./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_sentinel-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a31fd051 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/standard_sentinel-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 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 --- Real Ultimate output --- This is Ultimate 0.2.2-?-a31fd05 [2023-02-15 09:14:13,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 09:14:13,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 09:14:13,459 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 09:14:13,460 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 09:14:13,461 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 09:14:13,462 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 09:14:13,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 09:14:13,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 09:14:13,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 09:14:13,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 09:14:13,473 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 09:14:13,473 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 09:14:13,474 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 09:14:13,475 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 09:14:13,475 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 09:14:13,476 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 09:14:13,477 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 09:14:13,478 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 09:14:13,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 09:14:13,480 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 09:14:13,480 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 09:14:13,481 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 09:14:13,494 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 09:14:13,496 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 09:14:13,498 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 09:14:13,498 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 09:14:13,499 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 09:14:13,500 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 09:14:13,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 09:14:13,501 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 09:14:13,502 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 09:14:13,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 09:14:13,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 09:14:13,504 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 09:14:13,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 09:14:13,505 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 09:14:13,505 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 09:14:13,505 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 09:14:13,506 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 09:14:13,507 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 09:14:13,509 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 09:14:13,532 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 09:14:13,532 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 09:14:13,533 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 09:14:13,533 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 09:14:13,533 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 09:14:13,534 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 09:14:13,534 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 09:14:13,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 09:14:13,535 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 09:14:13,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 09:14:13,535 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 09:14:13,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 09:14:13,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 09:14:13,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 09:14:13,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 09:14:13,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 09:14:13,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 09:14:13,536 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 09:14:13,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 09:14:13,537 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 09:14:13,537 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 09:14:13,537 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 09:14:13,537 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 09:14:13,537 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 09:14:13,537 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:14:13,538 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 09:14:13,538 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 09:14:13,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 09:14:13,538 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 09:14:13,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 09:14:13,538 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 09:14:13,539 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 09:14:13,539 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 09:14:13,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 09:14:13,539 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 09:14:13,539 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 590a845a219659d0ad58521e10c3551f2ec7e80ca70e994a8616abe765f6f296 [2023-02-15 09:14:13,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 09:14:13,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 09:14:13,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 09:14:13,793 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 09:14:13,793 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 09:14:13,794 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_sentinel-2.i [2023-02-15 09:14:14,886 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 09:14:15,079 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 09:14:15,089 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_sentinel-2.i [2023-02-15 09:14:15,098 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73e873f7/240599faf2dd4af6972650e490456303/FLAG40ee10328 [2023-02-15 09:14:15,130 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b73e873f7/240599faf2dd4af6972650e490456303 [2023-02-15 09:14:15,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 09:14:15,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 09:14:15,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 09:14:15,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 09:14:15,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 09:14:15,153 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,156 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1967d871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15, skipping insertion in model container [2023-02-15 09:14:15,157 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,162 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 09:14:15,184 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 09:14:15,303 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/standard_sentinel-2.i[852,865] [2023-02-15 09:14:15,317 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:14:15,323 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 09:14:15,333 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/standard_sentinel-2.i[852,865] [2023-02-15 09:14:15,337 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 09:14:15,347 INFO L208 MainTranslator]: Completed translation [2023-02-15 09:14:15,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15 WrapperNode [2023-02-15 09:14:15,347 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 09:14:15,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 09:14:15,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 09:14:15,349 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 09:14:15,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,371 INFO L138 Inliner]: procedures = 16, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 50 [2023-02-15 09:14:15,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 09:14:15,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 09:14:15,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 09:14:15,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 09:14:15,378 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,379 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,383 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,385 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,386 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 09:14:15,388 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 09:14:15,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 09:14:15,389 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 09:14:15,390 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (1/1) ... [2023-02-15 