./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/s3iff.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-fpi/s3iff.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d0f1e455156ee86cfb94207e1fcb3202634fcf0 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Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 02:33:10,507 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 02:33:10,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 02:33:10,539 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 02:33:10,539 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 02:33:10,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 02:33:10,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 02:33:10,547 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 02:33:10,549 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 02:33:10,552 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 02:33:10,553 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 02:33:10,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 02:33:10,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 02:33:10,563 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 02:33:10,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 02:33:10,569 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 02:33:10,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 02:33:10,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 02:33:10,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 02:33:10,576 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 02:33:10,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 02:33:10,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 02:33:10,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 02:33:10,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 02:33:10,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 02:33:10,585 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 02:33:10,586 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 02:33:10,587 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 02:33:10,587 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 02:33:10,588 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 02:33:10,588 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 02:33:10,589 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 02:33:10,590 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 02:33:10,590 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 02:33:10,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 02:33:10,592 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 02:33:10,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 02:33:10,592 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 02:33:10,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 02:33:10,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 02:33:10,594 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 02:33:10,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 02:33:10,626 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 02:33:10,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 02:33:10,627 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 02:33:10,627 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 02:33:10,628 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 02:33:10,628 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 02:33:10,629 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 02:33:10,629 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 02:33:10,629 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 02:33:10,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 02:33:10,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 02:33:10,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 02:33:10,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 02:33:10,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 02:33:10,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 02:33:10,631 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 02:33:10,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 02:33:10,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 02:33:10,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 02:33:10,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 02:33:10,631 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 02:33:10,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 02:33:10,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 02:33:10,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 02:33:10,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 02:33:10,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 02:33:10,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 02:33:10,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 02:33:10,633 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 02:33:10,633 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 02:33:10,633 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d0f1e455156ee86cfb94207e1fcb3202634fcf0 [2021-08-29 02:33:10,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 02:33:10,901 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 02:33:10,903 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 02:33:10,904 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 02:33:10,905 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 02:33:10,906 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/s3iff.c [2021-08-29 02:33:10,949 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b893c7e56/639113f8723c4dc9a571d44ddad8e73c/FLAG1f4ef9e8f [2021-08-29 02:33:11,289 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 02:33:11,289 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/s3iff.c [2021-08-29 02:33:11,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b893c7e56/639113f8723c4dc9a571d44ddad8e73c/FLAG1f4ef9e8f [2021-08-29 02:33:11,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b893c7e56/639113f8723c4dc9a571d44ddad8e73c [2021-08-29 02:33:11,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 02:33:11,313 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 02:33:11,316 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 02:33:11,316 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 02:33:11,318 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 02:33:11,319 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40a79377 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11, skipping insertion in model container [2021-08-29 02:33:11,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 02:33:11,334 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 02:33:11,469 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/array-fpi/s3iff.c[588,601] [2021-08-29 02:33:11,483 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 02:33:11,488 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 02:33:11,531 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/array-fpi/s3iff.c[588,601] [2021-08-29 02:33:11,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 02:33:11,554 INFO L208 MainTranslator]: Completed translation [2021-08-29 02:33:11,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11 WrapperNode [2021-08-29 02:33:11,556 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 02:33:11,557 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 02:33:11,557 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 02:33:11,557 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 02:33:11,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,571 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 02:33:11,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 02:33:11,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 02:33:11,588 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 02:33:11,593 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,597 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,597 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,615 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 02:33:11,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 02:33:11,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 02:33:11,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 02:33:11,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (1/1) ... [2021-08-29 