./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/tree-4.i --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/heap-manipulation/tree-4.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 925bf64e647f08edad293233522d90c39c43645d ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 08:54:46,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 08:54:46,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 08:54:46,662 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 08:54:46,662 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 08:54:46,665 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 08:54:46,666 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 08:54:46,670 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 08:54:46,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 08:54:46,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 08:54:46,675 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 08:54:46,678 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 08:54:46,678 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 08:54:46,680 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 08:54:46,681 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 08:54:46,682 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 08:54:46,683 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 08:54:46,683 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 08:54:46,686 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 08:54:46,690 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 08:54:46,691 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 08:54:46,692 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 08:54:46,693 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 08:54:46,693 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 08:54:46,697 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 08:54:46,697 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 08:54:46,697 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 08:54:46,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 08:54:46,698 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 08:54:46,699 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 08:54:46,699 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 08:54:46,700 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 08:54:46,701 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 08:54:46,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 08:54:46,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 08:54:46,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 08:54:46,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 08:54:46,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 08:54:46,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 08:54:46,704 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 08:54:46,705 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 08:54:46,705 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 08:54:46,734 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 08:54:46,734 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 08:54:46,735 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 08:54:46,735 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 08:54:46,736 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 08:54:46,736 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 08:54:46,736 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 08:54:46,737 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 08:54:46,737 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 08:54:46,737 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 08:54:46,737 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 08:54:46,738 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 08:54:46,738 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 08:54:46,738 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 08:54:46,738 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 08:54:46,738 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 08:54:46,749 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 08:54:46,749 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 08:54:46,749 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 08:54:46,750 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 08:54:46,750 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 08:54:46,750 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 08:54:46,750 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 08:54:46,750 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 925bf64e647f08edad293233522d90c39c43645d [2021-08-29 08:54:46,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 08:54:46,981 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 08:54:46,983 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 08:54:46,983 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 08:54:46,984 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 08:54:46,985 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/tree-4.i [2021-08-29 08:54:47,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dbce6eef/f08f489b69d6434b8161603b737ec4bc/FLAG6fc1fe554 [2021-08-29 08:54:47,437 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 08:54:47,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/tree-4.i [2021-08-29 08:54:47,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dbce6eef/f08f489b69d6434b8161603b737ec4bc/FLAG6fc1fe554 [2021-08-29 08:54:47,459 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1dbce6eef/f08f489b69d6434b8161603b737ec4bc [2021-08-29 08:54:47,461 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 08:54:47,462 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 08:54:47,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 08:54:47,464 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 08:54:47,466 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 08:54:47,467 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fc7c5ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47, skipping insertion in model container [2021-08-29 08:54:47,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 08:54:47,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 08:54:47,687 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/heap-manipulation/tree-4.i[22626,22639] [2021-08-29 08:54:47,699 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 08:54:47,708 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 08:54:47,739 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/heap-manipulation/tree-4.i[22626,22639] [2021-08-29 08:54:47,746 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 08:54:47,763 INFO L208 MainTranslator]: Completed translation [2021-08-29 08:54:47,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47 WrapperNode [2021-08-29 08:54:47,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 08:54:47,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 08:54:47,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 08:54:47,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 08:54:47,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,791 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 08:54:47,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 08:54:47,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 08:54:47,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 08:54:47,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,800 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,808 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,809 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,811 