09:14:15,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 09:14:15,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:15,412 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-15 09:14:15,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-15 09:14:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 09:14:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 09:14:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-15 09:14:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-15 09:14:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 09:14:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 09:14:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-15 09:14:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-15 09:14:15,493 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 09:14:15,495 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 09:14:15,671 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 09:14:15,676 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 09:14:15,681 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-15 09:14:15,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:14:15 BoogieIcfgContainer [2023-02-15 09:14:15,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 09:14:15,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 09:14:15,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 09:14:15,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 09:14:15,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:14:15" (1/3) ... [2023-02-15 09:14:15,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2579d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:14:15, skipping insertion in model container [2023-02-15 09:14:15,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:14:15" (2/3) ... [2023-02-15 09:14:15,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2579d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:14:15, skipping insertion in model container [2023-02-15 09:14:15,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:14:15" (3/3) ... [2023-02-15 09:14:15,697 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_sentinel-2.i [2023-02-15 09:14:15,710 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 09:14:15,711 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 09:14:15,764 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 09:14:15,772 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;@57187f10, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 09:14:15,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 09:14:15,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:15,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-15 09:14:15,782 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:15,782 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:15,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:15,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:15,787 INFO L85 PathProgramCache]: Analyzing trace with hash 214135089, now seen corresponding path program 1 times [2023-02-15 09:14:15,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:15,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253942914] [2023-02-15 09:14:15,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:15,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:15,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:15,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253942914] [2023-02-15 09:14:15,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253942914] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:14:15,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:14:15,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-15 09:14:15,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551734194] [2023-02-15 09:14:15,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:14:15,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-15 09:14:15,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-15 09:14:15,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:14:15,999 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:16,025 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2023-02-15 09:14:16,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-15 09:14:16,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-15 09:14:16,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:16,032 INFO L225 Difference]: With dead ends: 30 [2023-02-15 09:14:16,032 INFO L226 Difference]: Without dead ends: 13 [2023-02-15 09:14:16,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-15 09:14:16,037 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:16,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 30 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:14:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-02-15 09:14:16,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 12. [2023-02-15 09:14:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2023-02-15 09:14:16,060 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 8 [2023-02-15 09:14:16,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:16,060 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2023-02-15 09:14:16,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,061 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2023-02-15 09:14:16,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-15 09:14:16,061 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:16,061 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:16,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 09:14:16,062 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:16,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:16,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1622702096, now seen corresponding path program 1 times [2023-02-15 09:14:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:16,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766636076] [2023-02-15 09:14:16,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:16,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:16,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:16,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766636076] [2023-02-15 09:14:16,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766636076] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:16,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201187381] [2023-02-15 09:14:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:16,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:16,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:16,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:16,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 09:14:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:16,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-15 09:14:16,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:16,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:16,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 09:14:16,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201187381] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:16,306 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:16,306 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-15 09:14:16,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901762411] [2023-02-15 09:14:16,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:16,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-15 09:14:16,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-15 09:14:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:14:16,309 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:16,339 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-02-15 09:14:16,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-15 09:14:16,340 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-15 09:14:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:16,340 INFO L225 Difference]: With dead ends: 25 [2023-02-15 09:14:16,341 INFO L226 Difference]: Without dead ends: 18 [2023-02-15 09:14:16,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-15 09:14:16,343 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:16,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:14:16,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-02-15 09:14:16,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-02-15 09:14:16,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-15 09:14:16,349 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2023-02-15 09:14:16,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:16,349 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-15 09:14:16,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-15 09:14:16,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-15 09:14:16,351 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:16,351 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:16,359 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-15 