:59,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-17 18:14:59,700 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:14:59,701 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2023-02-17 18:14:59,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 18:14:59,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-02-17 18:14:59,906 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:14:59,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:14:59,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1256132885, now seen corresponding path program 1 times [2023-02-17 18:14:59,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:14:59,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567498331] [2023-02-17 18:14:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:14:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:14:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:00,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:00,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:00,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:00,283 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 18:15:00,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:00,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567498331] [2023-02-17 18:15:00,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567498331] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:00,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320852166] [2023-02-17 18:15:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:00,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:00,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:00,297 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:00,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 18:15:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:00,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-17 18:15:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:00,509 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:15:00,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 421 treesize of output 575 [2023-02-17 18:15:39,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 18:15:39,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:39,836 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:15:39,837 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 211 [2023-02-17 18:15:42,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 18:15:42,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320852166] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:42,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:42,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 28 [2023-02-17 18:15:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863995583] [2023-02-17 18:15:42,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 18:15:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 18:15:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2023-02-17 18:15:42,513 INFO L87 Difference]: Start difference. First operand 260 states and 346 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:44,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:44,593 INFO L93 Difference]: Finished difference Result 487 states and 655 transitions. [2023-02-17 18:15:44,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 18:15:44,594 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 48 [2023-02-17 18:15:44,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:44,596 INFO L225 Difference]: With dead ends: 487 [2023-02-17 18:15:44,596 INFO L226 Difference]: Without dead ends: 355 [2023-02-17 18:15:44,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 9 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2023-02-17 18:15:44,598 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 155 mSDsluCounter, 966 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:44,598 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 1046 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-17 18:15:44,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2023-02-17 18:15:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 243. [2023-02-17 18:15:44,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 231 states have (on average 1.303030303030303) internal successors, (301), 232 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:15:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 316 transitions. [2023-02-17 18:15:44,649 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 316 transitions. Word has length 48 [2023-02-17 18:15:44,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:44,649 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 316 transitions. [2023-02-17 18:15:44,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 27 states have internal predecessors, (76), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:44,650 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 316 transitions. [2023-02-17 18:15:44,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-02-17 18:15:44,650 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:44,651 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:15:44,655 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 18:15:44,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:44,855 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1737037141, now seen corresponding path program 1 times [2023-02-17 18:15:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:44,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931854196] [2023-02-17 18:15:44,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:44,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:44,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:44,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:44,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:44,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-17 18:15:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:44,893 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-02-17 18:15:44,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:44,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931854196] [2023-02-17 18:15:44,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931854196] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 18:15:44,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 18:15:44,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-17 18:15:44,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63965232] [2023-02-17 18:15:44,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 18:15:44,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-17 18:15:44,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:44,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-17 18:15:44,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-02-17 18:15:44,895 INFO L87 Difference]: Start difference. First operand 243 states and 316 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 18:15:44,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:44,971 INFO L93 Difference]: Finished difference Result 266 states and 343 transitions. [2023-02-17 18:15:44,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-17 18:15:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-02-17 18:15:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:44,973 INFO L225 Difference]: With dead ends: 266 [2023-02-17 18:15:44,973 INFO L226 Difference]: Without dead ends: 244 [2023-02-17 18:15:44,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 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 18:15:44,974 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 6 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:44,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 116 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 18:15:44,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-02-17 18:15:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2023-02-17 18:15:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 230 states have (on average 1.2956521739130435) internal successors, (298), 231 states have internal predecessors, (298), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:15:45,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 313 transitions. [2023-02-17 18:15:45,021 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 313 transitions. Word has length 50 [2023-02-17 18:15:45,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:45,021 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 313 transitions. [2023-02-17 18:15:45,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 18:15:45,021 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 313 transitions. [2023-02-17 18:15:45,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-17 