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 08:54:47,812 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 08:54:47,812 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 08:54:47,812 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 08:54:47,812 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (1/1) ... [2021-08-29 08:54:47,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 08:54:47,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 08:54:47,830 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 08:54:47,841 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 08:54:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-29 08:54:47,863 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-29 08:54:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-29 08:54:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-29 08:54:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 08:54:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-29 08:54:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-29 08:54:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 08:54:47,865 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 08:54:47,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 08:54:48,076 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 08:54:48,077 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-08-29 08:54:48,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:54:48 BoogieIcfgContainer [2021-08-29 08:54:48,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 08:54:48,085 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 08:54:48,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 08:54:48,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 08:54:48,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 08:54:47" (1/3) ... [2021-08-29 08:54:48,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b33dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:54:48, skipping insertion in model container [2021-08-29 08:54:48,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 08:54:47" (2/3) ... [2021-08-29 08:54:48,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17b33dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 08:54:48, skipping insertion in model container [2021-08-29 08:54:48,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:54:48" (3/3) ... [2021-08-29 08:54:48,089 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-4.i [2021-08-29 08:54:48,092 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 08:54:48,092 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-29 08:54:48,131 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 08:54:48,137 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 08:54:48,137 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-29 08:54:48,147 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 44 states have internal predecessors, (72), 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 08:54:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-29 08:54:48,160 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:54:48,160 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:54:48,160 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:54:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:54:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash 312817904, now seen corresponding path program 1 times [2021-08-29 08:54:48,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:54:48,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696405580] [2021-08-29 08:54:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:54:48,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:54:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:54:48,263 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 08:54:48,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:54:48,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696405580] [2021-08-29 08:54:48,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696405580] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:54:48,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:54:48,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-29 08:54:48,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700583349] [2021-08-29 08:54:48,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-29 08:54:48,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:54:48,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-29 08:54:48,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 08:54:48,295 INFO L87 Difference]: Start difference. First operand has 45 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 44 states have internal predecessors, (72), 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 5.0) internal successors, (10), 2 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 08:54:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:54:48,419 INFO L93 Difference]: Finished difference Result 88 states and 142 transitions. [2021-08-29 08:54:48,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-29 08:54:48,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-29 08:54:48,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:54:48,426 INFO L225 Difference]: With dead ends: 88 [2021-08-29 08:54:48,426 INFO L226 Difference]: Without dead ends: 32 [2021-08-29 08:54:48,428 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.02ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-29 08:54:48,430 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 88.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.43ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 110.90ms IncrementalHoareTripleChecker+Time [2021-08-29 08:54:48,430 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 55 Unknown, 0 Unchecked, 0.43ms Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 110.90ms Time] [2021-08-29 08:54:48,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-29 08:54:48,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-29 08:54:48,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 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 08:54:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2021-08-29 08:54:48,450 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 10 [2021-08-29 08:54:48,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:54:48,450 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2021-08-29 08:54:48,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 08:54:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2021-08-29 08:54:48,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 08:54:48,451 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:54:48,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:54:48,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-29 08:54:48,452 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:54:48,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:54:48,453 INFO L82 PathProgramCache]: Analyzing trace with hash -222248370, now seen corresponding path program 1 times [2021-08-29 08:54:48,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:54:48,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922184264] [2021-08-29 08:54:48,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:54:48,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:54:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:54:48,516 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 08:54:48,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:54:48,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922184264] [2021-08-29 08:54:48,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922184264] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:54:48,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:54:48,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 08:54:48,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809763457] [2021-08-29 08:54:48,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 08:54:48,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:54:48,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 08:54:48,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 08:54:48,519 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. 