./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 f4b24e32 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-?-f4b24e3 [2022-07-13 10:54:38,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:54:38,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:54:38,336 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:54:38,337 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:54:38,338 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:54:38,340 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:54:38,342 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:54:38,344 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:54:38,350 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:54:38,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:54:38,353 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:54:38,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:54:38,355 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:54:38,356 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:54:38,360 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:54:38,361 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:54:38,362 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:54:38,364 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:54:38,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:54:38,372 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:54:38,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:54:38,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:54:38,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:54:38,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:54:38,379 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:54:38,379 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:54:38,379 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:54:38,381 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:54:38,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:54:38,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:54:38,382 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:54:38,384 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:54:38,384 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:54:38,385 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:54:38,386 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:54:38,386 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:54:38,386 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:54:38,387 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:54:38,387 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:54:38,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:54:38,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:54:38,390 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:54:38,422 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:54:38,422 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:54:38,423 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:54:38,423 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:54:38,423 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:54:38,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:54:38,424 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:54:38,424 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:54:38,425 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:54:38,425 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:54:38,426 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:54:38,426 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:54:38,426 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:54:38,426 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:54:38,426 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:54:38,427 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:54:38,427 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:54:38,427 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:54:38,427 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:54:38,429 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:54:38,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:54:38,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:54:38,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:54:38,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:54:38,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:54:38,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:54:38,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:54:38,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:54:38,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:54:38,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:54:38,431 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:54:38,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:54:38,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:54:38,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8262fd4bdb4bed8fef0fbefd142e15775d81a64587fab0af0aa2004f91ae895c [2022-07-13 10:54:38,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:54:38,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:54:38,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:54:38,704 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:54:38,704 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:54:38,705 INFO L432 ainManager$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 [2022-07-13 10:54:38,755 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f25e852d/fa72f1d5472242668ff51941c781d570/FLAG4ed79f1c3 [2022-07-13 10:54:39,181 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:54:39,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_min_and_copy_shift_sum_add.c [2022-07-13 10:54:39,188 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f25e852d/fa72f1d5472242668ff51941c781d570/FLAG4ed79f1c3 [2022-07-13 10:54:39,207 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2f25e852d/fa72f1d5472242668ff51941c781d570 [2022-07-13 10:54:39,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:54:39,211 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:54:39,212 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:54:39,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:54:39,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:54:39,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54b20172 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39, skipping insertion in model container [2022-07-13 10:54:39,218 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,225 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:54:39,240 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:54:39,389 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] [2022-07-13 10:54:39,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:54:39,422 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:54:39,438 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] [2022-07-13 10:54:39,456 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:54:39,469 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:54:39,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39 WrapperNode [2022-07-13 10:54:39,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:54:39,470 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:54:39,471 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:54:39,471 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:54:39,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,485 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,507 INFO L137 Inliner]: procedures = 15, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 84 [2022-07-13 10:54:39,507 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:54:39,508 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:54:39,508 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:54:39,508 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:54:39,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,536 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,543 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,545 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:54:39,547 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:54:39,548 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:54:39,548 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:54:39,549 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (1/1) ... [2022-07-13 10:54:39,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:54:39,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:39,576 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) [2022-07-13 10:54:39,599 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 [2022-07-13 10:54:39,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:54:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-13 10:54:39,615 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-13 10:54:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:54:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 10:54:39,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:54:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:54:39,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:54:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:54:39,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 10:54:39,680 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:54:39,681 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:54:39,853 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:54:39,858 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:54:39,859 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 10:54:39,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:54:39 BoogieIcfgContainer [2022-07-13 10:54:39,860 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:54:39,862 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:54:39,862 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:54:39,881 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:54:39,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:54:39" (1/3) ... [2022-07-13 10:54:39,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd912da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:54:39, skipping insertion in model container [2022-07-13 10:54:39,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:54:39" (2/3) ... [2022-07-13 10:54:39,883 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bd912da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:54:39, skipping insertion in model container [2022-07-13 10:54:39,883 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:54:39" (3/3) ... [2022-07-13 10:54:39,884 INFO L111 eAbstractionObserver]: Analyzing ICFG array_min_and_copy_shift_sum_add.c [2022-07-13 10:54:39,896 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:54:39,903 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:54:39,963 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:54:39,970 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@56041271, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2e5c6436 [2022-07-13 10:54:39,971 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:54:39,983 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) [2022-07-13 10:54:39,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-13 10:54:39,990 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:39,991 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:54:39,992 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:39,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:39,998 INFO L85 PathProgramCache]: Analyzing trace with hash -459580484, now seen corresponding path program 1 times [2022-07-13 10:54:40,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:40,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385642175] [2022-07-13 10:54:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:40,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:40,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:40,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:40,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:40,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:40,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:54:40,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:40,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385642175] [2022-07-13 10:54:40,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385642175] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:54:40,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:54:40,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 10:54:40,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392219292] [2022-07-13 10:54:40,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:54:40,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 10:54:40,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:40,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 10:54:40,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 10:54:40,347 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) [2022-07-13 10:54:40,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:40,406 INFO L93 Difference]: Finished difference Result 64 states and 90 transitions. [2022-07-13 10:54:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:54:40,408 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 [2022-07-13 10:54:40,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:40,418 INFO L225 Difference]: With dead ends: 64 [2022-07-13 10:54:40,419 INFO L226 Difference]: Without dead ends: 27 [2022-07-13 10:54:40,422 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 [2022-07-13 10:54:40,426 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 [2022-07-13 10:54:40,427 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] [2022-07-13 10:54:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-13 