./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/sumt5.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/loops-crafted-1/sumt5.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 b94a62921af11a29f5633c814830ac552a0eedfb ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 11:37:20,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:37:20,555 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:37:20,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:37:20,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:37:20,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:37:20,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:37:20,583 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:37:20,584 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:37:20,585 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:37:20,586 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:37:20,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:37:20,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:37:20,588 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:37:20,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:37:20,590 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:37:20,591 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:37:20,592 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:37:20,593 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:37:20,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:37:20,596 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:37:20,599 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:37:20,599 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:37:20,600 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:37:20,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:37:20,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:37:20,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:37:20,603 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:37:20,604 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:37:20,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:37:20,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:37:20,605 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:37:20,606 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:37:20,606 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:37:20,607 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:37:20,607 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:37:20,608 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:37:20,608 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:37:20,609 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:37:20,609 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:37:20,610 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:37:20,614 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:37:20,643 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:37:20,643 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:37:20,644 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:37:20,644 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:37:20,646 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:37:20,646 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:37:20,646 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:37:20,647 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:37:20,647 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:37:20,647 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:37:20,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:37:20,648 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:37:20,648 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:37:20,648 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:37:20,648 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:37:20,649 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:37:20,649 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:37:20,649 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:37:20,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:37:20,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:37:20,650 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:37:20,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:37:20,659 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:37:20,659 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:37:20,659 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:37:20,659 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:37:20,659 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:37:20,660 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:37:20,660 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:37:20,660 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:37:20,660 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b94a62921af11a29f5633c814830ac552a0eedfb [2021-08-29 11:37:20,967 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:37:20,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:37:20,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:37:20,989 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:37:20,989 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:37:20,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/sumt5.c [2021-08-29 11:37:21,045 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b32a47a7/b8633627954143eeb1aa5247cea8c416/FLAG6cec4a722 [2021-08-29 11:37:21,525 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:37:21,525 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/sumt5.c [2021-08-29 11:37:21,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b32a47a7/b8633627954143eeb1aa5247cea8c416/FLAG6cec4a722 [2021-08-29 11:37:21,542 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0b32a47a7/b8633627954143eeb1aa5247cea8c416 [2021-08-29 11:37:21,544 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:37:21,546 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:37:21,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:37:21,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:37:21,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:37:21,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d756186 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21, skipping insertion in model container [2021-08-29 11:37:21,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,558 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:37:21,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:37:21,665 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/loops-crafted-1/sumt5.c[403,416] [2021-08-29 11:37:21,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:37:21,683 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:37:21,693 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/loops-crafted-1/sumt5.c[403,416] [2021-08-29 11:37:21,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:37:21,710 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:37:21,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21 WrapperNode [2021-08-29 11:37:21,711 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:37:21,712 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:37:21,712 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:37:21,712 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:37:21,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:37:21,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:37:21,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:37:21,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:37:21,755 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,755 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,757 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,759 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,763 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,765 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:37:21,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:37:21,766 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:37:21,766 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:37:21,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (1/1) ... [2021-08-29 11:37:21,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:37:21,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:37:21,793 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 11:37:21,800 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 11:37:21,826 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:37:21,827 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:37:21,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:37:21,829 