./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/diamond_2-2.c --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/loop-acceleration/diamond_2-2.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 3a7cdc2671d7dcfcceedceb0ed408847d70d2b4e ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 03:20:47,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 03:20:47,729 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 03:20:47,762 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 03:20:47,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 03:20:47,765 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 03:20:47,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 03:20:47,773 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 03:20:47,775 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 03:20:47,779 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 03:20:47,780 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 03:20:47,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 03:20:47,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 03:20:47,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 03:20:47,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 03:20:47,790 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 03:20:47,791 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 03:20:47,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 03:20:47,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 03:20:47,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 03:20:47,805 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 03:20:47,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 03:20:47,808 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 03:20:47,809 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 03:20:47,815 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 03:20:47,816 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 03:20:47,816 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 03:20:47,818 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 03:20:47,818 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 03:20:47,819 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 03:20:47,820 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 03:20:47,820 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 03:20:47,821 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 03:20:47,822 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 03:20:47,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 03:20:47,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 03:20:47,823 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 03:20:47,823 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 03:20:47,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 03:20:47,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 03:20:47,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 03:20:47,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 03:20:47,860 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 03:20:47,860 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 03:20:47,861 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 03:20:47,861 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 03:20:47,863 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 03:20:47,863 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 03:20:47,863 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 03:20:47,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 03:20:47,864 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 03:20:47,864 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 03:20:47,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 03:20:47,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 03:20:47,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 03:20:47,865 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 03:20:47,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 03:20:47,866 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 03:20:47,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 03:20:47,866 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 03:20:47,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 03:20:47,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 03:20:47,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 03:20:47,875 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 03:20:47,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:20:47,875 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 03:20:47,875 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 03:20:47,875 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 03:20:47,875 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 03:20:47,875 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 03:20:47,876 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 03:20:47,876 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 03:20:47,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a7cdc2671d7dcfcceedceb0ed408847d70d2b4e [2021-08-26 03:20:48,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 03:20:48,182 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 03:20:48,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 03:20:48,186 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 03:20:48,187 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 03:20:48,187 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2021-08-26 03:20:48,253 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3def5d17a/eae95e657dc94d7bb917f84cb8b58d8e/FLAG5815367d9 [2021-08-26 03:20:48,656 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 03:20:48,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/diamond_2-2.c [2021-08-26 03:20:48,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3def5d17a/eae95e657dc94d7bb917f84cb8b58d8e/FLAG5815367d9 [2021-08-26 03:20:49,083 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3def5d17a/eae95e657dc94d7bb917f84cb8b58d8e [2021-08-26 03:20:49,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 03:20:49,092 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 03:20:49,096 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 03:20:49,096 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 03:20:49,099 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 03:20:49,100 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,102 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32363766 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49, skipping insertion in model container [2021-08-26 03:20:49,102 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 03:20:49,122 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 03:20:49,234 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/loop-acceleration/diamond_2-2.c[373,386] [2021-08-26 03:20:49,258 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:20:49,273 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 03:20:49,291 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/loop-acceleration/diamond_2-2.c[373,386] [2021-08-26 03:20:49,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 03:20:49,331 INFO L208 MainTranslator]: Completed translation [2021-08-26 03:20:49,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49 WrapperNode [2021-08-26 03:20:49,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 03:20:49,338 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 03:20:49,338 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 03:20:49,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 03:20:49,344 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,362 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,394 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 03:20:49,395 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 03:20:49,395 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 03:20:49,395 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 03:20:49,415 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,415 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,419 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 03:20:49,429 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 03:20:49,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 03:20:49,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 03:20:49,431 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (1/1) ... [2021-08-26 03:20:49,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 03:20:49,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:49,454 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 03:20:49,467 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 03:20:49,499 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 03:20:49,499 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 