./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array19_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array19_pattern.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 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:58:49,316 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:58:49,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:58:49,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:58:49,345 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:58:49,346 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:58:49,347 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:58:49,348 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:58:49,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:58:49,351 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:58:49,351 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:58:49,352 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:58:49,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:58:49,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:58:49,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:58:49,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:58:49,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:58:49,357 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:58:49,359 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:58:49,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:58:49,362 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:58:49,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:58:49,363 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:58:49,365 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:58:49,365 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:58:49,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:58:49,368 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:58:49,368 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:58:49,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:58:49,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:58:49,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:58:49,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:58:49,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:58:49,372 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:58:49,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:58:49,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:58:49,374 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:58:49,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:58:49,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:58:49,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:58:49,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:58:49,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:58:49,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:58:49,411 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:58:49,411 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:58:49,412 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:58:49,412 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:58:49,412 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:58:49,413 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:58:49,413 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:58:49,413 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:58:49,414 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:58:49,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:58:49,415 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:58:49,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:58:49,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:58:49,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:58:49,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:58:49,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:58:49,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:58:49,416 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:58:49,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:58:49,417 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:58:49,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:58:49,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:58:49,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:58:49,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:58:49,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:58:49,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:58:49,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:58:49,418 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:58:49,419 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:58:49,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:58:49,419 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:58:49,419 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:58:49,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:58:49,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a [2022-07-11 22:58:49,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:58:49,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:58:49,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:58:49,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:58:49,704 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:58:49,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-11 22:58:49,776 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2f86aec/4af78fd2137f49648e1665c8b9e27cb1/FLAGec47e4b21 [2022-07-11 22:58:50,157 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:58:50,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-11 22:58:50,169 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2f86aec/4af78fd2137f49648e1665c8b9e27cb1/FLAGec47e4b21 [2022-07-11 22:58:50,180 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f2f86aec/4af78fd2137f49648e1665c8b9e27cb1 [2022-07-11 22:58:50,183 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:58:50,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:58:50,187 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:58:50,187 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:58:50,192 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:58:50,193 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,194 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ccd552 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50, skipping insertion in model container [2022-07-11 22:58:50,194 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:58:50,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:58:50,362 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-patterns/array19_pattern.c[1442,1455] [2022-07-11 22:58:50,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:58:50,407 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:58:50,420 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-patterns/array19_pattern.c[1442,1455] [2022-07-11 22:58:50,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:58:50,457 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:58:50,458 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50 WrapperNode [2022-07-11 22:58:50,458 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:58:50,459 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:58:50,459 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:58:50,459 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:58:50,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,509 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2022-07-11 22:58:50,510 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:58:50,511 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:58:50,511 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:58:50,511 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:58:50,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,522 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,523 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,538 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:58:50,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:58:50,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:58:50,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:58:50,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (1/1) ... [2022-07-11 22:58:50,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:58:50,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:58:50,580 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 22:58:50,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 22:58:50,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:58:50,622 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-11 22:58:50,622 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-11 22:58:50,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:58:50,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:58:50,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:58:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:58:50,623 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:58:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:58:50,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:58:50,696 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:58:50,698 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:58:50,905 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:58:50,914 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:58:50,915 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-11 22:58:50,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:58:50 BoogieIcfgContainer [2022-07-11 22:58:50,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:58:50,919 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:58:50,919 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:58:50,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:58:50,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:58:50" (1/3) ... [2022-07-11 22:58:50,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535343ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:58:50, skipping insertion in model container [2022-07-11 22:58:50,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:50" (2/3) ... [2022-07-11 22:58:50,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535343ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:58:50, skipping insertion in model container [2022-07-11 22:58:50,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:58:50" (3/3) ... [2022-07-11 22:58:50,924 INFO L111 eAbstractionObserver]: Analyzing ICFG array19_pattern.c [2022-07-11 22:58:50,936 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:58:50,937 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:58:50,985 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:58:51,000 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@7c9b9508, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@314d0ea8 [2022-07-11 22:58:51,001 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:58:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:58:51,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-11 22:58:51,011 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:58:51,011 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:58:51,012 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:58:51,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:58:51,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2022-07-11 22:58:51,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:58:51,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920112291] [2022-07-11 22:58:51,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:51,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:58:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:58:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-11 22:58:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:58:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:58:51,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:58:51,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920112291] [2022-07-11 22:58:51,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920112291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:58:51,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:58:51,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:58:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159781741] [2022-07-11 22:58:51,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:58:51,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:58:51,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:58:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:58:51,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:58:51,168 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 22:58:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:58:51,188 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2022-07-11 22:58:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:58:51,190 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-11 22:58:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:58:51,197 INFO L225 Difference]: With dead ends: 63 [2022-07-11 22:58:51,197 INFO L226 Difference]: Without dead ends: 29 [2022-07-11 22:58:51,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:58:51,205 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:58:51,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:58:51,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-11 22:58:51,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-11 22:58:51,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:58:51,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-11 22:58:51,239 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2022-07-11 22:58:51,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:58:51,240 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-11 22:58:51,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 22:58:51,241 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-11 22:58:51,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:58:51,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:58:51,243 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] [2022-07-11 22:58:51,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:58:51,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:58:51,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:58:51,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2022-07-11 22:58:51,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:58:51,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202245587] [2022-07-11 22:58:51,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:51,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:58:51,289 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:58:51,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [807914997] [2022-07-11 22:58:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:51,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:58:51,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:58:51,298 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:58:51,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:58:51,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:58:51,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-11 22:58:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:58:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:58:51,440 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:58:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:58:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202245587] [2022-07-11 22:58:51,441 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:58:51,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807914997] [2022-07-11 22:58:51,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807914997] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:58:51,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:58:51,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:58:51,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050421466] [2022-07-11 