10:54:40,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-13 10:54:40,465 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) [2022-07-13 10:54:40,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-07-13 10:54:40,468 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 22 [2022-07-13 10:54:40,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:40,470 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-07-13 10:54:40,470 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) [2022-07-13 10:54:40,471 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-07-13 10:54:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-13 10:54:40,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:40,475 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] [2022-07-13 10:54:40,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:54:40,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:40,477 INFO L85 PathProgramCache]: Analyzing trace with hash 778020126, now seen corresponding path program 1 times [2022-07-13 10:54:40,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:40,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183559239] [2022-07-13 10:54:40,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:40,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:40,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:40,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:40,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:40,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:40,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-13 10:54:40,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:40,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183559239] [2022-07-13 10:54:40,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183559239] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:54:40,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:54:40,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:54:40,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130545672] [2022-07-13 10:54:40,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:54:40,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:54:40,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:40,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:54:40,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:54:40,573 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) [2022-07-13 10:54:40,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:40,632 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-07-13 10:54:40,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 10:54:40,633 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 [2022-07-13 10:54:40,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:40,634 INFO L225 Difference]: With dead ends: 50 [2022-07-13 10:54:40,634 INFO L226 Difference]: Without dead ends: 36 [2022-07-13 10:54:40,635 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 [2022-07-13 10:54:40,636 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, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:40,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 69 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 10:54:40,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-13 10:54:40,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2022-07-13 10:54:40,642 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) [2022-07-13 10:54:40,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-07-13 10:54:40,643 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 24 [2022-07-13 10:54:40,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:40,644 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-07-13 10:54:40,644 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) [2022-07-13 10:54:40,644 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-07-13 10:54:40,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 10:54:40,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:40,645 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] [2022-07-13 10:54:40,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 10:54:40,646 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:40,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:40,646 INFO L85 PathProgramCache]: Analyzing trace with hash 104610043, now seen corresponding path program 1 times [2022-07-13 10:54:40,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:40,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397983083] [2022-07-13 10:54:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:41,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:41,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:54:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:54:41,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397983083] [2022-07-13 10:54:41,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397983083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:41,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067760166] [2022-07-13 10:54:41,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:41,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:41,083 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) [2022-07-13 10:54:41,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:54:41,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:41,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 10:54:41,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:41,404 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 [2022-07-13 10:54:41,458 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 [2022-07-13 10:54:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:54:41,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:43,619 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:54:43,619 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 [2022-07-13 10:54:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:54:43,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067760166] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:43,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:43,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 21 [2022-07-13 10:54:43,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151165050] [2022-07-13 10:54:43,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:43,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 10:54:43,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 10:54:43,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=330, Unknown=1, NotChecked=0, Total=420 [2022-07-13 10:54:43,679 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) [2022-07-13 10:54:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:43,878 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-07-13 10:54:43,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-13 10:54:43,879 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 [2022-07-13 10:54:43,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:43,880 INFO L225 Difference]: With dead ends: 54 [2022-07-13 10:54:43,880 INFO L226 Difference]: Without dead ends: 50 [2022-07-13 10:54:43,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=118, Invalid=433, Unknown=1, NotChecked=0, Total=552 [2022-07-13 10:54:43,882 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 [2022-07-13 10:54:43,883 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] [2022-07-13 10:54:43,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-13 10:54:43,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2022-07-13 10:54:43,889 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) [2022-07-13 10:54:43,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-13 10:54:43,891 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-07-13 10:54:43,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:43,891 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-13 10:54:43,891 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) [2022-07-13 10:54:43,892 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-13 10:54:43,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-13 10:54:43,893 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:43,893 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] [2022-07-13 10:54:43,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:44,113 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 [2022-07-13 10:54:44,113 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash -906507207, now seen corresponding path program 1 times [2022-07-13 10:54:44,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:44,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340021971] [2022-07-13 10:54:44,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:44,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:44,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:44,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:44,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:54:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:54:44,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:44,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340021971] [2022-07-13 10:54:44,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340021971] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:44,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153084057] [2022-07-13 10:54:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:44,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:44,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:44,436 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) [2022-07-13 10:54:44,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:54:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:44,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-13 10:54:44,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:44,631 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 [2022-07-13 10:54:44,681 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 [2022-07-13 10:54:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:54:44,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:46,820 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:54:46,821 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 [2022-07-13 10:54:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-13 10:54:46,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153084057] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:46,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:46,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 24 [2022-07-13 10:54:46,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170869923] [2022-07-13 10:54:46,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:46,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 10:54:46,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:46,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 10:54:46,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=447, Unknown=1, NotChecked=0, Total=552 [2022-07-13 10:54:46,871 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) [2022-07-13 10:54:47,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:47,126 INFO L93 Difference]: Finished difference Result 68 states and 87 transitions. [2022-07-13 10:54:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:54:47,127 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 [2022-07-13 10:54:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:47,129 INFO L225 Difference]: With dead ends: 68 [2022-07-13 10:54:47,129 INFO L226 Difference]: Without dead ends: 64 [2022-07-13 10:54:47,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=134, Invalid=567, Unknown=1, NotChecked=0, Total=702 [2022-07-13 10:54:47,130 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, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:47,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 208 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 266 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-07-13 10:54:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-13 10:54:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 46. [2022-07-13 10:54:47,137 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) [2022-07-13 10:54:47,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-07-13 10:54:47,138 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 36 [2022-07-13 10:54:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:47,139 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-07-13 10:54:47,139 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) [2022-07-13 10:54:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-07-13 10:54:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-13 10:54:47,140 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:47,141 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] [2022-07-13 10:54:47,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:47,355 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 [2022-07-13 10:54:47,356 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:47,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1799237277, now seen corresponding path program 2 times [2022-07-13 10:54:47,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:47,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535267433] [2022-07-13 10:54:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:47,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:47,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:47,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:54:47,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 10:54:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535267433] [2022-07-13 