02:33:11,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 02:33:11,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:33:11,675 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) [2021-08-29 02:33:11,734 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 [2021-08-29 02:33:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 02:33:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 02:33:11,756 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 02:33:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 02:33:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 02:33:11,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 02:33:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 02:33:11,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 02:33:11,939 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 02:33:11,939 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-08-29 02:33:11,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:33:11 BoogieIcfgContainer [2021-08-29 02:33:11,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 02:33:11,941 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 02:33:11,941 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 02:33:11,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 02:33:11,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 02:33:11" (1/3) ... [2021-08-29 02:33:11,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6427612f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:33:11, skipping insertion in model container [2021-08-29 02:33:11,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 02:33:11" (2/3) ... [2021-08-29 02:33:11,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6427612f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 02:33:11, skipping insertion in model container [2021-08-29 02:33:11,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:33:11" (3/3) ... [2021-08-29 02:33:11,945 INFO L111 eAbstractionObserver]: Analyzing ICFG s3iff.c [2021-08-29 02:33:11,948 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 02:33:11,948 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 02:33:11,984 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 02:33:11,991 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 [2021-08-29 02:33:11,991 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 02:33:12,004 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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) [2021-08-29 02:33:12,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 02:33:12,009 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:33:12,009 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:33:12,009 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:33:12,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:33:12,013 INFO L82 PathProgramCache]: Analyzing trace with hash 356661439, now seen corresponding path program 1 times [2021-08-29 02:33:12,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:33:12,019 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204434976] [2021-08-29 02:33:12,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:12,019 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:33:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:33:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:12,119 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:33:12,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204434976] [2021-08-29 02:33:12,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204434976] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 02:33:12,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:33:12,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 02:33:12,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919002946] [2021-08-29 02:33:12,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 02:33:12,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:33:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 02:33:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 02:33:12,141 INFO L87 Difference]: Start difference. First operand has 19 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-08-29 02:33:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:33:12,198 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2021-08-29 02:33:12,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 02:33:12,201 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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 11 [2021-08-29 02:33:12,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:33:12,205 INFO L225 Difference]: With dead ends: 34 [2021-08-29 02:33:12,205 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 02:33:12,207 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 02:33:12,210 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.32ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.94ms IncrementalHoareTripleChecker+Time [2021-08-29 02:33:12,211 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.32ms Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 44.94ms Time] [2021-08-29 02:33:12,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 02:33:12,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 02:33:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:33:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-08-29 02:33:12,243 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 11 [2021-08-29 02:33:12,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:33:12,244 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-08-29 02:33:12,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2021-08-29 02:33:12,244 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-08-29 02:33:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 02:33:12,245 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:33:12,245 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:33:12,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 02:33:12,246 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:33:12,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:33:12,248 INFO L82 PathProgramCache]: Analyzing trace with hash -452685187, now seen corresponding path program 1 times [2021-08-29 02:33:12,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:33:12,248 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903463852] [2021-08-29 02:33:12,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:12,248 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:33:12,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:33:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:12,325 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:33:12,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903463852] [2021-08-29 02:33:12,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903463852] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 02:33:12,326 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 02:33:12,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 02:33:12,326 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129585418] [2021-08-29 02:33:12,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 02:33:12,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:33:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 02:33:12,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 02:33:12,328 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-08-29 02:33:12,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:33:12,371 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-08-29 02:33:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 02:33:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 11 [2021-08-29 02:33:12,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:33:12,372 INFO L225 Difference]: With dead ends: 28 [2021-08-29 02:33:12,373 INFO L226 Difference]: Without dead ends: 20 [2021-08-29 02:33:12,376 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.31ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 02:33:12,377 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.27ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.18ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.08ms IncrementalHoareTripleChecker+Time [2021-08-29 02:33:12,378 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 0 Invalid, 36 Unknown, 0 Unchecked, 