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) [2021-08-29 08:54:48,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:54:48,625 INFO L93 Difference]: Finished difference Result 59 states and 69 transitions. [2021-08-29 08:54:48,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 08:54:48,625 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 [2021-08-29 08:54:48,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:54:48,626 INFO L225 Difference]: With dead ends: 59 [2021-08-29 08:54:48,626 INFO L226 Difference]: Without dead ends: 36 [2021-08-29 08:54:48,629 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.95ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 08:54:48,630 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 23 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.79ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.08ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.19ms IncrementalHoareTripleChecker+Time [2021-08-29 08:54:48,631 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 0 Invalid, 53 Unknown, 0 Unchecked, 1.08ms Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 98.19ms Time] [2021-08-29 08:54:48,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-29 08:54:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-29 08:54:48,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 35 states have internal predecessors, (42), 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 08:54:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2021-08-29 08:54:48,641 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 11 [2021-08-29 08:54:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:54:48,642 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2021-08-29 08:54:48,642 INFO L471 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) [2021-08-29 08:54:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2021-08-29 08:54:48,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-29 08:54:48,643 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:54:48,643 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:54:48,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-29 08:54:48,643 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:54:48,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:54:48,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1552758992, now seen corresponding path program 1 times [2021-08-29 08:54:48,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:54:48,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922022306] [2021-08-29 08:54:48,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:54:48,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:54:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:54:48,709 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 08:54:48,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:54:48,709 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922022306] [2021-08-29 08:54:48,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922022306] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:54:48,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:54:48,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-29 08:54:48,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531346855] [2021-08-29 08:54:48,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-29 08:54:48,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:54:48,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-29 08:54:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-29 08:54:48,718 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:54:48,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:54:48,915 INFO L93 Difference]: Finished difference Result 75 states and 87 transitions. [2021-08-29 08:54:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-29 08:54:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-29 08:54:48,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:54:48,916 INFO L225 Difference]: With dead ends: 75 [2021-08-29 08:54:48,916 INFO L226 Difference]: Without dead ends: 39 [2021-08-29 08:54:48,916 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.61ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-29 08:54:48,917 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 132.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.55ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.85ms IncrementalHoareTripleChecker+Time [2021-08-29 08:54:48,917 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 148 Unknown, 0 Unchecked, 1.55ms Time], IncrementalHoareTripleChecker [2 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 160.85ms Time] [2021-08-29 08:54:48,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-29 08:54:48,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-08-29 08:54:48,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 37 states have internal predecessors, (43), 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 08:54:48,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-08-29 08:54:48,921 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 11 [2021-08-29 08:54:48,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:54:48,921 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-08-29 08:54:48,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:54:48,921 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-08-29 08:54:48,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-29 08:54:48,926 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:54:48,926 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:54:48,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-29 08:54:48,926 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:54:48,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:54:48,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1017108571, now seen corresponding path program 1 times [2021-08-29 08:54:48,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:54:48,927 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331674357] [2021-08-29 08:54:48,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:54:48,927 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:54:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:54:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:54:48,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:54:48,969 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331674357] [2021-08-29 08:54:48,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331674357] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:54:48,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:54:48,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-29 08:54:48,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603393781] [2021-08-29 08:54:48,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-29 08:54:48,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:54:48,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-29 08:54:48,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 08:54:48,970 