18:15:45,024 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:45,024 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:15:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-02-17 18:15:45,025 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:45,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -23820843, now seen corresponding path program 1 times [2023-02-17 18:15:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:45,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131157847] [2023-02-17 18:15:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:45,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:45,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:45,162 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 18:15:45,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:45,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131157847] [2023-02-17 18:15:45,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131157847] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:45,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456818860] [2023-02-17 18:15:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:45,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:45,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:45,164 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:45,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 18:15:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:45,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2023-02-17 18:15:45,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:45,328 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 18:15:45,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:45,471 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-17 18:15:45,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456818860] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:45,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:45,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2023-02-17 18:15:45,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782331666] [2023-02-17 18:15:45,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:45,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 18:15:45,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:45,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 18:15:45,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2023-02-17 18:15:45,473 INFO L87 Difference]: Start difference. First operand 242 states and 313 transitions. Second operand has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:48,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:48,373 INFO L93 Difference]: Finished difference Result 689 states and 913 transitions. [2023-02-17 18:15:48,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-02-17 18:15:48,373 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 49 [2023-02-17 18:15:48,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:48,376 INFO L225 Difference]: With dead ends: 689 [2023-02-17 18:15:48,376 INFO L226 Difference]: Without dead ends: 681 [2023-02-17 18:15:48,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=662, Invalid=3628, Unknown=0, NotChecked=0, Total=4290 [2023-02-17 18:15:48,378 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 1308 mSDsluCounter, 2233 mSDsCounter, 0 mSdLazyCounter, 1462 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1308 SdHoareTripleChecker+Valid, 2432 SdHoareTripleChecker+Invalid, 1734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:48,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1308 Valid, 2432 Invalid, 1734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1462 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-17 18:15:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2023-02-17 18:15:48,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 245. [2023-02-17 18:15:48,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 233 states have (on average 1.2918454935622317) internal successors, (301), 234 states have internal predecessors, (301), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:15:48,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 316 transitions. [2023-02-17 18:15:48,436 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 316 transitions. Word has length 49 [2023-02-17 18:15:48,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:48,436 INFO L495 AbstractCegarLoop]: Abstraction has 245 states and 316 transitions. [2023-02-17 18:15:48,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.25) internal successors, (78), 24 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:48,436 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 316 transitions. [2023-02-17 18:15:48,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 18:15:48,437 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:48,437 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:15:48,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 18:15:48,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:48,638 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:48,639 INFO L85 PathProgramCache]: Analyzing trace with hash -319274875, now seen corresponding path program 1 times [2023-02-17 18:15:48,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:48,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49276858] [2023-02-17 18:15:48,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:48,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:48,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:48,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:48,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:48,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 18:15:48,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:48,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49276858] [2023-02-17 18:15:48,827 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49276858] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:48,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384537320] [2023-02-17 18:15:48,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:48,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:48,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:48,837 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:48,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 18:15:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:48,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-17 18:15:48,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:49,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 18:15:49,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:49,125 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 18:15:49,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384537320] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:49,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:49,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 23 [2023-02-17 18:15:49,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70314828] [2023-02-17 18:15:49,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:49,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 18:15:49,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 18:15:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2023-02-17 18:15:49,127 INFO L87 Difference]: Start difference. First operand 245 states and 316 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:50,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:50,058 INFO L93 Difference]: Finished difference Result 727 states and 955 transitions. [2023-02-17 18:15:50,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-17 18:15:50,058 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 51 [2023-02-17 18:15:50,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:50,060 INFO L225 Difference]: With dead ends: 727 [2023-02-17 18:15:50,060 INFO L226 Difference]: Without dead ends: 565 [2023-02-17 18:15:50,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=325, Invalid=1655, Unknown=0, NotChecked=0, Total=1980 [2023-02-17 18:15:50,062 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 852 mSDsluCounter, 1399 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 1528 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:50,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 1528 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 18:15:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-02-17 18:15:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 273. [2023-02-17 18:15:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 261 states have (on average 1.3026819923371646) internal successors, (340), 262 states have internal