./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/loopv3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/loopv3.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 9ebaec521ed2c9582e10a9f9cb6fcb8959383ae8 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 11:23:12,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:23:12,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:23:12,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:23:12,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:23:12,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:23:12,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:23:12,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:23:12,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:23:12,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:23:12,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:23:12,761 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:23:12,761 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:23:12,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:23:12,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:23:12,764 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:23:12,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:23:12,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:23:12,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:23:12,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:23:12,770 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:23:12,772 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:23:12,773 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:23:12,774 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:23:12,777 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:23:12,777 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:23:12,777 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:23:12,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:23:12,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:23:12,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:23:12,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:23:12,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:23:12,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:23:12,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:23:12,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:23:12,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:23:12,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:23:12,793 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:23:12,793 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:23:12,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:23:12,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:23:12,799 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:23:12,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:23:12,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:23:12,830 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:23:12,830 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:23:12,832 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:23:12,832 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:23:12,832 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:23:12,833 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:23:12,833 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:23:12,833 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:23:12,834 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:23:12,834 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:23:12,834 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:23:12,834 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:23:12,834 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:23:12,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:23:12,835 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:23:12,835 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:23:12,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:23:12,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:23:12,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:23:12,836 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:23:12,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:23:12,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:23:12,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:23:12,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:23:12,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:23:12,837 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:23:12,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:23:12,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:23:12,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ebaec521ed2c9582e10a9f9cb6fcb8959383ae8 [2021-08-29 11:23:13,106 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:23:13,123 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:23:13,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:23:13,126 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:23:13,127 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:23:13,128 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/loopv3.c [2021-08-29 11:23:13,183 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc448a167/1d7ca9fef21a4ef6a2197568b79e6769/FLAG9917d3899 [2021-08-29 11:23:13,586 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:23:13,586 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv3.c [2021-08-29 11:23:13,592 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc448a167/1d7ca9fef21a4ef6a2197568b79e6769/FLAG9917d3899 [2021-08-29 11:23:13,605 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc448a167/1d7ca9fef21a4ef6a2197568b79e6769 [2021-08-29 11:23:13,607 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:23:13,609 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:23:13,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:23:13,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:23:13,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:23:13,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@371dde96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13, skipping insertion in model container [2021-08-29 11:23:13,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:23:13,634 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:23:13,774 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] [2021-08-29 11:23:13,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:23:13,794 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:23:13,814 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/loopv3.c[456,469] [2021-08-29 11:23:13,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:23:13,844 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:23:13,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13 WrapperNode [2021-08-29 11:23:13,846 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:23:13,847 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:23:13,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:23:13,848 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:23:13,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:23:13,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:23:13,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:23:13,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:23:13,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,896 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,898 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,899 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:23:13,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:23:13,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:23:13,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:23:13,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (1/1) ... [2021-08-29 11:23:13,909 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:23:13,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:13,930 