./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-cav19/array_min_and_copy_shift_sum_add.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 23:08:24,498 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 23:08:24,499 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 23:08:24,519 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 23:08:24,520 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 23:08:24,520 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 23:08:24,521 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 23:08:24,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 23:08:24,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 23:08:24,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 23:08:24,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 23:08:24,525 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 23:08:24,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 23:08:24,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 23:08:24,526 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 23:08:24,527 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 23:08:24,528 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 23:08:24,528 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 23:08:24,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 23:08:24,530 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 23:08:24,531 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 23:08:24,532 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 23:08:24,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 23:08:24,533 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 23:08:24,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 23:08:24,535 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 23:08:24,535 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 23:08:24,536 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 23:08:24,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 23:08:24,537 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 23:08:24,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 23:08:24,537 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 23:08:24,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 23:08:24,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 23:08:24,539 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 23:08:24,540 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 23:08:24,540 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 23:08:24,540 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 23:08:24,541 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 23:08:24,541 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 23:08:24,541 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 23:08:24,542 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 23:08:24,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 23:08:24,556 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 23:08:24,557 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 23:08:24,557 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 23:08:24,557 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 23:08:24,558 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 23:08:24,558 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 23:08:24,558 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 23:08:24,558 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 23:08:24,559 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 23:08:24,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 23:08:24,559 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 23:08:24,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 23:08:24,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 23:08:24,560 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 23:08:24,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 23:08:24,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 23:08:24,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 23:08:24,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 23:08:24,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 23:08:24,561 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 23:08:24,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 23:08:24,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 23:08:24,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 23:08:24,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 23:08:24,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:08:24,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 23:08:24,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 23:08:24,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 23:08:24,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 23:08:24,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 23:08:24,563 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 23:08:24,563 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 23:08:24,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 23:08:24,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-07-11 23:08:24,719 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 23:08:24,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 23:08:24,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 23:08:24,745 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 23:08:24,745 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 23:08:24,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-07-11 23:08:24,788 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403af4e1f/7b1576b40c1c49dd9806a873c9c00b4a/FLAGdd518ef51 [2022-07-11 23:08:25,164 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 23:08:25,165 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-07-11 23:08:25,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403af4e1f/7b1576b40c1c49dd9806a873c9c00b4a/FLAGdd518ef51 [2022-07-11 23:08:25,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/403af4e1f/7b1576b40c1c49dd9806a873c9c00b4a [2022-07-11 23:08:25,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 23:08:25,183 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 23:08:25,184 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 23:08:25,184 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 23:08:25,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 23:08:25,187 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45a6c2ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25, skipping insertion in model container [2022-07-11 23:08:25,188 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 23:08:25,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 23:08:25,309 WARN L230 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-07-11 23:08:25,322 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:08:25,326 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 23:08:25,340 WARN L230 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-cav19/array_min_and_copy_shift_sum_add.c[423,436] [2022-07-11 23:08:25,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 23:08:25,365 INFO L208 MainTranslator]: Completed translation [2022-07-11 23:08:25,365 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25 WrapperNode [2022-07-11 23:08:25,365 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 23:08:25,366 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 23:08:25,366 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 23:08:25,366 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 23:08:25,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,375 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,387 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-11 23:08:25,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 23:08:25,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 23:08:25,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 23:08:25,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 23:08:25,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,394 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,399 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,400 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 23:08:25,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 23:08:25,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 23:08:25,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 23:08:25,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (1/1) ... [2022-07-11 23:08:25,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 23:08:25,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:25,421 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) [2022-07-11 23:08:25,428 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 [2022-07-11 23:08:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 23:08:25,449 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-11 23:08:25,450 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-11 23:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 23:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 23:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 23:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 23:08:25,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 23:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 23:08:25,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 23:08:25,493 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 23:08:25,494 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 23:08:25,613 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 23:08:25,617 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 23:08:25,617 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-11 23:08:25,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:08:25 BoogieIcfgContainer [2022-07-11 23:08:25,618 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 23:08:25,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 23:08:25,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 23:08:25,621 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 23:08:25,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 11:08:25" (1/3) ... [2022-07-11 23:08:25,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4137d2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:08:25, skipping insertion in model container [2022-07-11 23:08:25,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 11:08:25" (2/3) ... [2022-07-11 23:08:25,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4137d2af and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 11:08:25, skipping insertion in model container [2022-07-11 23:08:25,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 11:08:25" (3/3) ... [2022-07-11 23:08:25,628 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-07-11 23:08:25,637 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 23:08:25,638 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 23:08:25,671 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 23:08:25,675 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1273dd26, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7d83515b [2022-07-11 23:08:25,675 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 23:08:25,678 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 23:08:25,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-11 23:08:25,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:25,683 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:25,683 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:25,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2022-07-11 23:08:25,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:25,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994010148] [2022-07-11 23:08:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:25,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:25,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:25,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:25,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:25,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:08:25,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:25,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994010148] [2022-07-11 23:08:25,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994010148] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:08:25,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:08:25,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 23:08:25,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630842664] [2022-07-11 23:08:25,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:08:25,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 23:08:25,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 23:08:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 23:08:25,861 INFO L87 Difference]: Start difference. First operand has 30 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 25 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:08:25,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:25,902 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2022-07-11 23:08:25,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 23:08:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-07-11 23:08:25,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:25,908 INFO L225 Difference]: With dead ends: 64 [2022-07-11 23:08:25,908 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 23:08:25,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:08:25,915 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 21 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:25,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 78 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 