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:54:49,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:54:49,082 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2021-08-29 08:54:49,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-29 08:54:49,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-29 08:54:49,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:54:49,083 INFO L225 Difference]: With dead ends: 61 [2021-08-29 08:54:49,083 INFO L226 Difference]: Without dead ends: 40 [2021-08-29 08:54:49,083 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.37ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-29 08:54:49,084 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 3 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.17ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.41ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 108.10ms IncrementalHoareTripleChecker+Time [2021-08-29 08:54:49,084 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 0 Invalid, 67 Unknown, 0 Unchecked, 0.41ms Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 108.10ms Time] [2021-08-29 08:54:49,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-29 08:54:49,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-08-29 08:54:49,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 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 08:54:49,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-08-29 08:54:49,087 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 17 [2021-08-29 08:54:49,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:54:49,087 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-08-29 08:54:49,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:54:49,087 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-08-29 08:54:49,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-29 08:54:49,088 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:54:49,088 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:54:49,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-29 08:54:49,088 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:54:49,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:54:49,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1805962768, now seen corresponding path program 1 times [2021-08-29 08:54:49,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:54:49,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444094589] [2021-08-29 08:54:49,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:54:49,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:54:49,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:54:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-29 08:54:49,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:54:49,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444094589] [2021-08-29 08:54:49,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444094589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-29 08:54:49,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-29 08:54:49,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-29 08:54:49,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538475908] [2021-08-29 08:54:49,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 08:54:49,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:54:49,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 08:54:49,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-29 08:54:49,199 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:54:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:54:49,355 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-08-29 08:54:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 08:54:49,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-29 08:54:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:54:49,357 INFO L225 Difference]: With dead ends: 83 [2021-08-29 08:54:49,357 INFO L226 Difference]: Without dead ends: 52 [2021-08-29 08:54:49,357 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 46.37ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-29 08:54:49,358 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 119 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 107.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.48ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 127.37ms IncrementalHoareTripleChecker+Time [2021-08-29 08:54:49,358 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 0 Invalid, 153 Unknown, 0 Unchecked, 1.48ms Time], IncrementalHoareTripleChecker [4 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 127.37ms Time] [2021-08-29 08:54:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-29 08:54:49,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 36. [2021-08-29 08:54:49,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 35 states have internal predecessors, (39), 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 08:54:49,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2021-08-29 08:54:49,361 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 20 [2021-08-29 08:54:49,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:54:49,361 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2021-08-29 08:54:49,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 08:54:49,361 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2021-08-29 08:54:49,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-29 08:54:49,362 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:54:49,362 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:54:49,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-29 08:54:49,362 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:54:49,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:54:49,362 INFO L82 PathProgramCache]: Analyzing trace with hash 748807405, now seen corresponding path program 1 times [2021-08-29 08:54:49,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:54:49,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876971943] [2021-08-29 08:54:49,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:54:49,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:54:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:54:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:54:49,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:54:49,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876971943] [2021-08-29 08:54:49,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876971943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 08:54:49,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821349159] [2021-08-29 08:54:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:54:49,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 08:54:49,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 08:54:49,613 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 08:54:49,644 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 08:54:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:54:49,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-29 08:54:49,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 08:54:49,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-29 08:54:49,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-08-29 08:54:49,874 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-29 08:54:49,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-08-29 08:54:50,188 INFO L354 Elim1Store]: treesize reduction 1366, result has 7.9 percent of original size [2021-08-29 08:54:50,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 2305 treesize of output 799 [2021-08-29 08:54:50,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1919 