09:14:16,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:16,557 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:16,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:16,558 INFO L85 PathProgramCache]: Analyzing trace with hash 49509066, now seen corresponding path program 2 times [2023-02-15 09:14:16,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:16,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586616051] [2023-02-15 09:14:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:16,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-02-15 09:14:16,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586616051] [2023-02-15 09:14:16,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586616051] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 09:14:16,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 09:14:16,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-15 09:14:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419489560] [2023-02-15 09:14:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 09:14:16,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-15 09:14:16,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:16,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-15 09:14:16,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-15 09:14:16,717 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:16,754 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-02-15 09:14:16,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-15 09:14:16,755 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-15 09:14:16,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:16,755 INFO L225 Difference]: With dead ends: 24 [2023-02-15 09:14:16,755 INFO L226 Difference]: Without dead ends: 20 [2023-02-15 09:14:16,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-15 09:14:16,756 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 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 [2023-02-15 09:14:16,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:14:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-15 09:14:16,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-02-15 09:14:16,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-02-15 09:14:16,783 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2023-02-15 09:14:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:16,785 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-02-15 09:14:16,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:16,785 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-02-15 09:14:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 09:14:16,786 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:16,786 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:16,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-02-15 09:14:16,787 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:16,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:16,788 INFO L85 PathProgramCache]: Analyzing trace with hash 382246981, now seen corresponding path program 1 times [2023-02-15 09:14:16,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:16,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818132761] [2023-02-15 09:14:16,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:16,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:16,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:16,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:16,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:16,944 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818132761] [2023-02-15 09:14:16,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818132761] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:16,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840750713] [2023-02-15 09:14:16,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:16,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:16,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:16,949 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:16,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 09:14:17,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-15 09:14:17,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:17,032 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:17,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:17,080 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:17,080 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840750713] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:17,080 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:17,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-15 09:14:17,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812695018] [2023-02-15 09:14:17,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:17,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-15 09:14:17,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:17,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-15 09:14:17,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:14:17,082 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:17,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:17,108 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2023-02-15 09:14:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-15 09:14:17,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-02-15 09:14:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:17,109 INFO L225 Difference]: With dead ends: 41 [2023-02-15 09:14:17,109 INFO L226 Difference]: Without dead ends: 32 [2023-02-15 09:14:17,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-15 09:14:17,110 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:17,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 34 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:14:17,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-15 09:14:17,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-15 09:14:17,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:17,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-02-15 09:14:17,114 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 19 [2023-02-15 09:14:17,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:17,114 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-02-15 09:14:17,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:17,115 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-02-15 09:14:17,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-02-15 09:14:17,115 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:17,115 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:17,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:17,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-02-15 09:14:17,321 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:17,321 INFO L85 PathProgramCache]: Analyzing trace with hash 822799929, now seen corresponding path program 2 times [2023-02-15 09:14:17,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:17,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350404991] [2023-02-15 09:14:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:17,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:17,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350404991] [2023-02-15 09:14:17,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350404991] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:17,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560785995] [2023-02-15 09:14:17,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:14:17,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:17,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:17,627 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:17,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 09:14:17,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:14:17,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:17,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-15 09:14:17,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:17,753 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:17,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:17,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560785995] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:17,932 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:17,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-15 09:14:17,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710360117] [2023-02-15 09:14:17,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:17,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-15 09:14:17,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-15 09:14:17,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:14:17,935 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:18,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:18,003 INFO L93 Difference]: Finished difference Result 65 states and 78 transitions. [2023-02-15 09:14:18,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-15 