23:08:25,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 23:08:25,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-11 23:08:25,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 23:08:25,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-11 23:08:25,952 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2022-07-11 23:08:25,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:25,953 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-11 23:08:25,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-11 23:08:25,954 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-11 23:08:25,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 23:08:25,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:25,956 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:25,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 23:08:25,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:25,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2022-07-11 23:08:25,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:25,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789727025] [2022-07-11 23:08:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:25,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:26,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:08:26,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:26,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789727025] [2022-07-11 23:08:26,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789727025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:08:26,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:08:26,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 23:08:26,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554228368] [2022-07-11 23:08:26,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:08:26,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 23:08:26,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:26,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 23:08:26,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:08:26,058 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:08:26,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:26,133 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-07-11 23:08:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 23:08:26,134 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-07-11 23:08:26,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:26,135 INFO L225 Difference]: With dead ends: 50 [2022-07-11 23:08:26,135 INFO L226 Difference]: Without dead ends: 36 [2022-07-11 23:08:26,135 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 23:08:26,136 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 10 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:26,137 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:08:26,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-11 23:08:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-11 23:08:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 23:08:26,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-11 23:08:26,144 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-07-11 23:08:26,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:26,145 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-11 23:08:26,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-11 23:08:26,146 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-11 23:08:26,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 23:08:26,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:26,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:26,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 23:08:26,148 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:26,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:26,149 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2022-07-11 23:08:26,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:26,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359945097] [2022-07-11 23:08:26,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:26,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:08:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:08:26,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:26,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359945097] [2022-07-11 23:08:26,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359945097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640909470] [2022-07-11 23:08:26,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:26,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:26,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:26,372 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) [2022-07-11 23:08:26,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 23:08:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:26,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 23:08:26,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:26,649 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:08:26,704 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 23:08:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:08:26,721 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:28,871 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:08:28,871 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 18 [2022-07-11 23:08:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:08:28,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640909470] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:28,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:28,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-07-11 23:08:28,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133190258] [2022-07-11 23:08:28,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:28,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-11 23:08:28,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:28,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-11 23:08:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2022-07-11 23:08:28,909 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:08:29,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:29,084 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-11 23:08:29,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 23:08:29,085 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-07-11 23:08:29,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:29,088 INFO L225 Difference]: With dead ends: 54 [2022-07-11 23:08:29,088 INFO L226 Difference]: Without dead ends: 50 [2022-07-11 23:08:29,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2022-07-11 23:08:29,092 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 65 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:29,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 159 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 198 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-07-11 23:08:29,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-11 23:08:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-07-11 23:08:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 23:08:29,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-11 23:08:29,102 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-07-11 23:08:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:29,102 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-11 23:08:29,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 21 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:08:29,103 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-11 23:08:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 23:08:29,103 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:29,103 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:29,126 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:29,326 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:29,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2022-07-11 23:08:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:29,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945464091] [2022-07-11 23:08:29,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:29,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:29,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:29,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:29,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:29,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:08:29,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:08:29,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945464091] [2022-07-11 23:08:29,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945464091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:29,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474314111] [2022-07-11 23:08:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:29,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:29,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:29,586 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) [2022-07-11 23:08:29,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 23:08:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:29,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-11 23:08:29,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:29,727 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-11 23:08:29,768 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-11 23:08:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:08:29,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:33,895 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:08:33,896 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 17 treesize of output 18 [2022-07-11 23:08:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:08:33,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474314111] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:33,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:33,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-07-11 23:08:33,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262849013] [2022-07-11 23:08:33,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:33,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:08:33,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:33,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:08:33,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=446, Unknown=2, NotChecked=0, Total=552 [2022-07-11 23:08:33,925 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:08:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:34,109 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-07-11 23:08:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-11 23:08:34,112 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2022-07-11 23:08:34,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:34,113 INFO L225 Difference]: With dead ends: 68 [2022-07-11 23:08:34,113 INFO L226 Difference]: Without dead ends: 64 [2022-07-11 23:08:34,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=134, Invalid=566, Unknown=2, NotChecked=0, Total=702 [2022-07-11 23:08:34,114 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:34,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 266 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-07-11 23:08:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-11 23:08:34,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2022-07-11 23:08:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 39 states have internal predecessors, (50), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 23:08:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-11 23:08:34,119 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-07-11 23:08:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:34,119 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-11 23:08:34,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:08:34,120 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-11 23:08:34,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 23:08:34,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:34,121 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:34,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:34,337 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 [2022-07-11 23:08:34,337 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:34,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:34,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2022-07-11 23:08:34,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:34,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114349950] [2022-07-11 23:08:34,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:34,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:08:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:08:34,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114349950] [2022-07-11 23:08:34,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114349950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:34,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6857989] [2022-07-11 23:08:34,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:08:34,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:34,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:34,404 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) [2022-07-11 23:08:34,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 23:08:34,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:08:34,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:34,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:08:34,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:08:34,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:34,508 