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-29 11:23:13,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-29 11:23:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:23:13,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:23:13,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:23:13,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:23:14,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:23:14,112 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-08-29 11:23:14,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:23:14 BoogieIcfgContainer [2021-08-29 11:23:14,113 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:23:14,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:23:14,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:23:14,118 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:23:14,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:23:13" (1/3) ... [2021-08-29 11:23:14,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c82030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:23:14, skipping insertion in model container [2021-08-29 11:23:14,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:23:13" (2/3) ... [2021-08-29 11:23:14,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c82030 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:23:14, skipping insertion in model container [2021-08-29 11:23:14,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:23:14" (3/3) ... [2021-08-29 11:23:14,121 INFO L111 eAbstractionObserver]: Analyzing ICFG loopv3.c [2021-08-29 11:23:14,126 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:23:14,126 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-29 11:23:14,176 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:23:14,185 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-29 11:23:14,185 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-29 11:23:14,199 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:14,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 11:23:14,205 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:14,205 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 11:23:14,206 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:14,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:14,211 INFO L82 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-08-29 11:23:14,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:14,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466989137] [2021-08-29 11:23:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:14,220 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:14,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:14,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466989137] [2021-08-29 11:23:14,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466989137] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:23:14,377 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:23:14,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 11:23:14,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668210025] [2021-08-29 11:23:14,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 11:23:14,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:14,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 11:23:14,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:23:14,405 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:14,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:14,436 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-08-29 11:23:14,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 11:23:14,438 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 [2021-08-29 11:23:14,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:14,444 INFO L225 Difference]: With dead ends: 20 [2021-08-29 11:23:14,444 INFO L226 Difference]: Without dead ends: 8 [2021-08-29 11:23:14,446 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.03ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 11:23:14,449 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.18ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.72ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:14,449 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 13 Unknown, 0 Unchecked, 0.18ms Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 19.72ms Time] [2021-08-29 11:23:14,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-08-29 11:23:14,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-08-29 11:23:14,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:14,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2021-08-29 11:23:14,472 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2021-08-29 11:23:14,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:14,473 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2021-08-29 11:23:14,473 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) [2021-08-29 11:23:14,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2021-08-29 11:23:14,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-08-29 11:23:14,474 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:14,474 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-08-29 11:23:14,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 11:23:14,475 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:14,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:14,475 INFO L82 PathProgramCache]: Analyzing trace with hash 889639793, now seen corresponding path program 1 times [2021-08-29 11:23:14,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:14,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531663379] [2021-08-29 11:23:14,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:14,476 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:14,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:14,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:14,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531663379] [2021-08-29 11:23:14,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531663379] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 11:23:14,527 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:23:14,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 11:23:14,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326978352] [2021-08-29 11:23:14,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 11:23:14,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:14,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 11:23:14,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:23:14,530 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 4 states, 4 states have (on average 1.5) 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) [2021-08-29 11:23:14,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:14,556 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2021-08-29 11:23:14,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 11:23:14,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) 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 [2021-08-29 11:23:14,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:14,558 INFO L225 Difference]: With dead ends: 14 [2021-08-29 11:23:14,558 INFO L226 Difference]: Without dead ends: 10 [2021-08-29 11:23:14,558 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.95ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-29 11:23:14,559 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.45ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.19ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:14,560 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 0 Invalid, 19 Unknown, 0 Unchecked, 0.45ms Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 20.19ms Time] [2021-08-29 11:23:14,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-08-29 11:23:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-08-29 