22:58:51,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:58:51,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:58:51,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:58:51,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:58:51,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:58:51,445 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:58:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:58:51,465 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-07-11 22:58:51,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:58:51,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-11 22:58:51,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:58:51,467 INFO L225 Difference]: With dead ends: 36 [2022-07-11 22:58:51,467 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 22:58:51,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:58:51,468 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:58:51,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:58:51,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 22:58:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-11 22:58:51,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:58:51,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-11 22:58:51,475 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-07-11 22:58:51,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:58:51,476 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-11 22:58:51,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:58:51,476 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-11 22:58:51,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 22:58:51,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:58:51,477 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] [2022-07-11 22:58:51,510 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:58:51,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:58:51,706 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:58:51,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:58:51,707 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2022-07-11 22:58:51,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:58:51,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573734790] [2022-07-11 22:58:51,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:51,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:58:51,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:58:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820983217] [2022-07-11 22:58:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:51,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:58:51,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:58:51,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:58:51,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:58:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:58:51,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:58:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:58:51,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-11 22:58:51,911 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:58:51,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:58:51,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573734790] [2022-07-11 22:58:51,911 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:58:51,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820983217] [2022-07-11 22:58:51,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820983217] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:58:51,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:58:51,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 22:58:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282420959] [2022-07-11 22:58:51,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:58:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 22:58:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:58:51,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 22:58:51,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:58:51,914 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:58:52,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:58:52,017 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2022-07-11 22:58:52,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-11 22:58:52,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-11 22:58:52,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:58:52,019 INFO L225 Difference]: With dead ends: 67 [2022-07-11 22:58:52,019 INFO L226 Difference]: Without dead ends: 42 [2022-07-11 22:58:52,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:58:52,020 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 22 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:58:52,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 80 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:58:52,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-11 22:58:52,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2022-07-11 22:58:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:58:52,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-07-11 22:58:52,027 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 35 [2022-07-11 22:58:52,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:58:52,027 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-07-11 22:58:52,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:58:52,028 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-07-11 22:58:52,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 22:58:52,029 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:58:52,029 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, 1, 1] [2022-07-11 22:58:52,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:58:52,247 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,SelfDestructingSolverStorable2 [2022-07-11 22:58:52,248 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:58:52,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:58:52,248 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2022-07-11 22:58:52,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:58:52,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345867618] [2022-07-11 22:58:52,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:52,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:58:52,268 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:58:52,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12278452] [2022-07-11 22:58:52,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:52,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:58:52,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:58:52,276 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:58:52,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:58:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:58:52,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:58:52,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:58:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:58:52,389 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:58:52,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:58:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345867618] [2022-07-11 22:58:52,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:58:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12278452] [2022-07-11 22:58:52,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12278452] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:58:52,390 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:58:52,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:58:52,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585650201] [2022-07-11 22:58:52,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:58:52,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:58:52,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:58:52,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:58:52,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:58:52,393 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:58:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:58:52,448 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2022-07-11 22:58:52,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:58:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-07-11 22:58:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:58:52,451 INFO L225 Difference]: With dead ends: 64 [2022-07-11 22:58:52,451 INFO L226 Difference]: Without dead ends: 36 [2022-07-11 22:58:52,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:58:52,454 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:58:52,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 51 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:58:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-11 22:58:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-07-11 22:58:52,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:58:52,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2022-07-11 22:58:52,467 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 38 [2022-07-11 22:58:52,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:58:52,467 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2022-07-11 22:58:52,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:58:52,468 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2022-07-11 22:58:52,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 22:58:52,469 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:58:52,469 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, 1, 1, 1, 1] [2022-07-11 22:58:52,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:58:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:58:52,675 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:58:52,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:58:52,676 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2022-07-11 22:58:52,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:58:52,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867930437] [2022-07-11 22:58:52,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:52,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:58:52,689 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-07-11 22:58:52,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1679348725] [2022-07-11 22:58:52,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:52,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:58:52,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:58:52,691 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-11 22:58:52,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:58:52,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:58:52,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-11 22:58:52,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:58:52,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 45 treesize of output 40 [2022-07-11 22:58:52,872 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-07-11 22:58:52,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 11 [2022-07-11 22:58:53,438 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 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 316 treesize of output 297 [2022-07-11 22:58:54,100 INFO L356 Elim1Store]: treesize reduction 428, result has 1.2 percent of original size [2022-07-11 22:58:54,101 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 8 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 308 treesize of output 2651 [2022-07-11 22:58:54,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:58:55,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,473 INFO L244 Elim1Store]: Index analysis took 406 ms [2022-07-11 22:58:55,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:58:55,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:58:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867930437] [2022-07-11 22:58:55,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-07-11 22:58:55,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679348725] [2022-07-11 22:58:55,632 WARN L319 FreeRefinementEngine]: Global settings require throwing the following exception [2022-07-11 22:58:55,658 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:58:55,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:58:55,833 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.TermVariable cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.TermVariable and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @17f9344b) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.MultiDimensionalSelect.(MultiDimensionalSelect.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.constructNestedStoreUpdateConstraintForOnePosition(ArrayIndexEqualityManager.java:415) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.constructNestedStoreUpdateConstraint(ArrayIndexEqualityManager.java:449) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.constructWriteConstraints2(Elim1Store.java:995) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1(Elim1Store.java:314) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:427) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:190) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne3(DualJunctionSaa.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne2(DualJunctionSaa.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne1(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne0(DualJunctionSaa.java:124) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:108) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:650) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:611) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:529) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:333) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:180) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:269) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:199) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:121) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:248) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:409) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:300) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:260) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:152) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-07-11 22:58:55,836 INFO L158 Benchmark]: Toolchain (without parser) took 5651.29ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 93.5MB in the beginning and 61.9MB in the end (delta: 31.6MB). Peak memory consumption was 58.0MB. Max. memory is 16.1GB. [2022-07-11 22:58:55,836 INFO L158 Benchmark]: CDTParser took 0.62ms. Allocated memory is still 83.9MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 22:58:55,836 INFO L158 Benchmark]: CACSL2BoogieTranslator took 271.80ms. Allocated memory is still 125.8MB. Free memory was 93.5MB in the beginning and 101.0MB in the end (delta: -7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-11 22:58:55,837 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.91ms. Allocated memory is still 125.8MB. Free memory was 101.0MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-11 22:58:55,837 INFO L158 Benchmark]: Boogie Preprocessor took 40.23ms. Allocated memory is still 125.8MB. Free memory was 98.9MB in the beginning and 97.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-11 22:58:55,837 INFO L158 Benchmark]: RCFGBuilder took 365.61ms. Allocated memory is still 125.8MB. Free memory was 97.5MB in the beginning and 85.