./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/reducercommutativity/rangesum.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 a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 16:15:34,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 16:15:34,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 16:15:34,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 16:15:34,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 16:15:34,537 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 16:15:34,539 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 16:15:34,541 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 16:15:34,544 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 16:15:34,544 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 16:15:34,545 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 16:15:34,547 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 16:15:34,549 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 16:15:34,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 16:15:34,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 16:15:34,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 16:15:34,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 16:15:34,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 16:15:34,559 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 16:15:34,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 16:15:34,563 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 16:15:34,564 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 16:15:34,565 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 16:15:34,566 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 16:15:34,569 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 16:15:34,574 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 16:15:34,574 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 16:15:34,575 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 16:15:34,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 16:15:34,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 16:15:34,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 16:15:34,576 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 16:15:34,577 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 16:15:34,577 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 16:15:34,579 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 16:15:34,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 16:15:34,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 16:15:34,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 16:15:34,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 16:15:34,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 16:15:34,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 16:15:34,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 16:15:34,616 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 16:15:34,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 16:15:34,617 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 16:15:34,617 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 16:15:34,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 16:15:34,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 16:15:34,618 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 16:15:34,619 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 16:15:34,619 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 16:15:34,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 16:15:34,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 16:15:34,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 16:15:34,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 16:15:34,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 16:15:34,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 16:15:34,620 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 16:15:34,620 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 16:15:34,620 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 16:15:34,620 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 16:15:34,621 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 16:15:34,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 16:15:34,621 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 16:15:34,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:15:34,621 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 16:15:34,621 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 16:15:34,622 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 16:15:34,622 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 16:15:34,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 16:15:34,622 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 16:15:34,622 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 16:15:34,622 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a9e9e68a4ced07da63a78ebad1c2cc86cbb57dae [2021-08-25 16:15:34,847 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 16:15:34,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 16:15:34,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 16:15:34,868 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 16:15:34,868 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 16:15:34,869 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum.i [2021-08-25 16:15:34,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fc134cc/69c96571bd584ed88f9e56ca6006bf76/FLAGa5068616e [2021-08-25 16:15:35,292 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 16:15:35,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum.i [2021-08-25 16:15:35,298 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fc134cc/69c96571bd584ed88f9e56ca6006bf76/FLAGa5068616e [2021-08-25 16:15:35,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3fc134cc/69c96571bd584ed88f9e56ca6006bf76 [2021-08-25 16:15:35,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 16:15:35,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 16:15:35,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 16:15:35,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 16:15:35,719 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 16:15:35,720 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@582d59e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35, skipping insertion in model container [2021-08-25 16:15:35,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 16:15:35,737 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 16:15:35,841 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/rangesum.i[1544,1557] [2021-08-25 16:15:35,848 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:15:35,853 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 16:15:35,886 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/rangesum.i[1544,1557] [2021-08-25 16:15:35,887 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:15:35,902 INFO L208 MainTranslator]: Completed translation [2021-08-25 16:15:35,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35 WrapperNode [2021-08-25 16:15:35,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 16:15:35,904 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 16:15:35,904 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 16:15:35,904 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 16:15:35,916 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 16:15:35,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 16:15:35,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 16:15:35,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 16:15:35,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,986 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:35,996 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:36,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 16:15:36,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 16:15:36,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 16:15:36,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 16:15:36,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (1/1) ... [2021-08-25 16:15:36,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:15:36,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:36,022 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-25 16:15:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 16:15:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 16:15:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 16:15:36,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 16:15:36,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-25 16:15:36,056 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 16:15:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 16:15:36,064 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 