03:20:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 03:20:49,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 03:20:49,843 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 03:20:49,844 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-26 03:20:49,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:49 BoogieIcfgContainer [2021-08-26 03:20:49,845 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 03:20:49,847 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 03:20:49,847 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 03:20:49,849 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 03:20:49,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 03:20:49" (1/3) ... [2021-08-26 03:20:49,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ee3bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:20:49, skipping insertion in model container [2021-08-26 03:20:49,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 03:20:49" (2/3) ... [2021-08-26 03:20:49,851 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49ee3bca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 03:20:49, skipping insertion in model container [2021-08-26 03:20:49,851 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:49" (3/3) ... [2021-08-26 03:20:49,852 INFO L111 eAbstractionObserver]: Analyzing ICFG diamond_2-2.c [2021-08-26 03:20:49,856 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 03:20:49,857 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 03:20:49,930 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 03:20:49,940 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 03:20:49,940 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 03:20:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:49,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:20:49,965 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:49,965 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:20:49,966 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:49,975 INFO L82 PathProgramCache]: Analyzing trace with hash 891600039, now seen corresponding path program 1 times [2021-08-26 03:20:49,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:49,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697154681] [2021-08-26 03:20:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:49,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:50,133 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 03:20:50,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:50,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697154681] [2021-08-26 03:20:50,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697154681] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:20:50,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:20:50,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 03:20:50,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628807972] [2021-08-26 03:20:50,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 03:20:50,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:50,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 03:20:50,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 03:20:50,164 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 03:20:50,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:50,177 INFO L93 Difference]: Finished difference Result 27 states and 39 transitions. [2021-08-26 03:20:50,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 03:20:50,178 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 03:20:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:50,187 INFO L225 Difference]: With dead ends: 27 [2021-08-26 03:20:50,187 INFO L226 Difference]: Without dead ends: 17 [2021-08-26 03:20:50,189 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 03:20:50,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-26 03:20:50,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-26 03:20:50,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.6875) internal successors, (27), 16 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) [2021-08-26 03:20:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 27 transitions. [2021-08-26 03:20:50,227 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 27 transitions. Word has length 6 [2021-08-26 03:20:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:50,228 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 27 transitions. [2021-08-26 03:20:50,228 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 03:20:50,229 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 27 transitions. [2021-08-26 03:20:50,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-26 03:20:50,230 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:50,230 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-26 03:20:50,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 03:20:50,230 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:50,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:50,234 INFO L82 PathProgramCache]: Analyzing trace with hash 889693415, now seen corresponding path program 1 times [2021-08-26 03:20:50,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:50,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577844044] [2021-08-26 03:20:50,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:50,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:50,355 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 03:20:50,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:50,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577844044] [2021-08-26 03:20:50,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577844044] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:20:50,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:20:50,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:20:50,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965070435] [2021-08-26 03:20:50,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:20:50,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:50,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:20:50,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:50,359 INFO L87 Difference]: Start difference. First operand 17 states and 27 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 03:20:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:50,420 INFO L93 Difference]: Finished difference Result 23 states and 34 transitions. [2021-08-26 03:20:50,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:20:50,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 03:20:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:50,422 INFO L225 Difference]: With dead ends: 23 [2021-08-26 03:20:50,423 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 03:20:50,423 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:50,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 03:20:50,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-08-26 03:20:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2021-08-26 03:20:50,427 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 6 [2021-08-26 03:20:50,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:50,428 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2021-08-26 03:20:50,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 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 03:20:50,428 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2021-08-26 03:20:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 03:20:50,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:50,429 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:50,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 03:20:50,429 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:50,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:50,430 INFO L82 PathProgramCache]: Analyzing trace with hash -1797740634, now seen corresponding path program 1 times [2021-08-26 03:20:50,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:50,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757549744] [2021-08-26 03:20:50,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:50,430 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:50,477 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 03:20:50,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:50,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757549744] [2021-08-26 03:20:50,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757549744] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:20:50,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:20:50,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:20:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054090735] [2021-08-26 03:20:50,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:20:50,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:50,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:20:50,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:50,484 