./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum10.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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/reducercommutativity/rangesum10.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c00c1225dae238bedea18c737f72ae44fea020a .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 16:15:58,424 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 16:15:58,425 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 16:15:58,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 16:15:58,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 16:15:58,454 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 16:15:58,456 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 16:15:58,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 16:15:58,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 16:15:58,465 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 16:15:58,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 16:15:58,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 16:15:58,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 16:15:58,471 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 16:15:58,472 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 16:15:58,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 16:15:58,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 16:15:58,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 16:15:58,477 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 16:15:58,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 16:15:58,482 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 16:15:58,483 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 16:15:58,485 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 16:15:58,485 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 16:15:58,490 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 16:15:58,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 16:15:58,490 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 16:15:58,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 16:15:58,492 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 16:15:58,492 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 16:15:58,492 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 16:15:58,493 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 16:15:58,494 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 16:15:58,496 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 16:15:58,496 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 16:15:58,497 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 16:15:58,497 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 16:15:58,497 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 16:15:58,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 16:15:58,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 16:15:58,499 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 16:15:58,502 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 16:15:58,529 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 16:15:58,529 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 16:15:58,530 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 16:15:58,530 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 16:15:58,531 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 16:15:58,532 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 16:15:58,532 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 16:15:58,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 16:15:58,532 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 16:15:58,532 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 16:15:58,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 16:15:58,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 16:15:58,533 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 16:15:58,533 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 16:15:58,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 16:15:58,534 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 16:15:58,534 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 16:15:58,534 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 16:15:58,534 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 16:15:58,534 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 16:15:58,534 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 16:15:58,535 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 16:15:58,535 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:15:58,535 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 16:15:58,535 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 16:15:58,535 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 16:15:58,535 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 16:15:58,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 16:15:58,536 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 16:15:58,536 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 16:15:58,536 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2021-08-25 16:15:58,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 16:15:58,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 16:15:58,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 16:15:58,800 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 16:15:58,801 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 16:15:58,801 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-08-25 16:15:58,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ef634e9/d524eca6fcba49dd88f05013db77a614/FLAGb1430e9c1 [2021-08-25 16:15:59,198 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 16:15:59,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-08-25 16:15:59,204 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ef634e9/d524eca6fcba49dd88f05013db77a614/FLAGb1430e9c1 [2021-08-25 16:15:59,215 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a2ef634e9/d524eca6fcba49dd88f05013db77a614 [2021-08-25 16:15:59,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 16:15:59,218 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 16:15:59,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 16:15:59,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 16:15:59,223 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 16:15:59,223 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,224 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c6ae474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59, skipping insertion in model container [2021-08-25 16:15:59,224 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,228 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 16:15:59,239 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 16:15:59,363 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-08-25 16:15:59,403 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:15:59,409 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 16:15:59,438 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i[1465,1478] [2021-08-25 16:15:59,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:15:59,447 INFO L208 MainTranslator]: Completed translation [2021-08-25 16:15:59,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59 WrapperNode [2021-08-25 16:15:59,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 16:15:59,450 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 16:15:59,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 16:15:59,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 16:15:59,454 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,470 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,495 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 16:15:59,496 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 16:15:59,496 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 16:15:59,496 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 16:15:59,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,508 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,509 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,521 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,525 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 16:15:59,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 16:15:59,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 16:15:59,534 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 16:15:59,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (1/1) ... [2021-08-25 16:15:59,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:15:59,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:59,557 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) [2021-08-25 16:15:59,578 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 [2021-08-25 16:15:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 16:15:59,592 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 16:15:59,593 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 16:15:59,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 16:15:59,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 16:15:59,593 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 16:15:59,593 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 16:15:59,815 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 16:15:59,815 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-25 16:15:59,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:59 BoogieIcfgContainer [2021-08-25 16:15:59,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 16:15:59,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 16:15:59,818 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 16:15:59,820 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 16:15:59,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 04:15:59" (1/3) ... [2021-08-25 16:15:59,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffcccb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:15:59, skipping insertion in model container [2021-08-25 16:15:59,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:59" (2/3) ... [2021-08-25 16:15:59,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ffcccb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:15:59, skipping insertion in model container [2021-08-25 16:15:59,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:59" (3/3) ... [2021-08-25 16:15:59,832 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2021-08-25 16:15:59,836 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 16:15:59,836 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 16:15:59,877 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 16:15:59,882 INFO L339 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, mConcurrency=FINITE_AUTOMATA, 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, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 16:15:59,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 16:15:59,891 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:59,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-25 16:15:59,894 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:59,895 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:59,895 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:59,899 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-08-25 16:15:59,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:59,904 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31225803] [2021-08-25 16:15:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:59,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:16:00,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:00,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31225803] [2021-08-25 16:16:00,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31225803] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:00,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:16:00,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 16:16:00,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996802995] [2021-08-25 16:16:00,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:00,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:00,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:00,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:16:00,024 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:00,041 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-08-25 16:16:00,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:00,042 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-25 16:16:00,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:00,047 INFO L225 Difference]: With dead ends: 58 [2021-08-25 16:16:00,047 INFO L226 Difference]: Without dead ends: 28 [2021-08-25 16:16:00,048 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:16:00,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-25 16:16:00,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-08-25 16:16:00,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-08-25 16:16:00,068 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-08-25 16:16:00,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:00,068 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-08-25 16:16:00,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,068 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-08-25 16:16:00,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 16:16:00,069 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:00,069 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:00,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 16:16:00,070 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:00,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:00,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-08-25 16:16:00,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:00,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438207004] [2021-08-25 16:16:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:00,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:00,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:16:00,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:00,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438207004] [2021-08-25 16:16:00,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438207004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:00,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152881060] [2021-08-25 16:16:00,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:00,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:00,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:00,106 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) [2021-08-25 16:16:00,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 16:16:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:00,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 16:16:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:00,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 16:16:00,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152881060] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:00,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:00,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:16:00,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545449042] [2021-08-25 16:16:00,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:00,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:00,271 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:00,315 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-08-25 16:16:00,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:00,315 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-25 16:16:00,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:00,317 INFO L225 Difference]: With dead ends: 57 [2021-08-25 16:16:00,317 INFO L226 Difference]: Without dead