10:54:47,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535267433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:47,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331356629] [2022-07-13 10:54:47,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:54:47,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:47,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:47,427 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) [2022-07-13 10:54:47,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:54:47,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:54:47,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:54:47,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:54:47,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 10:54:47,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-13 10:54:47,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331356629] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:47,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:47,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-13 10:54:47,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794273483] [2022-07-13 10:54:47,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:47,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:54:47,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:54:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:54:47,586 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) [2022-07-13 10:54:47,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:47,696 INFO L93 Difference]: Finished difference Result 88 states and 109 transitions. [2022-07-13 10:54:47,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 10:54:47,697 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 [2022-07-13 10:54:47,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:47,698 INFO L225 Difference]: With dead ends: 88 [2022-07-13 10:54:47,698 INFO L226 Difference]: Without dead ends: 69 [2022-07-13 10:54:47,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:54:47,699 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 61 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-07-13 10:54:47,699 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] [2022-07-13 10:54:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-13 10:54:47,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-07-13 10:54:47,705 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) [2022-07-13 10:54:47,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-07-13 10:54:47,707 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 38 [2022-07-13 10:54:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:47,707 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-07-13 10:54:47,707 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) [2022-07-13 10:54:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-07-13 10:54:47,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-13 10:54:47,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:47,709 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] [2022-07-13 10:54:47,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:47,923 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 [2022-07-13 10:54:47,924 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:47,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:47,924 INFO L85 PathProgramCache]: Analyzing trace with hash -7684490, now seen corresponding path program 3 times [2022-07-13 10:54:47,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:47,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006711815] [2022-07-13 10:54:47,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:47,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:47,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:54:47,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:54:47,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:54:47,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:47,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006711815] [2022-07-13 10:54:47,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006711815] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:47,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584012546] [2022-07-13 10:54:47,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:54:47,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:47,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:47,988 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) [2022-07-13 10:54:48,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:54:48,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-13 10:54:48,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:54:48,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 10:54:48,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:54:48,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-13 10:54:48,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584012546] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:54:48,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:54:48,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-13 10:54:48,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478925148] [2022-07-13 10:54:48,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:48,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-13 10:54:48,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:48,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-13 10:54:48,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-13 10:54:48,146 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) [2022-07-13 10:54:48,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:48,264 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2022-07-13 10:54:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-13 10:54:48,264 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 [2022-07-13 10:54:48,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:48,266 INFO L225 Difference]: With dead ends: 59 [2022-07-13 10:54:48,273 INFO L226 Difference]: Without dead ends: 51 [2022-07-13 10:54:48,273 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 [2022-07-13 10:54:48,274 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 [2022-07-13 10:54:48,276 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] [2022-07-13 10:54:48,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-13 10:54:48,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-07-13 10:54:48,283 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) [2022-07-13 10:54:48,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2022-07-13 10:54:48,284 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 46 [2022-07-13 10:54:48,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:48,284 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2022-07-13 10:54:48,284 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) [2022-07-13 10:54:48,285 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2022-07-13 10:54:48,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:54:48,288 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:48,288 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] [2022-07-13 10:54:48,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:48,511 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 [2022-07-13 10:54:48,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:48,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1064283002, now seen corresponding path program 4 times [2022-07-13 10:54:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:48,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729214925] [2022-07-13 10:54:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:48,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:49,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:49,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:49,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:49,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:54:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:49,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:54:49,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:54:49,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:49,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729214925] [2022-07-13 10:54:49,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729214925] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:49,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174156036] [2022-07-13 10:54:49,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:54:49,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:49,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:49,168 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) [2022-07-13 10:54:49,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:54:49,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:54:49,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:54:49,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-13 10:54:49,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:49,255 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 [2022-07-13 10:54:49,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:54:49,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:54:49,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:54:49,602 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 [2022-07-13 10:54:49,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:54:49,724 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 [2022-07-13 10:54:49,990 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 [2022-07-13 10:54:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:54:50,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:54:56,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174156036] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:56,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:54:56,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 34 [2022-07-13 10:54:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494157838] [2022-07-13 10:54:56,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:54:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-13 10:54:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:54:56,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-13 10:54:56,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1704, Unknown=3, NotChecked=0, Total=1892 [2022-07-13 10:54:56,609 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) [2022-07-13 10:54:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:54:58,465 INFO L93 Difference]: Finished difference Result 95 states and 121 transitions. [2022-07-13 10:54:58,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 10:54:58,473 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 [2022-07-13 10:54:58,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:54:58,476 INFO L225 Difference]: With dead ends: 95 [2022-07-13 10:54:58,476 INFO L226 Difference]: Without dead ends: 91 [2022-07-13 10:54:58,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=569, Invalid=4258, Unknown=3, NotChecked=0, Total=4830 [2022-07-13 10:54:58,479 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 65 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:54:58,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 359 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 790 Invalid, 0 Unknown, 203 Unchecked, 0.5s Time] [2022-07-13 10:54:58,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-07-13 10:54:58,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2022-07-13 10:54:58,489 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) [2022-07-13 10:54:58,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-13 10:54:58,490 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-07-13 10:54:58,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:54:58,490 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-13 10:54:58,490 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) [2022-07-13 10:54:58,490 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-13 10:54:58,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:54:58,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:54:58,492 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] [2022-07-13 10:54:58,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:54:58,695 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 [2022-07-13 10:54:58,696 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:54:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:54:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash -929861704, now seen corresponding path program 1 times [2022-07-13 10:54:58,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:54:58,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433518901] [2022-07-13 10:54:58,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:58,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:54:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:59,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:54:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:59,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:54:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:59,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:54:59,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:59,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:54:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:59,370 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:54:59,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:54:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433518901] [2022-07-13 10:54:59,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433518901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:54:59,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612891295] [2022-07-13 