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:08:34,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6857989] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:34,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:34,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:08:34,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185981498] [2022-07-11 23:08:34,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:34,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:08:34,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:34,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:08:34,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:08:34,510 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-11 23:08:34,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:34,591 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2022-07-11 23:08:34,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-11 23:08:34,591 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-11 23:08:34,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:34,592 INFO L225 Difference]: With dead ends: 88 [2022-07-11 23:08:34,592 INFO L226 Difference]: Without dead ends: 69 [2022-07-11 23:08:34,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-11 23:08:34,593 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:34,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 100 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:08:34,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-11 23:08:34,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-07-11 23:08:34,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 23:08:34,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-07-11 23:08:34,598 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2022-07-11 23:08:34,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:34,598 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-07-11 23:08:34,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-11 23:08:34,599 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-07-11 23:08:34,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-11 23:08:34,600 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:34,600 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:34,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:34,815 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 [2022-07-11 23:08:34,815 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:34,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:34,816 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2022-07-11 23:08:34,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:34,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735887162] [2022-07-11 23:08:34,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:34,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:34,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:34,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:08:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:08:34,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:34,882 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:08:34,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735887162] [2022-07-11 23:08:34,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735887162] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748823696] [2022-07-11 23:08:34,882 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:08:34,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:34,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:34,884 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) [2022-07-11 23:08:34,885 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 23:08:34,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:08:34,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 23:08:34,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:08:34,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:08:35,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748823696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:08:35,000 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:08:35,000 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-11 23:08:35,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948530898] [2022-07-11 23:08:35,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:35,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-11 23:08:35,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:35,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-11 23:08:35,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-11 23:08:35,002 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-11 23:08:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:35,098 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-07-11 23:08:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-11 23:08:35,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 46 [2022-07-11 23:08:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:35,100 INFO L225 Difference]: With dead ends: 59 [2022-07-11 23:08:35,100 INFO L226 Difference]: Without dead ends: 51 [2022-07-11 23:08:35,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-11 23:08:35,101 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 46 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:35,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 119 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:08:35,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-11 23:08:35,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-07-11 23:08:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-11 23:08:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-07-11 23:08:35,119 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2022-07-11 23:08:35,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:35,119 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-11 23:08:35,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-11 23:08:35,119 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-07-11 23:08:35,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:08:35,120 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:35,120 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:35,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:35,335 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 [2022-07-11 23:08:35,336 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:35,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:35,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2022-07-11 23:08:35,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:35,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871926464] [2022-07-11 23:08:35,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:35,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:35,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:08:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:08:35,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:35,853 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:08:35,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:35,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871926464] [2022-07-11 23:08:35,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871926464] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:35,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641989704] [2022-07-11 23:08:35,853 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:08:35,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:35,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:35,868 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) [2022-07-11 23:08:35,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 23:08:35,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:08:35,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:35,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 23:08:35,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:35,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-11 23:08:36,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:36,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:36,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:08:36,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-07-11 23:08:36,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:36,326 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2022-07-11 23:08:36,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2022-07-11 23:08:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:08:36,569 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:45,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641989704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:45,069 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:08:45,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2022-07-11 23:08:45,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988432486] [2022-07-11 23:08:45,069 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:45,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-11 23:08:45,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:45,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-11 23:08:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1703, Unknown=4, NotChecked=0, Total=1892 [2022-07-11 23:08:45,071 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:08:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:46,615 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2022-07-11 23:08:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-11 23:08:46,616 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-11 23:08:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:46,616 INFO L225 Difference]: With dead ends: 95 [2022-07-11 23:08:46,616 INFO L226 Difference]: Without dead ends: 91 [2022-07-11 23:08:46,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=569, Invalid=4257, Unknown=4, NotChecked=0, Total=4830 [2022-07-11 23:08:46,618 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:46,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 359 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 790 Invalid, 0 Unknown, 203 Unchecked, 0.4s Time] [2022-07-11 23:08:46,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-11 23:08:46,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-07-11 23:08:46,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:08:46,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-11 23:08:46,625 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-07-11 23:08:46,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:46,626 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-11 23:08:46,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7058823529411764) internal successors, (58), 34 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:08:46,626 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-11 23:08:46,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:08:46,627 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:46,627 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:46,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:46,841 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 [2022-07-11 23:08:46,842 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:46,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:46,842 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2022-07-11 23:08:46,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:46,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813564381] [2022-07-11 23:08:46,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:46,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:47,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:47,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:47,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:47,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:08:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:47,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:08:47,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:47,314 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:08:47,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:47,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813564381] [2022-07-11 23:08:47,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813564381] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:47,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335888772] [2022-07-11 23:08:47,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:47,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:47,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:47,316 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) [2022-07-11 23:08:47,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 23:08:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-11 23:08:47,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:47,377 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:08:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:47,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:47,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:08:47,624 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-07-11 23:08:47,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:47,729 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-07-11 23:08:47,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-11 23:08:48,000 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:08:48,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:08:56,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335888772] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:56,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:08:56,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-07-11 