16:15:36,380 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 16:15:36,385 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-25 16:15:36,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:36 BoogieIcfgContainer [2021-08-25 16:15:36,386 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 16:15:36,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 16:15:36,388 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 16:15:36,391 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 16:15:36,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 04:15:35" (1/3) ... [2021-08-25 16:15:36,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f544b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:15:36, skipping insertion in model container [2021-08-25 16:15:36,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:35" (2/3) ... [2021-08-25 16:15:36,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f544b3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:15:36, skipping insertion in model container [2021-08-25 16:15:36,392 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:36" (3/3) ... [2021-08-25 16:15:36,393 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum.i [2021-08-25 16:15:36,397 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 16:15:36,397 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 16:15:36,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 16:15:36,445 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-25 16:15:36,445 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 16:15:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:36,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 16:15:36,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:36,460 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:36,461 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:36,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:36,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1829542603, now seen corresponding path program 1 times [2021-08-25 16:15:36,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:36,474 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475693018] [2021-08-25 16:15:36,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:36,474 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:36,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:15:36,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:36,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475693018] [2021-08-25 16:15:36,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475693018] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:36,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:36,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-25 16:15:36,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670131159] [2021-08-25 16:15:36,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-25 16:15:36,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:36,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-25 16:15:36,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 16:15:36,625 INFO L87 Difference]: Start difference. First operand has 32 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 31 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) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:36,639 INFO L93 Difference]: Finished difference Result 59 states and 90 transitions. [2021-08-25 16:15:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-25 16:15:36,641 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 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 18 [2021-08-25 16:15:36,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:36,645 INFO L225 Difference]: With dead ends: 59 [2021-08-25 16:15:36,646 INFO L226 Difference]: Without dead ends: 27 [2021-08-25 16:15:36,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-25 16:15:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-25 16:15:36,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-25 16:15:36,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:36,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-08-25 16:15:36,691 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2021-08-25 16:15:36,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:36,692 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-08-25 16:15:36,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:36,692 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-08-25 16:15:36,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 16:15:36,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:36,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:36,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 16:15:36,696 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:36,698 INFO L82 PathProgramCache]: Analyzing trace with hash -97699309, now seen corresponding path program 1 times [2021-08-25 16:15:36,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:36,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883910127] [2021-08-25 16:15:36,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:36,699 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:36,720 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:36,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60049658] [2021-08-25 16:15:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:36,721 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:36,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:36,722 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:36,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 16:15:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:36,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:15:36,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:15:36,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:36,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883910127] [2021-08-25 16:15:36,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:36,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60049658] [2021-08-25 16:15:36,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60049658] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:36,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:36,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 16:15:36,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332493045] [2021-08-25 16:15:36,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:15:36,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:36,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:15:36,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:15:36,953 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:37,015 INFO L93 Difference]: Finished difference Result 65 states and 90 transitions. [2021-08-25 16:15:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:15:37,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-08-25 16:15:37,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:37,017 INFO L225 Difference]: With dead ends: 65 [2021-08-25 16:15:37,017 INFO L226 Difference]: Without dead ends: 48 [2021-08-25 16:15:37,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:15:37,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-25 16:15:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 39. [2021-08-25 16:15:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.4473684210526316) internal successors, (55), 38 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 55 transitions. [2021-08-25 16:15:37,024 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 55 transitions. Word has length 18 [2021-08-25 16:15:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:37,024 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 55 transitions. [2021-08-25 16:15:37,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,027 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 55 transitions. [2021-08-25 16:15:37,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-25 16:15:37,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:37,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:37,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:37,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:37,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash 840584081, now seen corresponding path program 1 times [2021-08-25 16:15:37,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:37,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112285906] [2021-08-25 16:15:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:37,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:37,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:15:37,305 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:37,305 