10:54:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:54:59,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:54:59,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:54:59,376 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) [2022-07-13 10:54:59,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:54:59,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:54:59,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-13 10:54:59,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:54:59,465 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 [2022-07-13 10:54:59,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:54:59,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:54:59,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:54:59,764 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 [2022-07-13 10:54:59,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:54:59,884 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 [2022-07-13 10:55:00,146 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 [2022-07-13 10:55:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:55:00,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:11,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612891295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:11,404 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:55:11,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 35 [2022-07-13 10:55:11,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667822854] [2022-07-13 10:55:11,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:11,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-13 10:55:11,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:11,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-13 10:55:11,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1766, Unknown=5, NotChecked=0, Total=1980 [2022-07-13 10:55:11,407 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) [2022-07-13 10:55:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:12,499 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2022-07-13 10:55:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-13 10:55:12,500 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 [2022-07-13 10:55:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:12,501 INFO L225 Difference]: With dead ends: 93 [2022-07-13 10:55:12,501 INFO L226 Difference]: Without dead ends: 89 [2022-07-13 10:55:12,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1070 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=427, Invalid=2990, Unknown=5, NotChecked=0, Total=3422 [2022-07-13 10:55:12,503 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:55:12,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 297 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 665 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-07-13 10:55:12,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-13 10:55:12,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 68. [2022-07-13 10:55:12,513 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) [2022-07-13 10:55:12,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 87 transitions. [2022-07-13 10:55:12,514 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 87 transitions. Word has length 50 [2022-07-13 10:55:12,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:12,514 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 87 transitions. [2022-07-13 10:55:12,514 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) [2022-07-13 10:55:12,514 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 87 transitions. [2022-07-13 10:55:12,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:55:12,515 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:12,515 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] [2022-07-13 10:55:12,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:12,719 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 [2022-07-13 10:55:12,720 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:12,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:12,720 INFO L85 PathProgramCache]: Analyzing trace with hash 554809912, now seen corresponding path program 2 times [2022-07-13 10:55:12,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:12,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211900981] [2022-07-13 10:55:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:12,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:13,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:55:13,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:13,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:55:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:13,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:55:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:55:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:13,291 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:55:13,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:13,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211900981] [2022-07-13 10:55:13,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211900981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:13,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917143942] [2022-07-13 10:55:13,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:55:13,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:13,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:13,299 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) [2022-07-13 10:55:13,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:55:13,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:55:13,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:55:13,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-13 10:55:13,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:13,373 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 [2022-07-13 10:55:13,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:13,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:13,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:55:13,709 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 [2022-07-13 10:55:13,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:13,814 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 [2022-07-13 10:55:14,016 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 [2022-07-13 10:55:14,056 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:55:14,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:24,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917143942] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:24,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:55:24,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18] total 36 [2022-07-13 10:55:24,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274883230] [2022-07-13 10:55:24,577 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:24,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-13 10:55:24,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:24,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-13 10:55:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1862, Unknown=5, NotChecked=0, Total=2070 [2022-07-13 10:55:24,579 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) [2022-07-13 10:55:26,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:26,116 INFO L93 Difference]: Finished difference Result 150 states and 192 transitions. [2022-07-13 10:55:26,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-13 10:55:26,117 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 [2022-07-13 10:55:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:26,118 INFO L225 Difference]: With dead ends: 150 [2022-07-13 10:55:26,118 INFO L226 Difference]: Without dead ends: 146 [2022-07-13 10:55:26,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=542, Invalid=3875, Unknown=5, NotChecked=0, Total=4422 [2022-07-13 10:55:26,120 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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 [2022-07-13 10:55:26,120 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] [2022-07-13 10:55:26,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-07-13 10:55:26,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 72. [2022-07-13 10:55:26,131 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) [2022-07-13 10:55:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 94 transitions. [2022-07-13 10:55:26,132 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 94 transitions. Word has length 50 [2022-07-13 10:55:26,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:26,132 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 94 transitions. [2022-07-13 10:55:26,132 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) [2022-07-13 10:55:26,132 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 94 transitions. [2022-07-13 10:55:26,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-13 10:55:26,133 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:26,133 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] [2022-07-13 10:55:26,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:26,339 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 [2022-07-13 10:55:26,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:26,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:26,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1439334794, now seen corresponding path program 2 times [2022-07-13 10:55:26,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:26,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322580438] [2022-07-13 10:55:26,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:26,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:26,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:55:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:26,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:55:26,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:26,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:55:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:26,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:55:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:26,968 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:55:26,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:26,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322580438] [2022-07-13 10:55:26,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322580438] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:26,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974980768] [2022-07-13 10:55:26,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:55:26,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:26,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:26,980 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) [2022-07-13 10:55:26,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:55:27,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:55:27,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:55:27,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-13 10:55:27,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:27,066 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 [2022-07-13 10:55:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:27,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:27,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:55:27,412 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 [2022-07-13 10:55:27,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:27,508 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 [2022-07-13 10:55:27,796 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 [2022-07-13 10:55:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:55:27,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:31,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974980768] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:31,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:55:31,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 37 [2022-07-13 10:55:31,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74670670] [2022-07-13 10:55:31,285 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:31,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-13 10:55:31,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-13 10:55:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=1947, Unknown=2, NotChecked=0, Total=2162 [2022-07-13 10:55:31,287 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) [2022-07-13 10:55:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:32,462 INFO L93 Difference]: Finished difference Result 116 states and 148 transitions. [2022-07-13 10:55:32,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 10:55:32,463 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 [2022-07-13 10:55:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:32,464 INFO L225 Difference]: With dead ends: 116 [2022-07-13 10:55:32,464 INFO L226 Difference]: Without dead ends: 112 [2022-07-13 10:55:32,465 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=441, Invalid=3339, Unknown=2, NotChecked=0, Total=3782 [2022-07-13 10:55:32,466 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, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:55:32,466 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 346 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 664 Invalid, 0 Unknown, 180 Unchecked, 0.4s Time] [2022-07-13 10:55:32,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-13 10:55:32,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 66. [2022-07-13 10:55:32,476 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) [2022-07-13 10:55:32,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 