./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 5fbdf5bf 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-wip.dd.seqcomp-5fbdf5b [2021-08-28 22:58:24,549 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-28 22:58:24,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-28 22:58:24,587 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-28 22:58:24,588 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-28 22:58:24,591 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-28 22:58:24,592 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-28 22:58:24,610 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-28 22:58:24,611 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-28 22:58:24,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-28 22:58:24,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-28 22:58:24,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-28 22:58:24,619 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-28 22:58:24,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-28 22:58:24,622 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-28 22:58:24,624 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-28 22:58:24,625 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-28 22:58:24,626 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-28 22:58:24,628 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-28 22:58:24,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-28 22:58:24,633 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-28 22:58:24,634 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-28 22:58:24,635 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-28 22:58:24,636 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-28 22:58:24,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-28 22:58:24,640 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-28 22:58:24,640 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-28 22:58:24,641 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-28 22:58:24,641 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-28 22:58:24,642 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-28 22:58:24,642 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-28 22:58:24,643 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-28 22:58:24,644 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-28 22:58:24,644 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-28 22:58:24,645 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-28 22:58:24,645 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-28 22:58:24,646 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-28 22:58:24,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-28 22:58:24,646 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-28 22:58:24,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-28 22:58:24,648 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-28 22:58:24,651 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-28 22:58:24,683 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-28 22:58:24,683 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-28 22:58:24,684 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-28 22:58:24,684 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-28 22:58:24,686 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-28 22:58:24,686 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-28 22:58:24,686 INFO L138 SettingsManager]: * Use SBE=true [2021-08-28 22:58:24,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-28 22:58:24,687 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-28 22:58:24,687 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-28 22:58:24,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-28 22:58:24,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-28 22:58:24,688 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-28 22:58:24,688 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-28 22:58:24,688 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-28 22:58:24,688 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-28 22:58:24,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-28 22:58:24,688 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-28 22:58:24,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-28 22:58:24,689 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-28 22:58:24,689 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-28 22:58:24,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-28 22:58:24,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-28 22:58:24,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-28 22:58:24,689 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-28 22:58:24,690 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-28 22:58:24,690 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-28 22:58:24,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-28 22:58:24,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-28 22:58:24,690 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-28 22:58:24,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c00c1225dae238bedea18c737f72ae44fea020a [2021-08-28 22:58:24,955 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-28 22:58:24,973 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-28 22:58:24,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-28 22:58:24,977 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-28 22:58:24,978 INFO L275 PluginConnector]: CDTParser initialized [2021-08-28 22:58:24,979 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-08-28 22:58:25,020 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f140c9c/aeb34c21c1e845a8b0ddfa4aa4eeb022/FLAG08a11cb7f [2021-08-28 22:58:25,417 INFO L306 CDTParser]: Found 1 translation units. [2021-08-28 22:58:25,418 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum10.i [2021-08-28 22:58:25,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f140c9c/aeb34c21c1e845a8b0ddfa4aa4eeb022/FLAG08a11cb7f [2021-08-28 22:58:25,434 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/13f140c9c/aeb34c21c1e845a8b0ddfa4aa4eeb022 [2021-08-28 22:58:25,436 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-28 22:58:25,438 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-28 22:58:25,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-28 22:58:25,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-28 22:58:25,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-28 22:58:25,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18525f37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25, skipping insertion in model container [2021-08-28 22:58:25,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-28 22:58:25,460 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-28 22:58:25,594 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] [2021-08-28 22:58:25,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-28 22:58:25,611 INFO L203 MainTranslator]: Completed pre-run [2021-08-28 22:58:25,653 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] [2021-08-28 22:58:25,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-28 22:58:25,662 INFO L208 MainTranslator]: Completed translation [2021-08-28 22:58:25,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25 WrapperNode [2021-08-28 22:58:25,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-28 22:58:25,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-28 22:58:25,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-28 22:58:25,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-28 22:58:25,668 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-28 22:58:25,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-28 22:58:25,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-28 22:58:25,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-28 22:58:25,709 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,721 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,734 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,735 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-28 22:58:25,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-28 22:58:25,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-28 22:58:25,737 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-28 22:58:25,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (1/1) ... [2021-08-28 22:58:25,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-28 22:58:25,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:25,757 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) [2021-08-28 22:58:25,764 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 [2021-08-28 22:58:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-28 22:58:25,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-28 22:58:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-28 22:58:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-28 22:58:25,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-28 22:58:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-28 22:58:25,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-28 22:58:26,015 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-28 22:58:26,015 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-28 22:58:26,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.08 