ends: 36 [2021-08-25 16:16:00,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:00,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-25 16:16:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-08-25 16:16:00,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-08-25 16:16:00,325 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-08-25 16:16:00,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:00,325 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-08-25 16:16:00,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-08-25 16:16:00,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 16:16:00,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:00,326 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-25 16:16:00,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:00,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:00,541 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:00,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:00,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-08-25 16:16:00,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:00,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051526748] [2021-08-25 16:16:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:00,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-25 16:16:00,576 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:00,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051526748] [2021-08-25 16:16:00,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051526748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:00,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647483639] [2021-08-25 16:16:00,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:00,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:00,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:00,582 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) [2021-08-25 16:16:00,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 16:16:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:00,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 16:16:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:00,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647483639] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:00,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:00,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:16:00,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502152788] [2021-08-25 16:16:00,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:00,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:00,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:00,731 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:00,740 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-08-25 16:16:00,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:00,742 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-25 16:16:00,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:00,742 INFO L225 Difference]: With dead ends: 46 [2021-08-25 16:16:00,742 INFO L226 Difference]: Without dead ends: 35 [2021-08-25 16:16:00,743 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:00,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-25 16:16:00,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-08-25 16:16:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-08-25 16:16:00,749 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-08-25 16:16:00,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:00,750 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-08-25 16:16:00,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:00,750 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-08-25 16:16:00,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 16:16:00,754 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:00,754 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-25 16:16:00,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-25 16:16:00,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-08-25 16:16:00,956 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:00,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:00,956 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-08-25 16:16:00,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:00,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295254482] [2021-08-25 16:16:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:00,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:00,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:00,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:00,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:00,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295254482] [2021-08-25 16:16:00,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295254482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:00,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609883172] [2021-08-25 16:16:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:00,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:00,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:01,000 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) [2021-08-25 16:16:01,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 16:16:01,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:01,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:01,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:01,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-25 16:16:01,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609883172] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:01,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:01,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:16:01,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598496319] [2021-08-25 16:16:01,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:16:01,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:01,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:16:01,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:01,153 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:01,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:01,175 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-08-25 16:16:01,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:16:01,176 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-25 16:16:01,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:01,176 INFO L225 Difference]: With dead ends: 78 [2021-08-25 16:16:01,176 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 16:16:01,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 16:16:01,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-08-25 16:16:01,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:01,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-08-25 16:16:01,181 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-08-25 16:16:01,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:01,181 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-08-25 16:16:01,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:01,181 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-08-25 16:16:01,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 16:16:01,182 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:01,182 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-25 16:16:01,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-25 16:16:01,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:01,395 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:01,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:01,396 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-08-25 16:16:01,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:01,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537833698] [2021-08-25 16:16:01,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:01,396 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:01,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:01,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:01,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537833698] [2021-08-25 16:16:01,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537833698] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:01,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477765497] [2021-08-25 16:16:01,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:01,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:01,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:01,433 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) [2021-08-25 16:16:01,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 16:16:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:01,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:16:01,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477765497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:01,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 16:16:01,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-25 16:16:01,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043873865] [2021-08-25 16:16:01,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:01,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:01,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:01,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:01,620 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:01,643 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-08-25 16:16:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:01,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-25 16:16:01,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:01,644 INFO L225 Difference]: With dead ends: 90 [2021-08-25 16:16:01,645 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 16:16:01,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:01,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 16:16:01,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-08-25 16:16:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:01,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-08-25 16:16:01,654 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-08-25 16:16:01,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:01,654 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-08-25 16:16:01,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:01,654 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-08-25 16:16:01,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-25 16:16:01,655 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:01,655 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-25 16:16:01,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:01,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:01,857 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:01,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:01,857 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-08-25 16:16:01,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:01,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106672800] [2021-08-25 16:16:01,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:01,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-25 16:16:01,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:01,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106672800] [2021-08-25 16:16:01,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106672800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:01,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700976888] [2021-08-25 16:16:01,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:01,918 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:01,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:01,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:01,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 16:16:02,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-25 16:16:02,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:02,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 16:16:02,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:02,221 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-25 16:16:02,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700976888] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:02,222 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:02,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-08-25 16:16:02,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018265961] [2021-08-25 16:16:02,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:02,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:02,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:02,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:02,223 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:02,283 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-08-25 16:16:02,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:02,283 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-08-25 16:16:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:02,284 INFO L225 Difference]: With dead ends: 114 [2021-08-25 16:16:02,284 INFO L226 Difference]: Without dead ends: 109 [2021-08-25 16:16:02,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-25 16:16:02,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-08-25 16:16:02,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:02,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-08-25 16:16:02,301 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-08-25 16:16:02,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:02,301 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-08-25 16:16:02,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:02,301 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-08-25 16:16:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-25 16:16:02,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:02,302 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:02,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:02,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:02,521 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:02,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:02,522 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-08-25 16:16:02,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:02,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849064989] [2021-08-25 16:16:02,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:02,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-25 16:16:02,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:02,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849064989] [2021-08-25 16:16:02,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849064989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:02,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323147643] [2021-08-25 16:16:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:02,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:02,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:02,562 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:02,567 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 16:16:02,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:02,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:16:02,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:02,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-25 16:16:02,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323147643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:02,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 16:16:02,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-25 16:16:02,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488859314] [2021-08-25 16:16:02,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:02,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:02,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:02,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:02,751 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:02,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:02,823 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-08-25 16:16:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-08-25 16:16:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:02,825 INFO L225 Difference]: With dead ends: 162 [2021-08-25 16:16:02,825 INFO L226 Difference]: Without dead ends: 96 [2021-08-25 16:16:02,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 13.