23:08:56,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725139451] [2022-07-11 23:08:56,455 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:08:56,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-11 23:08:56,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:08:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-11 23:08:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1767, Unknown=4, NotChecked=0, Total=1980 [2022-07-11 23:08:56,457 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:08:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:08:57,397 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2022-07-11 23:08:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 23:08:57,398 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-11 23:08:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:08:57,399 INFO L225 Difference]: With dead ends: 93 [2022-07-11 23:08:57,399 INFO L226 Difference]: Without dead ends: 89 [2022-07-11 23:08:57,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=427, Invalid=2991, Unknown=4, NotChecked=0, Total=3422 [2022-07-11 23:08:57,400 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 67 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:08:57,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 297 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 665 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-07-11 23:08:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-11 23:08:57,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2022-07-11 23:08:57,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.25) internal successors, (75), 60 states have internal predecessors, (75), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:08:57,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-11 23:08:57,409 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-07-11 23:08:57,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:08:57,410 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-11 23:08:57,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7142857142857142) internal successors, (60), 35 states have internal predecessors, (60), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:08:57,410 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-11 23:08:57,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:08:57,414 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:08:57,414 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:08:57,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:08:57,627 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 [2022-07-11 23:08:57,627 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:08:57,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:08:57,628 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2022-07-11 23:08:57,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:08:57,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543737649] [2022-07-11 23:08:57,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:08:57,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:08:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:58,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:08:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:58,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:08:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:58,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:08:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:58,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:08:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:08:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:08:58,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:08:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543737649] [2022-07-11 23:08:58,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543737649] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:08:58,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277264192] [2022-07-11 23:08:58,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:08:58,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:08:58,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:08:58,166 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) [2022-07-11 23:08:58,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 23:08:58,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:08:58,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:08:58,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-11 23:08:58,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:08:58,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:08:58,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:58,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:58,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:08:58,489 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-07-11 23:08:58,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:08:58,579 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 39 [2022-07-11 23:08:58,780 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 18 [2022-07-11 23:08:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:08:58,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:05,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277264192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:05,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:09:05,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2022-07-11 23:09:05,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854410603] [2022-07-11 23:09:05,229 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:05,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-11 23:09:05,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:05,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-11 23:09:05,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1864, Unknown=3, NotChecked=0, Total=2070 [2022-07-11 23:09:05,231 INFO L87 Difference]: Start difference. First operand 68 states and 87 transitions. Second operand has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:09:06,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:06,558 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2022-07-11 23:09:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-11 23:09:06,559 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-11 23:09:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:06,559 INFO L225 Difference]: With dead ends: 150 [2022-07-11 23:09:06,559 INFO L226 Difference]: Without dead ends: 146 [2022-07-11 23:09:06,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=542, Invalid=3877, Unknown=3, NotChecked=0, Total=4422 [2022-07-11 23:09:06,561 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:06,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 253 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 630 Invalid, 0 Unknown, 198 Unchecked, 0.4s Time] [2022-07-11 23:09:06,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-11 23:09:06,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 72. [2022-07-11 23:09:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:09:06,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-07-11 23:09:06,569 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 50 [2022-07-11 23:09:06,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:06,569 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-07-11 23:09:06,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6111111111111112) internal successors, (58), 36 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:09:06,569 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-07-11 23:09:06,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-11 23:09:06,570 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:06,570 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:06,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:06,783 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 [2022-07-11 23:09:06,783 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:06,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:06,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2022-07-11 23:09:06,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:06,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889831659] [2022-07-11 23:09:06,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:07,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:07,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:07,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:09:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:07,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:09:07,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:07,290 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:09:07,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889831659] [2022-07-11 23:09:07,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889831659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:07,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754355738] [2022-07-11 23:09:07,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:09:07,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:07,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:07,292 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) [2022-07-11 23:09:07,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 23:09:07,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:09:07,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:07,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 23:09:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:07,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:09:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:07,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:07,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:09:07,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 43 [2022-07-11 23:09:07,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:07,740 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 44 [2022-07-11 23:09:07,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 23 [2022-07-11 23:09:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:09:07,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:23,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754355738] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:23,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:09:23,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2022-07-11 23:09:23,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910439523] [2022-07-11 23:09:23,072 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:23,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-11 23:09:23,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:23,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-11 23:09:23,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1942, Unknown=7, NotChecked=0, Total=2162 [2022-07-11 23:09:23,074 INFO L87 Difference]: Start difference. First operand 72 states and 94 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:09:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:24,080 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-07-11 23:09:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 23:09:24,081 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 50 [2022-07-11 23:09:24,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:24,081 INFO L225 Difference]: With dead ends: 116 [2022-07-11 23:09:24,081 INFO L226 Difference]: Without dead ends: 112 [2022-07-11 23:09:24,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=441, Invalid=3334, Unknown=7, NotChecked=0, Total=3782 [2022-07-11 23:09:24,083 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 58 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:24,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 346 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 664 Invalid, 0 Unknown, 180 Unchecked, 0.3s Time] [2022-07-11 23:09:24,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-11 23:09:24,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2022-07-11 23:09:24,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:09:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2022-07-11 23:09:24,093 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 50 [2022-07-11 23:09:24,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:24,093 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2022-07-11 23:09:24,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 37 states have internal predecessors, (58), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:09:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2022-07-11 23:09:24,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 23:09:24,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:24,094 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:24,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:24,299 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 [2022-07-11 23:09:24,301 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:24,302 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2022-07-11 23:09:24,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:24,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237193520] [2022-07-11 23:09:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:24,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:24,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:09:24,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:09:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-11 23:09:24,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:24,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237193520] [2022-07-11 