10:58:26 BoogieIcfgContainer [2021-08-28 22:58:26,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-28 22:58:26,018 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-28 22:58:26,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-28 22:58:26,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-28 22:58:26,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.08 10:58:25" (1/3) ... [2021-08-28 22:58:26,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b44885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.08 10:58:26, skipping insertion in model container [2021-08-28 22:58:26,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.08 10:58:25" (2/3) ... [2021-08-28 22:58:26,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21b44885 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.08 10:58:26, skipping insertion in model container [2021-08-28 22:58:26,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.08 10:58:26" (3/3) ... [2021-08-28 22:58:26,024 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum10.i [2021-08-28 22:58:26,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-28 22:58:26,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-28 22:58:26,069 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-28 22:58:26,076 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 [2021-08-28 22:58:26,077 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-28 22:58:26,087 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) [2021-08-28 22:58:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-28 22:58:26,092 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:26,092 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:26,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:26,097 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-08-28 22:58:26,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:26,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508071068] [2021-08-28 22:58:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:26,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-28 22:58:26,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:26,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508071068] [2021-08-28 22:58:26,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508071068] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:26,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-28 22:58:26,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-28 22:58:26,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784420269] [2021-08-28 22:58:26,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:26,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:26,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:26,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-28 22:58:26,297 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) [2021-08-28 22:58:26,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:26,426 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-08-28 22:58:26,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:26,427 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 [2021-08-28 22:58:26,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:26,432 INFO L225 Difference]: With dead ends: 58 [2021-08-28 22:58:26,432 INFO L226 Difference]: Without dead ends: 28 [2021-08-28 22:58:26,434 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.56ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-28 22:58:26,436 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 97.45ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:26,439 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 79 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 97.45ms Time] [2021-08-28 22:58:26,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-28 22:58:26,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-08-28 22:58:26,459 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) [2021-08-28 22:58:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-08-28 22:58:26,460 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-08-28 22:58:26,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:26,462 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-08-28 22:58:26,462 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) [2021-08-28 22:58:26,462 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-08-28 22:58:26,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-28 22:58:26,467 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:26,467 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:26,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-28 22:58:26,467 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:26,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:26,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-08-28 22:58:26,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:26,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060887907] [2021-08-28 22:58:26,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:26,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-28 22:58:26,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:26,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060887907] [2021-08-28 22:58:26,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060887907] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:26,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12744208] [2021-08-28 22:58:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:26,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:26,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:26,516 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) [2021-08-28 22:58:26,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-28 22:58:26,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-28 22:58:26,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:26,614 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-28 22:58:26,615 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:26,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12744208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:26,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:26,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-28 22:58:26,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272518729] [2021-08-28 22:58:26,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:26,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:26,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:26,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:26,617 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) [2021-08-28 22:58:26,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:26,669 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-08-28 22:58:26,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:26,669 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 [2021-08-28 22:58:26,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:26,670 INFO L225 Difference]: With dead ends: 57 [2021-08-28 22:58:26,670 INFO L226 Difference]: Without dead ends: 36 [2021-08-28 22:58:26,670 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 7.02ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:26,671 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 35.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.83ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:26,672 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 76 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 44.83ms Time] [2021-08-28 22:58:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-28 22:58:26,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-08-28 22:58:26,675 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) [2021-08-28 22:58:26,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-08-28 22:58:26,676 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-08-28 22:58:26,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:26,676 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-08-28 22:58:26,676 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) [2021-08-28 22:58:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-08-28 22:58:26,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-28 22:58:26,677 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:26,677 INFO L513 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] [2021-08-28 22:58:26,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:26,892 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 [2021-08-28 22:58:26,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:26,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-08-28 22:58:26,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:26,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315320077] [2021-08-28 22:58:26,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:26,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:26,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-28 22:58:26,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:26,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315320077] [2021-08-28 22:58:26,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315320077] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:26,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085500328] [2021-08-28 