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-25 16:16:02,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-08-25 16:16:02,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 89 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:02,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-08-25 16:16:02,830 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-08-25 16:16:02,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:02,830 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-08-25 16:16:02,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:02,830 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-08-25 16:16:02,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-25 16:16:02,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:02,831 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:02,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:03,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:03,050 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:03,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:03,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-08-25 16:16:03,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:03,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464774823] [2021-08-25 16:16:03,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:03,050 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:03,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:03,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323225613] [2021-08-25 16:16:03,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:03,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:03,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:03,067 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:03,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 16:16:03,173 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:03,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:03,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:16:03,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-25 16:16:03,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:03,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464774823] [2021-08-25 16:16:03,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:03,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323225613] [2021-08-25 16:16:03,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323225613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:03,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:03,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:16:03,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126079733] [2021-08-25 16:16:03,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:16:03,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:03,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:16:03,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:03,288 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:03,309 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-08-25 16:16:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:16:03,310 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-25 16:16:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:03,310 INFO L225 Difference]: With dead ends: 174 [2021-08-25 16:16:03,310 INFO L226 Difference]: Without dead ends: 93 [2021-08-25 16:16:03,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-25 16:16:03,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-08-25 16:16:03,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-08-25 16:16:03,327 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-08-25 16:16:03,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:03,327 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-08-25 16:16:03,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,328 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-08-25 16:16:03,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-25 16:16:03,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:03,333 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:03,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-08-25 16:16:03,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:03,550 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:03,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:03,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-08-25 16:16:03,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:03,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748937458] [2021-08-25 16:16:03,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:03,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:03,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 16:16:03,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:03,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748937458] [2021-08-25 16:16:03,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748937458] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:03,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:16:03,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:16:03,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394168846] [2021-08-25 16:16:03,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:16:03,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:03,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:16:03,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:03,589 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:03,624 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-08-25 16:16:03,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:03,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-25 16:16:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:03,625 INFO L225 Difference]: With dead ends: 177 [2021-08-25 16:16:03,625 INFO L226 Difference]: Without dead ends: 108 [2021-08-25 16:16:03,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-25 16:16:03,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-08-25 16:16:03,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-08-25 16:16:03,637 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-08-25 16:16:03,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:03,638 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-08-25 16:16:03,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,638 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-08-25 16:16:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-25 16:16:03,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:03,640 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 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] [2021-08-25 16:16:03,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 16:16:03,641 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:03,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:03,641 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-08-25 16:16:03,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:03,641 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182095332] [2021-08-25 16:16:03,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:03,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:03,651 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:03,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1046298886] [2021-08-25 16:16:03,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:03,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:03,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:03,656 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:03,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 16:16:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:03,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:16:03,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:03,901 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:03,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:03,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182095332] [2021-08-25 16:16:03,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:03,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046298886] [2021-08-25 16:16:03,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046298886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:03,902 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:03,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:16:03,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182349971] [2021-08-25 16:16:03,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:03,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:03,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:03,906 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:03,923 INFO L93 Difference]: Finished difference Result 158 states and 190 transitions. [2021-08-25 16:16:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:03,924 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-25 16:16:03,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:03,924 INFO L225 Difference]: With dead ends: 158 [2021-08-25 16:16:03,924 INFO L226 Difference]: Without dead ends: 86 [2021-08-25 16:16:03,925 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-25 16:16:03,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-08-25 16:16:03,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-08-25 16:16:03,927 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-08-25 16:16:03,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:03,928 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-08-25 16:16:03,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:03,928 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-08-25 16:16:03,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-25 16:16:03,928 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:03,928 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 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] [2021-08-25 16:16:03,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:04,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-25 16:16:04,137 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:04,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:04,137 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-08-25 16:16:04,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:04,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335490364] [2021-08-25 16:16:04,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:04,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:04,146 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:04,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878386378] [2021-08-25 16:16:04,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:04,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:04,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:04,147 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:04,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 16:16:04,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:04,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:04,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 16:16:04,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:04,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:04,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335490364] [2021-08-25 16:16:04,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:04,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878386378] [2021-08-25 16:16:04,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878386378] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:04,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:04,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 16:16:04,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106339779] [2021-08-25 16:16:04,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:04,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:04,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:04,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:04,421 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:04,437 INFO L93 Difference]: Finished difference Result 160 states and 192 transitions. [2021-08-25 16:16:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:04,438 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-25 16:16:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:04,438 INFO L225 Difference]: With dead ends: 160 [2021-08-25 16:16:04,438 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 16:16:04,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 16:16:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-25 16:16:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.197674418604651) internal successors, (103), 86 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:04,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 103 transitions. [2021-08-25 16:16:04,441 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 103 transitions. Word has length 56 [2021-08-25 16:16:04,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:04,441 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 103 transitions. [2021-08-25 16:16:04,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:04,441 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 103 transitions. [2021-08-25 16:16:04,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-25 16:16:04,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:04,441 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-08-25 16:16:04,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:04,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:04,646 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:04,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:04,647 INFO L82 PathProgramCache]: Analyzing trace with hash -970188902, now seen corresponding path program 3 times [2021-08-25 16:16:04,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:04,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798015280] [2021-08-25 16:16:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:04,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:04,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:04,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1162647264] [2021-08-25 16:16:04,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:04,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:04,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:04,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:04,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 16:16:04,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-25 16:16:04,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:04,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-08-25 16:16:04,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:04,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798015280] [2021-08-25 16:16:04,951 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:04,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162647264] [2021-08-25 16:16:04,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162647264] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:16:04,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:16:04,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:16:04,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085921572] [2021-08-25 