23:09:24,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237193520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:24,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106731157] [2022-07-11 23:09:24,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:09:24,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:24,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:24,352 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) [2022-07-11 23:09:24,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 23:09:24,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-11 23:09:24,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:24,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:09:24,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:24,473 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-11 23:09:24,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-11 23:09:24,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106731157] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:24,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:24,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-11 23:09:24,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240558389] [2022-07-11 23:09:24,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:24,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:09:24,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:24,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:09:24,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:09:24,520 INFO L87 Difference]: Start difference. First operand 66 states and 85 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-11 23:09:24,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:24,625 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2022-07-11 23:09:24,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-11 23:09:24,625 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 52 [2022-07-11 23:09:24,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:24,626 INFO L225 Difference]: With dead ends: 121 [2022-07-11 23:09:24,626 INFO L226 Difference]: Without dead ends: 85 [2022-07-11 23:09:24,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-11 23:09:24,627 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 81 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:24,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 121 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:09:24,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-11 23:09:24,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2022-07-11 23:09:24,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 57 states have internal predecessors, (70), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 23:09:24,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-07-11 23:09:24,633 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 52 [2022-07-11 23:09:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:24,633 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-07-11 23:09:24,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-11 23:09:24,633 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-07-11 23:09:24,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-11 23:09:24,634 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:24,634 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:24,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:09:24,847 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 [2022-07-11 23:09:24,848 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:24,848 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2022-07-11 23:09:24,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:24,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071929676] [2022-07-11 23:09:24,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:24,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:24,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:09:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:09:24,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:09:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:24,898 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:09:24,898 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:24,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071929676] [2022-07-11 23:09:24,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071929676] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:24,898 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847397837] [2022-07-11 23:09:24,898 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:09:24,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:24,900 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) [2022-07-11 23:09:24,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 23:09:24,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:09:24,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:24,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-11 23:09:24,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:25,000 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:09:25,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-11 23:09:25,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847397837] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:09:25,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:09:25,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-11 23:09:25,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641635364] [2022-07-11 23:09:25,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:25,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 23:09:25,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:25,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 23:09:25,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-11 23:09:25,048 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-11 23:09:25,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:25,176 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-07-11 23:09:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-11 23:09:25,176 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 60 [2022-07-11 23:09:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:25,177 INFO L225 Difference]: With dead ends: 73 [2022-07-11 23:09:25,177 INFO L226 Difference]: Without dead ends: 63 [2022-07-11 23:09:25,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:09:25,178 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:25,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 132 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 23:09:25,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-11 23:09:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-07-11 23:09:25,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-07-11 23:09:25,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-11 23:09:25,182 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2022-07-11 23:09:25,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:25,182 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-11 23:09:25,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-11 23:09:25,183 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-11 23:09:25,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:09:25,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:25,183 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:25,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-11 23:09:25,387 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 [2022-07-11 23:09:25,387 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:25,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:25,388 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2022-07-11 23:09:25,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:25,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170582247] [2022-07-11 23:09:25,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:25,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:25,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:26,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:26,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:26,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:09:26,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:26,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:09:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:26,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:09:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:26,087 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:09:26,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:26,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170582247] [2022-07-11 23:09:26,087 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170582247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:26,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838365105] [2022-07-11 23:09:26,088 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:09:26,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:26,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:26,089 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:26,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 23:09:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 23:09:26,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:26,160 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:09:26,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:09:26,654 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-07-11 23:09:26,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:09:26,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,789 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2022-07-11 23:09:26,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:26,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-07-11 23:09:27,333 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2022-07-11 23:09:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:09:27,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:37,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838365105] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:37,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:09:37,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2022-07-11 23:09:37,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045215393] [2022-07-11 23:09:37,049 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:09:37,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-11 23:09:37,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:09:37,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-11 23:09:37,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3454, Unknown=3, NotChecked=0, Total=3782 [2022-07-11 23:09:37,050 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:09:38,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:09:38,663 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2022-07-11 23:09:38,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-11 23:09:38,664 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-11 23:09:38,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:09:38,665 INFO L225 Difference]: With dead ends: 111 [2022-07-11 23:09:38,665 INFO L226 Difference]: Without dead ends: 107 [2022-07-11 23:09:38,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=665, Invalid=6304, Unknown=3, NotChecked=0, Total=6972 [2022-07-11 23:09:38,667 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:09:38,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 475 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 991 Invalid, 0 Unknown, 142 Unchecked, 0.5s Time] [2022-07-11 23:09:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-11 23:09:38,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2022-07-11 23:09:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 8 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-11 23:09:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-07-11 23:09:38,676 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 64 [2022-07-11 23:09:38,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:09:38,676 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-07-11 23:09:38,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 48 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:09:38,677 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-07-11 23:09:38,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:09:38,677 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:09:38,677 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:09:38,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-07-11 23:09:38,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-11 23:09:38,891 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:09:38,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:09:38,892 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2022-07-11 23:09:38,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:09:38,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926541870] [2022-07-11 23:09:38,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:09:38,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:09:38,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:39,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:09:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:39,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:09:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:39,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:09:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:39,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:09:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:39,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:09:39,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:09:39,553 