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112285906] [2021-08-25 16:15:37,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112285906] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:37,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:37,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 16:15:37,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903300788] [2021-08-25 16:15:37,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:15:37,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:37,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:15:37,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:15:37,307 INFO L87 Difference]: Start difference. First operand 39 states and 55 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:37,366 INFO L93 Difference]: Finished difference Result 75 states and 107 transitions. [2021-08-25 16:15:37,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:15:37,381 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 18 [2021-08-25 16:15:37,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:37,381 INFO L225 Difference]: With dead ends: 75 [2021-08-25 16:15:37,381 INFO L226 Difference]: Without dead ends: 41 [2021-08-25 16:15:37,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:15:37,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-25 16:15:37,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-08-25 16:15:37,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 56 transitions. [2021-08-25 16:15:37,385 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 56 transitions. Word has length 18 [2021-08-25 16:15:37,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:37,386 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 56 transitions. [2021-08-25 16:15:37,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,386 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 56 transitions. [2021-08-25 16:15:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-25 16:15:37,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:37,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:37,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-25 16:15:37,387 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:37,387 INFO L82 PathProgramCache]: Analyzing trace with hash 708198959, now seen corresponding path program 1 times [2021-08-25 16:15:37,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:37,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646959384] [2021-08-25 16:15:37,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:37,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 16:15:37,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:37,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646959384] [2021-08-25 16:15:37,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646959384] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:37,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:37,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:15:37,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141202304] [2021-08-25 16:15:37,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:15:37,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:37,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:15:37,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:37,450 INFO L87 Difference]: Start difference. First operand 40 states and 56 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:37,553 INFO L93 Difference]: Finished difference Result 79 states and 114 transitions. [2021-08-25 16:15:37,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:15:37,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 20 [2021-08-25 16:15:37,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:37,554 INFO L225 Difference]: With dead ends: 79 [2021-08-25 16:15:37,554 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 16:15:37,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 16:15:37,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-08-25 16:15:37,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-08-25 16:15:37,559 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 20 [2021-08-25 16:15:37,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:37,559 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-08-25 16:15:37,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,560 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-08-25 16:15:37,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-25 16:15:37,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:37,560 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:37,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-25 16:15:37,561 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:37,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:37,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1766254929, now seen corresponding path program 1 times [2021-08-25 16:15:37,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:37,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093207069] [2021-08-25 16:15:37,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:37,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:37,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:37,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:15:37,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:37,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093207069] [2021-08-25 16:15:37,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093207069] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:37,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:37,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:15:37,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120035084] [2021-08-25 16:15:37,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:15:37,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:15:37,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:37,625 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:37,680 INFO L93 Difference]: Finished difference Result 63 states and 84 transitions. [2021-08-25 16:15:37,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:15:37,681 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 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 29 [2021-08-25 16:15:37,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:37,682 INFO L225 Difference]: With dead ends: 63 [2021-08-25 16:15:37,682 INFO L226 Difference]: Without dead ends: 48 [2021-08-25 16:15:37,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-25 16:15:37,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-08-25 16:15:37,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3695652173913044) internal successors, (63), 46 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2021-08-25 16:15:37,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 29 [2021-08-25 16:15:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:37,699 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2021-08-25 16:15:37,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2021-08-25 16:15:37,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-25 16:15:37,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:37,700 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:37,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-25 16:15:37,701 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:37,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1224510417, now seen corresponding path program 1 times [2021-08-25 16:15:37,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:37,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243185984] [2021-08-25 16:15:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:37,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:37,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:37,811 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-25 16:15:37,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:37,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243185984] [2021-08-25 16:15:37,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243185984] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:37,812 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:37,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-08-25 16:15:37,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165519473] [2021-08-25 16:15:37,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:15:37,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:37,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:15:37,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:15:37,813 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:37,856 INFO L93 Difference]: Finished difference Result 113 states and 142 transitions. [2021-08-25 