16:16:04,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:16:04,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:04,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:16:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:04,952 INFO L87 Difference]: Start difference. First operand 87 states and 103 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:04,972 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2021-08-25 16:16:04,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:04,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-25 16:16:04,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:04,972 INFO L225 Difference]: With dead ends: 116 [2021-08-25 16:16:04,972 INFO L226 Difference]: Without dead ends: 68 [2021-08-25 16:16:04,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-25 16:16:04,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2021-08-25 16:16:04,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:04,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 66 transitions. [2021-08-25 16:16:04,974 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 66 transitions. Word has length 58 [2021-08-25 16:16:04,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:04,975 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 66 transitions. [2021-08-25 16:16:04,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:04,975 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 66 transitions. [2021-08-25 16:16:04,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-25 16:16:04,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:04,975 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 3, 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] [2021-08-25 16:16:04,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:05,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-25 16:16:05,193 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:05,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash -152540452, now seen corresponding path program 1 times [2021-08-25 16:16:05,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:05,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894511999] [2021-08-25 16:16:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:05,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:05,214 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:05,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368954980] [2021-08-25 16:16:05,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:05,214 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:05,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:05,217 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:05,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-25 16:16:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:05,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:16:05,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:05,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:05,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894511999] [2021-08-25 16:16:05,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:05,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368954980] [2021-08-25 16:16:05,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368954980] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:05,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:05,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 16:16:05,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071441048] [2021-08-25 16:16:05,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 16:16:05,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:05,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 16:16:05,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:05,548 INFO L87 Difference]: Start difference. First operand 59 states and 66 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:05,569 INFO L93 Difference]: Finished difference Result 106 states and 120 transitions. [2021-08-25 16:16:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 16:16:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-25 16:16:05,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:05,575 INFO L225 Difference]: With dead ends: 106 [2021-08-25 16:16:05,575 INFO L226 Difference]: Without dead ends: 62 [2021-08-25 16:16:05,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:05,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-25 16:16:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-08-25 16:16:05,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 60 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 68 transitions. [2021-08-25 16:16:05,578 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 68 transitions. Word has length 58 [2021-08-25 16:16:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:05,578 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 68 transitions. [2021-08-25 16:16:05,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:05,579 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 68 transitions. [2021-08-25 16:16:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-25 16:16:05,579 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:05,579 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 3, 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] [2021-08-25 16:16:05,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:05,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-25 16:16:05,793 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:05,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:05,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1155589794, now seen corresponding path program 2 times [2021-08-25 16:16:05,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:05,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782668297] [2021-08-25 16:16:05,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:05,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:05,801 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:05,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626096949] [2021-08-25 16:16:05,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:05,801 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:05,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:05,802 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:05,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-25 16:16:05,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:05,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:05,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 16:16:05,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:06,146 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:16:06,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:06,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782668297] [2021-08-25 16:16:06,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:06,147 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626096949] [2021-08-25 16:16:06,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626096949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:06,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:06,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 16:16:06,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316070475] [2021-08-25 16:16:06,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 16:16:06,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:06,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 16:16:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:06,148 INFO L87 Difference]: Start difference. First operand 61 states and 68 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:06,181 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2021-08-25 16:16:06,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 16:16:06,181 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-08-25 16:16:06,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:06,182 INFO L225 Difference]: With dead ends: 108 [2021-08-25 16:16:06,182 INFO L226 Difference]: Without dead ends: 64 [2021-08-25 16:16:06,182 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.8ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:06,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-25 16:16:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-08-25 16:16:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.1290322580645162) internal successors, (70), 62 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2021-08-25 16:16:06,185 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2021-08-25 16:16:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:06,185 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2021-08-25 16:16:06,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,185 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2021-08-25 16:16:06,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-25 16:16:06,185 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:06,185 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 3, 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] [2021-08-25 16:16:06,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:06,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-25 16:16:06,389 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1281634144, now seen corresponding path program 3 times [2021-08-25 16:16:06,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:06,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429648967] [2021-08-25 16:16:06,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:06,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:06,397 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:06,397 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [972348640] [2021-08-25 16:16:06,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:06,397 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:06,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:06,398 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:06,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-25 16:16:06,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-25 16:16:06,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:16:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-08-25 16:16:06,733 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:06,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429648967] [2021-08-25 16:16:06,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:06,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972348640] [2021-08-25 16:16:06,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972348640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:06,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:06,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-25 16:16:06,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112732222] [2021-08-25 16:16:06,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:16:06,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:06,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:16:06,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:06,734 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:06,753 INFO L93 Difference]: Finished difference Result 82 states and 91 transitions. [2021-08-25 16:16:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:16:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-08-25 16:16:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:06,757 INFO L225 Difference]: With dead ends: 82 [2021-08-25 16:16:06,757 INFO L226 Difference]: Without dead ends: 66 [2021-08-25 16:16:06,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:16:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-25 16:16:06,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-08-25 16:16:06,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-08-25 16:16:06,759 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 62 [2021-08-25 16:16:06,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:06,759 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-08-25 16:16:06,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:06,759 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-08-25 16:16:06,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-25 16:16:06,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:06,760 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 3, 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] [2021-08-25 16:16:06,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:06,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-25 16:16:06,970 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:06,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:06,971 INFO L82 PathProgramCache]: Analyzing trace with hash 377274978, now seen corresponding path program 4 times [2021-08-25 16:16:06,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:06,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390365552] [2021-08-25 16:16:06,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:06,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:06,978 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:06,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256478239] [2021-08-25 16:16:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:06,979 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:06,982 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:06,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-25 16:16:07,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:07,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:16:07,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-08-25 16:16:07,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:07,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390365552] [2021-08-25 16:16:07,340 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:07,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256478239] [2021-08-25 16:16:07,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256478239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:07,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:07,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:16:07,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508501508] [2021-08-25 16:16:07,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:07,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:07,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:07,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:07,347 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:07,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:07,398 INFO L93 Difference]: Finished difference Result 117 states and 133 transitions. [2021-08-25 16:16:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:16:07,398 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-25 16:16:07,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:07,399 INFO L225 Difference]: With dead ends: 117 [2021-08-25 16:16:07,399 INFO L226 Difference]: Without dead ends: 77 [2021-08-25 16:16:07,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.4ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-25 16:16:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 74. [2021-08-25 16:16:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-08-25 16:16:07,402 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 64 [2021-08-25 16:16:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:07,403 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-08-25 16:16:07,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-08-25 16:16:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-25 16:16:07,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:07,404 