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:50,554 INFO L93 Difference]: Finished difference Result 48 states and 78 transitions. [2021-08-26 03:20:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:20:50,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 03:20:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:50,556 INFO L225 Difference]: With dead ends: 48 [2021-08-26 03:20:50,556 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 03:20:50,556 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 03:20:50,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2021-08-26 03:20:50,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:50,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-08-26 03:20:50,561 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 17 [2021-08-26 03:20:50,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:50,561 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-08-26 03:20:50,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:50,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-08-26 03:20:50,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 03:20:50,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:50,562 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:50,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 03:20:50,563 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:50,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:50,563 INFO L82 PathProgramCache]: Analyzing trace with hash -170777494, now seen corresponding path program 1 times [2021-08-26 03:20:50,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:50,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10507365] [2021-08-26 03:20:50,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:50,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:50,893 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 03:20:50,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:50,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10507365] [2021-08-26 03:20:50,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10507365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:50,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51611409] [2021-08-26 03:20:50,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:50,898 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:50,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:50,905 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 03:20:50,945 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 03:20:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:50,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-26 03:20:50,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:51,331 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 03:20:51,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51611409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:51,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:51,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 11 [2021-08-26 03:20:51,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322971647] [2021-08-26 03:20:51,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 03:20:51,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:51,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 03:20:51,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-08-26 03:20:51,338 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:51,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:51,471 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2021-08-26 03:20:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-26 03:20:51,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 03:20:51,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:51,474 INFO L225 Difference]: With dead ends: 57 [2021-08-26 03:20:51,474 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 03:20:51,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-26 03:20:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 03:20:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-26 03:20:51,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 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 03:20:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2021-08-26 03:20:51,486 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 17 [2021-08-26 03:20:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:51,486 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2021-08-26 03:20:51,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2021-08-26 03:20:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 03:20:51,488 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:51,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:51,517 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 03:20:51,709 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 03:20:51,709 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash -784776342, now seen corresponding path program 1 times [2021-08-26 03:20:51,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:51,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718929717] [2021-08-26 03:20:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:51,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:51,758 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 03:20:51,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:51,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718929717] [2021-08-26 03:20:51,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718929717] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 03:20:51,760 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 03:20:51,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 03:20:51,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873518401] [2021-08-26 03:20:51,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 03:20:51,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:51,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 03:20:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:51,762 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:51,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:51,807 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-08-26 03:20:51,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 03:20:51,808 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 03:20:51,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:51,808 INFO L225 Difference]: With dead ends: 34 [2021-08-26 03:20:51,808 INFO L226 Difference]: Without dead ends: 19 [2021-08-26 03:20:51,809 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 03:20:51,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-26 03:20:51,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-08-26 03:20:51,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 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) [2021-08-26 03:20:51,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-08-26 03:20:51,811 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 17 [2021-08-26 03:20:51,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:51,811 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-08-26 03:20:51,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:51,811 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-08-26 03:20:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 03:20:51,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:51,820 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:51,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 03:20:51,821 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -843881686, now seen corresponding path program 1 times [2021-08-26 03:20:51,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:51,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724819172] [2021-08-26 03:20:51,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:51,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:52,053 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 03:20:52,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:52,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724819172] [2021-08-26 03:20:52,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724819172] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:52,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492976708] [2021-08-26 03:20:52,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:52,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:52,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:52,062 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 03:20:52,065 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 03:20:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:52,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-26 