09:14:18,003 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-02-15 09:14:18,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:18,007 INFO L225 Difference]: With dead ends: 65 [2023-02-15 09:14:18,007 INFO L226 Difference]: Without dead ends: 56 [2023-02-15 09:14:18,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-15 09:14:18,009 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:18,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-15 09:14:18,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-15 09:14:18,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-02-15 09:14:18,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:18,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-02-15 09:14:18,023 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 31 [2023-02-15 09:14:18,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:18,024 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-02-15 09:14:18,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:18,025 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-02-15 09:14:18,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-02-15 09:14:18,028 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:18,028 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:18,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-15 09:14:18,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:18,234 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:18,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:18,235 INFO L85 PathProgramCache]: Analyzing trace with hash 798531617, now seen corresponding path program 3 times [2023-02-15 09:14:18,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:18,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223908393] [2023-02-15 09:14:18,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:18,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:18,734 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-15 09:14:18,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:18,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223908393] [2023-02-15 09:14:18,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223908393] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:18,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140118796] [2023-02-15 09:14:18,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:14:18,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:18,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:18,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:18,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 09:14:18,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-02-15 09:14:18,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:18,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-15 09:14:18,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:18,866 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 [2023-02-15 09:14:18,905 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-15 09:14:18,905 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 23 treesize of output 19 [2023-02-15 09:14:19,048 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-15 09:14:19,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:19,140 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2023-02-15 09:14:19,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140118796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:19,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:19,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2023-02-15 09:14:19,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120466831] [2023-02-15 09:14:19,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:19,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 09:14:19,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:19,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 09:14:19,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=732, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 09:14:19,143 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:19,327 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2023-02-15 09:14:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-02-15 09:14:19,327 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-02-15 09:14:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:19,328 INFO L225 Difference]: With dead ends: 76 [2023-02-15 09:14:19,328 INFO L226 Difference]: Without dead ends: 63 [2023-02-15 09:14:19,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=361, Invalid=1045, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 09:14:19,329 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:19,329 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:14:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-15 09:14:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2023-02-15 09:14:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-02-15 09:14:19,334 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2023-02-15 09:14:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:19,334 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-02-15 09:14:19,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.1818181818181817) internal successors, (72), 33 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-02-15 09:14:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-15 09:14:19,335 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:19,335 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:19,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-15 09:14:19,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:19,541 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:19,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:19,541 INFO L85 PathProgramCache]: Analyzing trace with hash 498607765, now seen corresponding path program 4 times [2023-02-15 09:14:19,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:19,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756657533] [2023-02-15 09:14:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:19,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:19,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:19,959 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:19,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:19,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756657533] [2023-02-15 09:14:19,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756657533] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:19,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044568638] [2023-02-15 09:14:19,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 09:14:19,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:19,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:19,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-15 09:14:19,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 09:14:20,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 09:14:20,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:20,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 09:14:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:20,103 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:20,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:20,723 INFO L134 CoverageAnalysis]: Checked inductivity of 541 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:20,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044568638] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:20,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:20,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-15 09:14:20,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311500924] [2023-02-15 09:14:20,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:20,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-15 09:14:20,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:20,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-15 09:14:20,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 09:14:20,726 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:20,838 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2023-02-15 09:14:20,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-02-15 09:14:20,839 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-02-15 09:14:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:20,839 INFO L225 Difference]: With dead ends: 125 [2023-02-15 09:14:20,840 INFO L226 Difference]: Without dead ends: 112 [2023-02-15 09:14:20,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2023-02-15 09:14:20,841 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:20,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 42 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:14:20,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-15 09:14:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2023-02-15 09:14:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2023-02-15 09:14:20,862 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 