11:23:14,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:14,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-08-29 11:23:14,563 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-08-29 11:23:14,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:14,564 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-08-29 11:23:14,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) 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) [2021-08-29 11:23:14,564 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-08-29 11:23:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-29 11:23:14,565 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:14,565 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:23:14,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 11:23:14,565 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:14,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:14,566 INFO L82 PathProgramCache]: Analyzing trace with hash 297538966, now seen corresponding path program 1 times [2021-08-29 11:23:14,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:14,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123703761] [2021-08-29 11:23:14,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:14,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:14,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:14,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123703761] [2021-08-29 11:23:14,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123703761] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:14,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372220858] [2021-08-29 11:23:14,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:14,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:14,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:14,677 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:23:14,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 11:23:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-29 11:23:14,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:23:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:14,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:23:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:14,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372220858] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:23:14,886 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:23:14,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2021-08-29 11:23:14,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481269631] [2021-08-29 11:23:14,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 11:23:14,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:14,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 11:23:14,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-08-29 11:23:14,889 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:14,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:14,971 INFO L93 Difference]: Finished difference Result 19 states and 25 transitions. [2021-08-29 11:23:14,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-29 11:23:14,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 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 8 [2021-08-29 11:23:14,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:14,973 INFO L225 Difference]: With dead ends: 19 [2021-08-29 11:23:14,973 INFO L226 Difference]: Without dead ends: 15 [2021-08-29 11:23:14,977 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 84.37ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-08-29 11:23:14,982 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.13ms SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.59ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:14,984 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 49 Unknown, 0 Unchecked, 2.13ms Time], IncrementalHoareTripleChecker [18 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 48.59ms Time] [2021-08-29 11:23:14,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-29 11:23:14,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-29 11:23:14,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 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) [2021-08-29 11:23:14,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-08-29 11:23:14,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 8 [2021-08-29 11:23:14,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:14,994 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-08-29 11:23:14,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:14,995 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-08-29 11:23:14,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 11:23:14,995 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:14,995 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-08-29 11:23:15,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-29 11:23:15,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:15,214 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:15,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:15,215 INFO L82 PathProgramCache]: Analyzing trace with hash 742440183, now seen corresponding path program 1 times [2021-08-29 11:23:15,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:15,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394142668] [2021-08-29 11:23:15,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:15,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:15,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:15,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394142668] [2021-08-29 11:23:15,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394142668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:15,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344093744] [2021-08-29 11:23:15,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:15,301 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:15,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:15,316 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:23:15,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-29 11:23:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:15,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-29 11:23:15,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:23:15,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:15,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:23:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:15,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344093744] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:23:15,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:23:15,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2021-08-29 11:23:15,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678946325] [2021-08-29 11:23:15,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-29 11:23:15,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:15,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-29 11:23:15,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-08-29 11:23:15,535 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:15,630 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2021-08-29 11:23:15,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-29 11:23:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 11:23:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:15,633 INFO L225 Difference]: With dead ends: 29 [2021-08-29 11:23:15,633 INFO L226 Difference]: Without dead ends: 25 [2021-08-29 11:23:15,635 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 87.03ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-08-29 11:23:15,640 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 22 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.82ms SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.59ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:15,641 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 0 Invalid, 90 