85 transitions. [2022-07-13 10:55:32,476 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 85 transitions. Word has length 50 [2022-07-13 10:55:32,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:32,477 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 85 transitions. [2022-07-13 10:55:32,477 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) [2022-07-13 10:55:32,477 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 85 transitions. [2022-07-13 10:55:32,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-13 10:55:32,478 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:32,478 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] [2022-07-13 10:55:32,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:32,691 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 [2022-07-13 10:55:32,692 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:32,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:32,692 INFO L85 PathProgramCache]: Analyzing trace with hash 626982236, now seen corresponding path program 5 times [2022-07-13 10:55:32,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:32,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956286246] [2022-07-13 10:55:32,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:32,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:32,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:55:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:32,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:55:32,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:32,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:55:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:32,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:55:32,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 10:55:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956286246] [2022-07-13 10:55:32,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956286246] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:32,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719086649] [2022-07-13 10:55:32,779 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:55:32,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:32,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:32,784 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) [2022-07-13 10:55:32,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:55:32,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-13 10:55:32,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:55:32,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:55:32,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 10:55:32,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:32,978 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 10:55:32,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719086649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:55:32,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:55:32,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 10:55:32,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013090536] [2022-07-13 10:55:32,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:32,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:55:32,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:32,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:55:32,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:55:32,981 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) [2022-07-13 10:55:33,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:33,111 INFO L93 Difference]: Finished difference Result 121 states and 148 transitions. [2022-07-13 10:55:33,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-13 10:55:33,112 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 [2022-07-13 10:55:33,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:33,114 INFO L225 Difference]: With dead ends: 121 [2022-07-13 10:55:33,114 INFO L226 Difference]: Without dead ends: 85 [2022-07-13 10:55:33,115 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 [2022-07-13 10:55:33,115 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 [2022-07-13 10:55:33,116 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] [2022-07-13 10:55:33,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-07-13 10:55:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 65. [2022-07-13 10:55:33,130 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) [2022-07-13 10:55:33,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2022-07-13 10:55:33,136 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 52 [2022-07-13 10:55:33,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:33,136 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2022-07-13 10:55:33,136 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) [2022-07-13 10:55:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2022-07-13 10:55:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-07-13 10:55:33,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:33,138 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] [2022-07-13 10:55:33,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:33,355 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 [2022-07-13 10:55:33,355 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash 48070069, now seen corresponding path program 6 times [2022-07-13 10:55:33,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:33,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981783203] [2022-07-13 10:55:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:33,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:33,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:55:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:33,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:55:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:33,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:55:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:33,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:55:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:33,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:55:33,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 10:55:33,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:33,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981783203] [2022-07-13 10:55:33,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981783203] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:33,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201595086] [2022-07-13 10:55:33,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:55:33,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:33,444 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) [2022-07-13 10:55:33,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:55:33,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 10:55:33,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:55:33,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-13 10:55:33,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:33,570 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 10:55:33,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-13 10:55:33,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201595086] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:55:33,617 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:55:33,617 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-13 10:55:33,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648586421] [2022-07-13 10:55:33,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:33,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-13 10:55:33,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:33,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-13 10:55:33,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-13 10:55:33,618 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) [2022-07-13 10:55:33,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:33,752 INFO L93 Difference]: Finished difference Result 73 states and 90 transitions. [2022-07-13 10:55:33,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-13 10:55:33,753 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 [2022-07-13 10:55:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:33,753 INFO L225 Difference]: With dead ends: 73 [2022-07-13 10:55:33,753 INFO L226 Difference]: Without dead ends: 63 [2022-07-13 10:55:33,753 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 [2022-07-13 10:55:33,754 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 [2022-07-13 10:55:33,754 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] [2022-07-13 10:55:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-13 10:55:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-07-13 10:55:33,760 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) [2022-07-13 10:55:33,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2022-07-13 10:55:33,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 60 [2022-07-13 10:55:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:33,761 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2022-07-13 10:55:33,761 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) [2022-07-13 10:55:33,761 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2022-07-13 10:55:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:55:33,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:33,762 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] [2022-07-13 10:55:33,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:33,971 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 [2022-07-13 10:55:33,971 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:33,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash -505691335, now seen corresponding path program 7 times [2022-07-13 10:55:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:33,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342180622] [2022-07-13 10:55:33,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:33,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:34,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:55:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:34,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:55:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:34,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:55:34,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:34,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:55:34,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:34,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:55:34,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:55:34,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:34,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342180622] [2022-07-13 10:55:34,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342180622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:34,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512161528] [2022-07-13 10:55:34,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:55:34,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:34,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:34,725 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) [2022-07-13 10:55:34,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:55:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:34,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-13 10:55:34,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:34,809 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 [2022-07-13 10:55:35,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:55:35,397 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 [2022-07-13 10:55:35,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:55:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,551 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 [2022-07-13 10:55:35,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:35,710 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 [2022-07-13 10:55:36,190 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 [2022-07-13 10:55:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:55:36,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:46,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512161528] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:46,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:55:46,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 48 [2022-07-13 10:55:46,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403826352] [2022-07-13 10:55:46,269 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:55:46,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-13 10:55:46,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:55:46,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-13 10:55:46,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3453, Unknown=4, NotChecked=0, Total=3782 [2022-07-13 10:55:46,271 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) [2022-07-13 10:55:48,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:55:48,034 INFO L93 Difference]: Finished difference Result 111 states and 137 transitions. [2022-07-13 10:55:48,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 10:55:48,034 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 [2022-07-13 10:55:48,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:55:48,036 INFO L225 Difference]: With dead ends: 111 [2022-07-13 10:55:48,036 INFO L226 Difference]: Without dead ends: 107 [2022-07-13 10:55:48,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=665, Invalid=6303, Unknown=4, NotChecked=0, Total=6972 [2022-07-13 10:55:48,038 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 64 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s 