predecessors, (340), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:15:50,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 355 transitions. [2023-02-17 18:15:50,157 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 355 transitions. Word has length 51 [2023-02-17 18:15:50,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:50,158 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 355 transitions. [2023-02-17 18:15:50,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:50,158 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 355 transitions. [2023-02-17 18:15:50,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 18:15:50,159 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:50,159 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:15:50,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-17 18:15:50,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-02-17 18:15:50,366 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:50,367 INFO L85 PathProgramCache]: Analyzing trace with hash -175162644, now seen corresponding path program 1 times [2023-02-17 18:15:50,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:50,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14631326] [2023-02-17 18:15:50,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:50,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:50,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:50,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:50,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:50,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-17 18:15:50,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:50,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2023-02-17 18:15:50,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:50,465 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 18:15:50,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:50,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14631326] [2023-02-17 18:15:50,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14631326] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:50,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647288678] [2023-02-17 18:15:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:50,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:50,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:50,481 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:50,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 18:15:50,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:50,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-17 18:15:50,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:50,591 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 18:15:50,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 18:15:50,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647288678] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:50,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:50,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-02-17 18:15:50,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524600976] [2023-02-17 18:15:50,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:50,646 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-17 18:15:50,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:50,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-17 18:15:50,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-02-17 18:15:50,647 INFO L87 Difference]: Start difference. First operand 273 states and 355 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 18:15:50,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:50,920 INFO L93 Difference]: Finished difference Result 331 states and 427 transitions. [2023-02-17 18:15:50,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 18:15:50,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 54 [2023-02-17 18:15:50,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:50,921 INFO L225 Difference]: With dead ends: 331 [2023-02-17 18:15:50,922 INFO L226 Difference]: Without dead ends: 281 [2023-02-17 18:15:50,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 107 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2023-02-17 18:15:50,922 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 50 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:50,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 569 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 18:15:50,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-17 18:15:50,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 271. [2023-02-17 18:15:50,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 258 states have (on average 1.302325581395349) internal successors, (336), 259 states have internal predecessors, (336), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 18:15:50,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 353 transitions. [2023-02-17 18:15:50,991 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 353 transitions. Word has length 54 [2023-02-17 18:15:50,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:50,991 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 353 transitions. [2023-02-17 18:15:50,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-02-17 18:15:50,991 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 353 transitions. [2023-02-17 18:15:50,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-17 18:15:50,992 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:50,992 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:15:51,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 18:15:51,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:51,196 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1379742433, now seen corresponding path program 2 times [2023-02-17 18:15:51,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:51,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161000455] [2023-02-17 18:15:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:51,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:51,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:51,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:51,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-02-17 18:15:51,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:51,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161000455] [2023-02-17 18:15:51,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161000455] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:51,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562063071] [2023-02-17 18:15:51,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 18:15:51,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:51,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:51,715 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:51,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 18:15:51,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 18:15:51,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:15:51,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-17 18:15:51,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:51,857 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 18:15:51,966 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:15:51,967 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 92 treesize of output 136 [2023-02-17 18:15:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-17 18:15:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 18:15:52,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562063071] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:52,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:52,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 14] total 40 [2023-02-17 18:15:52,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273602950] [2023-02-17 18:15:52,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:52,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-17 18:15:52,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:52,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-17 18:15:52,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=1377, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 18:15:52,263 INFO L87 Difference]: Start difference. First operand 271 states and 353 transitions. Second operand has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 18:15:53,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:53,578 INFO L93 Difference]: Finished difference Result 574 states and 769 transitions. [2023-02-17 18:15:53,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 18:15:53,578 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 52 [2023-02-17 18:15:53,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:53,580 INFO L225 Difference]: With dead ends: 574 [2023-02-17 18:15:53,580 INFO L226 Difference]: Without dead ends: 513 [2023-02-17 18:15:53,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=363, Invalid=2499, Unknown=0, NotChecked=0, Total=2862 [2023-02-17 18:15:53,581 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 555 mSDsluCounter, 1472 mSDsCounter, 0 mSdLazyCounter, 1404 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:53,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 1565 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1404 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 18:15:53,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2023-02-17 18:15:53,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 310. [2023-02-17 18:15:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 297 states have (on average 1.3097643097643097) internal successors, (389), 298 states have internal predecessors, (389), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 18:15:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 406 transitions. [2023-02-17 18:15:53,660 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 406 transitions. Word has length 52 [2023-02-17 18:15:53,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:53,660 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 406 transitions. [2023-02-17 18:15:53,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.769230769230769) internal successors, (108), 39 states have internal predecessors, (108), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-02-17 18:15:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 406 transitions. [2023-02-17 18:15:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-17 18:15:53,661 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:53,661 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:15:53,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 18:15:53,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:53,867 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:53,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:53,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1170436455, now seen corresponding path program 2 times [2023-02-17 18:15:53,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:53,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670291724] [2023-02-17 18:15:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:53,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:54,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:54,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:54,048 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 18:15:54,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:54,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670291724] [2023-02-17 18:15:54,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670291724] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:54,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566023710] [2023-02-17 18:15:54,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 18:15:54,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:54,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:54,066 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:54,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 18:15:54,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 18:15:54,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:15:54,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-17 18:15:54,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 18:15:54,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:54,347 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-02-17 18:15:54,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566023710] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:54,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:54,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-02-17 18:15:54,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394853893] [2023-02-17 18:15:54,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:54,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-17 18:15:54,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:54,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-17 18:15:54,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2023-02-17 18:15:54,350 INFO L87 Difference]: Start difference. First operand 310 states and 406 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:54,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:54,748 INFO L93 Difference]: Finished difference Result 424 states and 552 transitions. [2023-02-17 18:15:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-17 18:15:54,748 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 53 [2023-02-17 18:15:54,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:54,750 INFO L225 Difference]: With dead ends: 424 [2023-02-17 18:15:54,750 INFO L226 Difference]: Without dead ends: 329 [2023-02-17 18:15:54,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2023-02-17 18:15:54,751 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 498 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:54,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [498 Valid, 914 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:15:54,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-02-17 18:15:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 252. [2023-02-17 18:15:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 239 states have (on average 1.292887029288703) internal successors, (309), 240 states have internal predecessors, (309), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 18:15:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 326 transitions. [2023-02-17 18:15:54,820 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 326 transitions. Word has length 53 [2023-02-17 18:15:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:54,820 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 326 transitions. [2023-02-17 18:15:54,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:54,821 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 326 transitions. [2023-02-17 18:15:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-17 18:15:54,821 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:54,821 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1, 1, 1] [2023-02-17 18:15:54,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-17 18:15:55,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:55,026 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:55,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:55,027 INFO L85 PathProgramCache]: Analyzing trace with hash -610707989, now seen corresponding path program 3 times [2023-02-17 18:15:55,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:55,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660001678] [2023-02-17 18:15:55,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:55,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:55,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:55,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:55,160 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-17 18:15:55,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:55,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660001678] [2023-02-17 18:15:55,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660001678] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:55,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596580335] [2023-02-17 18:15:55,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 18:15:55,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:55,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:55,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:55,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 18:15:55,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-17 18:15:55,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:15:55,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 18:15:55,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:55,633 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 18:15:55,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:55,708 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 18:15:55,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596580335] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:55,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:55,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-02-17 18:15:55,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101882201] [2023-02-17 18:15:55,709 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:55,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 