03:20:52,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:52,296 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 03:20:52,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492976708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:52,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:52,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-08-26 03:20:52,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252561291] [2021-08-26 03:20:52,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 03:20:52,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:52,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 03:20:52,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:20:52,299 INFO L87 Difference]: Start difference. First operand 18 states and 18 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 03:20:52,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:52,454 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-08-26 03:20:52,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 03:20:52,455 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 17 [2021-08-26 03:20:52,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:52,455 INFO L225 Difference]: With dead ends: 34 [2021-08-26 03:20:52,455 INFO L226 Difference]: Without dead ends: 30 [2021-08-26 03:20:52,455 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-26 03:20:52,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-26 03:20:52,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-08-26 03:20:52,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:52,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-08-26 03:20:52,459 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 17 [2021-08-26 03:20:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:52,459 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-08-26 03:20:52,459 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 03:20:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-08-26 03:20:52,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-26 03:20:52,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:52,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:52,519 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 03:20:52,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-26 03:20:52,681 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:52,682 INFO L82 PathProgramCache]: Analyzing trace with hash -2006766329, now seen corresponding path program 2 times [2021-08-26 03:20:52,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:52,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269171653] [2021-08-26 03:20:52,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:52,682 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:53,203 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:53,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:53,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269171653] [2021-08-26 03:20:53,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269171653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:53,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181785906] [2021-08-26 03:20:53,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-26 03:20:53,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:53,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:53,209 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 03:20:53,211 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 03:20:53,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-26 03:20:53,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:53,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 03:20:53,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:53,616 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:53,616 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181785906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:53,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:53,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-08-26 03:20:53,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684269239] [2021-08-26 03:20:53,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-26 03:20:53,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:53,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-26 03:20:53,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:20:53,619 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:53,967 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-08-26 03:20:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-26 03:20:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-26 03:20:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:53,969 INFO L225 Difference]: With dead ends: 45 [2021-08-26 03:20:53,969 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 03:20:53,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 361.5ms TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-08-26 03:20:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 03:20:53,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-08-26 03:20:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:53,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-08-26 03:20:53,981 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 28 [2021-08-26 03:20:53,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:53,981 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-08-26 03:20:53,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:20:53,983 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-08-26 03:20:53,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-26 03:20:53,984 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:53,984 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:54,016 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 03:20:54,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:54,200 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:54,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1182300406, now seen corresponding path program 3 times [2021-08-26 03:20:54,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:54,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178970018] [2021-08-26 03:20:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:54,201 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:55,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:55,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:55,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178970018] [2021-08-26 03:20:55,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178970018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:55,091 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587635036] [2021-08-26 03:20:55,092 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-26 03:20:55,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:55,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:55,097 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 03:20:55,099 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 03:20:55,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-26 03:20:55,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:55,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 63 conjunts are in the unsatisfiable core [2021-08-26 03:20:55,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:20:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:55,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587635036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:55,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:20:55,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-08-26 03:20:55,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802191050] [2021-08-26 03:20:55,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-26 03:20:55,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:20:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-26 03:20:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:20:55,587 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 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 03:20:56,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:20:56,232 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-08-26 03:20:56,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-26 03:20:56,233 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-08-26 03:20:56,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:20:56,233 INFO L225 Difference]: With dead ends: 56 [2021-08-26 03:20:56,233 INFO L226 Difference]: Without dead ends: 52 [2021-08-26 03:20:56,234 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 682.9ms TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2021-08-26 03:20:56,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-26 03:20:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-08-26 