1.18ms Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 32.08ms Time] [2021-08-29 02:33:12,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-29 02:33:12,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-08-29 02:33:12,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:33:12,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-08-29 02:33:12,387 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2021-08-29 02:33:12,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:33:12,388 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-08-29 02:33:12,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-08-29 02:33:12,389 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-08-29 02:33:12,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 02:33:12,390 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:33:12,390 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:33:12,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 02:33:12,390 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:33:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:33:12,392 INFO L82 PathProgramCache]: Analyzing trace with hash 623611495, now seen corresponding path program 1 times [2021-08-29 02:33:12,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:33:12,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546272064] [2021-08-29 02:33:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:12,395 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:33:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:33:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:12,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:33:12,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546272064] [2021-08-29 02:33:12,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546272064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:33:12,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075248925] [2021-08-29 02:33:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:12,745 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:33:12,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:33:12,747 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) [2021-08-29 02:33:12,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 02:33:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:33:12,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-29 02:33:12,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:33:12,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-29 02:33:12,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-08-29 02:33:12,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-29 02:33:13,101 INFO L354 Elim1Store]: treesize reduction 124, result has 15.6 percent of original size [2021-08-29 02:33:13,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 53 [2021-08-29 02:33:13,353 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-08-29 02:33:13,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 86 treesize of output 50 [2021-08-29 02:33:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:13,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:33:15,105 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 02:33:15,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 114 [2021-08-29 02:33:15,112 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 02:33:15,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 106 [2021-08-29 02:33:15,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 172 treesize of output 154 [2021-08-29 02:33:15,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 120 [2021-08-29 02:33:15,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 73 [2021-08-29 02:33:15,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:15,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075248925] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:33:15,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:33:15,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2021-08-29 02:33:15,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728713117] [2021-08-29 02:33:15,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-29 02:33:15,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:33:15,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-29 02:33:15,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=365, Unknown=2, NotChecked=0, Total=462 [2021-08-29 02:33:15,159 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:33:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:33:15,207 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2021-08-29 02:33:15,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 02:33:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-29 02:33:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:33:15,208 INFO L225 Difference]: With dead ends: 28 [2021-08-29 02:33:15,208 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 02:33:15,209 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1837.38ms TimeCoverageRelationStatistics Valid=106, Invalid=398, Unknown=2, NotChecked=0, Total=506 [2021-08-29 02:33:15,209 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 23.08ms IncrementalHoareTripleChecker+Time [2021-08-29 02:33:15,210 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 102 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 54 Unchecked, 23.08ms Time] [2021-08-29 02:33:15,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 02:33:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-08-29 02:33:15,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 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) [2021-08-29 02:33:15,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-08-29 02:33:15,213 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-08-29 02:33:15,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:33:15,213 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-08-29 02:33:15,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 22 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:33:15,213 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-08-29 02:33:15,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 02:33:15,214 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:33:15,214 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:33:15,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 02:33:15,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:33:15,447 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:33:15,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:33:15,447 INFO L82 PathProgramCache]: Analyzing trace with hash 680869797, now seen corresponding path program 1 times [2021-08-29 02:33:15,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:33:15,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235748467] [2021-08-29 02:33:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:15,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:33:15,456 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 02:33:15,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [679274664] [2021-08-29 02:33:15,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:15,457 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:33:15,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:33:15,458 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) [2021-08-29 02:33:15,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 02:33:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:33:15,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-29 02:33:15,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:33:15,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-29 02:33:15,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-29 02:33:15,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:15,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:33:15,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-08-29 02:33:15,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-08-29 02:33:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:15,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:33:15,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235748467] [2021-08-29 02:33:15,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-29 02:33:15,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679274664] [2021-08-29 