16:15:37,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:15:37,857 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 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 31 [2021-08-25 16:15:37,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:37,858 INFO L225 Difference]: With dead ends: 113 [2021-08-25 16:15:37,858 INFO L226 Difference]: Without dead ends: 108 [2021-08-25 16:15:37,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 38.1ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:15:37,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-25 16:15:37,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 72. [2021-08-25 16:15:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 71 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 97 transitions. [2021-08-25 16:15:37,863 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 97 transitions. Word has length 31 [2021-08-25 16:15:37,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:37,864 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 97 transitions. [2021-08-25 16:15:37,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:37,864 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 97 transitions. [2021-08-25 16:15:37,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-25 16:15:37,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:37,869 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:37,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-25 16:15:37,870 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:37,870 INFO L82 PathProgramCache]: Analyzing trace with hash -943608246, now seen corresponding path program 1 times [2021-08-25 16:15:37,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:37,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907037970] [2021-08-25 16:15:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:37,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:37,894 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:37,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855322586] [2021-08-25 16:15:37,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:37,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:37,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:37,907 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:37,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 16:15:37,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:37,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:15:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-25 16:15:38,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:38,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907037970] [2021-08-25 16:15:38,114 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:38,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855322586] [2021-08-25 16:15:38,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855322586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:38,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:38,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-25 16:15:38,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44579437] [2021-08-25 16:15:38,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:15:38,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:38,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:15:38,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:38,117 INFO L87 Difference]: Start difference. First operand 72 states and 97 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:38,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:38,162 INFO L93 Difference]: Finished difference Result 141 states and 191 transitions. [2021-08-25 16:15:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:15:38,162 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 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 34 [2021-08-25 16:15:38,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:38,166 INFO L225 Difference]: With dead ends: 141 [2021-08-25 16:15:38,166 INFO L226 Difference]: Without dead ends: 75 [2021-08-25 16:15:38,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:38,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-25 16:15:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-08-25 16:15:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.356164383561644) internal successors, (99), 73 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:38,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2021-08-25 16:15:38,178 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 34 [2021-08-25 16:15:38,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:38,178 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2021-08-25 16:15:38,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:38,178 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2021-08-25 16:15:38,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-25 16:15:38,179 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:38,180 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:38,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:38,392 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,SelfDestructingSolverStorable6 [2021-08-25 16:15:38,393 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 772319464, now seen corresponding path program 2 times [2021-08-25 16:15:38,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:38,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460349330] [2021-08-25 16:15:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:38,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:38,410 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:38,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [16141128] [2021-08-25 16:15:38,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:15:38,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:38,418 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:38,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 16:15:38,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:15:38,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:38,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:15:38,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-25 16:15:38,661 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:38,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460349330] [2021-08-25 16:15:38,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:38,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [16141128] [2021-08-25 16:15:38,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [16141128] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:38,665 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:38,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:15:38,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973493758] [2021-08-25 16:15:38,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:15:38,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:15:38,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:38,667 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:38,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:38,734 INFO L93 Difference]: Finished difference Result 154 states and 210 transitions. [2021-08-25 16:15:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:15:38,735 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 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 [2021-08-25 16:15:38,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:38,738 INFO L225 Difference]: With dead ends: 154 [2021-08-25 16:15:38,739 INFO L226 Difference]: Without dead ends: 94 [2021-08-25 16:15:38,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:38,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-25 16:15:38,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 89. [2021-08-25 16:15:38,754 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) [2021-08-25 16:15:38,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2021-08-25 16:15:38,756 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 36 [2021-08-25 16:15:38,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:38,758 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2021-08-25 16:15:38,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:38,758 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2021-08-25 16:15:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-25 16:15:38,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:38,760 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:38,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:38,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:38,969 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:38,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1297182544, now seen corresponding path program 3 times [2021-08-25 