./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:07:12,599 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:07:12,601 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:07:12,643 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:07:12,643 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:07:12,645 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:07:12,646 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:07:12,648 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:07:12,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:07:12,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:07:12,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:07:12,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:07:12,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:07:12,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:07:12,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:07:12,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:07:12,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:07:12,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:07:12,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:07:12,674 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:07:12,676 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:07:12,677 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:07:12,678 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:07:12,679 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:07:12,680 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:07:12,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:07:12,687 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:07:12,688 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:07:12,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:07:12,689 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:07:12,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:07:12,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:07:12,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:07:12,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:07:12,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:07:12,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:07:12,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:07:12,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:07:12,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:07:12,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:07:12,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:07:12,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:07:12,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:07:12,729 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:07:12,730 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:07:12,730 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:07:12,730 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:07:12,731 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:07:12,731 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:07:12,732 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:07:12,732 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:07:12,732 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:07:12,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:07:12,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:07:12,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:07:12,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:07:12,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:07:12,734 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:07:12,734 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:07:12,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:07:12,735 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:07:12,735 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:07:12,735 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:07:12,735 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:07:12,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:07:12,736 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:07:12,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:07:12,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:07:12,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:07:12,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:07:12,738 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:07:12,738 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:07:12,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:07:12,739 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:07:12,739 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:07:12,739 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:07:12,739 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 001066cca5a67e3c9af1d254dd4dcabba7e6cff5ea24a6e35ddcc570894db37c [2022-07-22 09:07:12,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:07:12,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:07:12,988 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:07:12,989 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:07:12,990 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:07:12,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2022-07-22 09:07:13,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3ea48cb7/866eef4f44b245aa8876a2e450b05aea/FLAG94e5c7043 [2022-07-22 09:07:13,496 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:07:13,496 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i [2022-07-22 09:07:13,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3ea48cb7/866eef4f44b245aa8876a2e450b05aea/FLAG94e5c7043 [2022-07-22 09:07:13,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d3ea48cb7/866eef4f44b245aa8876a2e450b05aea [2022-07-22 09:07:13,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:07:13,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:07:13,888 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:07:13,889 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:07:13,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:07:13,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:07:13" (1/1) ... [2022-07-22 09:07:13,894 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@460c6d04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:13, skipping insertion in model container [2022-07-22 09:07:13,895 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:07:13" (1/1) ... [2022-07-22 09:07:13,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:07:13,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:07:14,043 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2022-07-22 09:07:14,059 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:07:14,065 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:07:14,076 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-1.i[816,829] [2022-07-22 09:07:14,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:07:14,095 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:07:14,095 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14 WrapperNode [2022-07-22 09:07:14,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:07:14,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:07:14,097 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:07:14,097 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:07:14,108 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,116 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,133 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-07-22 09:07:14,134 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:07:14,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:07:14,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:07:14,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:07:14,143 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,145 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,154 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,157 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:07:14,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:07:14,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:07:14,158 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:07:14,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (1/1) ... [2022-07-22 09:07:14,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:07:14,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:07:14,193 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) [2022-07-22 09:07:14,201 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 [2022-07-22 09:07:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:07:14,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:07:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:07:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:07:14,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:07:14,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:07:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:07:14,234 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:07:14,285 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:07:14,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:07:14,417 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:07:14,422 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:07:14,423 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 09:07:14,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:07:14 BoogieIcfgContainer [2022-07-22 09:07:14,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:07:14,438 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:07:14,438 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:07:14,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:07:14,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:07:13" (1/3) ... [2022-07-22 09:07:14,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b05d187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:07:14, skipping insertion in model container [2022-07-22 09:07:14,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:07:14" (2/3) ... [2022-07-22 09:07:14,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b05d187 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:07:14, skipping insertion in model container [2022-07-22 09:07:14,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:07:14" (3/3) ... [2022-07-22 09:07:14,445 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-1.i [2022-07-22 09:07:14,466 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:07:14,471 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:07:14,540 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:07:14,546 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@76afc544, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@64b0508d [2022-07-22 09:07:14,547 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:07:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-22 09:07:14,557 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:07:14,558 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:07:14,558 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:07:14,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:07:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2022-07-22 09:07:14,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:07:14,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257672519] [2022-07-22 09:07:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:14,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:07:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:14,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:07:14,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:07:14,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257672519] [2022-07-22 