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 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] [2021-08-25 16:16:07,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:07,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:07,617 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:07,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:07,617 INFO L82 PathProgramCache]: Analyzing trace with hash -790114983, now seen corresponding path program 5 times [2021-08-25 16:16:07,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:07,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984118327] [2021-08-25 16:16:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:07,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:07,625 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:07,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659360627] [2021-08-25 16:16:07,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:07,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:07,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:07,629 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:07,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-25 16:16:07,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-25 16:16:07,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:16:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:08,066 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-08-25 16:16:08,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:08,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984118327] [2021-08-25 16:16:08,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:08,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659360627] [2021-08-25 16:16:08,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659360627] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:08,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:08,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:16:08,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823937961] [2021-08-25 16:16:08,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:16:08,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:08,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:16:08,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:08,067 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:08,153 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2021-08-25 16:16:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:16:08,154 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-25 16:16:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:08,155 INFO L225 Difference]: With dead ends: 132 [2021-08-25 16:16:08,155 INFO L226 Difference]: Without dead ends: 86 [2021-08-25 16:16:08,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.3ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:08,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-25 16:16:08,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2021-08-25 16:16:08,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0975609756097562) internal successors, (90), 82 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 90 transitions. [2021-08-25 16:16:08,158 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 90 transitions. Word has length 73 [2021-08-25 16:16:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:08,158 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 90 transitions. [2021-08-25 16:16:08,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 90 transitions. [2021-08-25 16:16:08,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-25 16:16:08,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:08,158 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:08,178 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:08,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-25 16:16:08,376 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 426299330, now seen corresponding path program 6 times [2021-08-25 16:16:08,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:08,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817014175] [2021-08-25 16:16:08,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:08,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:08,388 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:08,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [143300976] [2021-08-25 16:16:08,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:08,389 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:08,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:08,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:08,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-25 16:16:08,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-25 16:16:08,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:08,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:16:08,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:09,009 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-08-25 16:16:09,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:09,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817014175] [2021-08-25 16:16:09,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:09,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143300976] [2021-08-25 16:16:09,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143300976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:09,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:09,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:16:09,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035288975] [2021-08-25 16:16:09,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:09,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:09,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:09,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:09,010 INFO L87 Difference]: Start difference. First operand 83 states and 90 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:09,021 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2021-08-25 16:16:09,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:16:09,023 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-25 16:16:09,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:09,023 INFO L225 Difference]: With dead ends: 108 [2021-08-25 16:16:09,023 INFO L226 Difference]: Without dead ends: 86 [2021-08-25 16:16:09,024 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:09,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-25 16:16:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-08-25 16:16:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0952380952380953) internal successors, (92), 84 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 92 transitions. [2021-08-25 16:16:09,026 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 92 transitions. Word has length 82 [2021-08-25 16:16:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:09,026 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 92 transitions. [2021-08-25 16:16:09,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 92 transitions. [2021-08-25 16:16:09,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-08-25 16:16:09,026 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:09,026 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:09,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:09,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-25 16:16:09,231 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash -105690940, now seen corresponding path program 7 times [2021-08-25 16:16:09,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:09,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483354728] [2021-08-25 16:16:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:09,232 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:09,240 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:09,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1234158467] [2021-08-25 16:16:09,240 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:09,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:09,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:09,241 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:09,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-25 16:16:09,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:09,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 16:16:09,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:09,739 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-08-25 16:16:09,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:09,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483354728] [2021-08-25 16:16:09,739 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:09,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234158467] [2021-08-25 16:16:09,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234158467] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:09,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:09,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 16:16:09,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007568143] [2021-08-25 16:16:09,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 16:16:09,740 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:09,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 16:16:09,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:09,740 INFO L87 Difference]: Start difference. First operand 85 states and 92 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:09,764 INFO L93 Difference]: Finished difference Result 154 states and 168 transitions. [2021-08-25 16:16:09,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 16:16:09,775 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-08-25 16:16:09,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:09,775 INFO L225 Difference]: With dead ends: 154 [2021-08-25 16:16:09,775 INFO L226 Difference]: Without dead ends: 88 [2021-08-25 16:16:09,776 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.9ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:09,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-25 16:16:09,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-08-25 16:16:09,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0930232558139534) internal successors, (94), 86 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 94 transitions. [2021-08-25 16:16:09,778 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 94 transitions. Word has length 84 [2021-08-25 16:16:09,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:09,778 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 94 transitions. [2021-08-25 16:16:09,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 94 transitions. [2021-08-25 16:16:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-08-25 16:16:09,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:09,778 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:09,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:09,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:09,985 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:09,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:09,985 INFO L82 PathProgramCache]: Analyzing trace with hash 2063005894, now seen corresponding path program 8 times [2021-08-25 16:16:09,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:09,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655335937] [2021-08-25 16:16:09,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:09,986 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:09,994 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:09,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1341592667] [2021-08-25 16:16:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:09,995 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:09,997 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:09,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-25 16:16:10,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:10,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:10,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 16:16:10,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-08-25 16:16:10,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:10,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655335937] [2021-08-25 16:16:10,516 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:10,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341592667] [2021-08-25 16:16:10,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341592667] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:10,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:10,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 16:16:10,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907347712] [2021-08-25 16:16:10,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 16:16:10,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:10,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 16:16:10,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:10,518 INFO L87 Difference]: Start difference. First operand 87 states and 94 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:10,548 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-08-25 16:16:10,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 16:16:10,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2021-08-25 16:16:10,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:10,549 INFO L225 Difference]: With dead ends: 155 [2021-08-25 16:16:10,549 INFO L226 Difference]: Without dead ends: 89 [2021-08-25 16:16:10,550 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:10,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-25 16:16:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-25 16:16:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0909090909090908) internal successors, (96), 88 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 96 transitions. [2021-08-25 16:16:10,552 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 96 transitions. Word has length 86 [2021-08-25 16:16:10,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:10,552 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 96 transitions. [2021-08-25 16:16:10,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 96 transitions. [2021-08-25 16:16:10,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-25 16:16:10,553 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:10,553 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:10,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:10,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:10,769 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:10,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:10,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1173442488, now seen corresponding path program 9 times [2021-08-25 16:16:10,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:10,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352571723] [2021-08-25 16:16:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:10,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:10,784 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:10,785 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [854690886] [2021-08-25 16:16:10,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:10,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:10,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:10,786 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:10,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-25 16:16:11,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-25 16:16:11,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:11,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:16:11,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:11,440 