16:15:38,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:38,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940275422] [2021-08-25 16:15:38,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:38,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:38,986 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:38,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131447962] [2021-08-25 16:15:38,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:15:38,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:38,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:38,987 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:39,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 16:15:39,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 16:15:39,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:39,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:15:39,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:39,425 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-08-25 16:15:39,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:39,425 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940275422] [2021-08-25 16:15:39,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:39,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131447962] [2021-08-25 16:15:39,426 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131447962] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:39,426 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:39,426 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-25 16:15:39,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677135637] [2021-08-25 16:15:39,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:15:39,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:39,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:15:39,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:15:39,427 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:39,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:39,549 INFO L93 Difference]: Finished difference Result 209 states and 271 transitions. [2021-08-25 16:15:39,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:15:39,549 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 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 45 [2021-08-25 16:15:39,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:39,550 INFO L225 Difference]: With dead ends: 209 [2021-08-25 16:15:39,550 INFO L226 Difference]: Without dead ends: 138 [2021-08-25 16:15:39,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:15:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-25 16:15:39,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 116. [2021-08-25 16:15:39,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.2695652173913043) internal successors, (146), 115 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:39,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 146 transitions. [2021-08-25 16:15:39,556 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 146 transitions. Word has length 45 [2021-08-25 16:15:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:39,557 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 146 transitions. [2021-08-25 16:15:39,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 146 transitions. [2021-08-25 16:15:39,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-25 16:15:39,558 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:39,558 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:39,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:39,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:39,768 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:39,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:39,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1574802954, now seen corresponding path program 1 times [2021-08-25 16:15:39,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:39,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718599666] [2021-08-25 16:15:39,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:39,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:39,777 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:39,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32899762] [2021-08-25 16:15:39,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:39,778 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:39,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:39,779 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:39,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 16:15:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:39,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:15:39,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:40,033 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-25 16:15:40,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:40,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718599666] [2021-08-25 16:15:40,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:40,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32899762] [2021-08-25 16:15:40,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32899762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:40,034 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:40,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 16:15:40,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373039275] [2021-08-25 16:15:40,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 16:15:40,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:40,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 16:15:40,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:15:40,035 INFO L87 Difference]: Start difference. First operand 116 states and 146 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:40,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:40,119 INFO L93 Difference]: Finished difference Result 229 states and 289 transitions. [2021-08-25 16:15:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 16:15:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-25 16:15:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:40,121 INFO L225 Difference]: With dead ends: 229 [2021-08-25 16:15:40,121 INFO L226 Difference]: Without dead ends: 119 [2021-08-25 16:15:40,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:15:40,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-25 16:15:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2021-08-25 16:15:40,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.264957264957265) internal successors, (148), 117 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 148 transitions. [2021-08-25 16:15:40,126 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 148 transitions. Word has length 45 [2021-08-25 16:15:40,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:40,126 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 148 transitions. [2021-08-25 16:15:40,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:40,126 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 148 transitions. [2021-08-25 16:15:40,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-25 16:15:40,127 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:40,127 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:40,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:40,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-25 16:15:40,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1426428756, now seen corresponding path program 2 times [2021-08-25 16:15:40,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:40,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205536137] [2021-08-25 16:15:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:40,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:40,345 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:40,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [986851423] [2021-08-25 16:15:40,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:15:40,345 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:40,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:40,346 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:40,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 16:15:40,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:15:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:40,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-25 16:15:40,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-08-25 16:15:40,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:40,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205536137] [2021-08-25 16:15:40,639 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:40,639 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986851423] [2021-08-25 