treesize of output 1535 [2021-08-29 08:54:50,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1437 treesize of output 1433 [2021-08-29 08:54:50,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:54:50,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:54:50,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 175 treesize of output 127 [2021-08-29 08:54:50,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:54:50,449 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-08-29 08:54:50,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 150 [2021-08-29 08:54:50,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:54:50,585 INFO L354 Elim1Store]: treesize reduction 20, result has 71.0 percent of original size [2021-08-29 08:54:50,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 275 treesize of output 273 [2021-08-29 08:54:52,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:54:52,262 INFO L354 Elim1Store]: treesize reduction 150, result has 26.1 percent of original size [2021-08-29 08:54:52,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 72 treesize of output 87 [2021-08-29 08:54:52,301 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-08-29 08:54:52,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 116 treesize of output 71 [2021-08-29 08:54:53,077 INFO L354 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2021-08-29 08:54:53,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 73 treesize of output 56 [2021-08-29 08:54:53,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:54:53,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 08:54:53,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13829 treesize of output 11413 [2021-08-29 08:54:53,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5687 treesize of output 5671 [2021-08-29 08:54:53,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5699 treesize of output 5683 [2021-08-29 08:55:23,226 WARN L210 SmtUtils]: Spent 28.53s on a formula simplification. DAG size of input: 129 DAG size of output: 103 [2021-08-29 08:55:23,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 08:55:23,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-29 08:55:23,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-08-29 08:55:23,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489107334] [2021-08-29 08:55:23,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-29 08:55:23,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:55:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-29 08:55:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-29 08:55:23,484 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 08:55:23,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:55:23,908 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2021-08-29 08:55:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-29 08:55:23,908 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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) Word has length 25 [2021-08-29 08:55:23,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:55:23,909 INFO L225 Difference]: With dead ends: 85 [2021-08-29 08:55:23,909 INFO L226 Difference]: Without dead ends: 72 [2021-08-29 08:55:23,909 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 30177.78ms TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-08-29 08:55:23,909 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 107 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 186.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.58ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 226.10ms IncrementalHoareTripleChecker+Time [2021-08-29 08:55:23,910 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 0 Invalid, 304 Unknown, 0 Unchecked, 1.58ms Time], IncrementalHoareTripleChecker [11 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 226.10ms Time] [2021-08-29 08:55:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-29 08:55:23,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2021-08-29 08:55:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 45 states have internal predecessors, (50), 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 08:55:23,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-08-29 08:55:23,921 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 25 [2021-08-29 08:55:23,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:55:23,922 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-08-29 08:55:23,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 10 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 08:55:23,922 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-08-29 08:55:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-29 08:55:23,922 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:55:23,922 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:55:23,941 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 08:55:24,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-29 08:55:24,124 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:55:24,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:55:24,125 INFO L82 PathProgramCache]: Analyzing trace with hash 748099373, now seen corresponding path program 1 times [2021-08-29 08:55:24,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:55:24,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53427181] [2021-08-29 08:55:24,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:55:24,125 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:55:24,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:55:24,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:55:24,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-29 08:55:24,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53427181] [2021-08-29 08:55:24,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53427181] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-29 08:55:24,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477087221] [2021-08-29 08:55:24,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:55:24,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 08:55:24,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 08:55:24,351 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 08:55:24,363 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 08:55:24,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 08:55:24,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-29 08:55:24,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 08:55:24,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-29 08:55:24,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-29 08:55:24,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-08-29 08:55:24,494 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-29 08:55:24,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-08-29 08:55:25,068 INFO L354 Elim1Store]: treesize reduction 1382, result has 6.8 percent of original size [2021-08-29 08:55:25,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 9 new quantified variables, introduced 12 case distinctions, treesize of input 6410 treesize of output 3812 [2021-08-29 08:55:25,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,174 INFO L354 Elim1Store]: treesize reduction 2692, result has 12.9 percent of original size [2021-08-29 08:55:26,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 16 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 20 new quantified variables, introduced 44 case distinctions, treesize of input 12485 treesize of output 7920 [2021-08-29 08:55:26,361 INFO L354 Elim1Store]: treesize reduction 292, result has 14.4 percent of original size [2021-08-29 