61 [2023-02-15 09:14:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:20,862 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2023-02-15 09:14:20,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0980392156862746) internal successors, (107), 51 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:20,863 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2023-02-15 09:14:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-02-15 09:14:20,863 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:20,864 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:20,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:21,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:21,064 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:21,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:21,065 INFO L85 PathProgramCache]: Analyzing trace with hash -804209501, now seen corresponding path program 5 times [2023-02-15 09:14:21,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:21,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002937401] [2023-02-15 09:14:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:21,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:21,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:22,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:22,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002937401] [2023-02-15 09:14:22,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002937401] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:22,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822026237] [2023-02-15 09:14:22,495 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 09:14:22,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:22,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:22,497 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) [2023-02-15 09:14:22,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 09:14:39,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2023-02-15 09:14:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:39,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-15 09:14:39,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:40,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:40,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2316 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:42,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822026237] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:42,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:42,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2023-02-15 09:14:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585314706] [2023-02-15 09:14:42,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:42,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-15 09:14:42,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:42,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-15 09:14:42,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 09:14:42,119 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:42,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:42,310 INFO L93 Difference]: Finished difference Result 225 states and 276 transitions. [2023-02-15 09:14:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-02-15 09:14:42,311 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2023-02-15 09:14:42,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:42,312 INFO L225 Difference]: With dead ends: 225 [2023-02-15 09:14:42,312 INFO L226 Difference]: Without dead ends: 212 [2023-02-15 09:14:42,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2023-02-15 09:14:42,317 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:42,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 09:14:42,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-02-15 09:14:42,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2023-02-15 09:14:42,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:42,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2023-02-15 09:14:42,332 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 111 [2023-02-15 09:14:42,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:42,332 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2023-02-15 09:14:42,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.0495049504950495) internal successors, (207), 101 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:42,333 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2023-02-15 09:14:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-02-15 09:14:42,338 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:42,338 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:42,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:42,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:42,553 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:42,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1800984001, now seen corresponding path program 6 times [2023-02-15 09:14:42,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:42,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419355130] [2023-02-15 09:14:42,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:42,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:42,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-15 09:14:47,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:47,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419355130] [2023-02-15 09:14:47,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419355130] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:47,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218312788] [2023-02-15 09:14:47,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 09:14:47,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:47,122 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) [2023-02-15 09:14:47,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 09:14:47,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-15 09:14:47,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:14:47,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-15 09:14:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:47,284 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 [2023-02-15 09:14:47,605 INFO L321 Elim1Store]: treesize reduction 8, result has 84.9 percent of original size [2023-02-15 09:14:47,605 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 41 treesize of output 59 [2023-02-15 09:14:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-15 09:14:47,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:14:48,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9616 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9604 trivial. 0 not checked. [2023-02-15 09:14:48,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218312788] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:14:48,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:14:48,376 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 10, 10] total 117 [2023-02-15 09:14:48,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597817004] [2023-02-15 09:14:48,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:14:48,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2023-02-15 09:14:48,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:14:48,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2023-02-15 09:14:48,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5117, Invalid=8455, Unknown=0, NotChecked=0, Total=13572 [2023-02-15 09:14:48,380 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 117 states, 117 states have (on average 1.982905982905983) internal successors, (232), 117 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:49,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:14:49,682 INFO L93 Difference]: Finished difference Result 244 states and 250 transitions. [2023-02-15 09:14:49,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-02-15 09:14:49,683 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.982905982905983) internal successors, (232), 117 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2023-02-15 09:14:49,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:14:49,684 INFO L225 Difference]: With dead ends: 244 [2023-02-15 09:14:49,684 INFO L226 Difference]: Without dead ends: 223 [2023-02-15 09:14:49,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 532 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1716 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5239, Invalid=11017, Unknown=0, NotChecked=0, Total=16256 [2023-02-15 09:14:49,687 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 28 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 09:14:49,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 69 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 09:14:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-02-15 09:14:49,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2023-02-15 