16:15:40,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986851423] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:40,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:40,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-08-25 16:15:40,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616287611] [2021-08-25 16:15:40,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-25 16:15:40,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:40,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-25 16:15:40,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-08-25 16:15:40,641 INFO L87 Difference]: Start difference. First operand 118 states and 148 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:40,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:40,765 INFO L93 Difference]: Finished difference Result 171 states and 211 transitions. [2021-08-25 16:15:40,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-25 16:15:40,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-25 16:15:40,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:40,767 INFO L225 Difference]: With dead ends: 171 [2021-08-25 16:15:40,767 INFO L226 Difference]: Without dead ends: 153 [2021-08-25 16:15:40,767 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 55.9ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-08-25 16:15:40,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-25 16:15:40,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 128. [2021-08-25 16:15:40,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.2440944881889764) internal successors, (158), 127 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2021-08-25 16:15:40,773 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 47 [2021-08-25 16:15:40,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:40,774 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2021-08-25 16:15:40,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:40,775 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2021-08-25 16:15:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-25 16:15:40,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:40,776 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:40,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:40,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:40,989 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash 185085973, now seen corresponding path program 1 times [2021-08-25 16:15:40,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:40,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476227002] [2021-08-25 16:15:40,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:40,990 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:40,997 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:40,999 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1697547643] [2021-08-25 16:15:40,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:40,999 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:40,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:41,000 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:41,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 16:15:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:41,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-25 16:15:41,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 16:15:41,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:41,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476227002] [2021-08-25 16:15:41,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:41,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697547643] [2021-08-25 16:15:41,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697547643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:41,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:41,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-08-25 16:15:41,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814886279] [2021-08-25 16:15:41,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:15:41,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:41,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:15:41,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-25 16:15:41,354 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:41,429 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2021-08-25 16:15:41,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:15:41,429 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 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 53 [2021-08-25 16:15:41,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:41,430 INFO L225 Difference]: With dead ends: 181 [2021-08-25 16:15:41,430 INFO L226 Difference]: Without dead ends: 137 [2021-08-25 16:15:41,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 34.6ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:15:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-25 16:15:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2021-08-25 16:15:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2330827067669172) internal successors, (164), 133 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 164 transitions. [2021-08-25 16:15:41,436 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 164 transitions. Word has length 53 [2021-08-25 16:15:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:41,436 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 164 transitions. [2021-08-25 16:15:41,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 164 transitions. [2021-08-25 16:15:41,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-25 16:15:41,437 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:41,437 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:41,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:41,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:41,645 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:41,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:41,645 INFO L82 PathProgramCache]: Analyzing trace with hash -100779465, now seen corresponding path program 2 times [2021-08-25 16:15:41,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:41,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637137795] [2021-08-25 16:15:41,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:41,646 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:41,652 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:41,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330344673] [2021-08-25 16:15:41,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:15:41,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:41,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:41,654 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:41,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 16:15:41,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:15:41,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:41,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-25 16:15:41,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-08-25 16:15:42,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:42,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637137795] [2021-08-25 16:15:42,177 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:42,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330344673] [2021-08-25 16:15:42,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330344673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:42,177 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:42,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-25 16:15:42,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413902870] [2021-08-25 16:15:42,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-25 16:15:42,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:42,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-25 16:15:42,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:15:42,178 INFO L87 Difference]: Start difference. First operand 134 states and 164 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:42,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:42,352 INFO L93 Difference]: Finished difference Result 336 states and 416 transitions. [2021-08-25 16:15:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-25 16:15:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 55 [2021-08-25 16:15:42,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:42,353 INFO L225 Difference]: With dead ends: 336 [2021-08-25 16:15:42,353 INFO L226 Difference]: Without dead ends: 218 [2021-08-25 16:15:42,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-08-25 16:15:42,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-25 16:15:42,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 206. [2021-08-25 