22:58:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:26,934 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:26,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:26,935 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) [2021-08-28 22:58:26,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-28 22:58:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:26,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-28 22:58:26,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:27,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:27,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085500328] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:27,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:27,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-28 22:58:27,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725675870] [2021-08-28 22:58:27,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:27,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:27,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:27,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:27,056 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) [2021-08-28 22:58:27,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:27,105 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-08-28 22:58:27,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:27,105 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 [2021-08-28 22:58:27,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:27,107 INFO L225 Difference]: With dead ends: 46 [2021-08-28 22:58:27,107 INFO L226 Difference]: Without dead ends: 35 [2021-08-28 22:58:27,108 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.82ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:27,110 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.22ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:27,111 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 71 Unknown, 0 Unchecked, 0.57ms Time], IncrementalHoareTripleChecker [0 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 36.22ms Time] [2021-08-28 22:58:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-28 22:58:27,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-08-28 22:58:27,117 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) [2021-08-28 22:58:27,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-08-28 22:58:27,119 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-08-28 22:58:27,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:27,119 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-08-28 22:58:27,119 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) [2021-08-28 22:58:27,120 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-08-28 22:58:27,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-28 22:58:27,120 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:27,120 INFO L513 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] [2021-08-28 22:58:27,139 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:27,329 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 [2021-08-28 22:58:27,330 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:27,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:27,330 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-08-28 22:58:27,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:27,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272801343] [2021-08-28 22:58:27,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:27,331 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:27,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:27,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272801343] [2021-08-28 22:58:27,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272801343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:27,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842419177] [2021-08-28 22:58:27,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:27,369 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:27,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:27,375 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) [2021-08-28 22:58:27,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-28 22:58:27,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:27,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:27,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-28 22:58:27,473 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:27,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842419177] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:27,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:27,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-28 22:58:27,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329157729] [2021-08-28 22:58:27,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-28 22:58:27,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:27,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-28 22:58:27,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:27,475 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) [2021-08-28 22:58:27,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:27,530 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-08-28 22:58:27,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-28 22:58:27,530 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 [2021-08-28 22:58:27,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:27,531 INFO L225 Difference]: With dead ends: 78 [2021-08-28 22:58:27,531 INFO L226 Difference]: Without dead ends: 56 [2021-08-28 22:58:27,531 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 6.46ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-28 22:58:27,532 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.51ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.70ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:27,532 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 75 Unknown, 0 Unchecked, 0.51ms Time], IncrementalHoareTripleChecker [9 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 47.70ms Time] [2021-08-28 22:58:27,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-28 22:58:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-08-28 22:58:27,536 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) [2021-08-28 22:58:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-08-28 22:58:27,536 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-08-28 22:58:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:27,537 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-08-28 22:58:27,537 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) [2021-08-28 22:58:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-08-28 22:58:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-28 22:58:27,537 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:27,538 INFO L513 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] [2021-08-28 22:58:27,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:27,740 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 [2021-08-28 22:58:27,741 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:27,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:27,741 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-08-28 22:58:27,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:27,741 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879368351] [2021-08-28 22:58:27,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:27,742 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:27,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:27,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879368351] [2021-08-28 22:58:27,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879368351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:27,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028595857] [2021-08-28 22:58:27,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:27,777 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:27,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:27,781 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) [2021-08-28 22:58:27,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-28 22:58:27,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:27,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:27,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:27,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-28 22:58:27,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028595857] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:27,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-28 22:58:27,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-08-28 22:58:27,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663495371] [2021-08-28 22:58:27,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-28 22:58:27,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-28 22:58:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:27,975 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-08-28 22:58:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:28,048 INFO L93 Difference]: Finished difference Result 93 states and 127 transitions. [2021-08-28 22:58:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-28 