09:14:49,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:49,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2023-02-15 09:14:49,702 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 211 [2023-02-15 09:14:49,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:14:49,703 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2023-02-15 09:14:49,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.982905982905983) internal successors, (232), 117 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:14:49,703 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2023-02-15 09:14:49,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-02-15 09:14:49,704 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:14:49,704 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:14:49,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 09:14:49,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:49,910 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:14:49,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:14:49,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1557427305, now seen corresponding path program 7 times [2023-02-15 09:14:49,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:14:49,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642460721] [2023-02-15 09:14:49,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:14:49,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:14:49,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:14:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:14:53,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642460721] [2023-02-15 09:14:53,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642460721] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:14:53,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754915096] [2023-02-15 09:14:53,489 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 09:14:53,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:14:53,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:14:53,490 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) [2023-02-15 09:14:53,491 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 09:14:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:14:53,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 985 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-15 09:14:53,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:14:53,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:14:53,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:15:02,798 INFO L134 CoverageAnalysis]: Checked inductivity of 9857 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:02,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754915096] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:15:02,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:15:02,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2023-02-15 09:15:02,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457287289] [2023-02-15 09:15:02,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:15:02,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2023-02-15 09:15:02,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:15:02,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2023-02-15 09:15:02,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-15 09:15:02,806 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:15:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:15:03,477 INFO L93 Difference]: Finished difference Result 445 states and 547 transitions. [2023-02-15 09:15:03,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2023-02-15 09:15:03,478 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 221 [2023-02-15 09:15:03,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:15:03,479 INFO L225 Difference]: With dead ends: 445 [2023-02-15 09:15:03,479 INFO L226 Difference]: Without dead ends: 424 [2023-02-15 09:15:03,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2023-02-15 09:15:03,482 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 09:15:03,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 58 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 09:15:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-02-15 09:15:03,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2023-02-15 09:15:03,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.0047281323877069) internal successors, (425), 423 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:15:03,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 425 transitions. [2023-02-15 09:15:03,492 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 425 transitions. Word has length 221 [2023-02-15 09:15:03,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:15:03,492 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 425 transitions. [2023-02-15 09:15:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 2.0246305418719213) internal successors, (411), 203 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:15:03,493 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 425 transitions. [2023-02-15 09:15:03,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2023-02-15 09:15:03,496 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:15:03,496 INFO L195 NwaCegarLoop]: trace histogram [200, 200, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:15:03,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 09:15:03,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 09:15:03,703 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:15:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:15:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash -559803425, now seen corresponding path program 8 times [2023-02-15 09:15:03,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:15:03,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348391729] [2023-02-15 09:15:03,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:15:03,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:15:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:15:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:22,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:15:22,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348391729] [2023-02-15 09:15:22,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348391729] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:15:22,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736532524] [2023-02-15 09:15:22,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 09:15:22,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:15:22,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:15:22,501 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) [2023-02-15 09:15:22,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 09:15:22,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 09:15:22,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:15:22,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 1894 conjuncts, 202 conjunts are in the unsatisfiable core [2023-02-15 09:15:22,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:15:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:23,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:15:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 40056 backedges. 0 proven. 40000 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:15:56,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736532524] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:15:56,224 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:15:56,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [203, 203, 203] total 405 [2023-02-15 09:15:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767845303] [2023-02-15 09:15:56,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:15:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 405 states [2023-02-15 09:15:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:15:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 405 interpolants. [2023-02-15 09:15:56,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-15 09:15:56,249 INFO L87 Difference]: Start difference. First operand 424 states and 425 transitions. Second operand has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:16:00,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:16:00,734 INFO L93 Difference]: Finished difference Result 849 states and 1052 transitions. [2023-02-15 09:16:00,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 404 states. [2023-02-15 09:16:00,735 INFO L78 Accepts]: Start accepts. Automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 423 [2023-02-15 09:16:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:16:00,738 INFO L225 Difference]: With dead ends: 849 [2023-02-15 09:16:00,739 INFO L226 Difference]: Without dead ends: 828 [2023-02-15 09:16:00,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1047 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 403 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 44.2s