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:37:21,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:37:21,943 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 11:37:21,944 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:37:21 BoogieIcfgContainer [2021-08-29 11:37:21,944 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:37:21,946 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:37:21,946 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:37:21,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:37:21,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:37:21" (1/3) ... [2021-08-29 11:37:21,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78106f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:37:21, skipping insertion in model container [2021-08-29 11:37:21,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:37:21" (2/3) ... [2021-08-29 11:37:21,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78106f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:37:21, skipping insertion in model container [2021-08-29 11:37:21,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:37:21" (3/3) ... [2021-08-29 11:37:21,951 INFO L111 eAbstractionObserver]: Analyzing ICFG sumt5.c [2021-08-29 11:37:21,955 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:37:21,955 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 11:37:21,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:37:22,004 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 11:37:22,004 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 11:37:22,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 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 11:37:22,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 11:37:22,019 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:37:22,019 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:37:22,020 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:37:22,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:37:22,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1807766728, now seen corresponding path program 1 times [2021-08-29 11:37:22,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:37:22,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565994444] [2021-08-29 11:37:22,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:22,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:37:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:22,181 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 11:37:22,182 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:37:22,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565994444] [2021-08-29 11:37:22,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565994444] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:37:22,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:37:22,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 11:37:22,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65904299] [2021-08-29 11:37:22,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 11:37:22,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:37:22,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 11:37:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:37:22,222 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6) internal successors, (24), 16 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 11:37:24,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:26,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:26,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:37:26,631 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-08-29 11:37:26,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 11:37:26,634 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-08-29 11:37:26,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:37:26,640 INFO L225 Difference]: With dead ends: 25 [2021-08-29 11:37:26,640 INFO L226 Difference]: Without dead ends: 13 [2021-08-29 11:37:26,642 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:37:26,645 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4065.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.31ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4394.21ms IncrementalHoareTripleChecker+Time [2021-08-29 11:37:26,645 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.31ms Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 4394.21ms Time] [2021-08-29 11:37:26,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-29 11:37:26,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-29 11:37:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 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 11:37:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2021-08-29 11:37:26,669 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 7 [2021-08-29 11:37:26,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:37:26,670 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2021-08-29 11:37:26,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 11:37:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2021-08-29 11:37:26,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 11:37:26,671 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:37:26,671 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:37:26,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 11:37:26,671 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:37:26,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:37:26,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1806992162, now seen corresponding path program 1 times [2021-08-29 11:37:26,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:37:26,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268500102] [2021-08-29 11:37:26,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:26,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:37:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:26,926 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 11:37:26,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:37:26,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268500102] [2021-08-29 11:37:26,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268500102] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:37:26,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:37:26,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 11:37:26,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99736092] [2021-08-29 11:37:26,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 11:37:26,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:37:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 11:37:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:37:26,932 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 11:37:28,962 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:31,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:31,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:37:31,416 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2021-08-29 11:37:31,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 11:37:31,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-08-29 11:37:31,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:37:31,417 INFO L225 Difference]: With dead ends: 19 [2021-08-29 11:37:31,417 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 11:37:31,417 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.44ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-29 11:37:31,418 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4076.