22:58:28,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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 30 [2021-08-28 22:58:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:28,050 INFO L225 Difference]: With dead ends: 93 [2021-08-28 22:58:28,050 INFO L226 Difference]: Without dead ends: 52 [2021-08-28 22:58:28,051 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 14.19ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:28,052 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.60ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.24ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:28,052 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 115 Unknown, 0 Unchecked, 1.60ms Time], IncrementalHoareTripleChecker [4 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 57.24ms Time] [2021-08-28 22:58:28,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-28 22:58:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-28 22:58:28,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3333333333333333) internal successors, (68), 51 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) [2021-08-28 22:58:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 68 transitions. [2021-08-28 22:58:28,067 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 68 transitions. Word has length 30 [2021-08-28 22:58:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:28,067 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 68 transitions. [2021-08-28 22:58:28,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-08-28 22:58:28,068 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 68 transitions. [2021-08-28 22:58:28,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-28 22:58:28,070 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:28,070 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-28 22:58:28,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:28,284 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 [2021-08-28 22:58:28,285 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -195520200, now seen corresponding path program 2 times [2021-08-28 22:58:28,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:28,285 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907382680] [2021-08-28 22:58:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:28,286 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-08-28 22:58:28,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:28,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907382680] [2021-08-28 22:58:28,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907382680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:28,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899619610] [2021-08-28 22:58:28,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-28 22:58:28,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:28,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:28,337 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) [2021-08-28 22:58:28,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-28 22:58:28,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-28 22:58:28,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:28,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-28 22:58:28,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:28,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-08-28 22:58:28,546 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:28,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899619610] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:28,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-28 22:58:28,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-08-28 22:58:28,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885721716] [2021-08-28 22:58:28,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-28 22:58:28,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:28,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-28 22:58:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-28 22:58:28,547 INFO L87 Difference]: Start difference. First operand 52 states and 68 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) [2021-08-28 22:58:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:28,671 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2021-08-28 22:58:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-28 22:58:28,671 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 36 [2021-08-28 22:58:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:28,672 INFO L225 Difference]: With dead ends: 118 [2021-08-28 22:58:28,672 INFO L226 Difference]: Without dead ends: 113 [2021-08-28 22:58:28,672 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 40.42ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-28 22:58:28,672 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 60 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 75.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.15ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.50ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:28,673 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 0 Invalid, 179 Unknown, 0 Unchecked, 5.15ms Time], IncrementalHoareTripleChecker [8 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 95.50ms Time] [2021-08-28 22:58:28,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-08-28 22:58:28,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 77. [2021-08-28 22:58:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 76 states have internal predecessors, (102), 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) [2021-08-28 22:58:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 102 transitions. [2021-08-28 22:58:28,687 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 102 transitions. Word has length 36 [2021-08-28 22:58:28,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:28,687 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 102 transitions. [2021-08-28 22:58:28,687 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) [2021-08-28 22:58:28,687 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 102 transitions. [2021-08-28 22:58:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-28 22:58:28,691 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:28,691 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 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] [2021-08-28 22:58:28,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:28,896 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 [2021-08-28 22:58:28,897 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:28,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:28,897 INFO L82 PathProgramCache]: Analyzing trace with hash 570616873, now seen corresponding path program 1 times [2021-08-28 22:58:28,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:28,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863178416] [2021-08-28 22:58:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:28,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:28,909 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:28,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1555548837] [2021-08-28 22:58:28,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:28,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:28,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:28,910 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) [2021-08-28 22:58:28,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-28 22:58:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:28,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-28 22:58:28,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-28 22:58:29,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-28 22:58:29,162 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:29,162 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863178416] [2021-08-28 22:58:29,163 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:29,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555548837] [2021-08-28 22:58:29,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555548837] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:29,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:29,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-28 22:58:29,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846683407] [2021-08-28 22:58:29,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-28 22:58:29,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-28 22:58:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-28 22:58:29,164 INFO L87 Difference]: Start difference. First operand 77 states and 102 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 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) [2021-08-28 22:58:29,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:29,269 INFO L93 Difference]: Finished difference Result 155 states and 210 transitions. [2021-08-28 22:58:29,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-28 22:58:29,270 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 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 39 [2021-08-28 22:58:29,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:29,271 INFO L225 Difference]: With dead ends: 155 [2021-08-28 22:58:29,271 INFO L226 Difference]: Without dead ends: 89 [2021-08-28 22:58:29,271 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.49ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-28 22:58:29,272 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 15 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 76.