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, 0.6s IncrementalHoareTripleChecker+Time [2022-07-13 10:55:48,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 475 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 991 Invalid, 0 Unknown, 142 Unchecked, 0.6s Time] [2022-07-13 10:55:48,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-13 10:55:48,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 82. [2022-07-13 10:55:48,048 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) [2022-07-13 10:55:48,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2022-07-13 10:55:48,048 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 64 [2022-07-13 10:55:48,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:55:48,049 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2022-07-13 10:55:48,049 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) [2022-07-13 10:55:48,049 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2022-07-13 10:55:48,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:55:48,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:55:48,050 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] [2022-07-13 10:55:48,066 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:55:48,251 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 [2022-07-13 10:55:48,251 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:55:48,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:55:48,251 INFO L85 PathProgramCache]: Analyzing trace with hash -286836617, now seen corresponding path program 3 times [2022-07-13 10:55:48,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:55:48,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665593239] [2022-07-13 10:55:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:55:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:55:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:48,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:55:48,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:48,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:55:48,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:49,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:55:49,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:49,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:55:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:49,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:55:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:55:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:55:49,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:55:49,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665593239] [2022-07-13 10:55:49,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665593239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:55:49,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864801724] [2022-07-13 10:55:49,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:55:49,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:55:49,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:55:49,010 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) [2022-07-13 10:55:49,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:55:49,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 10:55:49,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:55:49,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-13 10:55:49,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:55:49,119 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 [2022-07-13 10:55:49,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:49,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:49,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:49,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:55:49,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:49,993 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 [2022-07-13 10:55:50,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:50,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:50,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:50,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:50,170 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 [2022-07-13 10:55:50,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:50,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:50,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:50,331 INFO L356 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2022-07-13 10:55:50,332 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 [2022-07-13 10:55:51,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:51,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:55:51,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:55:51,252 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:55:51,252 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 [2022-07-13 10:55:51,968 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:55:51,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:55:54,528 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 [2022-07-13 10:55:56,589 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 [2022-07-13 10:55:58,626 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 ((.cse0 (* |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| .cse0 4) v_ArrVal_257)) (.cse2 (* |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| 4)) (+ 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|)) (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|))) (<= 0 (let ((.cse3 (store .cse1 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| .cse2) v_ArrVal_258))) (+ (select .cse3 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4))) (select .cse3 (+ |c_ULTIMATE.start_main_~#b~0#1.offset| 4)) |v_ULTIMATE.start_main_~i~0#1_143| (select .cse3 |c_ULTIMATE.start_main_~#b~0#1.offset|) |c_ULTIMATE.start_main_~k~0#1| 1))))))) is different from false [2022-07-13 10:56:00,693 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 [2022-07-13 10:56:05,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864801724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:05,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:56:05,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 30] total 53 [2022-07-13 10:56:05,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198381158] [2022-07-13 10:56:05,857 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:56:05,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-13 10:56:05,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:56:05,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-13 10:56:05,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=3976, Unknown=5, NotChecked=532, Total=4970 [2022-07-13 10:56:05,859 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) [2022-07-13 10:56:08,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:56:08,154 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2022-07-13 10:56:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-13 10:56:08,154 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 [2022-07-13 10:56:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:56:08,155 INFO L225 Difference]: With dead ends: 152 [2022-07-13 10:56:08,155 INFO L226 Difference]: Without dead ends: 148 [2022-07-13 10:56:08,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 55 SyntacticMatches, 3 SemanticMatches, 98 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 3052 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=939, Invalid=8192, Unknown=5, NotChecked=764, Total=9900 [2022-07-13 10:56:08,158 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 79 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 1576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 640 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:56:08,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 499 Invalid, 1576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 913 Invalid, 0 Unknown, 640 Unchecked, 0.5s Time] [2022-07-13 10:56:08,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-13 10:56:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 92. [2022-07-13 10:56:08,173 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) [2022-07-13 10:56:08,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2022-07-13 10:56:08,173 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 64 [2022-07-13 10:56:08,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:56:08,174 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2022-07-13 10:56:08,174 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) [2022-07-13 10:56:08,174 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2022-07-13 10:56:08,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:56:08,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:56:08,175 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] [2022-07-13 10:56:08,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:56:08,375 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 [2022-07-13 10:56:08,375 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:56:08,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:56:08,376 INFO L85 PathProgramCache]: Analyzing trace with hash -230931721, now seen corresponding path program 4 times [2022-07-13 10:56:08,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:56:08,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391429311] [2022-07-13 10:56:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:56:08,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:56:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:09,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:56:09,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:09,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:56:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:09,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:56:09,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:56:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:56:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:09,206 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:56:09,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:56:09,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391429311] [2022-07-13 10:56:09,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391429311] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:09,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100799888] [2022-07-13 10:56:09,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:56:09,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:56:09,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:56:09,220 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) [2022-07-13 10:56:09,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:56:09,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:56:09,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:56:09,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-13 10:56:09,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:56:09,307 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 [2022-07-13 10:56:09,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:09,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:09,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:09,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:09,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:09,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:09,963 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 [2022-07-13 10:56:10,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:10,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:10,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:10,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:10,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:10,123 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 [2022-07-13 10:56:10,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:10,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:10,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:10,274 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 [2022-07-13 10:56:10,762 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 [2022-07-13 10:56:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 6 proven. 