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.90ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4450.44ms IncrementalHoareTripleChecker+Time [2021-08-29 11:37:31,419 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 45 Unknown, 0 Unchecked, 0.90ms Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 2 Unknown, 0 Unchecked, 4450.44ms Time] [2021-08-29 11:37:31,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 11:37:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-29 11:37:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 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) [2021-08-29 11:37:31,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 18 transitions. [2021-08-29 11:37:31,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 18 transitions. Word has length 7 [2021-08-29 11:37:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:37:31,423 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 18 transitions. [2021-08-29 11:37:31,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 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 11:37:31,423 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 18 transitions. [2021-08-29 11:37:31,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 11:37:31,423 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:37:31,424 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:37:31,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 11:37:31,424 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:37:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:37:31,425 INFO L82 PathProgramCache]: Analyzing trace with hash 92541021, now seen corresponding path program 1 times [2021-08-29 11:37:31,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:37:31,425 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065542413] [2021-08-29 11:37:31,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:31,425 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:37:31,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:32,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:37:32,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:37:32,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065542413] [2021-08-29 11:37:32,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065542413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:32,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313434457] [2021-08-29 11:37:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:32,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:37:32,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:37:32,094 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 11:37:32,133 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 11:37:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:32,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-29 11:37:32,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:37:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:37:32,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:37:32,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 11:37:32,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313434457] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:32,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:37:32,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 6] total 15 [2021-08-29 11:37:32,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216120666] [2021-08-29 11:37:32,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 11:37:32,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:37:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 11:37:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-29 11:37:32,561 INFO L87 Difference]: Start difference. First operand 14 states and 18 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 11:37:34,585 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:36,800 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:37,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:37:37,024 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-08-29 11:37:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 11:37:37,025 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 10 [2021-08-29 11:37:37,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:37:37,025 INFO L225 Difference]: With dead ends: 21 [2021-08-29 11:37:37,025 INFO L226 Difference]: Without dead ends: 17 [2021-08-29 11:37:37,026 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 382.64ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-29 11:37:37,027 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4106.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.81ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4434.67ms IncrementalHoareTripleChecker+Time [2021-08-29 11:37:37,027 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.81ms Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 4434.67ms Time] [2021-08-29 11:37:37,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-29 11:37:37,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-08-29 11:37:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 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 11:37:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 21 transitions. [2021-08-29 11:37:37,030 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 21 transitions. Word has length 10 [2021-08-29 11:37:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:37:37,031 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 21 transitions. [2021-08-29 11:37:37,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 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 11:37:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 21 transitions. [2021-08-29 11:37:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 11:37:37,031 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:37:37,031 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:37:37,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 11:37:37,248 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 11:37:37,249 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:37:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:37:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash -30668939, now seen corresponding path program 1 times [2021-08-29 11:37:37,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:37:37,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832214183] [2021-08-29 11:37:37,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:37,250 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:37:37,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:37:37,421 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:37:37,421 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832214183] [2021-08-29 11:37:37,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832214183] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:37:37,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:37:37,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-29 11:37:37,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051936648] [2021-08-29 11:37:37,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 11:37:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:37:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 11:37:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-29 11:37:37,423 INFO L87 Difference]: Start difference. First operand 16 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.2) 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 11:37:39,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:41,635 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:41,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:37:41,853 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-08-29 11:37:41,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 11:37:41,854 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) 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 11:37:41,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:37:41,855 INFO L225 Difference]: With dead ends: 29 [2021-08-29 11:37:41,855 INFO L226 Difference]: Without dead ends: 19 [2021-08-29 11:37:41,856 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.95ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-08-29 11:37:41,856 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4068.24ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.87ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4411.88ms IncrementalHoareTripleChecker+Time [2021-08-29 11:37:41,857 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 57 Unknown, 0 Unchecked, 0.87ms Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 2 Unknown, 0 Unchecked, 4411.88ms Time] [2021-08-29 11:37:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-29 11:37:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-08-29 11:37:41,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 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 11:37:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-08-29 11:37:41,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 11 [2021-08-29 11:37:41,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:37:41,860 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-08-29 11:37:41,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) 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 11:37:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-08-29 11:37:41,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-29 11:37:41,861 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:37:41,861 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:37:41,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 