18:15:55,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:55,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 18:15:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=406, Unknown=0, NotChecked=0, Total=462 [2023-02-17 18:15:55,710 INFO L87 Difference]: Start difference. First operand 252 states and 326 transitions. Second operand has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:56,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:56,058 INFO L93 Difference]: Finished difference Result 301 states and 385 transitions. [2023-02-17 18:15:56,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 18:15:56,059 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 54 [2023-02-17 18:15:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:56,060 INFO L225 Difference]: With dead ends: 301 [2023-02-17 18:15:56,060 INFO L226 Difference]: Without dead ends: 267 [2023-02-17 18:15:56,060 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2023-02-17 18:15:56,061 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 113 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:56,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 985 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:15:56,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-02-17 18:15:56,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 234. [2023-02-17 18:15:56,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 221 states have (on average 1.2895927601809956) internal successors, (285), 222 states have internal predecessors, (285), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-02-17 18:15:56,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 302 transitions. [2023-02-17 18:15:56,124 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 302 transitions. Word has length 54 [2023-02-17 18:15:56,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:56,124 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 302 transitions. [2023-02-17 18:15:56,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.0) internal successors, (88), 21 states have internal predecessors, (88), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:15:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 302 transitions. [2023-02-17 18:15:56,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-17 18:15:56,125 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:56,125 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:15:56,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-02-17 18:15:56,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-17 18:15:56,330 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:56,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:56,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1409986660, now seen corresponding path program 1 times [2023-02-17 18:15:56,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:56,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947930779] [2023-02-17 18:15:56,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:56,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:56,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:56,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:56,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:56,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2023-02-17 18:15:56,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:56,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-17 18:15:56,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 18:15:56,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:56,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947930779] [2023-02-17 18:15:56,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947930779] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:56,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661229404] [2023-02-17 18:15:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:56,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:56,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:56,470 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:56,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 18:15:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-17 18:15:56,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:56,625 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-17 18:15:56,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:56,672 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 18:15:56,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661229404] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:56,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:56,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 18 [2023-02-17 18:15:56,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024109549] [2023-02-17 18:15:56,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:56,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 18:15:56,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 18:15:56,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2023-02-17 18:15:56,674 INFO L87 Difference]: Start difference. First operand 234 states and 302 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 18:15:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:15:56,977 INFO L93 Difference]: Finished difference Result 324 states and 415 transitions. [2023-02-17 18:15:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 18:15:56,978 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2023-02-17 18:15:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:15:56,979 INFO L225 Difference]: With dead ends: 324 [2023-02-17 18:15:56,979 INFO L226 Difference]: Without dead ends: 258 [2023-02-17 18:15:56,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-02-17 18:15:56,983 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 119 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 18:15:56,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 496 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 18:15:56,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-02-17 18:15:57,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 224. [2023-02-17 18:15:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 212 states have (on average 1.2830188679245282) internal successors, (272), 213 states have internal predecessors, (272), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:15:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2023-02-17 18:15:57,044 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 57 [2023-02-17 18:15:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:15:57,044 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2023-02-17 18:15:57,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 6 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-02-17 18:15:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2023-02-17 18:15:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-17 18:15:57,045 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:15:57,045 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:15:57,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 18:15:57,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-17 18:15:57,249 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:15:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:15:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1004480119, now seen corresponding path program 3 times [2023-02-17 18:15:57,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:15:57,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589712715] [2023-02-17 18:15:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:15:57,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:15:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:57,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:15:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:57,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:15:57,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:15:57,506 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 18:15:57,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:15:57,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589712715] [2023-02-17 18:15:57,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589712715] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:15:57,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485962902] [2023-02-17 18:15:57,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 18:15:57,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:15:57,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:15:57,517 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:15:57,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 18:15:57,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 