45 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-13 10:56:10,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:56:20,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100799888] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:20,729 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:56:20,729 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2022-07-13 10:56:20,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254657348] [2022-07-13 10:56:20,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:56:20,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 10:56:20,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:56:20,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 10:56:20,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3591, Unknown=4, NotChecked=0, Total=3906 [2022-07-13 10:56:20,731 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) [2022-07-13 10:56:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:56:22,537 INFO L93 Difference]: Finished difference Result 127 states and 160 transitions. [2022-07-13 10:56:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 10:56:22,538 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 [2022-07-13 10:56:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:56:22,538 INFO L225 Difference]: With dead ends: 127 [2022-07-13 10:56:22,539 INFO L226 Difference]: Without dead ends: 123 [2022-07-13 10:56:22,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=556, Invalid=5602, Unknown=4, NotChecked=0, Total=6162 [2022-07-13 10:56:22,541 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 80 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s 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, 0.8s IncrementalHoareTripleChecker+Time [2022-07-13 10:56:22,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 444 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1452 Invalid, 0 Unknown, 260 Unchecked, 0.8s Time] [2022-07-13 10:56:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-07-13 10:56:22,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 98. [2022-07-13 10:56:22,553 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) [2022-07-13 10:56:22,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-07-13 10:56:22,554 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 64 [2022-07-13 10:56:22,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:56:22,554 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-07-13 10:56:22,554 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) [2022-07-13 10:56:22,554 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-07-13 10:56:22,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:56:22,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:56:22,555 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] [2022-07-13 10:56:22,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:56:22,759 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 [2022-07-13 10:56:22,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:56:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:56:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash -12077003, now seen corresponding path program 5 times [2022-07-13 10:56:22,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:56:22,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416281828] [2022-07-13 10:56:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:56:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:56:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:23,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:56:23,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:23,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:56:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:23,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:56:23,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:23,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:56:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:23,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:56:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:56:23,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:56:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416281828] [2022-07-13 10:56:23,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416281828] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:23,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347573190] [2022-07-13 10:56:23,582 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:56:23,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:56:23,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:56:23,600 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) [2022-07-13 10:56:23,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:56:23,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-13 10:56:23,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:56:23,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-13 10:56:23,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:56:23,711 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 [2022-07-13 10:56:24,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,300 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:24,301 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 [2022-07-13 10:56:24,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:24,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,455 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 [2022-07-13 10:56:24,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:24,629 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 [2022-07-13 10:56:25,202 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 [2022-07-13 10:56:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:56:25,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:56:42,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347573190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:42,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:56:42,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 24] total 47 [2022-07-13 10:56:42,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342404546] [2022-07-13 10:56:42,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:56:42,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-13 10:56:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:56:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-13 10:56:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=3341, Unknown=8, NotChecked=0, Total=3660 [2022-07-13 10:56:42,897 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) [2022-07-13 10:56:44,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:56:44,526 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-07-13 10:56:44,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-13 10:56:44,527 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 [2022-07-13 10:56:44,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:56:44,527 INFO L225 Difference]: With dead ends: 126 [2022-07-13 10:56:44,527 INFO L226 Difference]: Without dead ends: 122 [2022-07-13 10:56:44,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1872 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=529, Invalid=5163, Unknown=8, NotChecked=0, Total=5700 [2022-07-13 10:56:44,529 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 [2022-07-13 10:56:44,529 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] [2022-07-13 10:56:44,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-13 10:56:44,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 98. [2022-07-13 10:56:44,542 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) [2022-07-13 10:56:44,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2022-07-13 10:56:44,543 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 64 [2022-07-13 10:56:44,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:56:44,543 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2022-07-13 10:56:44,543 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) [2022-07-13 10:56:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2022-07-13 10:56:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:56:44,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:56:44,545 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] [2022-07-13 10:56:44,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:56:44,745 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 [2022-07-13 10:56:44,746 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:56:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:56:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash -257544841, now seen corresponding path program 6 times [2022-07-13 10:56:44,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:56:44,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534513723] [2022-07-13 10:56:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:56:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:56:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:56:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:45,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:56:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:45,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:56:45,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:45,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:56:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:45,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:56:45,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:56:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:56:45,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:56:45,558 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534513723] [2022-07-13 10:56:45,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534513723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:45,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659502769] [2022-07-13 10:56:45,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:56:45,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:56:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:56:45,564 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) [2022-07-13 10:56:45,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:56:45,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-13 10:56:45,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:56:45,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-13 10:56:45,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:56:45,659 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 [2022-07-13 10:56:53,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:53,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:53,729 INFO L356 Elim1Store]: treesize reduction 33, result has 2.9 percent of original size [2022-07-13 10:56:53,729 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 [2022-07-13 10:56:53,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:53,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:53,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:53,908 INFO L356 Elim1Store]: treesize reduction 58, result has 1.7 percent of original size [2022-07-13 10:56:53,908 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 [2022-07-13 10:56:54,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,122 INFO L356 Elim1Store]: treesize reduction 38, result has 2.6 percent of original size [2022-07-13 10:56:54,122 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 [2022-07-13 10:56:54,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,852 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:54,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:54,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:54,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:56:54,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:54,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:56:54,863 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 [2022-07-13 10:56:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:56:55,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:56:56,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659502769] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:56:56,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:56:56,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 32] total 56 [2022-07-13 10:56:56,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692085047] [2022-07-13 10:56:56,636 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:56:56,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-13 10:56:56,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:56:56,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-13 10:56:56,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=5018, Unknown=5, NotChecked=0, Total=5700 [2022-07-13 10:56:56,638 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) [2022-07-13 10:57:04,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:04,424 INFO L93 Difference]: Finished difference Result 190 states and 245 transitions. [2022-07-13 10:57:04,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-13 10:57:04,424 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 [2022-07-13 10:57:04,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:04,425 INFO L225 Difference]: With dead ends: 190 [2022-07-13 10:57:04,425 INFO L226 Difference]: Without dead ends: 186 [2022-07-13 10:57:04,426 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3532 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=1137, Invalid=8954, Unknown=9, NotChecked=0, Total=10100 [2022-07-13 10:57:04,427 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 [2022-07-13 10:57:04,427 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] [2022-07-13 10:57:04,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-13 10:57:04,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 118. [2022-07-13 10:57:04,451 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) [2022-07-13 10:57:04,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 154 transitions. [2022-07-13 10:57:04,451 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 154 transitions. Word has length 64 [2022-07-13 10:57:04,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:04,451 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 154 transitions. [2022-07-13 10:57:04,452 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) [2022-07-13 10:57:04,452 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 154 transitions. [2022-07-13 10:57:04,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:57:04,452 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:04,452 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] [2022-07-13 10:57:04,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-13 10:57:04,659 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 [2022-07-13 10:57:04,660 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:04,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:04,660 INFO L85 PathProgramCache]: Analyzing trace with hash -38690123, now seen corresponding path program 7 times [2022-07-13 10:57:04,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:04,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079686598] [2022-07-13 