02:33:15,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679274664] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:33:15,598 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-29 02:33:15,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-08-29 02:33:15,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440011564] [2021-08-29 02:33:15,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-29 02:33:15,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:33:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-29 02:33:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-08-29 02:33:15,599 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-08-29 02:33:15,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:33:15,661 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-08-29 02:33:15,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 02:33:15,661 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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 16 [2021-08-29 02:33:15,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:33:15,662 INFO L225 Difference]: With dead ends: 33 [2021-08-29 02:33:15,662 INFO L226 Difference]: Without dead ends: 26 [2021-08-29 02:33:15,662 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.08ms TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-29 02:33:15,663 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.69ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.03ms IncrementalHoareTripleChecker+Time [2021-08-29 02:33:15,663 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 0 Invalid, 113 Unknown, 0 Unchecked, 0.69ms Time], IncrementalHoareTripleChecker [6 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 45.03ms Time] [2021-08-29 02:33:15,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-29 02:33:15,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-08-29 02:33:15,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:33:15,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-08-29 02:33:15,666 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 16 [2021-08-29 02:33:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:33:15,666 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-08-29 02:33:15,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 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) [2021-08-29 02:33:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-08-29 02:33:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 02:33:15,667 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:33:15,667 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:33:15,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 02:33:15,873 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,SelfDestructingSolverStorable3 [2021-08-29 02:33:15,873 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:33:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:33:15,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1137819675, now seen corresponding path program 2 times [2021-08-29 02:33:15,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:33:15,874 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279386997] [2021-08-29 02:33:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:15,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:33:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:33:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:15,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:33:15,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279386997] [2021-08-29 02:33:15,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279386997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:33:15,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843026979] [2021-08-29 02:33:15,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 02:33:15,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:33:15,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:33:15,926 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) [2021-08-29 02:33:15,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 02:33:15,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 02:33:15,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:33:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 02:33:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:33:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:16,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:33:16,051 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:16,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843026979] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:33:16,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:33:16,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-08-29 02:33:16,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719630762] [2021-08-29 02:33:16,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 02:33:16,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:33:16,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 02:33:16,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-29 02:33:16,053 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:33:16,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:33:16,154 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2021-08-29 02:33:16,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 02:33:16,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 02:33:16,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:33:16,155 INFO L225 Difference]: With dead ends: 33 [2021-08-29 02:33:16,155 INFO L226 Difference]: Without dead ends: 29 [2021-08-29 02:33:16,156 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 61.39ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-08-29 02:33:16,156 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.36ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 70.25ms IncrementalHoareTripleChecker+Time [2021-08-29 02:33:16,156 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 0 Invalid, 169 Unknown, 0 Unchecked, 1.36ms Time], IncrementalHoareTripleChecker [16 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 70.25ms Time] [2021-08-29 02:33:16,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-29 02:33:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-08-29 02:33:16,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2021-08-29 02:33:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-29 02:33:16,159 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 18 [2021-08-29 02:33:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:33:16,160 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-29 02:33:16,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 02:33:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-29 02:33:16,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-29 02:33:16,160 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:33:16,160 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:33:16,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 02:33:16,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:33:16,378 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:33:16,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:33:16,378 INFO L82 PathProgramCache]: Analyzing trace with hash -479454913, now seen corresponding path program 3 times [2021-08-29 02:33:16,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:33:16,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855615346] [2021-08-29 02:33:16,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:16,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:33:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 02:33:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:16,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 02:33:16,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855615346] [2021-08-29 02:33:16,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855615346] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 02:33:16,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996904713] [2021-08-29 02:33:16,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 02:33:16,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:33:16,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 02:33:16,418 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) [2021-08-29 02:33:16,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 