16:15:42,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.2048780487804878) internal successors, (247), 205 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 247 transitions. [2021-08-25 16:15:42,361 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 247 transitions. Word has length 55 [2021-08-25 16:15:42,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:42,361 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 247 transitions. [2021-08-25 16:15:42,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-25 16:15:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 247 transitions. [2021-08-25 16:15:42,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-25 16:15:42,362 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:42,362 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:42,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:42,576 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,SelfDestructingSolverStorable12 [2021-08-25 16:15:42,577 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:42,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:42,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1875846409, now seen corresponding path program 1 times [2021-08-25 16:15:42,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:42,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081217767] [2021-08-25 16:15:42,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:42,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:42,585 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:42,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [382700071] [2021-08-25 16:15:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:42,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:42,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:42,586 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:42,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 16:15:42,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 16:15:42,780 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 16:15:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 16:15:42,963 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 16:15:42,963 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 16:15:42,964 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 16:15:42,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:43,180 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,SelfDestructingSolverStorable13 [2021-08-25 16:15:43,185 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 16:15:43,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 04:15:43 BoogieIcfgContainer [2021-08-25 16:15:43,246 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 16:15:43,247 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 16:15:43,247 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 16:15:43,247 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 16:15:43,248 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:36" (3/4) ... [2021-08-25 16:15:43,249 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 16:15:43,316 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 16:15:43,316 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 16:15:43,317 INFO L168 Benchmark]: Toolchain (without parser) took 7601.93 ms. Allocated memory was 69.2 MB in the beginning and 130.0 MB in the end (delta: 60.8 MB). Free memory was 49.2 MB in the beginning and 90.1 MB in the end (delta: -40.9 MB). Peak memory consumption was 19.2 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:43,317 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 50.1 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:15:43,318 INFO L168 Benchmark]: CACSL2BoogieTranslator took 186.98 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 52.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:43,318 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.72 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 49.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:43,318 INFO L168 Benchmark]: Boogie Preprocessor took 40.94 ms. Allocated memory is still 69.2 MB. Free memory was 49.8 MB in the beginning and 48.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:15:43,319 INFO L168 Benchmark]: RCFGBuilder took 382.54 ms. Allocated memory is still 69.2 MB. Free memory was 48.2 MB in the beginning and 47.4 MB in the end (delta: 793.5 kB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:43,319 INFO L168 Benchmark]: TraceAbstraction took 6858.89 ms. Allocated memory was 69.2 MB in the beginning and 130.0 MB in the end (delta: 60.8 MB). Free memory was 47.1 MB in the beginning and 95.4 MB in the end (delta: -48.3 MB). Peak memory consumption was 77.3 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:43,319 INFO L168 Benchmark]: Witness Printer took 68.92 ms. Allocated memory is still 130.0 MB. Free memory was 95.4 MB in the beginning and 90.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:43,320 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 69.2 MB. Free memory was 50.2 MB in the beginning and 50.1 MB in the end (delta: 84.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 186.98 ms. Allocated memory is still 69.2 MB. Free memory was 48.8 MB in the beginning and 52.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 11.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.72 ms. Allocated memory is still 69.2 MB. Free memory was 52.0 MB in the beginning and 49.8 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.94 ms. Allocated memory is still 69.2 MB. Free memory was 49.8 MB in the beginning and 48.5 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 382.54 ms. Allocated memory is still 69.2 MB. Free memory was 48.2 MB in the beginning and 47.4 MB in the end (delta: 793.5 kB). Peak memory consumption was 20.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6858.89 ms. Allocated memory was 69.2 MB in the beginning and 130.0 MB in the end (delta: 60.8 MB). Free memory was 47.1 MB in the beginning and 95.4 MB in the end (delta: -48.3 MB). Peak memory consumption was 77.3 MB. Max. memory is 16.1 GB. * Witness Printer took 68.92 ms. Allocated memory is still 130.0 MB. Free memory was 95.4 MB in the beginning and 90.1 MB in the end (delta: 5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 64]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L15] int N; VAL [N=0] [L43] N = __VERIFIER_nondet_int() [L44] COND TRUE N > 1 [L45] int x[N]; [L17] int i; [L18] i = 0 VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND TRUE i < N [L19] x[i] = __VERIFIER_nondet_int() [L18] i++ VAL [N=3] [L18] COND FALSE !(i < N) VAL [N=3] [L47] int temp; [L48] int ret; [L49] int ret2; [L50] int ret5; [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L52] ret = rangesum(x) [L54] EXPR x[0] [L54] temp=x[0] [L54] EXPR x[1] [L54] x[0] = x[1] [L54] x[1] = temp [L25] int i; [L26] long long ret; [L27] ret = 0 [L28] int cnt = 0; [L29] i = 0 VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L55] ret2 = rangesum(x) [L56] EXPR x[0] [L56] temp=x[0] [L57] int i =0 ; VAL [N=3] [L57] COND TRUE i N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND FALSE !(i > N/2) VAL [N=3] [L29] i++ VAL [N=3] [L29] COND TRUE i < N VAL [N=3] [L30] COND TRUE i > N/2 [L31] EXPR x[i] [L31] ret = ret + x[i] [L32] cnt = cnt + 1 VAL [N=3] [L29] i++ VAL [N=3] [L29] COND FALSE !(i < N) VAL [N=3] [L35] COND TRUE cnt !=0 [L36] return ret / cnt; VAL [N=3] [L61] ret5 = rangesum(x) [L63] COND TRUE ret != ret2 || ret !=ret5 VAL [N=3] [L64] reach_error() VAL [N=3] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6746.6ms, OverallIterations: 14, TraceHistogramMax: 3, EmptinessCheckTime: 22.4ms, AutomataDifference: 1118.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 337 SDtfs, 573 SDslu, 457 SDs, 0 SdLazy, 854 SolverSat, 135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 590.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 363 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 357.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=13, InterpolantAutomatonStates: 77, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 114.0ms AutomataMinimizationTime, 13 MinimizatonAttempts, 119 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 127.2ms SsaConstructionTime, 316.3ms SatisfiabilityAnalysisTime, 1870.1ms InterpolantComputationTime, 504 NumberOfCodeBlocks, 501 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 436 ConstructedInterpolants, 0 QuantifiedInterpolants, 1349 SizeOfPredicates, 19 NumberOfNonLiveVariables, 1384 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 13 InterpolantComputations, 7 PerfectInterpolantSequences, 181/212 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-25 16:15:43,355 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...