09:07:14,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257672519] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:07:14,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:07:14,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:07:14,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585779663] [2022-07-22 09:07:14,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:07:14,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:07:14,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:07:14,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:07:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:07:14,792 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:07:14,835 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2022-07-22 09:07:14,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:07:14,842 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-22 09:07:14,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:07:14,849 INFO L225 Difference]: With dead ends: 40 [2022-07-22 09:07:14,850 INFO L226 Difference]: Without dead ends: 19 [2022-07-22 09:07:14,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:07:14,866 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:07:14,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:07:14,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-22 09:07:14,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2022-07-22 09:07:14,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:14,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2022-07-22 09:07:14,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2022-07-22 09:07:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:07:14,905 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2022-07-22 09:07:14,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:14,906 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2022-07-22 09:07:14,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 09:07:14,907 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:07:14,907 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:07:14,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:07:14,908 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:07:14,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:07:14,909 INFO L85 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2022-07-22 09:07:14,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:07:14,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560897234] [2022-07-22 09:07:14,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:14,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:07:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:07:14,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:07:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560897234] [2022-07-22 09:07:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560897234] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:07:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069057447] [2022-07-22 09:07:14,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:15,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:07:15,023 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) [2022-07-22 09:07:15,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 09:07:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:15,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 09:07:15,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:07:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 09:07:15,117 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 09:07:15,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069057447] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:07:15,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 09:07:15,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-07-22 09:07:15,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554130037] [2022-07-22 09:07:15,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:07:15,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:07:15,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:07:15,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:07:15,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:07:15,121 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:07:15,140 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-07-22 09:07:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:07:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 09:07:15,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:07:15,142 INFO L225 Difference]: With dead ends: 32 [2022-07-22 09:07:15,142 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 09:07:15,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:07:15,143 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:07:15,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:07:15,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 09:07:15,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2022-07-22 09:07:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2022-07-22 09:07:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-07-22 09:07:15,148 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2022-07-22 09:07:15,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:07:15,149 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-07-22 09:07:15,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:15,149 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-07-22 09:07:15,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 09:07:15,150 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:07:15,150 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:07:15,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 09:07:15,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:15,366 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:07:15,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:07:15,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2022-07-22 09:07:15,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:07:15,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638582128] [2022-07-22 09:07:15,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:15,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:07:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:07:15,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:07:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638582128] [2022-07-22 09:07:15,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638582128] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:07:15,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49727178] [2022-07-22 09:07:15,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:15,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:15,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:07:15,455 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) [2022-07-22 09:07:15,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 09:07:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:15,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:07:15,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:07:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:07:15,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:07:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 09:07:15,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49727178] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:07:15,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:07:15,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:07:15,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74673627] [2022-07-22 09:07:15,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:07:15,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:07:15,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:07:15,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:07:15,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:07:15,625 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:15,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:07:15,671 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2022-07-22 09:07:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:07:15,673 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-22 09:07:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:07:15,674 INFO L225 Difference]: With dead ends: 41 [2022-07-22 09:07:15,674 INFO L226 Difference]: Without dead ends: 26 [2022-07-22 09:07:15,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:07:15,676 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 6 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:07:15,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:07:15,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-07-22 09:07:15,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-07-22 09:07:15,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:15,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2022-07-22 09:07:15,681 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2022-07-22 09:07:15,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:07:15,682 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2022-07-22 09:07:15,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:15,682 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2022-07-22 09:07:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 09:07:15,683 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:07:15,684 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:07:15,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 09:07:15,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-22 09:07:15,886 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:07:15,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:07:15,886 INFO L85 PathProgramCache]: Analyzing trace with hash 862458255, now seen corresponding path program 2 times [2022-07-22 09:07:15,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:07:15,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936904371] [2022-07-22 09:07:15,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:15,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:07:15,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 09:07:15,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:07:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936904371] [2022-07-22 09:07:15,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936904371] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:07:15,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839864893] [2022-07-22 09:07:15,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:07:15,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:15,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:07:16,001 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 09:07:16,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 09:07:16,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:07:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:07:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 09:07:16,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:07:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 09:07:16,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:07:16,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-22 09:07:16,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839864893] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:07:16,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:07:16,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-22 