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:09:39,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:09:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926541870] [2022-07-11 23:09:39,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926541870] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:09:39,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623653773] [2022-07-11 23:09:39,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:09:39,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:09:39,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:09:39,556 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:09:39,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 23:09:39,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 23:09:39,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:09:39,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-11 23:09:39,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:09:39,633 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:09:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:09:40,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,282 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 57 [2022-07-11 23:09:40,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 63 [2022-07-11 23:09:40,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:40,584 INFO L356 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2022-07-11 23:09:40,584 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 125 treesize of output 103 [2022-07-11 23:09:41,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:41,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:09:41,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:09:41,429 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:09:41,429 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 70 [2022-07-11 23:09:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:09:41,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:09:44,225 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (not (< |ULTIMATE.start_main_~i~0#1| |c_ULTIMATE.start_main_~N~0#1|)) (forall ((v_ArrVal_258 Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int)) (let ((.cse1 (* |ULTIMATE.start_main_~i~0#1| 4))) (or (<= 0 (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse1) v_ArrVal_258))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) |v_ULTIMATE.start_main_~i~0#1_143| (select .cse0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |c_ULTIMATE.start_main_~k~0#1| 1))) (not (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse1)) (+ v_ArrVal_258 |c_ULTIMATE.start_main_~j~0#1|))) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (not (< |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~N~0#1|))))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) |c_ULTIMATE.start_main_~N~0#1|))) is different from false [2022-07-11 23:09:46,273 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_258 Int) (v_ArrVal_257 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int)) (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse1 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse3) v_ArrVal_257)) (.cse2 (* |v_ULTIMATE.start_main_~i~0#1_148| 4))) (or (<= 0 (let ((.cse0 (store .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2) v_ArrVal_258))) (+ (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) (select .cse0 |c_ULTIMATE.start_main_~#b~0#1.offset|) (select .cse0 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~k~0#1| 1))) (not (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse1) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse2)) (+ v_ArrVal_258 |c_ULTIMATE.start_main_~j~0#1|))) (not (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse3 |c_ULTIMATE.start_main_~#a~0#1.offset|)) (+ v_ArrVal_257 |c_ULTIMATE.start_main_~j~0#1|))) (not (< |v_ULTIMATE.start_main_~i~0#1_148| |c_ULTIMATE.start_main_~N~0#1|)) (< (+ |v_ULTIMATE.start_main_~i~0#1_148| 1) |c_ULTIMATE.start_main_~N~0#1|) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (not (< |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~N~0#1|)))))) is different from false [2022-07-11 23:10:50,795 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_258 Int) (v_ArrVal_257 Int) (|v_ULTIMATE.start_main_~i~0#1_148| Int) (v_ArrVal_254 Int) (|v_ULTIMATE.start_main_~i~0#1_143| Int)) (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (let ((.cse4 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base|) (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse0) v_ArrVal_254))) (let ((.cse2 (store .cse4 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse0 4) v_ArrVal_257)) (.cse3 (* |v_ULTIMATE.start_main_~i~0#1_148| 4))) (or (not (<= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#a~0#1.offset|)) (+ v_ArrVal_254 |c_ULTIMATE.start_main_~j~0#1|))) (not (< |v_ULTIMATE.start_main_~i~0#1_148| |c_ULTIMATE.start_main_~N~0#1|)) (< (+ |v_ULTIMATE.start_main_~i~0#1_148| 1) |c_ULTIMATE.start_main_~N~0#1|) (<= 0 (let ((.cse1 (store .cse2 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse3) v_ArrVal_258))) (+ (select .cse1 |c_ULTIMATE.start_main_~#b~0#1.offset|) (select .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) (select .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~k~0#1| 1))) (< (+ |v_ULTIMATE.start_main_~i~0#1_143| 1) |c_ULTIMATE.start_main_~N~0#1|) (not (< |v_ULTIMATE.start_main_~i~0#1_143| |c_ULTIMATE.start_main_~N~0#1|)) (not (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse2) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ |c_ULTIMATE.start_main_~#a~0#1.offset| .cse3)) (+ v_ArrVal_258 |c_ULTIMATE.start_main_~j~0#1|))) (not (<= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#b~0#1.base| .cse4) |c_ULTIMATE.start_main_~#a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~#a~0#1.offset| 4)) (+ v_ArrVal_257 |c_ULTIMATE.start_main_~j~0#1|)))))))) is different from false [2022-07-11 23:11:06,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623653773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:11:06,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:11:06,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30] total 53 [2022-07-11 23:11:06,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610544391] [2022-07-11 23:11:06,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:11:06,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-11 23:11:06,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:11:06,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-11 23:11:06,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=4075, Unknown=34, NotChecked=402, Total=4970 [2022-07-11 23:11:06,062 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:11:10,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:11:10,484 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-07-11 23:11:10,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-11 23:11:10,485 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-11 23:11:10,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:11:10,486 INFO L225 Difference]: With dead ends: 152 [2022-07-11 23:11:10,486 INFO L226 Difference]: Without dead ends: 148 [2022-07-11 23:11:10,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3099 ImplicationChecksByTransitivity, 89.3s TimeCoverageRelationStatistics Valid=944, Invalid=8345, Unknown=35, NotChecked=576, Total=9900 [2022-07-11 23:11:10,488 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 79 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 1598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 662 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:11:10,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 501 Invalid, 1598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 913 Invalid, 0 Unknown, 662 Unchecked, 0.5s Time] [2022-07-11 23:11:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-11 23:11:10,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 92. [2022-07-11 23:11:10,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 79 states have (on average 1.2531645569620253) internal successors, (99), 79 states have internal predecessors, (99), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:11:10,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2022-07-11 23:11:10,500 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 64 [2022-07-11 23:11:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:11:10,500 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2022-07-11 23:11:10,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.528301886792453) internal successors, (81), 53 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:11:10,500 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2022-07-11 23:11:10,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:11:10,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:11:10,501 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:11:10,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-11 23:11:10,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-11 23:11:10,719 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:11:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:11:10,719 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2022-07-11 23:11:10,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:11:10,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588746641] [2022-07-11 23:11:10,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:11:10,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:11:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:11,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:11:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:11,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:11:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:11,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:11:11,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:11,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:11:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:11,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:11:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:11:11,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:11:11,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588746641] [2022-07-11 23:11:11,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588746641] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:11:11,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426064358] [2022-07-11 23:11:11,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:11:11,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:11:11,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:11:11,454 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:11:11,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 23:11:11,510 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:11:11,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:11:11,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 23:11:11,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:11:11,530 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-11 23:11:12,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:11:12,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-07-11 23:11:12,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:11:12,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,231 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2022-07-11 23:11:12,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:12,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-07-11 23:11:12,845 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2022-07-11 23:11:12,888 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-11 23:11:12,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:11:32,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426064358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:11:32,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:11:32,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2022-07-11 23:11:32,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063406251] [2022-07-11 23:11:32,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:11:32,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-11 23:11:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:11:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-11 23:11:32,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3586, Unknown=9, NotChecked=0, Total=3906 [2022-07-11 23:11:32,025 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:11:33,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:11:33,781 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2022-07-11 23:11:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 23:11:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-11 23:11:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:11:33,783 INFO L225 Difference]: With dead ends: 127 [2022-07-11 23:11:33,783 INFO L226 Difference]: Without dead ends: 123 [2022-07-11 23:11:33,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=556, Invalid=5597, Unknown=9, NotChecked=0, Total=6162 [2022-07-11 23:11:33,784 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:11:33,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 444 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1452 Invalid, 0 Unknown, 260 Unchecked, 0.7s Time] [2022-07-11 23:11:33,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-11 23:11:33,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2022-07-11 23:11:33,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-11 23:11:33,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-07-11 23:11:33,800 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 64 [2022-07-11 23:11:33,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:11:33,801 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-07-11 23:11:33,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 9 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:11:33,801 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-07-11 23:11:33,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:11:33,802 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:11:33,802 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:11:33,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:11:34,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-11 23:11:34,004 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:11:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:11:34,005 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2022-07-11 23:11:34,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:11:34,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363021230] [2022-07-11 23:11:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:11:34,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:11:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:34,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:11:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:34,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:11:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:34,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:11:34,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:34,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:11:34,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:34,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:11:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:34,730 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:11:34,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:11:34,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363021230] [2022-07-11 23:11:34,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363021230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:11:34,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136345859] [2022-07-11 23:11:34,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:11:34,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:11:34,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:11:34,732 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:11:34,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 23:11:34,809 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 23:11:34,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:11:34,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-11 23:11:34,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:11:34,830 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2022-07-11 23:11:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:11:35,304 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 55 [2022-07-11 23:11:35,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:11:35,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,416 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 65 [2022-07-11 23:11:35,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:11:35,546 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 83 [2022-07-11 23:11:36,077 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 47 [2022-07-11 23:11:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:11:36,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:11:50,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136345859] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:11:50,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:11:50,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 47 [2022-07-11 23:11:50,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683748614] [2022-07-11 23:11:50,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:11:50,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-11 23:11:50,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:11:50,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-11 23:11:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3342, Unknown=7, NotChecked=0, Total=3660 [2022-07-11 23:11:50,878 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:11:52,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:11:52,447 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-07-11 23:11:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-11 23:11:52,448 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-11 23:11:52,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:11:52,448 INFO L225 Difference]: With dead ends: 126 [2022-07-11 23:11:52,448 INFO L226 Difference]: Without dead ends: 122 [2022-07-11 23:11:52,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=529, Invalid=5164, Unknown=7, NotChecked=0, Total=5700 [2022-07-11 23:11:52,449 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 71 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 23:11:52,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 509 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1348 Invalid, 0 Unknown, 200 Unchecked, 0.7s Time] [2022-07-11 23:11:52,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-11 23:11:52,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2022-07-11 23:11:52,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 84 states have (on average 1.2619047619047619) internal successors, (106), 84 states have internal predecessors, (106), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-11 23:11:52,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-07-11 23:11:52,462 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 64 [2022-07-11 23:11:52,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:11:52,463 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-07-11 23:11:52,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.6170212765957446) internal successors, (76), 47 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:11:52,463 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-07-11 23:11:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:11:52,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:11:52,464 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:11:52,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:11:52,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:11:52,665 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:11:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:11:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2022-07-11 23:11:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:11:52,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153680040] [2022-07-11 23:11:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:11:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:11:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:53,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:11:53,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:11:53,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:53,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:11:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:53,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:11:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:53,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:11:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:11:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:11:53,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:11:53,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153680040] [2022-07-11 23:11:53,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153680040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:11:53,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885308309] [2022-07-11 23:11:53,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:11:53,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:11:53,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:11:53,386 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:11:53,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 23:11:53,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-11 23:11:53,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:11:53,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-11 23:11:53,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:11:53,478 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:12:02,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:02,403 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-07-11 23:12:02,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 76 treesize of output 60 [2022-07-11 23:12:02,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,566 INFO L356 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-07-11 23:12:02,567 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 89 treesize of output 79 [2022-07-11 23:12:02,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:02,760 INFO L356 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-07-11 23:12:02,760 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 11 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 92 [2022-07-11 23:12:03,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,484 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:03,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:03,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:03,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:03,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:03,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:03,490 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 5 disjoint index pairs (out of 55 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 31 [2022-07-11 23:12:03,619 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:12:03,620 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:12:07,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885308309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:12:07,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:12:07,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2022-07-11 23:12:07,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460764089] [2022-07-11 23:12:07,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:12:07,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-11 23:12:07,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:12:07,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-11 23:12:07,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=5017, Unknown=6, NotChecked=0, Total=5700 [2022-07-11 23:12:07,199 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:12:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:12:15,092 INFO L93 Difference]: Finished difference Result 190 states and 245 transitions. [2022-07-11 23:12:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-11 23:12:15,092 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-11 23:12:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:12:15,093 INFO L225 Difference]: With dead ends: 190 [2022-07-11 23:12:15,093 INFO L226 Difference]: Without dead ends: 186 [2022-07-11 23:12:15,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3533 ImplicationChecksByTransitivity, 20.8s TimeCoverageRelationStatistics Valid=1137, Invalid=8953, Unknown=10, NotChecked=0, Total=10100 [2022-07-11 23:12:15,095 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 96 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:12:15,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 267 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 675 Invalid, 0 Unknown, 183 Unchecked, 0.4s Time] [2022-07-11 23:12:15,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-11 23:12:15,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2022-07-11 23:12:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 101 states have (on average 1.2871287128712872) internal successors, (130), 101 states have internal predecessors, (130), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-11 23:12:15,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2022-07-11 23:12:15,114 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 64 [2022-07-11 23:12:15,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:12:15,114 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2022-07-11 23:12:15,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 56 states have internal predecessors, (81), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:12:15,114 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2022-07-11 23:12:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:12:15,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:12:15,116 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:12:15,155 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:12:15,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-11 23:12:15,327 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:12:15,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:12:15,328 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2022-07-11 23:12:15,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:12:15,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785468220] [2022-07-11 23:12:15,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:12:15,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:12:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:15,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:12:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:15,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:12:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:15,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:12:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:15,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:12:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:16,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:12:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:16,002 