02:33:16,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-29 02:33:16,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 02:33:16,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 02:33:16,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 02:33:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:16,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 02:33:16,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 02:33:16,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996904713] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 02:33:16,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 02:33:16,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-08-29 02:33:16,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466239950] [2021-08-29 02:33:16,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 02:33:16,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 02:33:16,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 02:33:16,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-29 02:33:16,553 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-08-29 02:33:16,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 02:33:16,628 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2021-08-29 02:33:16,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 02:33:16,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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 19 [2021-08-29 02:33:16,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 02:33:16,629 INFO L225 Difference]: With dead ends: 37 [2021-08-29 02:33:16,629 INFO L226 Difference]: Without dead ends: 25 [2021-08-29 02:33:16,630 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 45.12ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-29 02:33:16,630 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 16 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.72ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.99ms IncrementalHoareTripleChecker+Time [2021-08-29 02:33:16,630 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 0 Invalid, 121 Unknown, 0 Unchecked, 0.72ms Time], IncrementalHoareTripleChecker [10 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 55.99ms Time] [2021-08-29 02:33:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-29 02:33:16,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-08-29 02:33:16,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 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) [2021-08-29 02:33:16,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-29 02:33:16,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-08-29 02:33:16,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 02:33:16,634 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-29 02:33:16,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 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) [2021-08-29 02:33:16,634 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-29 02:33:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 02:33:16,634 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 02:33:16,634 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 02:33:16,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 02:33:16,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 02:33:16,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 02:33:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 02:33:16,852 INFO L82 PathProgramCache]: Analyzing trace with hash 634982145, now seen corresponding path program 4 times [2021-08-29 02:33:16,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 02:33:16,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046397309] [2021-08-29 02:33:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 02:33:16,853 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 02:33:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 02:33:16,865 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 02:33:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 02:33:16,887 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 02:33:16,887 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 02:33:16,888 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 02:33:16,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-29 02:33:16,892 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 02:33:16,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 02:33:16 BoogieIcfgContainer [2021-08-29 02:33:16,912 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 02:33:16,912 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 02:33:16,912 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 02:33:16,913 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 02:33:16,913 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 02:33:11" (3/4) ... [2021-08-29 02:33:16,914 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 02:33:16,939 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 02:33:16,939 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 02:33:16,940 INFO L158 Benchmark]: Toolchain (without parser) took 5626.70ms. Allocated memory was 48.2MB in the beginning and 100.7MB in the end (delta: 52.4MB). Free memory was 26.0MB in the beginning and 52.7MB in the end (delta: -26.7MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2021-08-29 02:33:16,940 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.6MB in the beginning and 30.5MB in the end (delta: 33.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 02:33:16,940 INFO L158 Benchmark]: CACSL2BoogieTranslator took 240.49ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 25.8MB in the beginning and 44.6MB in the end (delta: -18.8MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-08-29 02:33:16,940 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.91ms. Allocated memory is still 60.8MB. Free memory was 44.6MB in the beginning and 43.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 02:33:16,941 INFO L158 Benchmark]: Boogie Preprocessor took 34.84ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 41.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 02:33:16,941 INFO L158 Benchmark]: RCFGBuilder took 317.02ms. Allocated memory is still 60.8MB. Free memory was 41.7MB in the beginning and 32.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 02:33:16,941 INFO L158 Benchmark]: TraceAbstraction took 4970.70ms. Allocated memory was 60.8MB in the beginning and 100.7MB in the end (delta: 39.8MB). Free memory was 32.0MB in the beginning and 56.0MB in the end (delta: -24.0MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2021-08-29 02:33:16,941 INFO L158 Benchmark]: Witness Printer took 27.07ms. Allocated memory is still 100.7MB. Free memory was 56.0MB in the beginning and 52.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-08-29 02:33:16,943 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 48.2MB. Free memory was 30.6MB in the beginning and 30.5MB in the end (delta: 33.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 240.49ms. Allocated memory was 48.2MB in the beginning and 60.8MB in the end (delta: 12.6MB). Free memory was 25.8MB in the beginning and 44.6MB in the end (delta: -18.8MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.91ms. Allocated memory is still 60.8MB. Free memory was 44.6MB in the beginning and 43.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.84ms. Allocated memory is still 60.8MB. Free memory was 43.1MB in the beginning and 41.9MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 317.02ms. Allocated memory is still 60.8MB. Free memory was 41.7MB in the beginning and 32.5MB in the end (delta: 9.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 4970.70ms. Allocated memory was 60.8MB in the beginning and 100.7MB in the end (delta: 39.8MB). Free memory was 32.0MB in the beginning and 56.0MB in the end (delta: -24.0MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. * Witness Printer took 27.07ms. Allocated memory is still 100.7MB. Free memory was 56.0MB in the beginning and 52.7MB in the end (delta: 3.3MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; VAL [N=0] [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L13] COND FALSE !(!cond) VAL [N=2] [L27] int i; [L28] long long sum[1]; [L29] int *a = malloc(sizeof(int)*N); [L31] sum[0] = 1 [L32] i=0 VAL [N=2] [L32] COND TRUE i