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.82ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.18ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:29,272 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 0 Invalid, 227 Unknown, 0 Unchecked, 0.82ms Time], IncrementalHoareTripleChecker [7 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 96.18ms Time] [2021-08-28 22:58:29,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-28 22:58:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-08-28 22:58:29,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 88 states have internal predecessors, (114), 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) [2021-08-28 22:58:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-08-28 22:58:29,282 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 39 [2021-08-28 22:58:29,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:29,284 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-08-28 22:58:29,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 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) [2021-08-28 22:58:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-08-28 22:58:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-28 22:58:29,285 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:29,286 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 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] [2021-08-28 22:58:29,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:29,489 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 [2021-08-28 22:58:29,489 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:29,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:29,489 INFO L82 PathProgramCache]: Analyzing trace with hash -1964591075, now seen corresponding path program 2 times [2021-08-28 22:58:29,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:29,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333330721] [2021-08-28 22:58:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:29,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:29,531 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-08-28 22:58:29,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:29,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333330721] [2021-08-28 22:58:29,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333330721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-28 22:58:29,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266964246] [2021-08-28 22:58:29,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-28 22:58:29,532 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:29,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:29,537 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) [2021-08-28 22:58:29,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-28 22:58:29,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-28 22:58:29,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:29,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:29,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-08-28 22:58:29,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2021-08-28 22:58:29,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266964246] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:29,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-28 22:58:29,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-08-28 22:58:29,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68930266] [2021-08-28 22:58:29,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-28 22:58:29,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-28 22:58:29,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:29,754 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-08-28 22:58:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:29,847 INFO L93 Difference]: Finished difference Result 185 states and 255 transitions. [2021-08-28 22:58:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-28 22:58:29,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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 51 [2021-08-28 22:58:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:29,848 INFO L225 Difference]: With dead ends: 185 [2021-08-28 22:58:29,848 INFO L226 Difference]: Without dead ends: 125 [2021-08-28 22:58:29,849 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 23.54ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:29,849 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 35 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.73ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.68ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:29,849 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 0 Invalid, 165 Unknown, 0 Unchecked, 0.73ms Time], IncrementalHoareTripleChecker [30 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 84.68ms Time] [2021-08-28 22:58:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-28 22:58:29,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 110. [2021-08-28 22:58:29,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.201834862385321) internal successors, (131), 109 states have internal predecessors, (131), 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) [2021-08-28 22:58:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2021-08-28 22:58:29,861 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 51 [2021-08-28 22:58:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:29,861 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2021-08-28 22:58:29,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 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) [2021-08-28 22:58:29,862 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2021-08-28 22:58:29,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-08-28 22:58:29,863 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:29,863 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 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] [2021-08-28 22:58:29,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:30,064 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 [2021-08-28 22:58:30,064 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:30,064 INFO L82 PathProgramCache]: Analyzing trace with hash 91876059, now seen corresponding path program 1 times [2021-08-28 22:58:30,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:30,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771880619] [2021-08-28 22:58:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:30,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:30,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:30,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248146956] [2021-08-28 22:58:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:30,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:30,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:30,084 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) [2021-08-28 22:58:30,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-28 22:58:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:30,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-28 22:58:30,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:30,275 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-08-28 22:58:30,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:30,413 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 13 proven. 7 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-08-28 22:58:30,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:30,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771880619] [2021-08-28 22:58:30,413 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:30,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248146956] [2021-08-28 22:58:30,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248146956] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:30,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:30,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-08-28 22:58:30,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908060301] [2021-08-28 22:58:30,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-28 22:58:30,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:30,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-28 22:58:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-28 22:58:30,415 INFO L87 Difference]: Start difference. First operand 110 states and 131 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) [2021-08-28 22:58:30,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:30,535 INFO L93 Difference]: Finished difference Result 233 states and 288 transitions. [2021-08-28 22:58:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-28 22:58:30,535 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 75 [2021-08-28 22:58:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:30,536 INFO L225 Difference]: With dead ends: 233 [2021-08-28 22:58:30,536 INFO L226 Difference]: Without dead ends: 155 [2021-08-28 22:58:30,536 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.86ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-08-28 22:58:30,537 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 45 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 78.