03:20:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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 03:20:56,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-08-26 03:20:56,245 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 39 [2021-08-26 03:20:56,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:20:56,247 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-08-26 03:20:56,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 34 states have internal predecessors, (41), 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 03:20:56,248 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-08-26 03:20:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-26 03:20:56,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:20:56,252 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-08-26 03:20:56,277 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 03:20:56,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:56,471 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:20:56,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:20:56,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1256465113, now seen corresponding path program 4 times [2021-08-26 03:20:56,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:20:56,472 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403209193] [2021-08-26 03:20:56,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:20:56,472 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:20:56,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:20:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:20:57,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:20:57,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403209193] [2021-08-26 03:20:57,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403209193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:20:57,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911116283] [2021-08-26 03:20:57,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-26 03:20:57,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:20:57,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:20:57,641 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) [2021-08-26 03:20:57,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-26 03:20:57,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-26 03:20:57,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:20:57,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-26 03:20:57,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:00,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911116283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:00,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:00,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44] total 84 [2021-08-26 03:21:00,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996092262] [2021-08-26 03:21:00,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-26 03:21:00,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:00,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-26 03:21:00,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2021-08-26 03:21:00,658 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 84 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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 03:21:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:02,133 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-08-26 03:21:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-26 03:21:02,133 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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 50 [2021-08-26 03:21:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:02,134 INFO L225 Difference]: With dead ends: 67 [2021-08-26 03:21:02,134 INFO L226 Difference]: Without dead ends: 63 [2021-08-26 03:21:02,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 3255.5ms TimeCoverageRelationStatistics Valid=284, Invalid=6688, Unknown=0, NotChecked=0, Total=6972 [2021-08-26 03:21:02,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-26 03:21:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-08-26 03:21:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 03:21:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-08-26 03:21:02,156 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 50 [2021-08-26 03:21:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:02,156 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-08-26 03:21:02,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.1428571428571428) internal successors, (96), 84 states have internal predecessors, (96), 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 03:21:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-08-26 03:21:02,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-26 03:21:02,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 03:21:02,157 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1] [2021-08-26 03:21:02,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-26 03:21:02,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:02,377 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 03:21:02,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 03:21:02,377 INFO L82 PathProgramCache]: Analyzing trace with hash 28672746, now seen corresponding path program 5 times [2021-08-26 03:21:02,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 03:21:02,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157969149] [2021-08-26 03:21:02,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 03:21:02,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 03:21:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 03:21:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2021-08-26 03:21:03,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 03:21:03,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157969149] [2021-08-26 03:21:03,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157969149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:03,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586356518] [2021-08-26 03:21:03,085 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-26 03:21:03,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:03,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 03:21:03,089 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 03:21:03,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-26 03:21:03,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-26 03:21:03,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-26 03:21:03,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-26 03:21:03,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 03:21:05,379 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 03:21:05,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586356518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 03:21:05,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 03:21:05,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 54] total 57 [2021-08-26 03:21:05,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141631618] [2021-08-26 03:21:05,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-26 03:21:05,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 03:21:05,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-26 03:21:05,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3003, Unknown=0, NotChecked=0, Total=3192 [2021-08-26 03:21:05,385 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 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 03:21:07,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 03:21:07,243 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2021-08-26 03:21:07,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-26 03:21:07,244 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 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 61 [2021-08-26 03:21:07,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 03:21:07,246 INFO L225 Difference]: With dead ends: 75 [2021-08-26 03:21:07,246 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 03:21:07,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 11 SyntacticMatches, 48 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 2168.4ms TimeCoverageRelationStatistics Valid=256, Invalid=4574, Unknown=0, NotChecked=0, Total=4830 [2021-08-26 03:21:07,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 03:21:07,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 03:21:07,249 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) [2021-08-26 03:21:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 03:21:07,249 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 61 [2021-08-26 03:21:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 03:21:07,250 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 03:21:07,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 