Unknown, 0 Unchecked, 2.82ms Time], IncrementalHoareTripleChecker [30 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 49.59ms Time] [2021-08-29 11:23:15,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-29 11:23:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 19. [2021-08-29 11:23:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:15,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2021-08-29 11:23:15,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 10 [2021-08-29 11:23:15,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:15,649 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2021-08-29 11:23:15,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:15,649 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2021-08-29 11:23:15,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-29 11:23:15,650 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:15,650 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-08-29 11:23:15,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-29 11:23:15,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-29 11:23:15,877 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:15,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:15,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1714863729, now seen corresponding path program 2 times [2021-08-29 11:23:15,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:15,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182263412] [2021-08-29 11:23:15,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:15,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:15,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:16,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:16,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:16,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182263412] [2021-08-29 11:23:16,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182263412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:16,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963773242] [2021-08-29 11:23:16,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 11:23:16,009 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:16,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:16,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:23:16,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-29 11:23:16,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 11:23:16,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:23:16,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-29 11:23:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:23:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:16,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:23:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:16,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963773242] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:23:16,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:23:16,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-08-29 11:23:16,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663732268] [2021-08-29 11:23:16,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-29 11:23:16,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-29 11:23:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=341, Unknown=0, NotChecked=0, Total=600 [2021-08-29 11:23:16,401 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:16,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:16,594 INFO L93 Difference]: Finished difference Result 61 states and 91 transitions. [2021-08-29 11:23:16,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-29 11:23:16,594 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-29 11:23:16,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:16,595 INFO L225 Difference]: With dead ends: 61 [2021-08-29 11:23:16,595 INFO L226 Difference]: Without dead ends: 57 [2021-08-29 11:23:16,596 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 273.11ms TimeCoverageRelationStatistics Valid=392, Invalid=600, Unknown=0, NotChecked=0, Total=992 [2021-08-29 11:23:16,596 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.70ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 86.48ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:16,596 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 137 Unknown, 0 Unchecked, 2.70ms Time], IncrementalHoareTripleChecker [69 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 86.48ms Time] [2021-08-29 11:23:16,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-29 11:23:16,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 35. [2021-08-29 11:23:16,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 34 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:16,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 49 transitions. [2021-08-29 11:23:16,602 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 49 transitions. Word has length 18 [2021-08-29 11:23:16,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:16,602 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 49 transitions. [2021-08-29 11:23:16,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:16,603 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 49 transitions. [2021-08-29 11:23:16,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-29 11:23:16,603 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:16,603 INFO L513 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1] [2021-08-29 11:23:16,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-29 11:23:16,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:16,817 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:16,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:16,817 INFO L82 PathProgramCache]: Analyzing trace with hash 355037325, now seen corresponding path program 1 times [2021-08-29 11:23:16,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:16,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810793396] [2021-08-29 11:23:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:16,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:16,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:16,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810793396] [2021-08-29 11:23:16,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810793396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:16,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741989346] [2021-08-29 11:23:16,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:16,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:16,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:16,928 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:23:16,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-29 11:23:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-29 11:23:16,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:23:17,171 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:17,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:23:17,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:17,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741989346] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:23:17,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:23:17,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2021-08-29 11:23:17,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107308110] [2021-08-29 11:23:17,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-29 11:23:17,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:17,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-29 11:23:17,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=527, Unknown=0, NotChecked=0, Total=930 [2021-08-29 11:23:17,357 INFO L87 Difference]: Start difference. First operand 35 states and 49 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:17,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:17,630 INFO L93 Difference]: Finished difference Result 119 states and 179 transitions. [2021-08-29 11:23:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-29 11:23:17,631 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 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 22 [2021-08-29 11:23:17,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:17,632 INFO L225 Difference]: With dead ends: 119 [2021-08-29 11:23:17,632 INFO L226 Difference]: Without dead ends: 115 [2021-08-29 11:23:17,633 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 377.73ms TimeCoverageRelationStatistics Valid=610, Invalid=950, Unknown=0, NotChecked=0, Total=1560 [2021-08-29 11:23:17,633 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 41 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 81.69ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 112.02ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:17,633 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 0 Invalid, 201 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [107 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 112.02ms Time] [2021-08-29 11:23:17,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-08-29 11:23:17,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 43. [2021-08-29 11:23:17,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2021-08-29 11:23:17,642 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 22 [2021-08-29 11:23:17,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:17,642 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2021-08-29 11:23:17,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2021-08-29 11:23:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-29 11:23:17,643 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:17,644 INFO L513 BasicCegarLoop]: trace histogram [14, 10, 4, 1, 1, 1, 1, 1, 1] [2021-08-29 11:23:17,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-29 11:23:17,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:17,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:17,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:17,857 INFO L82 PathProgramCache]: Analyzing trace with hash -294996049, now seen corresponding path program 2 times [2021-08-29 11:23:17,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:17,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020116373] [2021-08-29 11:23:17,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:17,858 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:18,076 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:18,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:18,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020116373] [2021-08-29 11:23:18,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020116373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:18,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043308682] [2021-08-29 11:23:18,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-29 11:23:18,077 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:18,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:18,078 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:23:18,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-29 11:23:18,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-29 11:23:18,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:23:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-29 11:23:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:23:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:18,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:23:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:18,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043308682] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:23:18,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:23:18,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 48 [2021-08-29 11:23:18,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384949166] [2021-08-29 11:23:18,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-29 11:23:18,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-29 11:23:18,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=1325, Unknown=0, NotChecked=0, Total=2352 [2021-08-29 11:23:18,854 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:19,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:19,374 INFO L93 Difference]: Finished difference Result 265 states and 401 transitions. [2021-08-29 11:23:19,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-29 11:23:19,376 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-29 11:23:19,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:19,378 INFO L225 Difference]: With dead ends: 265 [2021-08-29 11:23:19,378 INFO L226 Difference]: Without dead ends: 261 [2021-08-29 11:23:19,380 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 874.75ms TimeCoverageRelationStatistics Valid=1552, Invalid=2480, Unknown=0, NotChecked=0, Total=4032 [2021-08-29 11:23:19,380 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 85 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 147.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.32ms SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 183.92ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:19,381 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 0 Invalid, 378 Unknown, 0 Unchecked, 2.32ms Time], IncrementalHoareTripleChecker [243 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 183.92ms Time] [2021-08-29 11:23:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-08-29 11:23:19,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 67. [2021-08-29 11:23:19,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4696969696969697) internal successors, (97), 66 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 97 transitions. [2021-08-29 11:23:19,393 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 97 transitions. Word has length 34 [2021-08-29 11:23:19,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:19,394 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 97 transitions. [2021-08-29 11:23:19,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 97 transitions. [2021-08-29 11:23:19,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-29 11:23:19,395 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:19,395 INFO L513 BasicCegarLoop]: trace histogram [18, 12, 6, 1, 1, 1, 1, 1, 1] [2021-08-29 11:23:19,427 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-29 11:23:19,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:19,608 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:19,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:19,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1645760435, now seen corresponding path program 3 times [2021-08-29 11:23:19,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:19,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110911373] [2021-08-29 11:23:19,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:19,610 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:19,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:19,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:19,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110911373] [2021-08-29 11:23:19,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110911373] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:19,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111595146] [2021-08-29 11:23:19,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-29 11:23:19,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:19,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:19,889 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) [2021-08-29 11:23:19,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-29 11:23:19,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-29 11:23:19,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:23:19,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 