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-08-25 16:16:11,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:11,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352571723] [2021-08-25 16:16:11,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:11,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854690886] [2021-08-25 16:16:11,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854690886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:11,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:11,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:16:11,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235961341] [2021-08-25 16:16:11,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:16:11,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:16:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:11,442 INFO L87 Difference]: Start difference. First operand 89 states and 96 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:11,494 INFO L93 Difference]: Finished difference Result 153 states and 173 transitions. [2021-08-25 16:16:11,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:16:11,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-25 16:16:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:11,494 INFO L225 Difference]: With dead ends: 153 [2021-08-25 16:16:11,494 INFO L226 Difference]: Without dead ends: 104 [2021-08-25 16:16:11,495 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:16:11,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-25 16:16:11,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2021-08-25 16:16:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.1134020618556701) internal successors, (108), 97 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 108 transitions. [2021-08-25 16:16:11,497 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 108 transitions. Word has length 88 [2021-08-25 16:16:11,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:11,497 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 108 transitions. [2021-08-25 16:16:11,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 108 transitions. [2021-08-25 16:16:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-25 16:16:11,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:11,498 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 6, 6, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:11,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:11,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:11,718 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:11,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:11,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1409703947, now seen corresponding path program 10 times [2021-08-25 16:16:11,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:11,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791511234] [2021-08-25 16:16:11,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:11,719 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:11,727 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:11,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278895824] [2021-08-25 16:16:11,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:11,728 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:11,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:11,729 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:11,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-25 16:16:12,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:12,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:16:12,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 213 trivial. 0 not checked. [2021-08-25 16:16:12,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:12,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791511234] [2021-08-25 16:16:12,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:12,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278895824] [2021-08-25 16:16:12,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278895824] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:12,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:12,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:16:12,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822818853] [2021-08-25 16:16:12,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:12,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:12,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:12,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:12,308 INFO L87 Difference]: Start difference. First operand 98 states and 108 transitions. Second operand has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:12,382 INFO L93 Difference]: Finished difference Result 173 states and 195 transitions. [2021-08-25 16:16:12,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:12,383 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-25 16:16:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:12,383 INFO L225 Difference]: With dead ends: 173 [2021-08-25 16:16:12,383 INFO L226 Difference]: Without dead ends: 110 [2021-08-25 16:16:12,384 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.9ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:12,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-25 16:16:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2021-08-25 16:16:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.1037735849056605) internal successors, (117), 106 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2021-08-25 16:16:12,387 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 97 [2021-08-25 16:16:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:12,387 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2021-08-25 16:16:12,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.571428571428571) internal successors, (46), 7 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:12,387 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2021-08-25 16:16:12,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-25 16:16:12,388 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:12,388 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:12,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:12,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-08-25 16:16:12,602 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:12,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:12,602 INFO L82 PathProgramCache]: Analyzing trace with hash -983224722, now seen corresponding path program 11 times [2021-08-25 16:16:12,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:12,602 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744999267] [2021-08-25 16:16:12,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:12,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:12,614 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:12,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118956417] [2021-08-25 16:16:12,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:12,615 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:12,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:12,615 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:12,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-25 16:16:13,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-25 16:16:13,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:13,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 16:16:13,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2021-08-25 16:16:13,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:13,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744999267] [2021-08-25 16:16:13,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:13,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118956417] [2021-08-25 16:16:13,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118956417] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:13,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:13,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 16:16:13,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25870616] [2021-08-25 16:16:13,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:13,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:13,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:13,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:13,303 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:13,382 INFO L93 Difference]: Finished difference Result 185 states and 207 transitions. [2021-08-25 16:16:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:13,382 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-25 16:16:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:13,383 INFO L225 Difference]: With dead ends: 185 [2021-08-25 16:16:13,383 INFO L226 Difference]: Without dead ends: 116 [2021-08-25 16:16:13,383 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.2ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:13,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-25 16:16:13,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-08-25 16:16:13,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0956521739130434) internal successors, (126), 115 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-08-25 16:16:13,386 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 106 [2021-08-25 16:16:13,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:13,386 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-08-25 16:16:13,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:13,387 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-08-25 16:16:13,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-25 16:16:13,387 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:13,387 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:13,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:13,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-25 16:16:13,605 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:13,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:13,605 INFO L82 PathProgramCache]: Analyzing trace with hash -700509419, now seen corresponding path program 12 times [2021-08-25 16:16:13,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:13,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822121249] [2021-08-25 16:16:13,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:13,605 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:13,613 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:13,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2102703787] [2021-08-25 16:16:13,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:13,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:13,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:13,614 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:13,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-25 16:16:14,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-25 16:16:14,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:14,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:16:14,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2021-08-25 16:16:14,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:14,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822121249] [2021-08-25 16:16:14,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:14,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102703787] [2021-08-25 16:16:14,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102703787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:14,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:14,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:16:14,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696954258] [2021-08-25 16:16:14,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:16:14,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:14,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:16:14,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:14,482 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:14,496 INFO L93 Difference]: Finished difference Result 150 states and 163 transitions. [2021-08-25 16:16:14,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:16:14,496 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-25 16:16:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:14,497 INFO L225 Difference]: With dead ends: 150 [2021-08-25 16:16:14,497 INFO L226 Difference]: Without dead ends: 119 [2021-08-25 16:16:14,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:16:14,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-25 16:16:14,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-08-25 16:16:14,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0940170940170941) internal successors, (128), 117 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:14,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 128 transitions. [2021-08-25 16:16:14,500 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 128 transitions. Word has length 115 [2021-08-25 16:16:14,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:14,500 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 128 transitions. [2021-08-25 16:16:14,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:14,500 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 128 transitions. [2021-08-25 16:16:14,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-08-25 16:16:14,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:14,501 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 8, 8, 8, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:14,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:14,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:14,709 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:14,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:14,709 INFO L82 PathProgramCache]: Analyzing trace with hash -111816429, now seen corresponding path program 13 times [2021-08-25 16:16:14,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:14,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421568554] [2021-08-25 16:16:14,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:14,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:14,716 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:14,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519940541] [2021-08-25 16:16:14,717 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:14,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:14,718 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:14,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-25 16:16:15,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:15,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 16:16:15,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-08-25 16:16:15,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:15,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421568554] [2021-08-25 16:16:15,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:15,449 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519940541] [2021-08-25 16:16:15,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519940541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:15,449 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:15,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 16:16:15,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639308772] [2021-08-25 16:16:15,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 16:16:15,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:15,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 16:16:15,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:15,450 INFO L87 Difference]: Start difference. First operand 118 states and 128 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:15,571 INFO L93 Difference]: Finished