09:07:16,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767099767] [2022-07-22 09:07:16,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:07:16,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 09:07:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:07:16,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 09:07:16,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:07:16,109 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:16,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:07:16,152 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2022-07-22 09:07:16,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 09:07:16,153 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-22 09:07:16,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:07:16,154 INFO L225 Difference]: With dead ends: 49 [2022-07-22 09:07:16,154 INFO L226 Difference]: Without dead ends: 38 [2022-07-22 09:07:16,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-22 09:07:16,155 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:07:16,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:07:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-07-22 09:07:16,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-07-22 09:07:16,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:16,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-07-22 09:07:16,162 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2022-07-22 09:07:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:07:16,171 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-07-22 09:07:16,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:16,173 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-07-22 09:07:16,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 09:07:16,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:07:16,175 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:07:16,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 09:07:16,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:16,400 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:07:16,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:07:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1441156285, now seen corresponding path program 3 times [2022-07-22 09:07:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:07:16,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565518295] [2022-07-22 09:07:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:07:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:07:16,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:07:16,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565518295] [2022-07-22 09:07:16,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565518295] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:07:16,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062381673] [2022-07-22 09:07:16,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:07:16,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:16,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:07:16,522 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) [2022-07-22 09:07:16,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 09:07:16,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 09:07:16,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:07:16,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 09:07:16,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:07:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:07:16,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:07:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:07:16,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062381673] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:07:16,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:07:16,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-22 09:07:16,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136396013] [2022-07-22 09:07:16,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:07:16,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:07:16,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:07:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:07:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:07:16,737 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2022-07-22 09:07:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:07:16,776 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-07-22 09:07:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 09:07:16,776 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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 35 [2022-07-22 09:07:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:07:16,777 INFO L225 Difference]: With dead ends: 77 [2022-07-22 09:07:16,777 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 09:07:16,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:07:16,779 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:07:16,779 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 50 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:07:16,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 09:07:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-07-22 09:07:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 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) [2022-07-22 09:07:16,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-07-22 09:07:16,785 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2022-07-22 09:07:16,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:07:16,785 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-07-22 09:07:16,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 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) [2022-07-22 09:07:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-07-22 09:07:16,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 09:07:16,787 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:07:16,787 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:07:16,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-22 09:07:17,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:17,013 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:07:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:07:17,013 INFO L85 PathProgramCache]: Analyzing trace with hash -100034249, now seen corresponding path program 4 times [2022-07-22 09:07:17,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:07:17,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244004682] [2022-07-22 09:07:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:17,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:07:17,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:07:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:07:17,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244004682] [2022-07-22 09:07:17,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244004682] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:07:17,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972253181] [2022-07-22 09:07:17,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:07:17,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:17,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:07:17,189 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) [2022-07-22 09:07:17,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 09:07:17,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:07:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:07:17,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:07:17,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:07:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:07:17,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:07:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:07:17,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972253181] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:07:17,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:07:17,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2022-07-22 09:07:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385666041] [2022-07-22 09:07:17,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:07:17,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 09:07:17,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:07:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 09:07:17,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:07:17,584 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 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) [2022-07-22 09:07:17,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:07:17,682 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2022-07-22 09:07:17,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:07:17,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 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 47 [2022-07-22 09:07:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:07:17,685 INFO L225 Difference]: With dead ends: 101 [2022-07-22 09:07:17,685 INFO L226 Difference]: Without dead ends: 74 [2022-07-22 09:07:17,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-07-22 09:07:17,688 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:07:17,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 66 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:07:17,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-22 09:07:17,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-07-22 09:07:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:07:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-07-22 09:07:17,708 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 47 [2022-07-22 09:07:17,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:07:17,708 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-07-22 09:07:17,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 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) [2022-07-22 09:07:17,709 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-07-22 09:07:17,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 09:07:17,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:07:17,712 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:07:17,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 09:07:17,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:17,936 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:07:17,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:07:17,936 INFO L85 PathProgramCache]: Analyzing trace with hash -888767713, now seen corresponding path program 5 times [2022-07-22 09:07:17,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:07:17,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154145345] [2022-07-22 09:07:17,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:07:17,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:07:18,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:07:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-22 09:07:18,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:07:18,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154145345] [2022-07-22 09:07:18,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154145345] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:07:18,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274939891] [2022-07-22 09:07:18,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:07:18,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:07:18,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:07:18,398 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) [2022-07-22 09:07:18,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process