18:15:57,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:15:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 19 conjunts are in the unsatisfiable core [2023-02-17 18:15:57,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:15:57,763 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 18:15:57,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:15:57,907 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 18:15:57,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485962902] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:15:57,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:15:57,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 31 [2023-02-17 18:15:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184718170] [2023-02-17 18:15:57,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:15:57,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 18:15:57,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:15:57,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 18:15:57,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2023-02-17 18:15:57,908 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:16:00,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:16:00,410 INFO L93 Difference]: Finished difference Result 1047 states and 1365 transitions. [2023-02-17 18:16:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-02-17 18:16:00,411 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 55 [2023-02-17 18:16:00,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:16:00,413 INFO L225 Difference]: With dead ends: 1047 [2023-02-17 18:16:00,413 INFO L226 Difference]: Without dead ends: 890 [2023-02-17 18:16:00,417 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1157, Invalid=7399, Unknown=0, NotChecked=0, Total=8556 [2023-02-17 18:16:00,419 INFO L413 NwaCegarLoop]: 195 mSDtfsCounter, 1060 mSDsluCounter, 2290 mSDsCounter, 0 mSdLazyCounter, 2212 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 2485 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 2212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:16:00,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1060 Valid, 2485 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 2212 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 18:16:00,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2023-02-17 18:16:00,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 209. [2023-02-17 18:16:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 197 states have (on average 1.284263959390863) internal successors, (253), 198 states have internal predecessors, (253), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-02-17 18:16:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 268 transitions. [2023-02-17 18:16:00,484 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 268 transitions. Word has length 55 [2023-02-17 18:16:00,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:16:00,485 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 268 transitions. [2023-02-17 18:16:00,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.0) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:16:00,485 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 268 transitions. [2023-02-17 18:16:00,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-02-17 18:16:00,485 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:16:00,486 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 18:16:00,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 18:16:00,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:16:00,690 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:16:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:16:00,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1373602884, now seen corresponding path program 1 times [2023-02-17 18:16:00,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:16:00,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207424305] [2023-02-17 18:16:00,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:16:00,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:16:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:01,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:16:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:01,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:16:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:01,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2023-02-17 18:16:01,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:01,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2023-02-17 18:16:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:01,080 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-17 18:16:01,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:16:01,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207424305] [2023-02-17 18:16:01,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207424305] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:16:01,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903543324] [2023-02-17 18:16:01,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:16:01,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:16:01,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:16:01,097 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:16:01,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 18:16:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-17 18:16:01,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:16:01,273 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-17 18:16:01,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:16:01,396 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-02-17 18:16:01,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903543324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:16:01,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:16:01,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 9, 8] total 31 [2023-02-17 18:16:01,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841160166] [2023-02-17 18:16:01,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:16:01,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 18:16:01,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:16:01,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 18:16:01,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2023-02-17 18:16:01,399 INFO L87 Difference]: Start difference. First operand 209 states and 268 transitions. Second operand has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-17 18:16:03,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:16:03,328 INFO L93 Difference]: Finished difference Result 418 states and 535 transitions. [2023-02-17 18:16:03,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-17 18:16:03,328 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2023-02-17 18:16:03,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:16:03,329 INFO L225 Difference]: With dead ends: 418 [2023-02-17 18:16:03,329 INFO L226 Difference]: Without dead ends: 311 [2023-02-17 18:16:03,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 113 SyntacticMatches, 5 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=949, Invalid=4453, Unknown=0, NotChecked=0, Total=5402 [2023-02-17 18:16:03,331 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 750 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 857 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-17 18:16:03,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 857 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-17 18:16:03,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2023-02-17 18:16:03,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 229. [2023-02-17 18:16:03,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 214 states have (on average 1.2523364485981308) internal successors, (268), 215 states have internal predecessors, (268), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 18:16:03,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 289 transitions. [2023-02-17 18:16:03,405 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 289 transitions. Word has length 59 [2023-02-17 18:16:03,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:16:03,405 INFO L495 AbstractCegarLoop]: Abstraction has 229 states and 289 transitions. [2023-02-17 18:16:03,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.774193548387097) internal successors, (86), 31 states have internal predecessors, (86), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-02-17 18:16:03,405 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 289 transitions. [2023-02-17 18:16:03,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 18:16:03,406 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:16:03,406 