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-07-11 22:58:55,838 INFO L158 Benchmark]: TraceAbstraction took 4916.67ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 84.3MB in the beginning and 61.9MB in the end (delta: 22.4MB). Peak memory consumption was 50.2MB. Max. memory is 16.1GB. [2022-07-11 22:58:55,839 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.62ms. Allocated memory is still 83.9MB. Free memory was 54.0MB in the beginning and 54.0MB in the end (delta: 27.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 271.80ms. Allocated memory is still 125.8MB. Free memory was 93.5MB in the beginning and 101.0MB in the end (delta: -7.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.91ms. Allocated memory is still 125.8MB. Free memory was 101.0MB in the beginning and 98.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.23ms. Allocated memory is still 125.8MB. Free memory was 98.9MB in the beginning and 97.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 365.61ms. Allocated memory is still 125.8MB. Free memory was 97.5MB in the beginning and 85.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 4916.67ms. Allocated memory was 125.8MB in the beginning and 151.0MB in the end (delta: 25.2MB). Free memory was 84.3MB in the beginning and 61.9MB in the end (delta: 22.4MB). Peak memory consumption was 50.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.TermVariable cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.TermVariable and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @17f9344b) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ClassCastException: class de.uni_freiburg.informatik.ultimate.logic.TermVariable cannot be cast to class de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm (de.uni_freiburg.informatik.ultimate.logic.TermVariable and de.uni_freiburg.informatik.ultimate.logic.ApplicationTerm are in unnamed module of loader org.eclipse.osgi.internal.loader.EquinoxClassLoader @17f9344b): de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.MultiDimensionalSelect.(MultiDimensionalSelect.java:103) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-07-11 22:58:55,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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-patterns/array19_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:58:57,671 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:58:57,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:58:57,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:58:57,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:58:57,711 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:58:57,715 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:58:57,718 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:58:57,720 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:58:57,735 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:58:57,737 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:58:57,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:58:57,742 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:58:57,744 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:58:57,745 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:58:57,746 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:58:57,747 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:58:57,748 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:58:57,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:58:57,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:58:57,758 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:58:57,758 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:58:57,759 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:58:57,761 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:58:57,761 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:58:57,764 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:58:57,765 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:58:57,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:58:57,766 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:58:57,767 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:58:57,767 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:58:57,768 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:58:57,769 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:58:57,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:58:57,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:58:57,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:58:57,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:58:57,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:58:57,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:58:57,773 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:58:57,774 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:58:57,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:58:57,779 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2022-07-11 22:58:57,814 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:58:57,814 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:58:57,814 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:58:57,815 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:58:57,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:58:57,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:58:57,816 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:58:57,816 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:58:57,817 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:58:57,817 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:58:57,818 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:58:57,818 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:58:57,818 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:58:57,818 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:58:57,818 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:58:57,819 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:58:57,819 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-07-11 22:58:57,819 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-07-11 22:58:57,819 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-07-11 22:58:57,819 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:58:57,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:58:57,820 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:58:57,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:58:57,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:58:57,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:58:57,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:58:57,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:58:57,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:58:57,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:58:57,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:58:57,822 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-07-11 22:58:57,822 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-07-11 22:58:57,822 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:58:57,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:58:57,823 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:58:57,823 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-07-11 22:58:57,823 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 21ab39d122ec2c6e96fa6b8c9d53d6f966068253a8a3d3ba32389613dd7dc54a [2022-07-11 22:58:58,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:58:58,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:58:58,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:58:58,141 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:58:58,142 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:58:58,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-11 22:58:58,190 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dafc9ddd/86fde35a7df941f196002bd004735368/FLAG523fc7e6c [2022-07-11 22:58:58,554 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:58:58,555 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array19_pattern.c [2022-07-11 22:58:58,560 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dafc9ddd/86fde35a7df941f196002bd004735368/FLAG523fc7e6c [2022-07-11 22:58:58,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0dafc9ddd/86fde35a7df941f196002bd004735368 [2022-07-11 22:58:58,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:58:58,588 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:58:58,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:58:58,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:58:58,592 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:58:58,593 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,594 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@543eb796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58, skipping insertion in model container [2022-07-11 22:58:58,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,600 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:58:58,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:58:58,761 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-patterns/array19_pattern.c[1442,1455] [2022-07-11 22:58:58,815 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:58:58,825 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:58:58,838 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-patterns/array19_pattern.c[1442,1455] [2022-07-11 22:58:58,861 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:58:58,872 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:58:58,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58 WrapperNode [2022-07-11 22:58:58,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:58:58,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:58:58,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:58:58,874 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:58:58,878 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,884 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,903 INFO L137 Inliner]: procedures = 18, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 98 [2022-07-11 22:58:58,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:58:58,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:58:58,904 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:58:58,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:58:58,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,938 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:58:58,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:58:58,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:58:58,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:58:58,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (1/1) ... [2022-07-11 22:58:58,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:58:58,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:58:58,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-11 22:58:58,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-11 22:58:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:58:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-07-11 22:58:58,996 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-11 22:58:58,996 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-11 22:58:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:58:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-07-11 22:58:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:58:58,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:58:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:58:58,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-07-11 22:58:59,075 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:58:59,076 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:58:59,535 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:58:59,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:58:59,540 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-11 22:58:59,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:58:59 BoogieIcfgContainer [2022-07-11 22:58:59,542 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:58:59,543 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:58:59,543 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:58:59,546 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:58:59,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:58:58" (1/3) ... [2022-07-11 22:58:59,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a5a8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:58:59, skipping insertion in model container [2022-07-11 22:58:59,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:58:58" (2/3) ... [2022-07-11 22:58:59,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22a5a8cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:58:59, skipping insertion in model container [2022-07-11 22:58:59,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:58:59" (3/3) ... [2022-07-11 22:58:59,550 INFO L111 eAbstractionObserver]: Analyzing ICFG array19_pattern.c [2022-07-11 22:58:59,562 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:58:59,562 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:58:59,603 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:58:59,608 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@2e6b47fe, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7780249c [2022-07-11 22:58:59,609 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:58:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:58:59,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-11 22:58:59,618 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:58:59,618 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:58:59,619 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:58:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:58:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2022-07-11 22:58:59,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 22:58:59,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [122846551] [2022-07-11 22:58:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:58:59,634 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 22:58:59,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 22:58:59,639 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 22:58:59,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-07-11 22:58:59,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:58:59,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 1 conjunts are in the unsatisfiable core [2022-07-11 22:58:59,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:58:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:58:59,752 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:58:59,752 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 22:58:59,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [122846551] [2022-07-11 22:58:59,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [122846551] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:58:59,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:58:59,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:58:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471175295] [2022-07-11 22:58:59,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:58:59,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:58:59,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 22:58:59,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:58:59,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:58:59,790 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 22:58:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:58:59,814 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2022-07-11 22:58:59,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:58:59,816 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-11 22:58:59,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:58:59,821 INFO L225 Difference]: With dead ends: 63 [2022-07-11 22:58:59,821 INFO L226 Difference]: Without dead ends: 29 [2022-07-11 