21 conjunts are in the unsatisfiable core [2021-08-29 11:23:19,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:23:20,403 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:20,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:23:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:20,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111595146] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-29 11:23:20,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-29 11:23:20,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 60 [2021-08-29 11:23:20,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425900343] [2021-08-29 11:23:20,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-29 11:23:20,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-29 11:23:20,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=2057, Unknown=0, NotChecked=0, Total=3660 [2021-08-29 11:23:20,952 INFO L87 Difference]: Start difference. First operand 67 states and 97 transitions. Second operand has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:21,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:21,690 INFO L93 Difference]: Finished difference Result 509 states and 769 transitions. [2021-08-29 11:23:21,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-29 11:23:21,690 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 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 42 [2021-08-29 11:23:21,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:21,692 INFO L225 Difference]: With dead ends: 509 [2021-08-29 11:23:21,692 INFO L226 Difference]: Without dead ends: 505 [2021-08-29 11:23:21,694 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2201 ImplicationChecksByTransitivity, 1269.95ms TimeCoverageRelationStatistics Valid=2420, Invalid=3900, Unknown=0, NotChecked=0, Total=6320 [2021-08-29 11:23:21,694 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 143 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.65ms SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 225.10ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:21,695 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 0 Invalid, 459 Unknown, 0 Unchecked, 2.65ms Time], IncrementalHoareTripleChecker [295 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 225.10ms Time] [2021-08-29 11:23:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2021-08-29 11:23:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 83. [2021-08-29 11:23:21,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.475609756097561) internal successors, (121), 82 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:21,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 121 transitions. [2021-08-29 11:23:21,714 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 121 transitions. Word has length 42 [2021-08-29 11:23:21,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:21,714 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 121 transitions. [2021-08-29 11:23:21,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:21,715 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 121 transitions. [2021-08-29 11:23:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-08-29 11:23:21,716 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:23:21,716 INFO L513 BasicCegarLoop]: trace histogram [30, 22, 8, 1, 1, 1, 1, 1, 1] [2021-08-29 11:23:21,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-29 11:23:21,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:21,929 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 11:23:21,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:23:21,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1585988105, now seen corresponding path program 4 times [2021-08-29 11:23:21,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:23:21,930 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930560060] [2021-08-29 11:23:21,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:23:21,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:23:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:23:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:22,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 11:23:22,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930560060] [2021-08-29 11:23:22,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930560060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:22,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066631931] [2021-08-29 11:23:22,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-29 11:23:22,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:23:22,454 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-29 11:23:22,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-29 11:23:22,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-29 11:23:22,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-29 11:23:22,500 WARN L261 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 67 conjunts are in the unsatisfiable core [2021-08-29 11:23:22,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:23:23,387 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:23:23,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:23:24,928 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2021-08-29 11:23:24,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066631931] provided 1 perfect and 1 imperfect interpolant sequences [2021-08-29 11:23:24,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-08-29 11:23:24,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [33, 34] total 67 [2021-08-29 11:23:24,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196674063] [2021-08-29 11:23:24,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-29 11:23:24,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 11:23:24,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-29 11:23:24,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=3792, Unknown=0, NotChecked=0, Total=4422 [2021-08-29 11:23:24,931 INFO L87 Difference]: Start difference. First operand 83 states and 121 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:24,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:23:24,988 INFO L93 Difference]: Finished difference Result 83 states and 121 transitions. [2021-08-29 11:23:24,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-29 11:23:24,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-08-29 11:23:24,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:23:24,990 INFO L225 Difference]: With dead ends: 83 [2021-08-29 11:23:24,990 INFO L226 Difference]: Without dead ends: 0 [2021-08-29 11:23:24,992 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 67 SyntacticMatches, 31 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 2409.38ms TimeCoverageRelationStatistics Valid=634, Invalid=3922, Unknown=0, NotChecked=0, Total=4556 [2021-08-29 11:23:24,994 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 1 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.09ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.19ms IncrementalHoareTripleChecker+Time [2021-08-29 11:23:24,994 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 0 Invalid, 14 Unknown, 0 Unchecked, 0.09ms Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 10.19ms Time] [2021-08-29 11:23:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-29 11:23:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-29 11:23:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-29 11:23:24,995 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 66 [2021-08-29 11:23:24,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:23:24,996 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-29 11:23:24,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:23:24,997 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-29 11:23:24,997 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-29 11:23:24,999 