TimeCoverageRelationStatistics Valid=81810, Invalid=81810, Unknown=0, NotChecked=0, Total=163620 [2023-02-15 09:16:00,747 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 09:16:00,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 810 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 09:16:00,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2023-02-15 09:16:00,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2023-02-15 09:16:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 828 states, 827 states have (on average 1.0024183796856105) internal successors, (829), 827 states have internal predecessors, (829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:16:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 829 transitions. [2023-02-15 09:16:00,765 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 829 transitions. Word has length 423 [2023-02-15 09:16:00,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:16:00,767 INFO L495 AbstractCegarLoop]: Abstraction has 828 states and 829 transitions. [2023-02-15 09:16:00,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 405 states, 405 states have (on average 2.0123456790123457) internal successors, (815), 405 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:16:00,768 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 829 transitions. [2023-02-15 09:16:00,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-02-15 09:16:00,781 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:16:00,781 INFO L195 NwaCegarLoop]: trace histogram [402, 402, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:16:00,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 09:16:00,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:16:00,990 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:16:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:16:00,990 INFO L85 PathProgramCache]: Analyzing trace with hash 455110731, now seen corresponding path program 9 times [2023-02-15 09:16:00,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:16:00,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32095482] [2023-02-15 09:16:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:16:00,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:16:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 09:17:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 161604 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-02-15 09:17:26,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 09:17:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32095482] [2023-02-15 09:17:26,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32095482] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 09:17:26,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396014712] [2023-02-15 09:17:26,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 09:17:26,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 09:17:26,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 09:17:26,490 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) [2023-02-15 09:17:26,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 09:17:26,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-02-15 09:17:26,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 09:17:26,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-15 09:17:26,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 09:17:26,922 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 [2023-02-15 09:17:30,599 INFO L321 Elim1Store]: treesize reduction 24, result has 89.3 percent of original size [2023-02-15 09:17:30,599 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 86 treesize of output 231 [2023-02-15 09:17:31,839 WARN L718 sPolynomialRelations]: Constructing 64(two to the power of 6 dual juncts. [2023-02-15 09:17:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2023-02-15 09:17:31,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 09:17:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 161660 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 161604 trivial. 0 not checked. [2023-02-15 09:17:36,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396014712] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 09:17:36,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 09:17:36,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [405, 18, 18] total 437 [2023-02-15 09:17:36,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990108474] [2023-02-15 09:17:36,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 09:17:36,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 437 states [2023-02-15 09:17:36,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 09:17:36,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 437 interpolants. [2023-02-15 09:17:36,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82046, Invalid=108486, Unknown=0, NotChecked=0, Total=190532 [2023-02-15 09:17:36,700 INFO L87 Difference]: Start difference. First operand 828 states and 829 transitions. Second operand has 437 states, 437 states have (on average 1.9588100686498855) internal successors, (856), 437 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:18:00,593 WARN L233 SmtUtils]: Spent 12.11s on a formula simplification. DAG size of input: 62 DAG size of output: 56 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 09:18:18,354 WARN L233 SmtUtils]: Spent 12.12s on a formula simplification. DAG size of input: 64 DAG size of output: 58 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 09:18:25,803 WARN L233 SmtUtils]: Spent 6.06s on a formula simplification. DAG size of input: 53 DAG size of output: 48 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-15 09:18:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 09:18:29,615 INFO L93 Difference]: Finished difference Result 884 states and 894 transitions. [2023-02-15 09:18:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 442 states. [2023-02-15 09:18:29,616 INFO L78 Accepts]: Start accepts. Automaton has has 437 states, 437 states have (on average 1.9588100686498855) internal successors, (856), 437 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 827 [2023-02-15 09:18:29,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 09:18:29,618 INFO L225 Difference]: With dead ends: 884 [2023-02-15 09:18:29,619 INFO L226 Difference]: Without dead ends: 847 [2023-02-15 09:18:29,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2084 GetRequests, 1622 SyntacticMatches, 0 SemanticMatches, 462 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13833 ImplicationChecksByTransitivity, 104.0s TimeCoverageRelationStatistics Valid=82646, Invalid=132186, Unknown=0, NotChecked=0, Total=214832 [2023-02-15 09:18:29,627 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 1149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-02-15 09:18:29,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 71 Invalid, 1149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-02-15 09:18:29,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2023-02-15 09:18:29,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 846. [2023-02-15 09:18:29,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.0023668639053254) internal successors, (847), 845 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:18:29,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 847 transitions. [2023-02-15 09:18:29,643 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 847 transitions. Word has length 827 [2023-02-15 09:18:29,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 09:18:29,644 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 847 transitions. [2023-02-15 09:18:29,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 437 states, 437 states have (on average 1.9588100686498855) internal successors, (856), 437 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 09:18:29,645 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 847 transitions. [2023-02-15 09:18:29,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 846 [2023-02-15 09:18:29,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 09:18:29,650 INFO L195 NwaCegarLoop]: trace histogram [403, 403, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 09:18:29,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 09:18:29,858 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,SelfDestructingSolverStorable11 [2023-02-15 09:18:29,859 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 09:18:29,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 09:18:29,859 INFO L85 PathProgramCache]: Analyzing trace with hash 788222689, now seen corresponding path program 10 times [2023-02-15 09:18:29,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 09:18:29,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797929905] [2023-02-15 09:18:29,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 09:18:29,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 09:18:30,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat