./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dfd48abfacd60a3a4485060da29ebb446d23ac13 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:10:35,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:10:35,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:10:35,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:10:35,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:10:35,668 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:10:35,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:10:35,675 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:10:35,678 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:10:35,683 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:10:35,683 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:10:35,684 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:10:35,684 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:10:35,686 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:10:35,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:10:35,689 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:10:35,690 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:10:35,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:10:35,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:10:35,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:10:35,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:10:35,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:10:35,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:10:35,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:10:35,704 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:10:35,707 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:10:35,707 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:10:35,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:10:35,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:10:35,709 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:10:35,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:10:35,710 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:10:35,710 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:10:35,711 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:10:35,712 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:10:35,712 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:10:35,713 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:10:35,713 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:10:35,713 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:10:35,714 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:10:35,715 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:10:35,715 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:10:35,743 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:10:35,743 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:10:35,744 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:10:35,744 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:10:35,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:10:35,746 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:10:35,746 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:10:35,746 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:10:35,746 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:10:35,746 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:10:35,747 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:10:35,747 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:10:35,747 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:10:35,747 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:10:35,748 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:10:35,748 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:10:35,748 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:10:35,748 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:10:35,748 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:10:35,748 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:10:35,748 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:10:35,748 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:10:35,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:10:35,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:10:35,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:10:35,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:10:35,749 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:10:35,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:10:35,749 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:10:35,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:10:35,750 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dfd48abfacd60a3a4485060da29ebb446d23ac13 [2021-08-26 03:10:36,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:10:36,055 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:10:36,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:10:36,058 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:10:36,059 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:10:36,059 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-08-26 03:10:36,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097fe0034/f069f2291aba4e47af2620168347b39f/FLAG67afa1f4a [2021-08-26 03:10:36,466 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:10:36,467 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01_bug02_sum01_bug02_base.case.i [2021-08-26 03:10:36,470 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097fe0034/f069f2291aba4e47af2620168347b39f/FLAG67afa1f4a [2021-08-26 03:10:36,479 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/097fe0034/f069f2291aba4e47af2620168347b39f [2021-08-26 03:10:36,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:10:36,482 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:10:36,482 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:10:36,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:10:36,485 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:10:36,485 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,486 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5516d4f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36, skipping insertion in model container [2021-08-26 03:10:36,486 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:10:36,499 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:10:36,573 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-08-26 03:10:36,579 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:10:36,584 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:10:36,592 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/sum01_bug02_sum01_bug02_base.case.i[834,847] [2021-08-26 03:10:36,594 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:10:36,655 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:10:36,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36 WrapperNode [2021-08-26 03:10:36,657 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:10:36,658 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:10:36,658 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:10:36,659 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:10:36,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,681 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:10:36,682 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:10:36,682 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:10:36,682 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:10:36,687 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,687 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,702 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,710 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:10:36,711 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:10:36,712 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:10:36,712 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:10:36,712 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (1/1) ... [2021-08-26 03:10:36,718 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:10:36,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:36,738 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) [2021-08-26 03:10:36,776 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 [2021-08-26 03:10:36,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:10:36,789 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:10:36,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:10:36,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:10:36,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:10:36,969 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:10:36,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:10:36 BoogieIcfgContainer [2021-08-26 03:10:36,970 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:10:36,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:10:36,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:10:36,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:10:36,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:10:36" (1/3) ... [2021-08-26 03:10:36,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7ac176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:10:36, skipping insertion in model container [2021-08-26 03:10:36,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:10:36" (2/3) ... [2021-08-26 03:10:36,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e7ac176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:10:36, skipping insertion in model container [2021-08-26 03:10:36,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:10:36" (3/3) ... [2021-08-26 03:10:36,977 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2021-08-26 03:10:36,980 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:10:36,981 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:10:37,019 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:10:37,025 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 [2021-08-26 03:10:37,025 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:10:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2021-08-26 03:10:37,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:10:37,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:37,055 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:10:37,056 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:37,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:37,060 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-08-26 03:10:37,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:37,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791893979] [2021-08-26 03:10:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:37,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:37,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:37,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791893979] [2021-08-26 03:10:37,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791893979] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:10:37,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:10:37,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:10:37,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774985629] [2021-08-26 03:10:37,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:10:37,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:37,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:10:37,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:10:37,227 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:37,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:37,248 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-08-26 03:10:37,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:10:37,249 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:10:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:37,254 INFO L225 Difference]: With dead ends: 19 [2021-08-26 03:10:37,254 INFO L226 Difference]: Without dead ends: 9 [2021-08-26 03:10:37,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:10:37,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-08-26 03:10:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-08-26 03:10:37,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 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) [2021-08-26 03:10:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-26 03:10:37,273 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-26 03:10:37,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:37,274 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-26 03:10:37,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:37,274 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-26 03:10:37,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:10:37,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:37,275 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:10:37,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:10:37,276 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:37,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:37,278 INFO L82 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-08-26 03:10:37,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:37,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010788719] [2021-08-26 03:10:37,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:37,279 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:37,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:37,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:37,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010788719] [2021-08-26 03:10:37,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010788719] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:10:37,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:10:37,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 03:10:37,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972366068] [2021-08-26 03:10:37,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 03:10:37,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:37,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 03:10:37,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-26 03:10:37,376 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:37,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:37,410 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-08-26 03:10:37,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:10:37,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2021-08-26 03:10:37,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:37,412 INFO L225 Difference]: With dead ends: 14 [2021-08-26 03:10:37,412 INFO L226 Difference]: Without dead ends: 10 [2021-08-26 03:10:37,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:10:37,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-26 03:10:37,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-08-26 03:10:37,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 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) [2021-08-26 03:10:37,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-08-26 03:10:37,417 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 6 [2021-08-26 03:10:37,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:37,417 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-08-26 03:10:37,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:37,418 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-08-26 03:10:37,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 03:10:37,418 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:37,418 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:37,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:10:37,419 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:37,427 INFO L82 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-08-26 03:10:37,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:37,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566410914] [2021-08-26 03:10:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:37,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:37,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:37,472 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:37,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566410914] [2021-08-26 03:10:37,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566410914] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:10:37,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:10:37,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:10:37,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647194841] [2021-08-26 03:10:37,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:10:37,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:10:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:10:37,478 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:37,499 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-08-26 03:10:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:10:37,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-08-26 03:10:37,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:37,505 INFO L225 Difference]: With dead ends: 19 [2021-08-26 03:10:37,505 INFO L226 Difference]: Without dead ends: 12 [2021-08-26 03:10:37,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:10:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-26 03:10:37,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-08-26 03:10:37,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 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) [2021-08-26 03:10:37,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-08-26 03:10:37,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 9 [2021-08-26 03:10:37,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:37,509 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-08-26 03:10:37,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:37,509 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-08-26 03:10:37,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-26 03:10:37,510 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:37,510 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:37,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 03:10:37,510 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:37,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:37,511 INFO L82 PathProgramCache]: Analyzing trace with hash -275361512, now seen corresponding path program 1 times [2021-08-26 03:10:37,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:37,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147385114] [2021-08-26 03:10:37,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:37,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:37,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:37,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:37,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:37,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147385114] [2021-08-26 03:10:37,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147385114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:37,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509379761] [2021-08-26 03:10:37,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:37,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:37,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:37,741 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) [2021-08-26 03:10:37,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 03:10:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-26 03:10:37,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:38,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:38,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509379761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:38,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:38,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-26 03:10:38,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583828516] [2021-08-26 03:10:38,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 03:10:38,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 03:10:38,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:10:38,118 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-08-26 03:10:38,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:38,199 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-08-26 03:10:38,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-26 03:10:38,200 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 9 [2021-08-26 03:10:38,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:38,200 INFO L225 Difference]: With dead ends: 17 [2021-08-26 03:10:38,200 INFO L226 Difference]: Without dead ends: 13 [2021-08-26 03:10:38,200 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 166.5ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-26 03:10:38,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-26 03:10:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-26 03:10:38,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 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) [2021-08-26 03:10:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-08-26 03:10:38,202 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2021-08-26 03:10:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:38,202 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-26 03:10:38,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-08-26 03:10:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-08-26 03:10:38,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:10:38,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:38,202 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:38,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:38,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:38,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1631725588, now seen corresponding path program 1 times [2021-08-26 03:10:38,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:38,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934822348] [2021-08-26 03:10:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:38,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:38,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:38,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:38,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934822348] [2021-08-26 03:10:38,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934822348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:38,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738114896] [2021-08-26 03:10:38,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:38,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:38,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:38,445 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) [2021-08-26 03:10:38,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 03:10:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 03:10:38,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:38,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:38,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738114896] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:38,588 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:38,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-26 03:10:38,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993706361] [2021-08-26 03:10:38,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 03:10:38,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 03:10:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:10:38,591 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:38,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:38,627 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-08-26 03:10:38,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 03:10:38,628 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 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 12 [2021-08-26 03:10:38,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:38,628 INFO L225 Difference]: With dead ends: 22 [2021-08-26 03:10:38,628 INFO L226 Difference]: Without dead ends: 15 [2021-08-26 03:10:38,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-26 03:10:38,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-26 03:10:38,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-08-26 03:10:38,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 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) [2021-08-26 03:10:38,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-26 03:10:38,631 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2021-08-26 03:10:38,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:38,632 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-26 03:10:38,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:38,632 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-26 03:10:38,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 03:10:38,632 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:38,632 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:38,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:38,837 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 [2021-08-26 03:10:38,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1688983890, now seen corresponding path program 2 times [2021-08-26 03:10:38,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:38,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492490788] [2021-08-26 03:10:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:38,839 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:38,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:38,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:38,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:38,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492490788] [2021-08-26 03:10:38,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492490788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:38,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294543303] [2021-08-26 03:10:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:10:38,998 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:38,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:39,001 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) [2021-08-26 03:10:39,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 03:10:39,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:10:39,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:10:39,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-26 03:10:39,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:39,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:39,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294543303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:39,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:39,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-26 03:10:39,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52459089] [2021-08-26 03:10:39,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:10:39,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:39,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:10:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:10:39,348 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:39,537 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2021-08-26 03:10:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 03:10:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-26 03:10:39,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:39,538 INFO L225 Difference]: With dead ends: 25 [2021-08-26 03:10:39,538 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 03:10:39,538 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 254.2ms TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-26 03:10:39,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 03:10:39,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-26 03:10:39,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 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) [2021-08-26 03:10:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-08-26 03:10:39,540 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2021-08-26 03:10:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:39,541 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-08-26 03:10:39,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:39,541 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-08-26 03:10:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-26 03:10:39,541 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:39,541 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:39,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:39,758 