10:57:04,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:04,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:57:05,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:57:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:57:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:57:05,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:57:05,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:57:05,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:05,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079686598] [2022-07-13 10:57:05,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079686598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:05,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135793766] [2022-07-13 10:57:05,469 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:57:05,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:05,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:05,480 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) [2022-07-13 10:57:05,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 10:57:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:05,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-13 10:57:05,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:57:05,582 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 [2022-07-13 10:57:06,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:57:06,168 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 [2022-07-13 10:57:06,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:57:06,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,305 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 [2022-07-13 10:57:06,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:06,438 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 [2022-07-13 10:57:06,940 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 [2022-07-13 10:57:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-13 10:57:06,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:57:16,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135793766] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:16,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:57:16,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 50 [2022-07-13 10:57:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551930953] [2022-07-13 10:57:16,155 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:57:16,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-13 10:57:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:57:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-13 10:57:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=3690, Unknown=4, NotChecked=0, Total=4032 [2022-07-13 10:57:16,156 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) [2022-07-13 10:57:18,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:18,005 INFO L93 Difference]: Finished difference Result 205 states and 257 transitions. [2022-07-13 10:57:18,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-13 10:57:18,006 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 [2022-07-13 10:57:18,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:18,007 INFO L225 Difference]: With dead ends: 205 [2022-07-13 10:57:18,007 INFO L226 Difference]: Without dead ends: 201 [2022-07-13 10:57:18,008 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2335 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=640, Invalid=6328, Unknown=4, NotChecked=0, Total=6972 [2022-07-13 10:57:18,009 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 66 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s 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, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:57:18,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 447 Invalid, 1549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1228 Invalid, 0 Unknown, 265 Unchecked, 0.7s Time] [2022-07-13 10:57:18,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-13 10:57:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 124. [2022-07-13 10:57:18,044 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) [2022-07-13 10:57:18,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2022-07-13 10:57:18,045 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 64 [2022-07-13 10:57:18,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:18,045 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2022-07-13 10:57:18,046 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) [2022-07-13 10:57:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2022-07-13 10:57:18,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:57:18,047 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:18,047 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] [2022-07-13 10:57:18,064 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 10:57:18,247 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 [2022-07-13 10:57:18,248 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:18,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash 17214773, now seen corresponding path program 8 times [2022-07-13 10:57:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:18,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295400370] [2022-07-13 10:57:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:18,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:19,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:57:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:19,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:57:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:57:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:19,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:57:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:57:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:57:19,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295400370] [2022-07-13 10:57:19,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295400370] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:19,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951895913] [2022-07-13 10:57:19,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:57:19,028 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:19,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:19,036 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) [2022-07-13 10:57:19,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 10:57:19,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:57:19,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:57:19,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-13 10:57:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:57:19,137 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 [2022-07-13 10:57:19,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:57:19,709 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 [2022-07-13 10:57:19,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:57:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,838 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 [2022-07-13 10:57:19,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:19,985 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 [2022-07-13 10:57:20,430 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 [2022-07-13 10:57:20,476 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:57:20,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:57:37,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951895913] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:37,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:57:37,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 49 [2022-07-13 10:57:37,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097850873] [2022-07-13 10:57:37,470 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:57:37,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-13 10:57:37,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:57:37,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-13 10:57:37,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=3581, Unknown=7, NotChecked=0, Total=3906 [2022-07-13 10:57:37,471 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) [2022-07-13 10:57:39,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:57:39,199 INFO L93 Difference]: Finished difference Result 191 states and 249 transitions. [2022-07-13 10:57:39,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-13 10:57:39,200 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 [2022-07-13 10:57:39,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:57:39,201 INFO L225 Difference]: With dead ends: 191 [2022-07-13 10:57:39,201 INFO L226 Difference]: Without dead ends: 187 [2022-07-13 10:57:39,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=559, Invalid=5440, Unknown=7, NotChecked=0, Total=6006 [2022-07-13 10:57:39,202 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 [2022-07-13 10:57:39,202 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] [2022-07-13 10:57:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-07-13 10:57:39,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 128. [2022-07-13 10:57:39,228 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) [2022-07-13 10:57:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 168 transitions. [2022-07-13 10:57:39,228 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 168 transitions. Word has length 64 [2022-07-13 10:57:39,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:57:39,229 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 168 transitions. [2022-07-13 10:57:39,229 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) [2022-07-13 10:57:39,229 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 168 transitions. [2022-07-13 10:57:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-13 10:57:39,230 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:57:39,230 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] [2022-07-13 10:57:39,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 10:57:39,430 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 [2022-07-13 10:57:39,430 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:57:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:57:39,431 INFO L85 PathProgramCache]: Analyzing trace with hash 236069491, now seen corresponding path program 3 times [2022-07-13 10:57:39,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:57:39,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176640630] [2022-07-13 10:57:39,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:57:39,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:57:39,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:40,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-13 10:57:40,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:40,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-13 10:57:40,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:40,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-13 10:57:40,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:40,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-13 10:57:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:40,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-07-13 10:57:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:57:40,138 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:57:40,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:57:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176640630] [2022-07-13 10:57:40,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176640630] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:57:40,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21878062] [2022-07-13 10:57:40,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:57:40,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:57:40,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:57:40,144 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) [2022-07-13 10:57:40,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 10:57:40,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-13 10:57:40,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:57:40,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-13 10:57:40,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:57:40,240 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 [2022-07-13 10:57:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:40,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:40,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:40,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:40,901 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:57:40,902 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 [2022-07-13 10:57:41,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:41,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:41,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:41,056 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 [2022-07-13 10:57:41,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:41,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:41,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:41,194 INFO L356 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2022-07-13 10:57:41,195 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 [2022-07-13 10:57:42,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:42,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:57:42,126 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-13 10:57:42,141 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 10:57:42,142 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 [2022-07-13 10:57:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-13 10:57:42,865 INFO L328 TraceCheckSpWp]: Computing backward predicates...