08:55:26,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 9002 treesize of output 6790 [2021-08-29 08:55:26,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:26,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 25 [2021-08-29 08:55:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:26,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 21 [2021-08-29 08:55:26,687 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-29 08:55:26,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 4056 treesize of output 3138 [2021-08-29 08:55:26,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,739 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-29 08:55:26,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 4006 treesize of output 3970 [2021-08-29 08:55:26,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,772 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-29 08:55:26,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 3944 treesize of output 3904 [2021-08-29 08:55:26,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:26,804 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-29 08:55:26,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 3874 treesize of output 3834 [2021-08-29 08:55:27,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 21 [2021-08-29 08:55:27,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 21 [2021-08-29 08:55:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 21 [2021-08-29 08:55:27,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 27 [2021-08-29 08:55:27,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,612 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 31 [2021-08-29 08:55:27,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 21 [2021-08-29 08:55:27,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 25 [2021-08-29 08:55:27,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 57 treesize of output 27 [2021-08-29 08:55:27,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 31 [2021-08-29 08:55:27,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 25 [2021-08-29 08:55:27,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,696 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 63 treesize of output 27 [2021-08-29 08:55:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,709 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-29 08:55:27,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 312 treesize of output 272 [2021-08-29 08:55:27,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,717 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-29 08:55:27,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 246 treesize of output 186 [2021-08-29 08:55:27,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,754 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-29 08:55:27,779 INFO L354 Elim1Store]: treesize reduction 152, result has 27.3 percent of original size [2021-08-29 08:55:27,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 141 [2021-08-29 08:55:27,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-29 08:55:27,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 65 treesize of output 31 [2021-08-29 08:55:27,814 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-29 08:55:27,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 3 case distinctions, treesize of input 217 treesize of output 143 [2021-08-29 08:55:27,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:27,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 21 [2021-08-29 08:55:28,172 INFO L354 Elim1Store]: treesize reduction 108, result has 0.9 percent of original size [2021-08-29 08:55:28,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 148 treesize of output 87 [2021-08-29 08:55:28,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 55 [2021-08-29 08:55:28,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 08:55:28,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 08:55:28,349 INFO L354 Elim1Store]: treesize reduction 550, result has 49.3 percent of original size [2021-08-29 08:55:28,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 2666 treesize of output 2384 [2021-08-29 08:55:28,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-29 08:55:28,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 8180 treesize of output 8183 [2021-08-29 08:55:49,465 WARN L210 SmtUtils]: Spent 11.41s on a formula simplification. DAG size of input: 72 DAG size of output: 68 [2021-08-29 08:55:49,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-29 08:55:49,506 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-29 08:55:49,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-29 08:55:49,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475977592] [2021-08-29 08:55:49,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-29 08:55:49,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-29 08:55:49,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-29 08:55:49,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=326, Unknown=1, NotChecked=0, Total=380 [2021-08-29 08:55:49,508 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 08:55:50,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 08:55:50,003 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-08-29 08:55:50,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-29 08:55:50,004 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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) Word has length 25 [2021-08-29 08:55:50,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 08:55:50,004 INFO L225 Difference]: With dead ends: 70 [2021-08-29 08:55:50,004 INFO L226 Difference]: Without dead ends: 68 [2021-08-29 08:55:50,005 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 21433.76ms TimeCoverageRelationStatistics Valid=114, Invalid=535, Unknown=1, NotChecked=0, Total=650 [2021-08-29 08:55:50,005 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 92 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 254.47ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.56ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 289.34ms IncrementalHoareTripleChecker+Time [2021-08-29 08:55:50,006 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 0 Invalid, 368 Unknown, 0 Unchecked, 1.56ms Time], IncrementalHoareTripleChecker [11 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 289.34ms Time] [2021-08-29 08:55:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-29 08:55:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2021-08-29 08:55:50,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 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 08:55:50,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-08-29 08:55:50,009 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 25 [2021-08-29 08:55:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 08:55:50,009 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-08-29 08:55:50,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 08:55:50,010 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-08-29 08:55:50,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-29 08:55:50,010 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 08:55:50,010 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 08:55:50,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-29 08:55:50,222 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,SelfDestructingSolverStorable6 [2021-08-29 08:55:50,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-29 08:55:50,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 08:55:50,223 INFO L82 PathProgramCache]: Analyzing trace with hash 49019818, now seen