difference Result 202 states and 227 transitions. [2021-08-25 16:16:15,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 16:16:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-08-25 16:16:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:15,572 INFO L225 Difference]: With dead ends: 202 [2021-08-25 16:16:15,572 INFO L226 Difference]: Without dead ends: 133 [2021-08-25 16:16:15,573 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:15,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-25 16:16:15,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 127. [2021-08-25 16:16:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.1111111111111112) internal successors, (140), 126 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:15,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 140 transitions. [2021-08-25 16:16:15,576 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 140 transitions. Word has length 117 [2021-08-25 16:16:15,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:15,576 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 140 transitions. [2021-08-25 16:16:15,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:15,576 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 140 transitions. [2021-08-25 16:16:15,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-08-25 16:16:15,577 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:15,577 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 6, 6, 6, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:15,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:15,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:15,785 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:15,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:15,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1649695946, now seen corresponding path program 14 times [2021-08-25 16:16:15,785 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:15,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81680033] [2021-08-25 16:16:15,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:15,786 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:15,794 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:15,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [944797722] [2021-08-25 16:16:15,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:15,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:15,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:15,795 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:15,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-25 16:16:16,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:16,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:16,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-25 16:16:16,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:16,650 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2021-08-25 16:16:16,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:16,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81680033] [2021-08-25 16:16:16,650 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:16,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944797722] [2021-08-25 16:16:16,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944797722] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:16,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:16,651 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-08-25 16:16:16,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909636893] [2021-08-25 16:16:16,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-25 16:16:16,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:16,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-25 16:16:16,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:16,652 INFO L87 Difference]: Start difference. First operand 127 states and 140 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:16,764 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2021-08-25 16:16:16,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-25 16:16:16,765 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2021-08-25 16:16:16,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:16,765 INFO L225 Difference]: With dead ends: 211 [2021-08-25 16:16:16,766 INFO L226 Difference]: Without dead ends: 136 [2021-08-25 16:16:16,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-25 16:16:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-25 16:16:16,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2021-08-25 16:16:16,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.125925925925926) internal successors, (152), 135 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:16,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2021-08-25 16:16:16,769 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 126 [2021-08-25 16:16:16,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:16,769 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2021-08-25 16:16:16,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2021-08-25 16:16:16,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-25 16:16:16,770 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:16,770 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:16,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:16,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-25 16:16:16,993 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:16,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:16,993 INFO L82 PathProgramCache]: Analyzing trace with hash -242787085, now seen corresponding path program 15 times [2021-08-25 16:16:16,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:16,993 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289153056] [2021-08-25 16:16:16,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:16,993 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:17,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:17,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587203790] [2021-08-25 16:16:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:16:17,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:17,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:17,002 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:17,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-25 16:16:17,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-25 16:16:17,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:17,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:16:17,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:17,863 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-25 16:16:17,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:17,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289153056] [2021-08-25 16:16:17,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:17,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587203790] [2021-08-25 16:16:17,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587203790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:17,864 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:17,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:16:17,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408973305] [2021-08-25 16:16:17,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:16:17,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:17,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:16:17,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:17,865 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:17,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:17,891 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2021-08-25 16:16:17,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:16:17,891 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-08-25 16:16:17,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:17,892 INFO L225 Difference]: With dead ends: 176 [2021-08-25 16:16:17,892 INFO L226 Difference]: Without dead ends: 139 [2021-08-25 16:16:17,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.2ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:16:17,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-25 16:16:17,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2021-08-25 16:16:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.1240875912408759) internal successors, (154), 137 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:17,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 154 transitions. [2021-08-25 16:16:17,895 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 154 transitions. Word has length 135 [2021-08-25 16:16:17,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:17,895 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 154 transitions. [2021-08-25 16:16:17,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:17,895 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 154 transitions. [2021-08-25 16:16:17,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-08-25 16:16:17,896 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:17,896 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:17,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:18,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-25 16:16:18,109 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:18,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:18,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1975493873, now seen corresponding path program 16 times [2021-08-25 16:16:18,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:18,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849671247] [2021-08-25 16:16:18,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:18,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:18,117 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:18,117 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220405883] [2021-08-25 16:16:18,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:16:18,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:18,118 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:18,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-25 16:16:18,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:16:18,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:18,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 16:16:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:19,010 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-25 16:16:19,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:19,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849671247] [2021-08-25 16:16:19,011 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:19,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220405883] [2021-08-25 16:16:19,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220405883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:19,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:19,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 16:16:19,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697604984] [2021-08-25 16:16:19,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:16:19,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:19,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:16:19,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:19,012 INFO L87 Difference]: Start difference. First operand 138 states and 154 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:19,039 INFO L93 Difference]: Finished difference Result 178 states and 199 transitions. [2021-08-25 16:16:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:16:19,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2021-08-25 16:16:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:19,040 INFO L225 Difference]: With dead ends: 178 [2021-08-25 16:16:19,040 INFO L226 Difference]: Without dead ends: 141 [2021-08-25 16:16:19,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.1ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:16:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-25 16:16:19,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2021-08-25 16:16:19,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.1223021582733812) internal successors, (156), 139 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:19,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 156 transitions. [2021-08-25 16:16:19,043 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 156 transitions. Word has length 137 [2021-08-25 16:16:19,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:19,043 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 156 transitions. [2021-08-25 16:16:19,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:19,043 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 156 transitions. [2021-08-25 16:16:19,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-25 16:16:19,044 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:19,044 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:19,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:19,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-25 16:16:19,263 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:19,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:19,263 INFO L82 PathProgramCache]: Analyzing trace with hash -855251601, now seen corresponding path program 17 times [2021-08-25 16:16:19,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:19,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638558956] [2021-08-25 16:16:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:19,263 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:19,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:19,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2040314650] [2021-08-25 16:16:19,272 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:16:19,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:19,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:19,274 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:19,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-25 16:16:20,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-25 16:16:20,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:20,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:16:20,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-25 16:16:20,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:20,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638558956] [2021-08-25 16:16:20,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:20,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040314650] [2021-08-25 16:16:20,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040314650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:20,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:20,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 16:16:20,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863849124] [2021-08-25 16:16:20,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 16:16:20,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:20,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 16:16:20,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:20,364 INFO L87 Difference]: Start difference. First operand 140 states and 156 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:20,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:20,388 INFO L93 Difference]: Finished difference Result 180 states and 201 transitions. [2021-08-25 16:16:20,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 16:16:20,389 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-08-25 16:16:20,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:20,390 INFO L225 Difference]: With dead ends: 180 [2021-08-25 16:16:20,390 INFO L226 Difference]: Without dead ends: 143 [2021-08-25 