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.03ms SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.07ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:30,537 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 0 Invalid, 193 Unknown, 0 Unchecked, 1.03ms Time], IncrementalHoareTripleChecker [34 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 104.07ms Time] [2021-08-28 22:58:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-08-28 22:58:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2021-08-28 22:58:30,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.1103896103896105) internal successors, (171), 154 states have internal predecessors, (171), 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) [2021-08-28 22:58:30,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2021-08-28 22:58:30,542 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 75 [2021-08-28 22:58:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:30,543 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2021-08-28 22:58:30,543 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) [2021-08-28 22:58:30,543 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2021-08-28 22:58:30,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-08-28 22:58:30,543 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:30,543 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:30,564 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:30,744 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,SelfDestructingSolverStorable8 [2021-08-28 22:58:30,744 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:30,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1792640354, now seen corresponding path program 2 times [2021-08-28 22:58:30,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:30,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127919040] [2021-08-28 22:58:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:30,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:30,757 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:30,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222088692] [2021-08-28 22:58:30,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-28 22:58:30,758 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:30,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:30,759 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) [2021-08-28 22:58:30,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-28 22:58:30,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-28 22:58:30,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:30,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-28 22:58:30,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-08-28 22:58:30,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-08-28 22:58:31,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:31,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127919040] [2021-08-28 22:58:31,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:31,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222088692] [2021-08-28 22:58:31,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222088692] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:31,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:31,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-08-28 22:58:31,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59907177] [2021-08-28 22:58:31,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-28 22:58:31,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:31,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-28 22:58:31,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-28 22:58:31,209 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-08-28 22:58:31,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:31,370 INFO L93 Difference]: Finished difference Result 309 states and 368 transitions. [2021-08-28 22:58:31,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-28 22:58:31,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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 102 [2021-08-28 22:58:31,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:31,372 INFO L225 Difference]: With dead ends: 309 [2021-08-28 22:58:31,372 INFO L226 Difference]: Without dead ends: 200 [2021-08-28 22:58:31,372 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 63.10ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-08-28 22:58:31,373 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 90 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 112.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.44ms SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 142.27ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:31,373 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 0 Invalid, 262 Unknown, 0 Unchecked, 1.44ms Time], IncrementalHoareTripleChecker [55 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 142.27ms Time] [2021-08-28 22:58:31,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-08-28 22:58:31,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2021-08-28 22:58:31,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1608040201005025) internal successors, (231), 199 states have internal predecessors, (231), 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) [2021-08-28 22:58:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 231 transitions. [2021-08-28 22:58:31,378 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 231 transitions. Word has length 102 [2021-08-28 22:58:31,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:31,379 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 231 transitions. [2021-08-28 22:58:31,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 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) [2021-08-28 22:58:31,379 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 231 transitions. [2021-08-28 22:58:31,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-08-28 22:58:31,380 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:31,380 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-28 22:58:31,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:31,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-28 22:58:31,585 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:31,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:31,585 INFO L82 PathProgramCache]: Analyzing trace with hash -2138837509, now seen corresponding path program 3 times [2021-08-28 22:58:31,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:31,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482983021] [2021-08-28 22:58:31,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:31,586 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:31,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:31,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939918960] [2021-08-28 22:58:31,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-28 22:58:31,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:31,599 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) [2021-08-28 22:58:31,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-28 22:58:31,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-28 22:58:31,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:31,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-28 22:58:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-28 22:58:31,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-28 22:58:31,984 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:31,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482983021] [2021-08-28 22:58:31,984 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:31,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939918960] [2021-08-28 22:58:31,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939918960] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:31,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:31,985 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-08-28 22:58:31,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662728989] [2021-08-28 22:58:31,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-28 22:58:31,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:31,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-28 22:58:31,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-28 22:58:31,986 INFO L87 Difference]: Start difference. First operand 200 states and 231 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) [2021-08-28 22:58:32,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:32,040 INFO L93 Difference]: Finished difference Result 282 states and 329 transitions. [2021-08-28 22:58:32,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-28 22:58:32,040 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 129 [2021-08-28 22:58:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:32,041 INFO L225 Difference]: With dead