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 [2021-08-26 03:10:39,758 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:39,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:39,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1778778726, now seen corresponding path program 2 times [2021-08-26 03:10:39,759 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:39,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611117044] [2021-08-26 03:10:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:39,759 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:10:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:39,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:10:39,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611117044] [2021-08-26 03:10:39,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611117044] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:39,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056894180] [2021-08-26 03:10:39,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:10:39,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:10:39,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:10:39,787 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) [2021-08-26 03:10:39,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-26 03:10:39,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:10:39,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:10:39,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 03:10:39,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:10:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:10:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056894180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:10:39,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:10:39,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-26 03:10:39,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024920872] [2021-08-26 03:10:39,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 03:10:39,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:10:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 03:10:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:10:39,887 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:39,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:10:39,904 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-08-26 03:10:39,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 03:10:39,905 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-26 03:10:39,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:10:39,905 INFO L225 Difference]: With dead ends: 26 [2021-08-26 03:10:39,905 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 03:10:39,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-26 03:10:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 03:10:39,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-26 03:10:39,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:39,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-26 03:10:39,908 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-08-26 03:10:39,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:10:39,908 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-26 03:10:39,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:10:39,908 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-26 03:10:39,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-26 03:10:39,909 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:10:39,909 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:10:39,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-26 03:10:40,124 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 [2021-08-26 03:10:40,125 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:10:40,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:10:40,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1928524372, now seen corresponding path program 3 times [2021-08-26 03:10:40,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:10:40,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353977764] [2021-08-26 03:10:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:10:40,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:10:40,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:10:40,142 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-26 03:10:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-26 03:10:40,160 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-26 03:10:40,160 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-26 03:10:40,161 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:10:40,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-26 03:10:40,166 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:10:40,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:10:40 BoogieIcfgContainer [2021-08-26 03:10:40,191 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:10:40,192 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:10:40,192 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:10:40,192 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:10:40,192 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:10:36" (3/4) ... [2021-08-26 03:10:40,194 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-26 03:10:40,238 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:10:40,238 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:10:40,239 INFO L168 Benchmark]: Toolchain (without parser) took 3757.10 ms. Allocated memory was 65.0 MB in the beginning and 109.1 MB in the end (delta: 44.0 MB). Free memory was 45.9 MB in the beginning and 88.6 MB in the end (delta: -42.7 MB). Peak memory consumption was 757.9 kB. Max. memory is 16.1 GB. [2021-08-26 03:10:40,239 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory was 47.4 MB in the beginning and 47.4 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:10:40,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 174.88 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 49.1 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:40,240 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.40 ms. Allocated memory is still 65.0 MB. Free memory was 48.9 MB in the beginning and 47.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:10:40,240 INFO L168 Benchmark]: Boogie Preprocessor took 28.77 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 46.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:10:40,240 INFO L168 Benchmark]: RCFGBuilder took 259.23 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 35.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:40,240 INFO L168 Benchmark]: TraceAbstraction took 3219.49 ms. Allocated memory was 65.0 MB in the beginning and 109.1 MB in the end (delta: 44.0 MB). Free memory was 35.1 MB in the beginning and 90.7 MB in the end (delta: -55.6 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:40,241 INFO L168 Benchmark]: Witness Printer took 46.25 ms. Allocated memory is still 109.1 MB. Free memory was 90.7 MB in the beginning and 88.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:10:40,242 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 65.0 MB. Free memory was 47.4 MB in the beginning and 47.4 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 174.88 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 49.1 MB in the end (delta: -3.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 23.40 ms. Allocated memory is still 65.0 MB. Free memory was 48.9 MB in the beginning and 47.6 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 28.77 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 46.6 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 259.23 ms. Allocated memory is still 65.0 MB. Free memory was 46.6 MB in the beginning and 35.7 MB in the end (delta: 10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3219.49 ms. Allocated memory was 65.0 MB in the beginning and 109.1 MB in the end (delta: 44.0 MB). Free memory was 35.1 MB in the beginning and 90.7 MB in the end (delta: -55.6 MB). Peak memory consumption was 48.4 MB. Max. memory is 16.1 GB. * Witness Printer took 46.25 ms. Allocated memory is still 109.1 MB. Free memory was 90.7 MB in the beginning and 88.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND FALSE !(i==4) [L24] i++ [L24] COND TRUE i<=n [L25] sn = sn + (2) [L26] COND TRUE i==4 [L26] sn=-10 [L24] i++ [L24] COND FALSE !(i<=n) [L15] COND TRUE !(cond) [L16] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3147.4ms, OverallIterations: 8, TraceHistogramMax: 4, EmptinessCheckTime: 24.0ms, AutomataDifference: 434.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 50 SDtfs, 25 SDslu, 63 SDs, 0 SdLazy, 204 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 140.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 88 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 470.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=6, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 24.3ms AutomataMinimizationTime, 7 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 37.1ms SsaConstructionTime, 146.2ms SatisfiabilityAnalysisTime, 1271.5ms InterpolantComputationTime, 135 NumberOfCodeBlocks, 135 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 106 ConstructedInterpolants, 0 QuantifiedInterpolants, 508 SizeOfPredicates, 8 NumberOfNonLiveVariables, 210 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 11 InterpolantComputations, 3 PerfectInterpolantSequences, 17/47 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-26 03:10:40,265 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...