16:16:20,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:16:20,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-25 16:16:20,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-08-25 16:16:20,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1205673758865249) internal successors, (158), 141 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:20,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 158 transitions. [2021-08-25 16:16:20,395 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 158 transitions. Word has length 139 [2021-08-25 16:16:20,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:20,395 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 158 transitions. [2021-08-25 16:16:20,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:20,395 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 158 transitions. [2021-08-25 16:16:20,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-08-25 16:16:20,396 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:20,396 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 7, 7, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:20,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-25 16:16:20,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-25 16:16:20,609 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1807613549, now seen corresponding path program 18 times [2021-08-25 16:16:20,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:20,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120352515] [2021-08-25 16:16:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:20,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:20,621 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:20,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [257221028] [2021-08-25 16:16:20,622 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-25 16:16:20,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:20,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:20,623 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:20,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-25 16:16:21,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-25 16:16:21,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:16:21,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-25 16:16:21,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:22,265 INFO L134 CoverageAnalysis]: Checked inductivity of 584 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-25 16:16:22,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:22,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120352515] [2021-08-25 16:16:22,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:22,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257221028] [2021-08-25 16:16:22,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257221028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:22,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:22,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 16:16:22,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075540824] [2021-08-25 16:16:22,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 16:16:22,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:22,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 16:16:22,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:22,266 INFO L87 Difference]: Start difference. First operand 142 states and 158 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:22,289 INFO L93 Difference]: Finished difference Result 182 states and 203 transitions. [2021-08-25 16:16:22,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 16:16:22,289 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-08-25 16:16:22,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:22,290 INFO L225 Difference]: With dead ends: 182 [2021-08-25 16:16:22,290 INFO L226 Difference]: Without dead ends: 145 [2021-08-25 16:16:22,290 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:16:22,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-25 16:16:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2021-08-25 16:16:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.118881118881119) internal successors, (160), 143 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 160 transitions. [2021-08-25 16:16:22,293 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 160 transitions. Word has length 141 [2021-08-25 16:16:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:22,293 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 160 transitions. [2021-08-25 16:16:22,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 160 transitions. [2021-08-25 16:16:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-08-25 16:16:22,294 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:22,294 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 8, 8, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:22,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:22,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:22,503 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:22,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:22,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1020514283, now seen corresponding path program 19 times [2021-08-25 16:16:22,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:22,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846254419] [2021-08-25 16:16:22,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:22,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:22,515 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:22,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1774614336] [2021-08-25 16:16:22,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-25 16:16:22,516 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:22,516 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:22,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-25 16:16:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:16:23,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 16:16:23,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:16:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-25 16:16:23,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:16:23,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846254419] [2021-08-25 16:16:23,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:16:23,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774614336] [2021-08-25 16:16:23,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774614336] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:16:23,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:16:23,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-25 16:16:23,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780041730] [2021-08-25 16:16:23,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-25 16:16:23,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:16:23,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-25 16:16:23,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:23,525 INFO L87 Difference]: Start difference. First operand 144 states and 160 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:16:23,548 INFO L93 Difference]: Finished difference Result 183 states and 204 transitions. [2021-08-25 16:16:23,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-25 16:16:23,548 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-08-25 16:16:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:16:23,549 INFO L225 Difference]: With dead ends: 183 [2021-08-25 16:16:23,549 INFO L226 Difference]: Without dead ends: 146 [2021-08-25 16:16:23,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:16:23,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-25 16:16:23,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-08-25 16:16:23,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.1172413793103448) internal successors, (162), 145 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:23,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2021-08-25 16:16:23,553 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 143 [2021-08-25 16:16:23,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:16:23,553 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2021-08-25 16:16:23,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:16:23,554 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2021-08-25 16:16:23,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-25 16:16:23,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:16:23,554 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:16:23,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:23,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:23,761 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:16:23,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:16:23,761 INFO L82 PathProgramCache]: Analyzing trace with hash 532363753, now seen corresponding path program 20 times [2021-08-25 16:16:23,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:16:23,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772978490] [2021-08-25 16:16:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:16:23,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:16:23,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:16:23,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556517541] [2021-08-25 16:16:23,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:16:23,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:16:23,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:16:23,781 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:16:23,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-25 16:16:24,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:16:24,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-25 16:16:24,901 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 16:16:25,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 16:16:25,238 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 16:16:25,238 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 16:16:25,239 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 16:16:25,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-25 16:16:25,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-08-25 16:16:25,457 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 16:16:25,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 04:16:25 BoogieIcfgContainer [2021-08-25 16:16:25,539 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 16:16:25,539 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 16:16:25,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 16:16:25,541 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 16:16:25,541 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:59" (3/4) ... [2021-08-25 16:16:25,542 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 16:16:25,617 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 16:16:25,617 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 16:16:25,618 INFO L168 Benchmark]: Toolchain (without parser) took 26399.61 ms. Allocated memory was 58.7 MB in the beginning and 406.8 MB in the end (delta: 348.1 MB). Free memory was 37.3 MB in the beginning and 129.0 MB in the end (delta: -91.6 MB). Peak memory consumption was 256.3 MB. Max. memory is 16.1 GB. [2021-08-25 16:16:25,618 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 40.8 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:16:25,619 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.80 ms. Allocated memory is still 58.7 MB. Free memory was 37.2 MB in the beginning and 41.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 16:16:25,619 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.66 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 39.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 16:16:25,619 INFO L168 Benchmark]: Boogie Preprocessor took 36.79 ms. Allocated memory is still 58.7 MB. Free memory was 39.2 MB in the beginning and 37.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:16:25,619 INFO L168 Benchmark]: RCFGBuilder took 283.32 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 37.9 MB in the beginning and 48.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. [2021-08-25 16:16:25,620 INFO L168 Benchmark]: TraceAbstraction took 25721.35 ms. Allocated memory was 73.4 MB in the beginning and 406.8 MB in the end (delta: 333.4 MB). Free memory was 48.1 MB in the beginning and 140.5 MB in the end (delta: -92.4 MB). Peak memory consumption was 241.1 MB. Max. memory is 16.1 GB. [2021-08-25 16:16:25,620 INFO L168 Benchmark]: Witness Printer took 77.55 ms. Allocated memory is still 406.8 MB. Free memory was 140.5 MB in the beginning and 129.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-25 16:16:25,622 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 40.8 MB in the beginning and 40.8 MB in the end (delta: 42.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 228.80 ms. Allocated memory is still 58.7 MB. Free memory was 37.2 MB in the beginning and 41.3 MB in the end (delta: -4.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.66 ms. Allocated memory is still 58.7 MB. Free memory was 41.3 MB in the beginning and 39.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 36.79 ms. Allocated memory is still 58.7 MB. Free memory was 39.2 MB in the beginning and 37.9 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 283.32 ms. Allocated memory was 58.7 MB in the beginning and 73.4 MB in the end (delta: 14.7 MB). Free memory was 37.9 MB in the beginning and 48.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 14.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 25721.35 ms. Allocated memory was 73.4 MB in the beginning and 406.8 MB in the end (delta: 333.4 MB). Free memory was 48.1 MB in the beginning and 140.5 MB in the end (delta: -92.4 MB). Peak memory consumption was 241.1 MB. Max. memory is 16.1 GB. * Witness Printer took 77.55 ms. Allocated memory is still 406.8 MB. Free memory was 140.5 MB in the beginning and 129.0 MB in the end (delta: 11.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[10]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 10 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 10) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<10 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<10 -1) [L57] x[10 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND FALSE !(i > 10/2) [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 10 [L29] COND TRUE i > 10/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 10) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 25580.3ms, OverallIterations: 32, TraceHistogramMax: 10, EmptinessCheckTime: 29.8ms, AutomataDifference: 1313.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 914 SDtfs, 601 SDslu, 1596 SDs, 0 SdLazy, 973 SolverSat, 298 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 758.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2304 GetRequests, 2140 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 621.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=146occurred in iteration=31, InterpolantAutomatonStates: 216, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 138.4ms AutomataMinimizationTime, 31 MinimizatonAttempts, 126 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 373.2ms SsaConstructionTime, 2686.8ms SatisfiabilityAnalysisTime, 5828.8ms InterpolantComputationTime, 2685 NumberOfCodeBlocks, 2397 NumberOfCodeBlocksAsserted, 102 NumberOfCheckSat, 2503 ConstructedInterpolants, 0 QuantifiedInterpolants, 3249 SizeOfPredicates, 8 NumberOfNonLiveVariables, 6483 ConjunctsInSsa, 189 ConjunctsInUnsatCore, 37 InterpolantComputations, 7 PerfectInterpolantSequences, 5483/6277 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-25 16:16:25,651 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...