ends: 282 [2021-08-28 22:58:32,041 INFO L226 Difference]: Without dead ends: 212 [2021-08-28 22:58:32,042 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.02ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-28 22:58:32,042 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.28ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.65ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:32,042 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 114 Unknown, 0 Unchecked, 0.28ms Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 47.65ms Time] [2021-08-28 22:58:32,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-08-28 22:58:32,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-08-28 22:58:32,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1516587677725119) internal successors, (243), 211 states have internal predecessors, (243), 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) [2021-08-28 22:58:32,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 243 transitions. [2021-08-28 22:58:32,048 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 243 transitions. Word has length 129 [2021-08-28 22:58:32,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:32,048 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 243 transitions. [2021-08-28 22:58:32,048 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) [2021-08-28 22:58:32,048 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 243 transitions. [2021-08-28 22:58:32,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-28 22:58:32,049 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:32,049 INFO L513 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] [2021-08-28 22:58:32,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:32,266 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,SelfDestructingSolverStorable10 [2021-08-28 22:58:32,267 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash -595875467, now seen corresponding path program 4 times [2021-08-28 22:58:32,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:32,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101121224] [2021-08-28 22:58:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:32,268 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:32,283 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:32,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484690740] [2021-08-28 22:58:32,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-28 22:58:32,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:32,284 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) [2021-08-28 22:58:32,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-28 22:58:32,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-28 22:58:32,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-28 22:58:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-28 22:58:32,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-08-28 22:58:32,536 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-28 22:58:32,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:32,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101121224] [2021-08-28 22:58:32,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:32,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484690740] [2021-08-28 22:58:32,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484690740] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-28 22:58:32,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-28 22:58:32,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-28 22:58:32,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140725263] [2021-08-28 22:58:32,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-28 22:58:32,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:32,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-28 22:58:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:32,538 INFO L87 Difference]: Start difference. First operand 212 states and 243 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 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) [2021-08-28 22:58:32,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:32,625 INFO L93 Difference]: Finished difference Result 349 states and 416 transitions. [2021-08-28 22:58:32,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-28 22:58:32,625 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 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 135 [2021-08-28 22:58:32,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:32,626 INFO L225 Difference]: With dead ends: 349 [2021-08-28 22:58:32,626 INFO L226 Difference]: Without dead ends: 226 [2021-08-28 22:58:32,627 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.26ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-28 22:58:32,627 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 74 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.67ms SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.87ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:32,627 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 0 Invalid, 173 Unknown, 0 Unchecked, 0.67ms Time], IncrementalHoareTripleChecker [15 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 76.87ms Time] [2021-08-28 22:58:32,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-08-28 22:58:32,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 136. [2021-08-28 22:58:32,631 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) [2021-08-28 22:58:32,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 152 transitions. [2021-08-28 22:58:32,632 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 152 transitions. Word has length 135 [2021-08-28 22:58:32,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:32,632 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 152 transitions. [2021-08-28 22:58:32,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 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) [2021-08-28 22:58:32,632 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 152 transitions. [2021-08-28 22:58:32,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-08-28 22:58:32,633 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:32,633 INFO L513 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] [2021-08-28 22:58:32,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:32,839 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,SelfDestructingSolverStorable11 [2021-08-28 22:58:32,840 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:32,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:32,840 INFO L82 PathProgramCache]: Analyzing trace with hash -242787085, now seen corresponding path program 1 times [2021-08-28 22:58:32,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:32,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736665533] [2021-08-28 22:58:32,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:32,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:32,850 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:32,851 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473840562] [2021-08-28 22:58:32,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:32,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:32,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:32,854 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) [2021-08-28 22:58:32,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-28 22:58:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-28 22:58:32,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-28 22:58:32,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-28 22:58:33,078 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-28 22:58:33,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-28 22:58:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2021-08-28 22:58:33,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-28 22:58:33,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736665533] [2021-08-28 22:58:33,278 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-28 22:58:33,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473840562] [2021-08-28 22:58:33,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473840562] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-28 22:58:33,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-28 22:58:33,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-28 22:58:33,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776944085] [2021-08-28 22:58:33,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-28 22:58:33,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-28 22:58:33,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-28 22:58:33,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-28 22:58:33,279 INFO L87 Difference]: Start difference. First operand 136 states and 152 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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) [2021-08-28 22:58:33,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-28 22:58:33,367 INFO L93 Difference]: Finished difference Result 183 states and 208 transitions. [2021-08-28 22:58:33,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-28 22:58:33,367 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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 