22:58:59,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:58:59,826 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:58:59,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:58:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-11 22:58:59,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-07-11 22:58:59,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:58:59,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2022-07-11 22:58:59,855 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2022-07-11 22:58:59,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:58:59,856 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2022-07-11 22:58:59,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-11 22:58:59,856 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2022-07-11 22:58:59,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:58:59,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:58:59,858 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] [2022-07-11 22:58:59,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:59:00,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 22:59:00,068 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:59:00,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:59:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2022-07-11 22:59:00,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 22:59:00,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [680965022] [2022-07-11 22:59:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:59:00,074 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 22:59:00,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 22:59:00,076 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 22:59:00,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-07-11 22:59:00,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:59:00,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-11 22:59:00,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:59:00,276 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 22:59:00,276 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:59:00,277 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 22:59:00,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [680965022] [2022-07-11 22:59:00,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [680965022] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:59:00,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:59:00,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:59:00,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578976137] [2022-07-11 22:59:00,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:59:00,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:59:00,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 22:59:00,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:59:00,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:59:00,286 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:59:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:59:00,340 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2022-07-11 22:59:00,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:59:00,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-07-11 22:59:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:59:00,341 INFO L225 Difference]: With dead ends: 36 [2022-07-11 22:59:00,342 INFO L226 Difference]: Without dead ends: 32 [2022-07-11 22:59:00,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:59:00,343 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:59:00,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:59:00,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-11 22:59:00,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-07-11 22:59:00,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:59:00,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-07-11 22:59:00,352 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2022-07-11 22:59:00,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:59:00,354 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-07-11 22:59:00,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:59:00,354 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-07-11 22:59:00,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-11 22:59:00,356 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:59:00,356 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] [2022-07-11 22:59:00,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:59:00,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 22:59:00,567 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:59:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:59:00,568 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2022-07-11 22:59:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 22:59:00,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766751260] [2022-07-11 22:59:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:59:00,569 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 22:59:00,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 22:59:00,570 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 22:59:00,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-07-11 22:59:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:59:00,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:59:00,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:59:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:59:00,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:59:00,847 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 22:59:00,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766751260] [2022-07-11 22:59:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1766751260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:59:00,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:59:00,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 22:59:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320666397] [2022-07-11 22:59:00,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:59:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:59:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 22:59:00,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:59:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:59:00,850 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:59:00,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:59:00,858 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2022-07-11 22:59:00,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 22:59:00,859 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-07-11 22:59:00,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:59:00,860 INFO L225 Difference]: With dead ends: 61 [2022-07-11 22:59:00,860 INFO L226 Difference]: Without dead ends: 37 [2022-07-11 22:59:00,860 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:59:00,861 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 2 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:59:00,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 96 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 75 Unchecked, 0.0s Time] [2022-07-11 22:59:00,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-11 22:59:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-11 22:59:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:59:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2022-07-11 22:59:00,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 35 [2022-07-11 22:59:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:59:00,868 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2022-07-11 22:59:00,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:59:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2022-07-11 22:59:00,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-11 22:59:00,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:59:00,870 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, 1, 1] [2022-07-11 22:59:00,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:59:01,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 22:59:01,081 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:59:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:59:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2022-07-11 22:59:01,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 22:59:01,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1627386286] [2022-07-11 22:59:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:59:01,082 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 22:59:01,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 22:59:01,084 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 22:59:01,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-07-11 22:59:01,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:59:01,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-11 22:59:01,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:59:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 22:59:01,345 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 22:59:01,346 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 22:59:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1627386286] [2022-07-11 22:59:01,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1627386286] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:59:01,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:59:01,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 22:59:01,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857047587] [2022-07-11 22:59:01,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:59:01,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 22:59:01,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 22:59:01,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 22:59:01,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:59:01,348 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:59:01,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:59:01,355 INFO L93 Difference]: Finished difference Result 66 states and 83 transitions. [2022-07-11 22:59:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 22:59:01,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2022-07-11 22:59:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:59:01,357 INFO L225 Difference]: With dead ends: 66 [2022-07-11 22:59:01,357 INFO L226 Difference]: Without dead ends: 38 [2022-07-11 22:59:01,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-11 22:59:01,358 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:59:01,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 92 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 58 Unchecked, 0.0s Time] [2022-07-11 22:59:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-11 22:59:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-11 22:59:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-11 22:59:01,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2022-07-11 22:59:01,367 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 38 [2022-07-11 22:59:01,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:59:01,367 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2022-07-11 22:59:01,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 22:59:01,367 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2022-07-11 22:59:01,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-11 22:59:01,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:59:01,368 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, 1, 1, 1, 1] [2022-07-11 22:59:01,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-07-11 22:59:01,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 22:59:01,579 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:59:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:59:01,580 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2022-07-11 22:59:01,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 22:59:01,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [603227892] [2022-07-11 22:59:01,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:59:01,581 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 22:59:01,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 22:59:01,582 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 22:59:01,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-07-11 22:59:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:59:01,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 22:59:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:59:02,722 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 27 treesize of output 23 [2022-07-11 22:59:03,590 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-11 22:59:03,594 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:59:03,595 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 35 treesize of output 15 [2022-07-11 22:59:03,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:59:03,734 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:59:04,743 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 59 treesize of output 55 [2022-07-11 22:59:04,753 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 111 treesize of output 107 [2022-07-11 22:59:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-11 22:59:23,782 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 22:59:23,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [603227892] [2022-07-11 22:59:23,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [603227892] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:59:23,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 22:59:23,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2022-07-11 22:59:23,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393159890] [2022-07-11 22:59:23,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 22:59:23,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-11 22:59:23,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 22:59:23,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-11 22:59:23,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1274, Unknown=0, NotChecked=0, Total=1482 [2022-07-11 22:59:23,785 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 22:59:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:59:44,656 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-07-11 22:59:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-11 22:59:44,656 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 40 [2022-07-11 22:59:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:59:44,659 INFO L225 Difference]: With dead ends: 128 [2022-07-11 22:59:44,659 INFO L226 Difference]: Without dead ends: 100 [2022-07-11 22:59:44,660 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=394, Invalid=2258, Unknown=0, NotChecked=0, Total=2652 [2022-07-11 22:59:44,661 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 84 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 377 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-11 22:59:44,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 429 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 347 Invalid, 0 Unknown, 377 Unchecked, 6.9s Time] [2022-07-11 22:59:44,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-11 22:59:44,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 79. [2022-07-11 22:59:44,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 68 states have (on average 1.3088235294117647) internal successors, (89), 68 states have internal predecessors, (89), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 22:59:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 103 transitions. [2022-07-11 22:59:44,678 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 103 transitions. Word has length 40 [2022-07-11 22:59:44,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:59:44,678 