11:37:41,861 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:37:41,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:37:41,862 INFO L82 PathProgramCache]: Analyzing trace with hash -559120592, now seen corresponding path program 1 times [2021-08-29 11:37:41,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:37:41,862 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081231899] [2021-08-29 11:37:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:41,862 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:37:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:41,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:37:41,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:37:41,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081231899] [2021-08-29 11:37:41,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081231899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:41,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671031126] [2021-08-29 11:37:41,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:41,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:37:41,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:37:41,970 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 11:37:41,971 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 11:37:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:42,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 11:37:42,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:37:42,367 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 11:37:42,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:37:42,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 11:37:42,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671031126] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:42,514 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:37:42,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 8] total 12 [2021-08-29 11:37:42,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892480924] [2021-08-29 11:37:42,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 11:37:42,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:37:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 11:37:42,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-29 11:37:42,516 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 11:37:44,544 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:46,714 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:48,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:49,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:37:49,052 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2021-08-29 11:37:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 11:37:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 14 [2021-08-29 11:37:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:37:49,053 INFO L225 Difference]: With dead ends: 27 [2021-08-29 11:37:49,053 INFO L226 Difference]: Without dead ends: 23 [2021-08-29 11:37:49,054 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 192.67ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-29 11:37:49,054 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6070.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6514.30ms IncrementalHoareTripleChecker+Time [2021-08-29 11:37:49,054 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 0 Invalid, 60 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 3 Unknown, 0 Unchecked, 6514.30ms Time] [2021-08-29 11:37:49,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-29 11:37:49,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-08-29 11:37:49,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 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 11:37:49,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-08-29 11:37:49,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 14 [2021-08-29 11:37:49,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:37:49,058 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-08-29 11:37:49,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 11:37:49,058 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-08-29 11:37:49,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-29 11:37:49,059 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:37:49,059 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:37:49,112 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 11:37:49,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:37:49,260 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:37:49,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:37:49,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1385803293, now seen corresponding path program 1 times [2021-08-29 11:37:49,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:37:49,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239845290] [2021-08-29 11:37:49,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:49,261 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:37:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:49,640 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 11:37:49,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:37:49,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239845290] [2021-08-29 11:37:49,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239845290] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:49,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114095981] [2021-08-29 11:37:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:49,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:37:49,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:37:49,741 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 11:37:49,743 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 11:37:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 11:37:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:37:50,169 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 11:37:50,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:37:50,404 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 11:37:50,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114095981] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:50,404 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:37:50,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8, 8] total 17 [2021-08-29 11:37:50,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830734017] [2021-08-29 11:37:50,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 11:37:50,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:37:50,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 11:37:50,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-29 11:37:50,406 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 11:37:52,433 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:54,674 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:56,923 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:37:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:37:57,037 INFO L93 Difference]: Finished difference Result 28 states and 37 transitions. [2021-08-29 11:37:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 11:37:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 15 [2021-08-29 11:37:57,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:37:57,039 INFO L225 Difference]: With dead ends: 28 [2021-08-29 11:37:57,039 INFO L226 Difference]: Without dead ends: 24 [2021-08-29 11:37:57,039 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 492.79ms TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-29 11:37:57,040 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6123.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.77ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6606.06ms IncrementalHoareTripleChecker+Time [2021-08-29 11:37:57,040 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 61 Unknown, 0 Unchecked, 0.77ms Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 3 Unknown, 0 Unchecked, 6606.06ms Time] [2021-08-29 11:37:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-29 11:37:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2021-08-29 11:37:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 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 11:37:57,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 27 transitions. [2021-08-29 11:37:57,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 27 transitions. Word has length 15 [2021-08-29 11:37:57,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:37:57,044 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 27 transitions. [2021-08-29 11:37:57,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 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 11:37:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 27 transitions. [2021-08-29 11:37:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-29 11:37:57,045 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:37:57,045 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:37:57,063 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 11:37:57,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:37:57,246 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:37:57,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:37:57,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1692047339, now seen corresponding path program 1 times [2021-08-29 11:37:57,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:37:57,247 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697484900] [2021-08-29 11:37:57,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:57,247 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:37:57,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:37:57,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:37:57,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697484900] [2021-08-29 11:37:57,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697484900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:57,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703412726] [2021-08-29 11:37:57,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:37:57,300 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:37:57,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:37:57,301 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 11:37:57,306 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 11:37:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:37:57,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-29 11:37:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:37:57,685 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 11:37:57,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:37:57,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-29 11:37:57,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703412726] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 11:37:57,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:37:57,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4, 8] total 12 [2021-08-29 11:37:57,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016445425] [2021-08-29 11:37:57,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 11:37:57,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:37:57,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 11:37:57,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-08-29 11:37:57,934 INFO L87 Difference]: Start difference. First operand 20 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 11:37:59,977 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:38:02,223 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:38:04,337 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:38:06,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:38:08,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:38:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:38:08,819 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2021-08-29 11:38:08,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 11:38:08,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 11:38:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:38:08,821 INFO L225 Difference]: With dead ends: 35 [2021-08-29 11:38:08,821 INFO L226 Difference]: Without dead ends: 31 [2021-08-29 11:38:08,821 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 253.06ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-08-29 11:38:08,822 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10164.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.85ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10864.57ms IncrementalHoareTripleChecker+Time [2021-08-29 11:38:08,822 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 62 Unknown, 0 Unchecked, 0.85ms Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 5 Unknown, 0 Unchecked, 10864.57ms Time] [2021-08-29 11:38:08,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-29 11:38:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-29 11:38:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.5) internal successors, (45), 30 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:38:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 45 transitions. [2021-08-29 11:38:08,825 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 45 transitions. Word has length 16 [2021-08-29 11:38:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:38:08,825 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 45 transitions. [2021-08-29 11:38:08,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 11:38:08,825 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 45 transitions. [2021-08-29 11:38:08,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-29 11:38:08,825 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:38:08,825 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:38:08,851 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 11:38:09,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:38:09,026 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:38:09,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:38:09,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1389173333, now seen corresponding path program 1 times [2021-08-29 11:38:09,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:38:09,029 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338678680] [2021-08-29 11:38:09,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:38:09,029 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:38:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:38:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:38:09,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:38:09,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338678680] [2021-08-29 11:38:09,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338678680] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:38:09,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140764267] [2021-08-29 11:38:09,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:38:09,333 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:38:09,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:38:09,337 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:38:09,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 11:38:09,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:38:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-29 11:38:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:38:09,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:38:09,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:38:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-08-29 11:38:10,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140764267] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 11:38:10,210 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:38:10,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9, 10] total 20 [2021-08-29 11:38:10,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575360601] [2021-08-29 11:38:10,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 11:38:10,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:38:10,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 11:38:10,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-29 11:38:10,211 INFO L87 Difference]: Start difference. First operand 31 states and 45 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 11:38:12,234 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:38:14,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:38:14,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:38:14,637 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2021-08-29 11:38:14,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 11:38:14,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 21 [2021-08-29 11:38:14,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:38:14,637 INFO L225 Difference]: With dead ends: 31 [2021-08-29 11:38:14,637 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 11:38:14,638 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 582.62ms TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-29 11:38:14,638 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4092.