corresponding path program 1 times [2021-08-29 08:55:50,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 08:55:50,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785294179] [2021-08-29 08:55:50,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 08:55:50,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 08:55:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 08:55:50,242 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 08:55:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 08:55:50,272 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 08:55:50,272 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 08:55:50,273 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-08-29 08:55:50,274 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-08-29 08:55:50,274 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-08-29 08:55:50,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-29 08:55:50,278 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 08:55:50,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 08:55:50 BoogieIcfgContainer [2021-08-29 08:55:50,297 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 08:55:50,298 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 08:55:50,298 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 08:55:50,298 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 08:55:50,298 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 08:54:48" (3/4) ... [2021-08-29 08:55:50,299 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 08:55:50,338 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 08:55:50,338 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 08:55:50,339 INFO L158 Benchmark]: Toolchain (without parser) took 62876.52ms. Allocated memory was 62.9MB in the beginning and 161.5MB in the end (delta: 98.6MB). Free memory was 41.5MB in the beginning and 74.7MB in the end (delta: -33.3MB). Peak memory consumption was 63.6MB. Max. memory is 16.1GB. [2021-08-29 08:55:50,339 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 44.3MB in the beginning and 44.3MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 08:55:50,339 INFO L158 Benchmark]: CACSL2BoogieTranslator took 299.94ms. Allocated memory is still 62.9MB. Free memory was 41.2MB in the beginning and 38.9MB in the end (delta: 2.3MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2021-08-29 08:55:50,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.80ms. Allocated memory is still 62.9MB. Free memory was 38.9MB in the beginning and 36.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 08:55:50,339 INFO L158 Benchmark]: Boogie Preprocessor took 19.50ms. Allocated memory is still 62.9MB. Free memory was 36.6MB in the beginning and 34.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 08:55:50,340 INFO L158 Benchmark]: RCFGBuilder took 272.94ms. Allocated memory is still 62.9MB. Free memory was 34.7MB in the beginning and 41.0MB in the end (delta: -6.3MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. [2021-08-29 08:55:50,340 INFO L158 Benchmark]: TraceAbstraction took 62211.79ms. Allocated memory was 62.9MB in the beginning and 161.5MB in the end (delta: 98.6MB). Free memory was 40.7MB in the beginning and 77.9MB in the end (delta: -37.2MB). Peak memory consumption was 61.8MB. Max. memory is 16.1GB. [2021-08-29 08:55:50,340 INFO L158 Benchmark]: Witness Printer took 40.56ms. Allocated memory is still 161.5MB. Free memory was 77.9MB in the beginning and 74.7MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 08:55:50,341 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 62.9MB. Free memory was 44.3MB in the beginning and 44.3MB in the end (delta: 48.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 299.94ms. Allocated memory is still 62.9MB. Free memory was 41.2MB in the beginning and 38.9MB in the end (delta: 2.3MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.80ms. Allocated memory is still 62.9MB. Free memory was 38.9MB in the beginning and 36.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 19.50ms. Allocated memory is still 62.9MB. Free memory was 36.6MB in the beginning and 34.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 272.94ms. Allocated memory is still 62.9MB. Free memory was 34.7MB in the beginning and 41.0MB in the end (delta: -6.3MB). Peak memory consumption was 15.4MB. Max. memory is 16.1GB. * TraceAbstraction took 62211.79ms. Allocated memory was 62.9MB in the beginning and 161.5MB in the end (delta: 98.6MB). Free memory was 40.7MB in the beginning and 77.9MB in the end (delta: -37.2MB). Peak memory consumption was 61.8MB. Max. memory is 16.1GB. * Witness Printer took 40.56ms. Allocated memory is still 161.5MB. Free memory was 77.9MB in the beginning and 74.7MB in the end (delta: 3.1MB). 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 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L585] struct node *nodelast = ((void *)0); [L586] struct node *node = ((void *)0); [L587] COND TRUE __VERIFIER_nondet_int() [L588] node = malloc(sizeof *node) [L589] COND FALSE !(!node) [L591] node->left = ((void *)0) [L592] node->right = nodelast [L593] COND FALSE !(\read(*nodelast)) [L595] int value = __VERIFIER_nondet_int(); [L596] node->value = value [L597] nodelast = node [L587] COND FALSE !(__VERIFIER_nondet_int()) [L599] COND TRUE node != ((void *)0) [L600] node->parent = ((void *)0) [L601] COND TRUE node != ((void *)0) [L602] node->left = malloc(sizeof *node) [L603] COND FALSE !(!node) [L605] EXPR node->left [L605] node->left->left = ((void *)0) [L606] EXPR node->left [L606] node->left->right = ((void *)0) [L607] EXPR node->left [L607] node->left->value = 42 [L608] EXPR node->left [L608] node->left->parent = node [L609] EXPR node->right [L609] node = node->right [L601] COND FALSE !(node != ((void *)0)) [L611] return nodelast; [L632] struct node *data = create_tree(); [L633] COND FALSE !(!data) [L575] COND FALSE !(!(node)) [L576] COND TRUE node != ((void *)0) [L577] node->left [L577] COND TRUE node->left [L578] EXPR node->left [L578] EXPR node->left->value [L578] COND FALSE !(!(node->left->value == 42)) [L579] EXPR node->value [L579] COND TRUE !(node->value) [L565] reach_error() - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 62147.16ms, OverallIterations: 8, TraceHistogramMax: 2, EmptinessCheckTime: 21.61ms, AutomataDifference: 1677.95ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 7.81ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 351 SdHoareTripleChecker+Valid, 1120.84ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 351 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 911.82ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 453 mSDsCounter, 32 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1116 IncrementalHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 32 mSolverCounterUnsat, 0 mSDtfsCounter, 1116 mSolverCounterSat, 8.08ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 133 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 51692.86ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=7, InterpolantAutomatonStates: 42, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 40.91ms AutomataMinimizationTime, 7 MinimizatonAttempts, 65 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 18.19ms SsaConstructionTime, 162.49ms SatisfiabilityAnalysisTime, 607.15ms InterpolantComputationTime, 147 NumberOfCodeBlocks, 147 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 1096 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 9/11 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-29 08:55:50,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...