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-08-29 11:23:25,026 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-29 11:23:25,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:23:25,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-29 11:23:25,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:23:25,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:23:25,648 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-29 11:23:25,655 INFO L861 garLoopResultBuilder]: At program point L33(lines 20 34) the Hoare annotation is: true [2021-08-29 11:23:25,656 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-29 11:23:25,656 INFO L858 garLoopResultBuilder]: For program point L25(lines 25 28) no Hoare annotation was computed. [2021-08-29 11:23:25,656 INFO L854 garLoopResultBuilder]: At program point L25-2(lines 23 30) the Hoare annotation is: (and (= (* 4 (div ULTIMATE.start_main_~i~0 4)) ULTIMATE.start_main_~i~0) (<= 50000001 ~SIZE~0)) [2021-08-29 11:23:25,656 INFO L858 garLoopResultBuilder]: For program point L23-2(lines 23 30) no Hoare annotation was computed. [2021-08-29 11:23:25,656 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 15) no Hoare annotation was computed. [2021-08-29 11:23:25,656 INFO L861 garLoopResultBuilder]: At program point L13-2(lines 12 17) the Hoare annotation is: true [2021-08-29 11:23:25,656 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-29 11:23:25,657 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-29 11:23:25,657 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-29 11:23:25,657 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-08-29 11:23:25,657 INFO L858 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-08-29 11:23:25,660 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:23:25,671 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:23:25 BoogieIcfgContainer [2021-08-29 11:23:25,671 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:23:25,672 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:23:25,672 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:23:25,672 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:23:25,673 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:23:14" (3/4) ... [2021-08-29 11:23:25,675 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-29 11:23:25,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-08-29 11:23:25,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-08-29 11:23:25,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:23:25,682 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-29 11:23:25,721 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:23:25,722 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:23:25,722 INFO L158 Benchmark]: Toolchain (without parser) took 12113.10ms. Allocated memory was 60.8MB in the beginning and 113.2MB in the end (delta: 52.4MB). Free memory was 39.1MB in the beginning and 41.7MB in the end (delta: -2.5MB). Peak memory consumption was 48.3MB. Max. memory is 16.1GB. [2021-08-29 11:23:25,723 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 60.8MB. Free memory was 41.4MB in the beginning and 41.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:23:25,723 INFO L158 Benchmark]: CACSL2BoogieTranslator took 234.97ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 43.8MB in the end (delta: -4.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 11:23:25,723 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.57ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 42.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:23:25,723 INFO L158 Benchmark]: Boogie Preprocessor took 26.46ms. Allocated memory is still 60.8MB. Free memory was 42.3MB in the beginning and 41.3MB in the end (delta: 970.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:23:25,724 INFO L158 Benchmark]: RCFGBuilder took 212.50ms. Allocated memory is still 60.8MB. Free memory was 41.3MB in the beginning and 33.2MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-08-29 11:23:25,725 INFO L158 Benchmark]: TraceAbstraction took 11555.55ms. Allocated memory was 60.8MB in the beginning and 113.2MB in the end (delta: 52.4MB). Free memory was 32.7MB in the beginning and 44.8MB in the end (delta: -12.0MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2021-08-29 11:23:25,725 INFO L158 Benchmark]: Witness Printer took 49.63ms. Allocated memory is still 113.2MB. Free memory was 43.8MB in the beginning and 41.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:23:25,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 60.8MB. Free memory was 41.4MB in the beginning and 41.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 234.97ms. Allocated memory is still 60.8MB. Free memory was 39.0MB in the beginning and 43.8MB in the end (delta: -4.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.57ms. Allocated memory is still 60.8MB. Free memory was 43.6MB in the beginning and 42.3MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 26.46ms. Allocated memory is still 60.8MB. Free memory was 42.3MB in the beginning and 41.3MB in the end (delta: 970.4kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 212.50ms. Allocated memory is still 60.8MB. Free memory was 41.3MB in the beginning and 33.2MB in the end (delta: 8.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 11555.55ms. Allocated memory was 60.8MB in the beginning and 113.2MB in the end (delta: 52.4MB). Free memory was 32.7MB in the beginning and 44.8MB in the end (delta: -12.0MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. * Witness Printer took 49.63ms. Allocated memory is still 113.2MB. Free memory was 43.8MB in the beginning and 41.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: 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, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11485.95ms, OverallIterations: 9, TraceHistogramMax: 30, EmptinessCheckTime: 14.03ms, AutomataDifference: 2126.87ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 441.24ms, InitialAbstractionConstructionTime: 11.39ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 361 SdHoareTripleChecker+Valid, 755.79ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 361 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 577.84ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 51 mSDsCounter, 764 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 596 IncrementalHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 764 mSolverCounterUnsat, 0 mSDtfsCounter, 596 mSolverCounterSat, 14.91ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 548 GetRequests, 217 SyntacticMatches, 31 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6481 ImplicationChecksByTransitivity, 5386.29ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=83occurred in iteration=8, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 72.79ms AutomataMinimizationTime, 9 MinimizatonAttempts, 717 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.00ms HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 43 NumberOfFragments, 13 HoareAnnotationTreeSize, 3 FomulaSimplifications, 42072 FormulaSimplificationTreeSizeReduction, 432.25ms HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 3.49ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 81.80ms SsaConstructionTime, 318.80ms SatisfiabilityAnalysisTime, 6529.65ms InterpolantComputationTime, 412 NumberOfCodeBlocks, 381 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 589 ConstructedInterpolants, 0 QuantifiedInterpolants, 2851 SizeOfPredicates, 15 NumberOfNonLiveVariables, 729 ConjunctsInSsa, 134 ConjunctsInUnsatCore, 23 InterpolantComputations, 3 PerfectInterpolantSequences, 900/4575 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: 23]: Loop Invariant Derived loop invariant: 4 * (i / 4) == i && 50000001 <= SIZE - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-29 11:23:25,767 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...