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.51ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4405.95ms IncrementalHoareTripleChecker+Time [2021-08-29 11:38:14,639 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 43 Unknown, 0 Unchecked, 0.51ms Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 4405.95ms Time] [2021-08-29 11:38:14,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 11:38:14,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 11:38:14,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 11:38:14,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 11:38:14,640 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2021-08-29 11:38:14,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:38:14,640 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 11:38:14,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 11:38:14,640 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 11:38:14,640 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 11:38:14,642 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 11:38:14,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-08-29 11:38:14,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:38:14,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:38:14,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:38:14,859 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:38:14,872 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:38:14,878 INFO L858 garLoopResultBuilder]: For program point L27(lines 27 32) no Hoare annotation was computed. [2021-08-29 11:38:14,878 INFO L858 garLoopResultBuilder]: For program point L23(lines 23 32) no Hoare annotation was computed. [2021-08-29 11:38:14,878 INFO L861 garLoopResultBuilder]: At program point L36(lines 16 37) the Hoare annotation is: true [2021-08-29 11:38:14,878 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:38:14,878 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:38:14,878 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 10) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point L29(lines 29 32) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point L29-2(lines 23 32) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point L25(lines 25 32) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L854 garLoopResultBuilder]: At program point L21-2(lines 21 34) the Hoare annotation is: (= (mod (+ ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~i~0 ULTIMATE.start_main_~v4~0 ULTIMATE.start_main_~v3~0) 4294967296) (mod ULTIMATE.start_main_~l~0 4294967296)) [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point L21-3(lines 21 34) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L858 garLoopResultBuilder]: For program point L9(lines 9 11) no Hoare annotation was computed. [2021-08-29 11:38:14,879 INFO L861 garLoopResultBuilder]: At program point L9-2(lines 8 13) the Hoare annotation is: true [2021-08-29 11:38:14,880 INFO L858 garLoopResultBuilder]: For program point L10(line 10) no Hoare annotation was computed. [2021-08-29 11:38:14,882 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:38:14,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:38:14 BoogieIcfgContainer [2021-08-29 11:38:14,905 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:38:14,906 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:38:14,906 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:38:14,906 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:38:14,907 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:37:21" (3/4) ... [2021-08-29 11:38:14,909 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:38:14,918 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-29 11:38:14,918 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:38:14,918 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:38:14,918 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:38:14,948 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:38:14,949 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:38:14,949 INFO L158 Benchmark]: Toolchain (without parser) took 53403.54ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 35.5MB in the beginning and 40.4MB in the end (delta: -4.9MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2021-08-29 11:38:14,949 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:38:14,950 INFO L158 Benchmark]: CACSL2BoogieTranslator took 163.76ms. Allocated memory is still 56.6MB. Free memory was 35.3MB in the beginning and 25.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:38:14,950 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.52ms. Allocated memory is still 56.6MB. Free memory was 25.5MB in the beginning and 39.6MB in the end (delta: -14.2MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-08-29 11:38:14,951 INFO L158 Benchmark]: Boogie Preprocessor took 17.01ms. Allocated memory is still 56.6MB. Free memory was 39.6MB in the beginning and 38.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:38:14,951 INFO L158 Benchmark]: RCFGBuilder took 179.17ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 29.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:38:14,951 INFO L158 Benchmark]: TraceAbstraction took 52959.34ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 29.3MB in the beginning and 42.9MB in the end (delta: -13.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:38:14,952 INFO L158 Benchmark]: Witness Printer took 42.55ms. Allocated memory is still 69.2MB. Free memory was 42.9MB in the beginning and 40.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:38:14,953 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 38.5MB in the end (delta: 44.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 163.76ms. Allocated memory is still 56.6MB. Free memory was 35.3MB in the beginning and 25.5MB in the end (delta: 9.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.52ms. Allocated memory is still 56.6MB. Free memory was 25.5MB in the beginning and 39.6MB in the end (delta: -14.2MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.01ms. Allocated memory is still 56.6MB. Free memory was 39.6MB in the beginning and 38.6MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 179.17ms. Allocated memory is still 56.6MB. Free memory was 38.5MB in the beginning and 29.7MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 52959.34ms. Allocated memory was 56.6MB in the beginning and 69.2MB in the end (delta: 12.6MB). Free memory was 29.3MB in the beginning and 42.9MB in the end (delta: -13.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 42.55ms. Allocated memory is still 69.2MB. Free memory was 42.9MB in the beginning and 40.4MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. 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 - PositiveResult [Line: 10]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 52886.25ms, OverallIterations: 8, TraceHistogramMax: 3, EmptinessCheckTime: 9.91ms, AutomataDifference: 46340.35ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 24.94ms, InitialAbstractionConstructionTime: 7.55ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 21 mSolverCounterUnknown, 18 SdHoareTripleChecker+Valid, 46082.08ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 18 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 42768.28ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 89 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 382 IncrementalHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 0 mSDtfsCounter, 382 mSolverCounterSat, 5.88ms SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 200 GetRequests, 107 SyntacticMatches, 15 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1987.20ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=7, InterpolantAutomatonStates: 35, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 29.98ms AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 8 NumberOfFragments, 14 HoareAnnotationTreeSize, 3 FomulaSimplifications, 194 FormulaSimplificationTreeSizeReduction, 17.05ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.13ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 41.21ms SsaConstructionTime, 289.61ms SatisfiabilityAnalysisTime, 4703.88ms InterpolantComputationTime, 177 NumberOfCodeBlocks, 177 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 235 ConstructedInterpolants, 0 QuantifiedInterpolants, 3067 SizeOfPredicates, 35 NumberOfNonLiveVariables, 371 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 37/91 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (k + j + i + v4 + v3) % 4294967296 == l % 4294967296 - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 11:38:14,986 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...