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 103 transitions. [2022-07-11 22:59:44,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 35 states have (on average 1.8) internal successors, (63), 35 states have internal predecessors, (63), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-11 22:59:44,679 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 103 transitions. [2022-07-11 22:59:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 22:59:44,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:59:44,680 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:59:44,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:59:44,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 22:59:44,896 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:59:44,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:59:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1706965193, now seen corresponding path program 2 times [2022-07-11 22:59:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 22:59:44,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129890013] [2022-07-11 22:59:44,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:59:44,897 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 22:59:44,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 22:59:44,898 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 22:59:44,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-07-11 22:59:45,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:59:45,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:59:45,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-11 22:59:45,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:00:10,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:00:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 23:00:10,380 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:00:10,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129890013] [2022-07-11 23:00:10,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129890013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:00:10,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:00:10,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2022-07-11 23:00:10,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694345521] [2022-07-11 23:00:10,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:00:10,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 23:00:10,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:00:10,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 23:00:10,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=359, Unknown=6, NotChecked=0, Total=462 [2022-07-11 23:00:10,383 INFO L87 Difference]: Start difference. First operand 79 states and 103 transitions. Second operand has 22 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:00:10,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:00:10,633 INFO L93 Difference]: Finished difference Result 126 states and 168 transitions. [2022-07-11 23:00:10,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 23:00:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-07-11 23:00:10,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:00:10,641 INFO L225 Difference]: With dead ends: 126 [2022-07-11 23:00:10,641 INFO L226 Difference]: Without dead ends: 122 [2022-07-11 23:00:10,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=103, Invalid=397, Unknown=6, NotChecked=0, Total=506 [2022-07-11 23:00:10,642 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:00:10,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 137 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 63 Unchecked, 0.0s Time] [2022-07-11 23:00:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-07-11 23:00:10,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2022-07-11 23:00:10,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 85 states have (on average 1.3294117647058823) internal successors, (113), 85 states have internal predecessors, (113), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:00:10,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 131 transitions. [2022-07-11 23:00:10,659 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 131 transitions. Word has length 42 [2022-07-11 23:00:10,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:00:10,659 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 131 transitions. [2022-07-11 23:00:10,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.95) internal successors, (59), 20 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:00:10,659 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 131 transitions. [2022-07-11 23:00:10,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:00:10,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:00:10,665 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:00:10,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2022-07-11 23:00:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:00:10,867 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:00:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:00:10,868 INFO L85 PathProgramCache]: Analyzing trace with hash 460196979, now seen corresponding path program 3 times [2022-07-11 23:00:10,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:00:10,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1220930101] [2022-07-11 23:00:10,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:00:10,868 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:00:10,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:00:10,869 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:00:10,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-07-11 23:00:11,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:00:11,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:00:11,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-11 23:00:11,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:11,634 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 32 treesize of output 28 [2022-07-11 23:00:13,538 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 23:00:13,539 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 45 treesize of output 45 [2022-07-11 23:00:16,003 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:00:16,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:00:17,569 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 59 treesize of output 55 [2022-07-11 23:00:17,574 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 111 treesize of output 107 [2022-07-11 23:00:29,141 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-11 23:00:29,141 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:00:29,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1220930101] [2022-07-11 23:00:29,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1220930101] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:00:29,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:00:29,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-07-11 23:00:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366190829] [2022-07-11 23:00:29,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:00:29,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-11 23:00:29,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:00:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-11 23:00:29,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-07-11 23:00:29,144 INFO L87 Difference]: Start difference. First operand 99 states and 131 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:00:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:00:29,483 INFO L93 Difference]: Finished difference Result 154 states and 200 transitions. [2022-07-11 23:00:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-11 23:00:29,488 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2022-07-11 23:00:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:00:29,489 INFO L225 Difference]: With dead ends: 154 [2022-07-11 23:00:29,489 INFO L226 Difference]: Without dead ends: 150 [2022-07-11 23:00:29,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-07-11 23:00:29,490 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:00:29,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 189 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-07-11 23:00:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-11 23:00:29,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 91. [2022-07-11 23:00:29,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 77 states have internal predecessors, (101), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:00:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 119 transitions. [2022-07-11 23:00:29,509 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 119 transitions. Word has length 42 [2022-07-11 23:00:29,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:00:29,509 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 119 transitions. [2022-07-11 23:00:29,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:00:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 119 transitions. [2022-07-11 23:00:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:00:29,511 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:00:29,511 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:00:29,522 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-07-11 23:00:29,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:00:29,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:00:29,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:00:29,723 INFO L85 PathProgramCache]: Analyzing trace with hash -126609035, now seen corresponding path program 1 times [2022-07-11 23:00:29,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:00:29,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [846095183] [2022-07-11 23:00:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:00:29,723 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:00:29,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:00:29,724 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:00:29,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-07-11 23:00:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:00:29,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:00:29,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:00:29,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:00:29,828 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:00:29,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [846095183] [2022-07-11 23:00:29,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [846095183] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:00:29,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:00:29,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:00:29,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900448205] [2022-07-11 23:00:29,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:00:29,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:00:29,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:00:29,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:00:29,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:00:29,830 INFO L87 Difference]: Start difference. First operand 91 states and 119 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:00:32,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-11 23:00:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:00:32,215 INFO L93 Difference]: Finished difference Result 156 states and 203 transitions. [2022-07-11 23:00:32,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:00:32,217 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-11 23:00:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:00:32,218 INFO L225 Difference]: With dead ends: 156 [2022-07-11 23:00:32,218 INFO L226 Difference]: Without dead ends: 124 [2022-07-11 23:00:32,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:00:32,219 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-11 23:00:32,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 1 Unknown, 0 Unchecked, 2.4s Time] [2022-07-11 23:00:32,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-07-11 23:00:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2022-07-11 23:00:32,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 81 states have internal predecessors, (105), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:00:32,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 123 transitions. [2022-07-11 23:00:32,239 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 123 transitions. Word has length 42 [2022-07-11 23:00:32,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:00:32,241 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 123 transitions. [2022-07-11 23:00:32,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:00:32,241 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 123 transitions. [2022-07-11 23:00:32,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:00:32,246 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:00:32,246 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:00:32,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-07-11 23:00:32,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:00:32,457 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:00:32,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:00:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash -819666699, now seen corresponding path program 1 times [2022-07-11 23:00:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:00:32,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080610475] [2022-07-11 23:00:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:00:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:00:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:00:32,459 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:00:32,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-07-11 23:00:32,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:00:32,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-11 23:00:32,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:32,595 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:00:32,596 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:00:32,596 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:00:32,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080610475] [2022-07-11 23:00:32,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080610475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:00:32,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:00:32,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 23:00:32,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187714572] [2022-07-11 23:00:32,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:00:32,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 23:00:32,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:00:32,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 23:00:32,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:00:32,597 INFO L87 Difference]: Start difference. First operand 95 states and 123 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:00:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:00:32,905 INFO L93 Difference]: Finished difference Result 157 states and 202 transitions. [2022-07-11 23:00:32,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 23:00:32,907 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 42 [2022-07-11 23:00:32,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:00:32,907 INFO L225 Difference]: With dead ends: 157 [2022-07-11 23:00:32,907 INFO L226 Difference]: Without dead ends: 118 [2022-07-11 23:00:32,908 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 23:00:32,908 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 23:00:32,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 58 