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:12:16,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:12:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785468220] [2022-07-11 23:12:16,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785468220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:12:16,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453491358] [2022-07-11 23:12:16,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:12:16,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:12:16,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:12:16,004 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:12:16,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 23:12:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:16,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 23:12:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:12:16,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:12:16,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,604 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:16,605 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2022-07-11 23:12:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:16,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 65 [2022-07-11 23:12:16,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:16,875 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 73 [2022-07-11 23:12:17,352 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 37 [2022-07-11 23:12:17,396 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:12:17,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:12:38,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453491358] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:12:38,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:12:38,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2022-07-11 23:12:38,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460787168] [2022-07-11 23:12:38,255 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:12:38,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-11 23:12:38,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:12:38,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-11 23:12:38,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=3684, Unknown=10, NotChecked=0, Total=4032 [2022-07-11 23:12:38,257 INFO L87 Difference]: Start difference. First operand 118 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:12:40,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:12:40,000 INFO L93 Difference]: Finished difference Result 205 states and 257 transitions. [2022-07-11 23:12:40,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-11 23:12:40,001 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-11 23:12:40,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:12:40,002 INFO L225 Difference]: With dead ends: 205 [2022-07-11 23:12:40,002 INFO L226 Difference]: Without dead ends: 201 [2022-07-11 23:12:40,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=640, Invalid=6322, Unknown=10, NotChecked=0, Total=6972 [2022-07-11 23:12:40,003 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 1549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:12:40,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 447 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1228 Invalid, 0 Unknown, 265 Unchecked, 0.6s Time] [2022-07-11 23:12:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-11 23:12:40,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 124. [2022-07-11 23:12:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 105 states have (on average 1.2857142857142858) internal successors, (135), 106 states have internal predecessors, (135), 13 states have call successors, (13), 5 states have call predecessors, (13), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-11 23:12:40,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2022-07-11 23:12:40,021 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 64 [2022-07-11 23:12:40,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:12:40,022 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2022-07-11 23:12:40,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.58) internal successors, (79), 50 states have internal predecessors, (79), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:12:40,022 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2022-07-11 23:12:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:12:40,022 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:12:40,022 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:12:40,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 23:12:40,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-11 23:12:40,227 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:12:40,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:12:40,228 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2022-07-11 23:12:40,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:12:40,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609467934] [2022-07-11 23:12:40,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:12:40,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:12:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:40,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:12:40,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:40,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:12:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:40,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:12:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:40,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:12:40,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:40,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:12:40,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:40,932 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:12:40,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:12:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609467934] [2022-07-11 23:12:40,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609467934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:12:40,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553822208] [2022-07-11 23:12:40,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:12:40,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:12:40,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:12:40,934 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:12:40,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 23:12:40,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:12:40,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:12:40,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-11 23:12:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:12:41,017 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:12:41,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:41,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2022-07-11 23:12:41,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,643 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 75 [2022-07-11 23:12:41,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:41,790 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 63 [2022-07-11 23:12:42,219 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 27 [2022-07-11 23:12:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:12:42,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:12:53,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553822208] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:12:53,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:12:53,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 49 [2022-07-11 23:12:53,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325494778] [2022-07-11 23:12:53,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:12:53,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-11 23:12:53,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 23:12:53,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-11 23:12:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3583, Unknown=5, NotChecked=0, Total=3906 [2022-07-11 23:12:53,728 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 49 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:12:55,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:12:55,449 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-07-11 23:12:55,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 23:12:55,449 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 49 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 64 [2022-07-11 23:12:55,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:12:55,450 INFO L225 Difference]: With dead ends: 191 [2022-07-11 23:12:55,450 INFO L226 Difference]: Without dead ends: 187 [2022-07-11 23:12:55,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=559, Invalid=5442, Unknown=5, NotChecked=0, Total=6006 [2022-07-11 23:12:55,452 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 66 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1533 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 23:12:55,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 484 Invalid, 1792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1533 Invalid, 0 Unknown, 201 Unchecked, 0.8s Time] [2022-07-11 23:12:55,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-11 23:12:55,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 128. [2022-07-11 23:12:55,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 108 states have (on average 1.2962962962962963) internal successors, (140), 109 states have internal predecessors, (140), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-11 23:12:55,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-07-11 23:12:55,471 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 64 [2022-07-11 23:12:55,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:12:55,472 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-07-11 23:12:55,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.5510204081632653) internal successors, (76), 49 states have internal predecessors, (76), 9 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:12:55,472 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-07-11 23:12:55,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 23:12:55,473 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:12:55,473 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:12:55,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 23:12:55,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:12:55,673 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:12:55,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:12:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2022-07-11 23:12:55,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 23:12:55,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478172625] [2022-07-11 23:12:55,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:12:55,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 23:12:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 23:12:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-11 23:12:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-11 23:12:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-11 23:12:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:56,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-11 23:12:56,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:12:56,384 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:12:56,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 23:12:56,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478172625] [2022-07-11 23:12:56,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478172625] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:12:56,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275178373] [2022-07-11 23:12:56,385 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:12:56,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 23:12:56,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 23:12:56,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 23:12:56,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 23:12:56,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-11 23:12:56,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:12:56,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-11 23:12:56,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:12:56,477 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-11 23:12:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:57,142 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 57 [2022-07-11 23:12:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 63 [2022-07-11 23:12:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:57,440 INFO L356 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2022-07-11 23:12:57,441 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 5 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 155 treesize of output 113 [2022-07-11 23:12:58,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:58,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:12:58,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 23:12:58,517 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:12:58,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 80 [2022-07-11 23:12:58,772 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-11 23:12:58,772 INFO L328 TraceCheckSpWp]: Computing backward predicates...