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2023-02-17 18:16:03,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-02-17 18:16:03,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:16:03,610 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:16:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:16:03,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1737992177, now seen corresponding path program 4 times [2023-02-17 18:16:03,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:16:03,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664163764] [2023-02-17 18:16:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:16:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:16:03,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:04,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:16:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:04,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:16:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:04,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 18:16:04,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:16:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664163764] [2023-02-17 18:16:04,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664163764] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:16:04,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835112506] [2023-02-17 18:16:04,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 18:16:04,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:16:04,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:16:04,178 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:16:04,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-17 18:16:04,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 18:16:04,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:16:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-17 18:16:04,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:16:04,321 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:16:04,321 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 1 [2023-02-17 18:16:04,324 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 18:16:04,335 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:16:04,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 1 [2023-02-17 18:16:04,338 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 18:16:04,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:16:04,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 1 [2023-02-17 18:16:04,353 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-02-17 18:16:04,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 18:16:04,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 18:16:04,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-17 18:16:04,463 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-17 18:16:04,463 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:16:04,463 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 98 treesize of output 51 [2023-02-17 18:16:04,481 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 31 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-17 18:16:04,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:16:04,728 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:16:04,729 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 83 treesize of output 227 [2023-02-17 18:16:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-02-17 18:16:07,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835112506] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 18:16:07,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-17 18:16:07,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 18] total 40 [2023-02-17 18:16:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143150503] [2023-02-17 18:16:07,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-17 18:16:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-02-17 18:16:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 18:16:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-02-17 18:16:07,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1404, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 18:16:07,867 INFO L87 Difference]: Start difference. First operand 229 states and 289 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:16:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 18:16:09,888 INFO L93 Difference]: Finished difference Result 436 states and 558 transitions. [2023-02-17 18:16:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-17 18:16:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 58 [2023-02-17 18:16:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 18:16:09,890 INFO L225 Difference]: With dead ends: 436 [2023-02-17 18:16:09,890 INFO L226 Difference]: Without dead ends: 412 [2023-02-17 18:16:09,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 87 SyntacticMatches, 13 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=399, Invalid=3023, Unknown=0, NotChecked=0, Total=3422 [2023-02-17 18:16:09,893 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 503 mSDsluCounter, 1782 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-17 18:16:09,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1897 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-17 18:16:09,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2023-02-17 18:16:10,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 241. [2023-02-17 18:16:10,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 226 states have (on average 1.252212389380531) internal successors, (283), 227 states have internal predecessors, (283), 11 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-02-17 18:16:10,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 304 transitions. [2023-02-17 18:16:10,004 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 304 transitions. Word has length 58 [2023-02-17 18:16:10,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 18:16:10,004 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 304 transitions. [2023-02-17 18:16:10,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-02-17 18:16:10,004 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 304 transitions. [2023-02-17 18:16:10,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-17 18:16:10,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 18:16:10,005 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2023-02-17 18:16:10,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-17 18:16:10,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:16:10,210 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 18:16:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 18:16:10,210 INFO L85 PathProgramCache]: Analyzing trace with hash 162150685, now seen corresponding path program 5 times [2023-02-17 18:16:10,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 18:16:10,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963813423] [2023-02-17 18:16:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 18:16:10,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 18:16:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:10,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-02-17 18:16:10,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:10,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2023-02-17 18:16:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 18:16:10,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 18:16:10,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 18:16:10,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963813423] [2023-02-17 18:16:10,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963813423] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 18:16:10,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632747736] [2023-02-17 18:16:10,786 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 18:16:10,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 18:16:10,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 18:16:10,787 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 18:16:10,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-17 18:16:11,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-17 18:16:11,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 18:16:11,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-17 18:16:11,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 18:16:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 24 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-02-17 18:16:11,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 18:16:12,893 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-17 18:16:12,894 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 243 treesize of output 1540