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-11 23:00:32,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-11 23:00:32,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 84. [2022-07-11 23:00:32,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 72 states have (on average 1.25) internal successors, (90), 72 states have internal predecessors, (90), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:00:32,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 104 transitions. [2022-07-11 23:00:32,936 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 104 transitions. Word has length 42 [2022-07-11 23:00:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:00:32,936 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 104 transitions. [2022-07-11 23:00:32,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-11 23:00:32,937 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 104 transitions. [2022-07-11 23:00:32,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-11 23:00:32,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:00:32,938 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:00:32,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-07-11 23:00:33,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:00:33,149 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:00:33,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:00:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1406472713, now seen corresponding path program 1 times [2022-07-11 23:00:33,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:00:33,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518920760] [2022-07-11 23:00:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 23:00:33,150 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:00:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:00:33,151 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:00:33,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-07-11 23:00:33,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:00:33,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:00:33,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-11 23:00:33,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:00:34,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 23:00:34,308 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:00:34,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518920760] [2022-07-11 23:00:34,308 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518920760] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:00:34,308 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:00:34,308 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-07-11 23:00:34,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149647368] [2022-07-11 23:00:34,308 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:00:34,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 23:00:34,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:00:34,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 23:00:34,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:00:34,310 INFO L87 Difference]: Start difference. First operand 84 states and 104 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 23:00:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:00:35,814 INFO L93 Difference]: Finished difference Result 152 states and 193 transitions. [2022-07-11 23:00:35,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 23:00:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 42 [2022-07-11 23:00:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:00:35,821 INFO L225 Difference]: With dead ends: 152 [2022-07-11 23:00:35,821 INFO L226 Difference]: Without dead ends: 103 [2022-07-11 23:00:35,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2022-07-11 23:00:35,822 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 10 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:00:35,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 173 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 155 Invalid, 0 Unknown, 161 Unchecked, 0.9s Time] [2022-07-11 23:00:35,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-07-11 23:00:35,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 94. [2022-07-11 23:00:35,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 82 states have (on average 1.2682926829268293) internal successors, (104), 82 states have internal predecessors, (104), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:00:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 118 transitions. [2022-07-11 23:00:35,837 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 118 transitions. Word has length 42 [2022-07-11 23:00:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:00:35,838 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 118 transitions. [2022-07-11 23:00:35,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 23:00:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 118 transitions. [2022-07-11 23:00:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:00:35,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:00:35,839 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:00:35,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-07-11 23:00:36,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:00:36,044 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:00:36,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:00:36,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1439159703, now seen corresponding path program 4 times [2022-07-11 23:00:36,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:00:36,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [845687220] [2022-07-11 23:00:36,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:00:36,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:00:36,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:00:36,046 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:00:36,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-07-11 23:00:36,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:00:36,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:00:36,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 23:00:36,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-11 23:00:36,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:00:36,965 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:00:36,966 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:00:36,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [845687220] [2022-07-11 23:00:36,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [845687220] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:00:36,966 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:00:36,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2022-07-11 23:00:36,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792000243] [2022-07-11 23:00:36,966 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:00:36,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 23:00:36,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:00:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 23:00:36,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:00:36,967 INFO L87 Difference]: Start difference. First operand 94 states and 118 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:00:37,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:00:37,577 INFO L93 Difference]: Finished difference Result 132 states and 167 transitions. [2022-07-11 23:00:37,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-11 23:00:37,578 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 43 [2022-07-11 23:00:37,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:00:37,579 INFO L225 Difference]: With dead ends: 132 [2022-07-11 23:00:37,579 INFO L226 Difference]: Without dead ends: 121 [2022-07-11 23:00:37,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:00:37,580 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 179 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:00:37,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 106 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 79 Invalid, 0 Unknown, 160 Unchecked, 0.5s Time] [2022-07-11 23:00:37,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-07-11 23:00:37,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 88. [2022-07-11 23:00:37,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 76 states have (on average 1.236842105263158) internal successors, (94), 76 states have internal predecessors, (94), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:00:37,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-07-11 23:00:37,600 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 43 [2022-07-11 23:00:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:00:37,600 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-07-11 23:00:37,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:00:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-07-11 23:00:37,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-11 23:00:37,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:00:37,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:00:37,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2022-07-11 23:00:37,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:00:37,808 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:00:37,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:00:37,808 INFO L85 PathProgramCache]: Analyzing trace with hash -449271315, now seen corresponding path program 2 times [2022-07-11 23:00:37,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:00:37,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [712770876] [2022-07-11 23:00:37,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:00:37,809 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:00:37,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:00:37,810 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:00:37,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-07-11 23:00:37,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:00:37,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:00:37,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-11 23:00:37,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-11 23:00:38,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-11 23:00:38,075 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:00:38,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [712770876] [2022-07-11 23:00:38,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [712770876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 23:00:38,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 23:00:38,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-11 23:00:38,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309050435] [2022-07-11 23:00:38,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 23:00:38,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-11 23:00:38,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:00:38,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-11 23:00:38,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:00:38,077 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:00:38,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:00:38,090 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2022-07-11 23:00:38,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-11 23:00:38,090 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2022-07-11 23:00:38,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:00:38,091 INFO L225 Difference]: With dead ends: 140 [2022-07-11 23:00:38,091 INFO L226 Difference]: Without dead ends: 89 [2022-07-11 23:00:38,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-11 23:00:38,092 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 4 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 23:00:38,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 55 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 28 Unchecked, 0.0s Time] [2022-07-11 23:00:38,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-07-11 23:00:38,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-07-11 23:00:38,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 77 states have (on average 1.2207792207792207) internal successors, (94), 77 states have internal predecessors, (94), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-11 23:00:38,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2022-07-11 23:00:38,108 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 43 [2022-07-11 23:00:38,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:00:38,109 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2022-07-11 23:00:38,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-07-11 23:00:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2022-07-11 23:00:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-11 23:00:38,109 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:00:38,109 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:00:38,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2022-07-11 23:00:38,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:00:38,320 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:00:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:00:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 822903975, now seen corresponding path program 5 times [2022-07-11 23:00:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:00:38,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [524950841] [2022-07-11 23:00:38,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:00:38,321 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:00:38,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:00:38,322 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:00:38,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-07-11 23:00:38,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 23:00:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:00:38,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-11 23:00:38,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:00:48,957 WARN L233 SmtUtils]: Spent 8.07s on a formula simplification. DAG size of input: 27 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:01:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 23:01:02,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:03,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-11 23:01:03,168 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:01:03,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [524950841] [2022-07-11 23:01:03,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [524950841] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:01:03,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:01:03,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 8] total 23 [2022-07-11 23:01:03,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936070294] [2022-07-11 23:01:03,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:01:03,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 23:01:03,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:01:03,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 23:01:03,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=403, Unknown=5, NotChecked=0, Total=506 [2022-07-11 23:01:03,170 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:01:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:01:03,723 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2022-07-11 23:01:03,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-11 23:01:03,724 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 45 [2022-07-11 23:01:03,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:01:03,725 INFO L225 Difference]: With dead ends: 138 [2022-07-11 23:01:03,725 INFO L226 Difference]: Without dead ends: 126 [2022-07-11 23:01:03,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=112, Invalid=483, Unknown=5, NotChecked=0, Total=600 [2022-07-11 23:01:03,726 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:01:03,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 211 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-07-11 23:01:03,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-11 23:01:03,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2022-07-11 23:01:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 99 states have (on average 1.1919191919191918) internal successors, (118), 99 states have internal predecessors, (118), 9 states have call successors, (9), 8 states have call predecessors, (9), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-11 23:01:03,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 136 transitions. [2022-07-11 23:01:03,745 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 136 transitions. Word has length 45 [2022-07-11 23:01:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:01:03,745 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 136 transitions. [2022-07-11 23:01:03,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:01:03,746 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 136 transitions. [2022-07-11 23:01:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 23:01:03,746 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:01:03,746 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:01:03,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-07-11 23:01:03,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:01:03,947 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:01:03,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:01:03,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1412646757, now seen corresponding path program 6 times [2022-07-11 23:01:03,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:01:03,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562770385] [2022-07-11 23:01:03,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 23:01:03,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:01:03,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:01:03,949 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:01:03,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-07-11 23:01:04,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-11 23:01:04,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:01:04,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:01:04,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:01:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-11 23:01:04,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:05,115 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-11 23:01:05,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:01:05,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562770385] [2022-07-11 23:01:05,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562770385] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:01:05,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:01:05,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 19 [2022-07-11 23:01:05,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420415197] [2022-07-11 23:01:05,116 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:01:05,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-11 23:01:05,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:01:05,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-11 23:01:05,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-07-11 23:01:05,117 INFO L87 Difference]: Start difference. First operand 117 states and 136 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:01:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:01:05,912 INFO L93 Difference]: Finished difference Result 191 states and 222 transitions. [2022-07-11 23:01:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 23:01:05,916 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 47 [2022-07-11 23:01:05,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:01:05,918 INFO L225 Difference]: With dead ends: 191 [2022-07-11 23:01:05,918 INFO L226 Difference]: Without dead ends: 157 [2022-07-11 23:01:05,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2022-07-11 23:01:05,919 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 54 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-11 23:01:05,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 178 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 118 Invalid, 0 Unknown, 71 Unchecked, 0.5s Time] [2022-07-11 23:01:05,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-07-11 23:01:05,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 151. [2022-07-11 23:01:05,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 129 states have (on average 1.193798449612403) internal successors, (154), 129 states have internal predecessors, (154), 11 states have call successors, (11), 10 states have call predecessors, (11), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-11 23:01:05,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 176 transitions. [2022-07-11 23:01:05,951 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 176 transitions. Word has length 47 [2022-07-11 23:01:05,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:01:05,951 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 176 transitions. [2022-07-11 23:01:05,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:01:05,951 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 176 transitions. [2022-07-11 23:01:05,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 23:01:05,951 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:01:05,952 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:01:05,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-07-11 23:01:06,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:01:06,156 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:01:06,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:01:06,156 INFO L85 PathProgramCache]: Analyzing trace with hash -2057551895, now seen corresponding path program 3 times [2022-07-11 23:01:06,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:01:06,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1413520097] [2022-07-11 23:01:06,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:01:06,157 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:01:06,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:01:06,158 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:01:06,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-07-11 23:01:06,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:01:06,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:01:06,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:01:06,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:01:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:01:13,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:14,118 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:01:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1413520097] [2022-07-11 23:01:14,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1413520097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 23:01:14,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [486847113] [2022-07-11 23:01:14,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:01:14,118 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2022-07-11 23:01:14,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2022-07-11 23:01:14,120 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2022-07-11 23:01:14,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2022-07-11 23:01:14,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-11 23:01:14,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:01:14,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-11 23:01:14,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:01:30,822 WARN L233 SmtUtils]: Spent 8.08s on a formula simplification. DAG size of input: 27 DAG size of output: 21 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:01:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:01:31,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:32,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-11 23:01:32,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [486847113] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:01:32,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 23:01:32,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 10] total 25 [2022-07-11 23:01:32,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777224977] [2022-07-11 23:01:32,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 23:01:32,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-11 23:01:32,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:01:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-11 23:01:32,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=512, Unknown=3, NotChecked=0, Total=650 [2022-07-11 23:01:32,269 INFO L87 Difference]: Start difference. First operand 151 states and 176 transitions. Second operand has 25 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 23:01:37,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:01:37,500 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2022-07-11 23:01:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 23:01:37,502 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) Word has length 47 [2022-07-11 23:01:37,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:01:37,503 INFO L225 Difference]: With dead ends: 207 [2022-07-11 23:01:37,503 INFO L226 Difference]: Without dead ends: 199 [2022-07-11 23:01:37,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 125 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 28.6s TimeCoverageRelationStatistics Valid=208, Invalid=781, Unknown=3, NotChecked=0, Total=992 [2022-07-11 23:01:37,504 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 62 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:01:37,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 271 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 106 Invalid, 0 Unknown, 279 Unchecked, 0.6s Time] [2022-07-11 23:01:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-07-11 23:01:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 169. [2022-07-11 23:01:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 143 states have (on average 1.1958041958041958) internal successors, (171), 143 states have internal predecessors, (171), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-11 23:01:37,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 197 transitions. [2022-07-11 23:01:37,534 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 197 transitions. Word has length 47 [2022-07-11 23:01:37,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:01:37,534 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 197 transitions. [2022-07-11 23:01:37,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 7 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (8), 8 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-11 23:01:37,535 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 197 transitions. [2022-07-11 23:01:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-11 23:01:37,535 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:01:37,536 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:01:37,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2022-07-11 23:01:37,749 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-07-11 23:01:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:01:37,948 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:01:37,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:01:37,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2007296949, now seen corresponding path program 7 times [2022-07-11 23:01:37,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:01:37,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [81246474] [2022-07-11 23:01:37,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 23:01:37,948 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:01:37,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:01:37,949 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:01:37,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-07-11 23:01:38,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 23:01:38,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 23:01:38,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:01:38,402 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-11 23:01:38,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-11 23:01:38,646 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:01:38,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [81246474] [2022-07-11 23:01:38,647 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [81246474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:01:38,647 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:01:38,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2022-07-11 23:01:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753382767] [2022-07-11 23:01:38,647 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:01:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-11 23:01:38,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:01:38,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-11 23:01:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-07-11 23:01:38,648 INFO L87 Difference]: Start difference. First operand 169 states and 197 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 23:01:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:01:39,372 INFO L93 Difference]: Finished difference Result 319 states and 371 transitions. [2022-07-11 23:01:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-11 23:01:39,373 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2022-07-11 23:01:39,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:01:39,374 INFO L225 Difference]: With dead ends: 319 [2022-07-11 23:01:39,374 INFO L226 Difference]: Without dead ends: 168 [2022-07-11 23:01:39,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2022-07-11 23:01:39,375 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 23:01:39,375 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 57 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 103 Invalid, 0 Unknown, 42 Unchecked, 0.6s Time] [2022-07-11 23:01:39,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-11 23:01:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-07-11 23:01:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 138 states have internal predecessors, (164), 13 states have call successors, (13), 12 states have call predecessors, (13), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-11 23:01:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 190 transitions. [2022-07-11 23:01:39,405 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 190 transitions. Word has length 54 [2022-07-11 23:01:39,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:01:39,406 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 190 transitions. [2022-07-11 23:01:39,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 15 states have internal predecessors, (47), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 23:01:39,407 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 190 transitions. [2022-07-11 23:01:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-07-11 23:01:39,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:01:39,408 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:01:39,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-07-11 23:01:39,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:01:39,620 