135 [2021-08-28 22:58:33,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-28 22:58:33,368 INFO L225 Difference]: With dead ends: 183 [2021-08-28 22:58:33,368 INFO L226 Difference]: Without dead ends: 146 [2021-08-28 22:58:33,368 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 258 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.04ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-08-28 22:58:33,369 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.91ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.47ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.02ms IncrementalHoareTripleChecker+Time [2021-08-28 22:58:33,369 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 172 Unknown, 0 Unchecked, 0.47ms Time], IncrementalHoareTripleChecker [2 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 81.02ms Time] [2021-08-28 22:58:33,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-08-28 22:58:33,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2021-08-28 22:58:33,372 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) [2021-08-28 22:58:33,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 162 transitions. [2021-08-28 22:58:33,373 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 162 transitions. Word has length 135 [2021-08-28 22:58:33,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-28 22:58:33,373 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 162 transitions. [2021-08-28 22:58:33,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 11 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) [2021-08-28 22:58:33,373 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 162 transitions. [2021-08-28 22:58:33,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-28 22:58:33,374 INFO L505 BasicCegarLoop]: Found error trace [2021-08-28 22:58:33,374 INFO L513 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] [2021-08-28 22:58:33,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:33,593 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,SelfDestructingSolverStorable12 [2021-08-28 22:58:33,593 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-28 22:58:33,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-28 22:58:33,594 INFO L82 PathProgramCache]: Analyzing trace with hash 532363753, now seen corresponding path program 2 times [2021-08-28 22:58:33,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-28 22:58:33,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676166343] [2021-08-28 22:58:33,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-28 22:58:33,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-28 22:58:33,603 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-28 22:58:33,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1365198072] [2021-08-28 22:58:33,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-28 22:58:33,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-28 22:58:33,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-28 22:58:33,606 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) [2021-08-28 22:58:33,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-28 22:58:34,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-28 22:58:34,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-28 22:58:34,066 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-28 22:58:34,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-28 22:58:34,419 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-28 22:58:34,419 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-28 22:58:34,420 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-28 22:58:34,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-28 22:58:34,629 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,SelfDestructingSolverStorable13 [2021-08-28 22:58:34,633 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-28 22:58:34,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.08 10:58:34 BoogieIcfgContainer [2021-08-28 22:58:34,756 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-28 22:58:34,756 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-28 22:58:34,756 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-28 22:58:34,757 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-28 22:58:34,757 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.08 10:58:26" (3/4) ... [2021-08-28 22:58:34,758 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-28 22:58:34,830 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-28 22:58:34,830 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-28 22:58:34,831 INFO L158 Benchmark]: Toolchain (without parser) took 9393.27ms. Allocated memory was 56.6MB in the beginning and 119.5MB in the end (delta: 62.9MB). Free memory was 35.1MB in the beginning and 84.7MB in the end (delta: -49.6MB). Peak memory consumption was 12.2MB. Max. memory is 16.1GB. [2021-08-28 22:58:34,831 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-28 22:58:34,831 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.33ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 39.8MB in the end (delta: -4.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-28 22:58:34,832 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.24ms. Allocated memory is still 56.6MB. Free memory was 39.8MB in the beginning and 37.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-28 22:58:34,832 INFO L158 Benchmark]: Boogie Preprocessor took 33.21ms. Allocated memory is still 56.6MB. Free memory was 37.8MB in the beginning and 36.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-28 22:58:34,832 INFO L158 Benchmark]: RCFGBuilder took 279.82ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 36.3MB in the beginning and 51.2MB in the end (delta: -14.9MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-08-28 22:58:34,833 INFO L158 Benchmark]: TraceAbstraction took 8737.59ms. Allocated memory was 69.2MB in the beginning and 119.5MB in the end (delta: 50.3MB). Free memory was 50.7MB in the beginning and 96.2MB in the end (delta: -45.5MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. [2021-08-28 22:58:34,833 INFO L158 Benchmark]: Witness Printer took 74.09ms. Allocated memory is still 119.5MB. Free memory was 96.2MB in the beginning and 84.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-28 22:58:34,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 56.6MB. Free memory was 38.7MB in the beginning and 38.7MB in the end (delta: 46.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 222.33ms. Allocated memory is still 56.6MB. Free memory was 35.0MB in the beginning and 39.8MB in the end (delta: -4.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.24ms. Allocated memory is still 56.6MB. Free memory was 39.8MB in the beginning and 37.8MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.21ms. Allocated memory is still 56.6MB. Free memory was 37.8MB in the beginning and 36.4MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 279.82ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 36.3MB in the beginning and 51.2MB in the end (delta: -14.9MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. * TraceAbstraction took 8737.59ms. Allocated memory was 69.2MB in the beginning and 119.5MB in the end (delta: 50.3MB). Free memory was 50.7MB in the beginning and 96.2MB in the end (delta: -45.5MB). Peak memory consumption was 55.7MB. Max. memory is 16.1GB. * Witness Printer took 74.09ms. Allocated memory is still 119.5MB. Free memory was 96.2MB in the beginning and 84.7MB in the end (delta: 11.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms 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: 8564.00ms, OverallIterations: 14, TraceHistogramMax: 10, EmptinessCheckTime: 25.02ms, AutomataDifference: 1286.22ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.93ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 364 SdHoareTripleChecker+Valid, 1011.68ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 364 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 767.89ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 846 mSDsCounter, 176 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1725 IncrementalHoareTripleChecker+Invalid, 1901 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 176 mSolverCounterUnsat, 0 mSDtfsCounter, 1725 mSolverCounterSat, 14.73ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1379 GetRequests, 1304 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 298.78ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=212occurred in iteration=11, InterpolantAutomatonStates: 88, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 97.82ms AutomataMinimizationTime, 13 MinimizatonAttempts, 156 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 157.91ms SsaConstructionTime, 788.86ms SatisfiabilityAnalysisTime, 2590.42ms InterpolantComputationTime, 1165 NumberOfCodeBlocks, 1047 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 1555 ConstructedInterpolants, 0 QuantifiedInterpolants, 1997 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2487 ConjunctsInSsa, 60 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 3898/4128 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! [2021-08-28 22:58:34,872 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...