57 states have internal predecessors, (77), 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 03:21:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 03:21:07,251 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 03:21:07,253 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 03:21:07,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-08-26 03:21:07,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 03:21:07,471 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 03:21:07,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:21:07,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 03:21:07,631 INFO L857 garLoopResultBuilder]: For program point L27-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,631 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-08-26 03:21:07,632 INFO L860 garLoopResultBuilder]: At program point L7-2(lines 1 50) the Hoare annotation is: true [2021-08-26 03:21:07,644 INFO L857 garLoopResultBuilder]: For program point L36-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,645 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 03:21:07,645 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 03:21:07,645 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 03:21:07,646 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-08-26 03:21:07,646 INFO L857 garLoopResultBuilder]: For program point L24-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,646 INFO L853 garLoopResultBuilder]: At program point L45-1(lines 17 47) the Hoare annotation is: (let ((.cse1 (mod ULTIMATE.start_main_~y~0 2))) (let ((.cse0 (<= .cse1 0))) (or (= ULTIMATE.start_main_~x~0 0) (and (= ULTIMATE.start_main_~x~0 80) .cse0) (and (= (+ ULTIMATE.start_main_~x~0 5) 0) (not (= .cse1 0))) (and .cse0 (<= ULTIMATE.start_main_~x~0 40) (<= 40 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 100) .cse0) (and (<= ULTIMATE.start_main_~x~0 60) .cse0 (<= 60 ULTIMATE.start_main_~x~0)) (and (= ULTIMATE.start_main_~x~0 20) .cse0)))) [2021-08-26 03:21:07,646 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-08-26 03:21:07,646 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L33-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L21-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L17-2(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L42-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L30-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L18(lines 18 19) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L18-2(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,647 INFO L857 garLoopResultBuilder]: For program point L39-1(lines 17 47) no Hoare annotation was computed. [2021-08-26 03:21:07,652 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 03:21:07,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 03:21:07 BoogieIcfgContainer [2021-08-26 03:21:07,680 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 03:21:07,680 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 03:21:07,680 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 03:21:07,681 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 03:21:07,681 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 03:20:49" (3/4) ... [2021-08-26 03:21:07,685 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 03:21:07,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-26 03:21:07,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-26 03:21:07,705 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:21:07,706 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 03:21:07,773 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 03:21:07,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 03:21:07,775 INFO L168 Benchmark]: Toolchain (without parser) took 18681.83 ms. Allocated memory was 50.3 MB in the beginning and 195.0 MB in the end (delta: 144.7 MB). Free memory was 27.6 MB in the beginning and 70.3 MB in the end (delta: -42.7 MB). Peak memory consumption was 103.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:21:07,775 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 50.3 MB. Free memory was 32.4 MB in the beginning and 32.3 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 03:21:07,776 INFO L168 Benchmark]: CACSL2BoogieTranslator took 241.42 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 29.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:21:07,776 INFO L168 Benchmark]: Boogie Procedure Inliner took 56.19 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 29.0 MB in the beginning and 46.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-08-26 03:21:07,776 INFO L168 Benchmark]: Boogie Preprocessor took 33.86 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 45.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:21:07,776 INFO L168 Benchmark]: RCFGBuilder took 416.20 ms. Allocated memory is still 62.9 MB. Free memory was 45.1 MB in the beginning and 45.5 MB in the end (delta: -368.9 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. [2021-08-26 03:21:07,777 INFO L168 Benchmark]: TraceAbstraction took 17832.77 ms. Allocated memory was 62.9 MB in the beginning and 195.0 MB in the end (delta: 132.1 MB). Free memory was 45.2 MB in the beginning and 72.4 MB in the end (delta: -27.1 MB). Peak memory consumption was 104.8 MB. Max. memory is 16.1 GB. [2021-08-26 03:21:07,777 INFO L168 Benchmark]: Witness Printer took 92.79 ms. Allocated memory is still 195.0 MB. Free memory was 72.4 MB in the beginning and 70.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 03:21:07,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 50.3 MB. Free memory was 32.4 MB in the beginning and 32.3 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 241.42 ms. Allocated memory is still 50.3 MB. Free memory was 27.4 MB in the beginning and 29.0 MB in the end (delta: -1.6 MB). Peak memory consumption was 5.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 56.19 ms. Allocated memory was 50.3 MB in the beginning and 62.9 MB in the end (delta: 12.6 MB). Free memory was 29.0 MB in the beginning and 46.3 MB in the end (delta: -17.3 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.86 ms. Allocated memory is still 62.9 MB. Free memory was 46.3 MB in the beginning and 45.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 416.20 ms. Allocated memory is still 62.9 MB. Free memory was 45.1 MB in the beginning and 45.5 MB in the end (delta: -368.9 kB). Peak memory consumption was 18.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17832.77 ms. Allocated memory was 62.9 MB in the beginning and 195.0 MB in the end (delta: 132.1 MB). Free memory was 45.2 MB in the beginning and 72.4 MB in the end (delta: -27.1 MB). Peak memory consumption was 104.8 MB. Max. memory is 16.1 GB. * Witness Printer took 92.79 ms. Allocated memory is still 195.0 MB. Free memory was 72.4 MB in the beginning and 70.3 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 - PositiveResult [Line: 8]: 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, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 17735.3ms, OverallIterations: 10, TraceHistogramMax: 5, EmptinessCheckTime: 23.7ms, AutomataDifference: 4871.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 161.4ms, InitialAbstractionConstructionTime: 11.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 47 SDslu, 298 SDs, 0 SdLazy, 8151 SolverSat, 174 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3192.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 416 GetRequests, 130 SyntacticMatches, 57 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 6742.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=9, InterpolantAutomatonStates: 186, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.1ms AutomataMinimizationTime, 10 MinimizatonAttempts, 10 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 68 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 44.7ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 62 FormulaSimplificationTreeSizeReductionInter, 110.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 77.5ms SsaConstructionTime, 577.7ms SatisfiabilityAnalysisTime, 9779.6ms InterpolantComputationTime, 470 NumberOfCodeBlocks, 464 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 4035 SizeOfPredicates, 12 NumberOfNonLiveVariables, 870 ConjunctsInSsa, 347 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 104/474 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: 1]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (((((x == 0 || (x == 80 && y % 2 <= 0)) || (x + 5 == 0 && !(y % 2 == 0))) || ((y % 2 <= 0 && x <= 40) && 40 <= x)) || (x == 100 && y % 2 <= 0)) || ((x <= 60 && y % 2 <= 0) && 60 <= x)) || (x == 20 && y % 2 <= 0) RESULT: Ultimate proved your program to be correct! [2021-08-26 03:21:07,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...