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:01:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:01:39,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2102203757, now seen corresponding path program 4 times [2022-07-11 23:01:39,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:01:39,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1474464350] [2022-07-11 23:01:39,621 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 23:01:39,621 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:01:39,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:01:39,622 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:01:39,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-07-11 23:01:39,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 23:01:39,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:01:39,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-11 23:01:39,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:01:40,121 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-11 23:01:40,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-11 23:01:40,492 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:01:40,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1474464350] [2022-07-11 23:01:40,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1474464350] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:01:40,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:01:40,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2022-07-11 23:01:40,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993658591] [2022-07-11 23:01:40,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:01:40,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 23:01:40,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:01:40,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 23:01:40,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2022-07-11 23:01:40,494 INFO L87 Difference]: Start difference. First operand 164 states and 190 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 23:01:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:01:42,122 INFO L93 Difference]: Finished difference Result 423 states and 506 transitions. [2022-07-11 23:01:42,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-11 23:01:42,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 54 [2022-07-11 23:01:42,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:01:42,129 INFO L225 Difference]: With dead ends: 423 [2022-07-11 23:01:42,129 INFO L226 Difference]: Without dead ends: 279 [2022-07-11 23:01:42,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2022-07-11 23:01:42,130 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-11 23:01:42,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 196 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 163 Invalid, 0 Unknown, 102 Unchecked, 1.1s Time] [2022-07-11 23:01:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-07-11 23:01:42,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 246. [2022-07-11 23:01:42,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 210 states have (on average 1.2190476190476192) internal successors, (256), 211 states have internal predecessors, (256), 22 states have call successors, (22), 13 states have call predecessors, (22), 13 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2022-07-11 23:01:42,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 300 transitions. [2022-07-11 23:01:42,175 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 300 transitions. Word has length 54 [2022-07-11 23:01:42,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:01:42,176 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 300 transitions. [2022-07-11 23:01:42,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-07-11 23:01:42,176 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 300 transitions. [2022-07-11 23:01:42,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:01:42,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:01:42,177 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:01:42,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-07-11 23:01:42,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:01:42,391 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:01:42,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:01:42,391 INFO L85 PathProgramCache]: Analyzing trace with hash -413774097, now seen corresponding path program 8 times [2022-07-11 23:01:42,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:01:42,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [978814974] [2022-07-11 23:01:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 23:01:42,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:01:42,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:01:42,393 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:01:42,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-07-11 23:01:42,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 23:01:42,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:01:42,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 23:01:42,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:01:43,237 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 48 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-11 23:01:43,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 10 proven. 33 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-11 23:01:43,826 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:01:43,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [978814974] [2022-07-11 23:01:43,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [978814974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:01:43,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:01:43,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 24 [2022-07-11 23:01:43,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905373741] [2022-07-11 23:01:43,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:01:43,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:01:43,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:01:43,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:01:43,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:01:43,828 INFO L87 Difference]: Start difference. First operand 246 states and 300 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:01:44,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:01:44,468 INFO L93 Difference]: Finished difference Result 411 states and 509 transitions. [2022-07-11 23:01:44,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-11 23:01:44,469 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 57 [2022-07-11 23:01:44,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:01:44,470 INFO L225 Difference]: With dead ends: 411 [2022-07-11 23:01:44,470 INFO L226 Difference]: Without dead ends: 405 [2022-07-11 23:01:44,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=212, Invalid=780, Unknown=0, NotChecked=0, Total=992 [2022-07-11 23:01:44,471 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 72 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 23:01:44,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 238 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 63 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-07-11 23:01:44,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2022-07-11 23:01:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 348. [2022-07-11 23:01:44,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 300 states have (on average 1.2366666666666666) internal successors, (371), 301 states have internal predecessors, (371), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-11 23:01:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 431 transitions. [2022-07-11 23:01:44,547 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 431 transitions. Word has length 57 [2022-07-11 23:01:44,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:01:44,548 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 431 transitions. [2022-07-11 23:01:44,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-11 23:01:44,548 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 431 transitions. [2022-07-11 23:01:44,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-11 23:01:44,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:01:44,549 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:01:44,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2022-07-11 23:01:44,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:01:44,761 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:01:44,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:01:44,761 INFO L85 PathProgramCache]: Analyzing trace with hash -328932885, now seen corresponding path program 5 times [2022-07-11 23:01:44,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:01:44,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1796182301] [2022-07-11 23:01:44,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 23:01:44,762 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:01:44,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:01:44,763 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:01:44,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-07-11 23:01:44,873 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-11 23:01:44,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:01:44,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-11 23:01:44,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:01:45,072 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-11 23:01:45,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 23:01:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-11 23:01:45,947 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-07-11 23:01:45,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1796182301] [2022-07-11 23:01:45,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1796182301] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 23:01:45,948 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-11 23:01:45,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2022-07-11 23:01:45,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200621548] [2022-07-11 23:01:45,948 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-11 23:01:45,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 23:01:45,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-07-11 23:01:45,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 23:01:45,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2022-07-11 23:01:45,950 INFO L87 Difference]: Start difference. First operand 348 states and 431 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-11 23:01:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 23:01:59,240 INFO L93 Difference]: Finished difference Result 1496 states and 1933 transitions. [2022-07-11 23:01:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-07-11 23:01:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 57 [2022-07-11 23:01:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 23:01:59,246 INFO L225 Difference]: With dead ends: 1496 [2022-07-11 23:01:59,246 INFO L226 Difference]: Without dead ends: 855 [2022-07-11 23:01:59,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3096 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1899, Invalid=7031, Unknown=0, NotChecked=0, Total=8930 [2022-07-11 23:01:59,250 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 639 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 1511 mSolverCounterSat, 590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 641 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 2101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 590 IncrementalHoareTripleChecker+Valid, 1511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-11 23:01:59,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [641 Valid, 361 Invalid, 2101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [590 Valid, 1511 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-11 23:01:59,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2022-07-11 23:01:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 425. [2022-07-11 23:01:59,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 377 states have (on average 1.2519893899204244) internal successors, (472), 378 states have internal predecessors, (472), 30 states have call successors, (30), 17 states have call predecessors, (30), 17 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-07-11 23:01:59,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 532 transitions. [2022-07-11 23:01:59,380 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 532 transitions. Word has length 57 [2022-07-11 23:01:59,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 23:01:59,380 INFO L495 AbstractCegarLoop]: Abstraction has 425 states and 532 transitions. [2022-07-11 23:01:59,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-11 23:01:59,381 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 532 transitions. [2022-07-11 23:01:59,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-07-11 23:01:59,382 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 23:01:59,382 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 23:01:59,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2022-07-11 23:01:59,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2022-07-11 23:01:59,594 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 23:01:59,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 23:01:59,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1673343477, now seen corresponding path program 9 times [2022-07-11 23:01:59,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-07-11 23:01:59,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143426405] [2022-07-11 23:01:59,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 23:01:59,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2022-07-11 23:01:59,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2022-07-11 23:01:59,596 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-07-11 23:01:59,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-07-11 23:02:00,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-11 23:02:00,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 23:02:00,136 WARN L261 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-11 23:02:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 23:02:00,351 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 21 treesize of output 17 [2022-07-11 23:02:00,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:00,679 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2022-07-11 23:02:01,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:01,237 INFO L356 Elim1Store]: treesize reduction 78, result has 17.9 percent of original size [2022-07-11 23:02:01,238 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 40 [2022-07-11 23:02:01,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:01,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:01,936 INFO L356 Elim1Store]: treesize reduction 106, result has 13.8 percent of original size [2022-07-11 23:02:01,936 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 57 [2022-07-11 23:02:16,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:16,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:16,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 23:02:17,167 INFO L356 Elim1Store]: treesize reduction 180, result has 41.0 percent of original size [2022-07-11 23:02:17,167 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 4 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 156 [2022-07-11 23:02:25,079 WARN L233 SmtUtils]: Spent 6.39s on a formula simplification. DAG size of input: 82 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 23:02:29,956 INFO L190 IndexEqualityManager]: detected not equals via solver