./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/tree-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/tree-3.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 62567a9991d7f3e9f65e10abc49faf02d2da380c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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-3.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 62567a9991d7f3e9f65e10abc49faf02d2da380c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:02:28,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:02:28,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:02:29,028 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:02:29,029 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:02:29,031 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:02:29,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:02:29,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:02:29,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:02:29,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:02:29,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:02:29,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:02:29,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:02:29,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:02:29,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:02:29,059 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:02:29,060 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:02:29,061 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:02:29,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:02:29,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:02:29,068 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:02:29,069 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:02:29,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:02:29,071 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:02:29,076 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:02:29,076 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:02:29,077 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:02:29,078 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:02:29,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:02:29,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:02:29,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:02:29,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:02:29,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:02:29,081 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:02:29,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:02:29,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:02:29,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:02:29,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:02:29,083 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:02:29,085 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:02:29,085 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:02:29,089 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 02:02:29,119 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:02:29,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:02:29,120 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:02:29,120 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:02:29,121 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:02:29,122 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:02:29,122 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:02:29,122 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:02:29,122 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:02:29,122 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 02:02:29,123 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:02:29,123 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:02:29,123 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:02:29,123 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:02:29,124 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:02:29,124 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:02:29,124 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:02:29,124 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:02:29,124 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:02:29,124 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:02:29,125 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:02:29,125 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:02:29,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:02:29,125 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:02:29,125 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:02:29,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:02:29,126 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 02:02:29,126 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 02:02:29,126 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:02:29,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:02:29,126 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62567a9991d7f3e9f65e10abc49faf02d2da380c [2021-08-26 02:02:29,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:02:29,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:02:29,415 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:02:29,416 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:02:29,416 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:02:29,417 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/tree-3.i [2021-08-26 02:02:29,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e5f5158/139251bab8a54242a302dbee50f56e92/FLAG817710f26 [2021-08-26 02:02:29,900 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:02:29,901 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/tree-3.i [2021-08-26 02:02:29,908 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e5f5158/139251bab8a54242a302dbee50f56e92/FLAG817710f26 [2021-08-26 02:02:29,917 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0e5f5158/139251bab8a54242a302dbee50f56e92 [2021-08-26 02:02:29,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:02:29,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:02:29,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:02:29,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:02:29,923 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:02:29,931 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:02:29" (1/1) ... [2021-08-26 02:02:29,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@626b8b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:29, skipping insertion in model container [2021-08-26 02:02:29,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:02:29" (1/1) ... [2021-08-26 02:02:29,937 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:02:29,956 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:02:30,148 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-3.i[22626,22639] [2021-08-26 02:02:30,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:02:30,196 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:02:30,251 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-3.i[22626,22639] [2021-08-26 02:02:30,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:02:30,295 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:02:30,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30 WrapperNode [2021-08-26 02:02:30,312 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:02:30,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:02:30,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:02:30,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:02:30,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,359 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,397 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:02:30,398 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:02:30,398 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:02:30,399 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:02:30,404 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,404 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,455 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,458 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:02:30,460 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:02:30,461 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:02:30,461 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:02:30,462 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (1/1) ... [2021-08-26 02:02:30,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:02:30,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:02:30,509 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 02:02:30,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 02:02:30,554 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-26 02:02:30,554 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-26 02:02:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:02:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:02:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:02:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:02:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:02:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 02:02:30,555 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:02:30,556 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:02:30,926 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:02:30,927 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-08-26 02:02:30,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:02:30 BoogieIcfgContainer [2021-08-26 02:02:30,928 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:02:30,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:02:30,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:02:30,934 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:02:30,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:02:29" (1/3) ... [2021-08-26 02:02:30,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7b217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:02:30, skipping insertion in model container [2021-08-26 02:02:30,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:30" (2/3) ... [2021-08-26 02:02:30,935 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a7b217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:02:30, skipping insertion in model container [2021-08-26 02:02:30,935 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:02:30" (3/3) ... [2021-08-26 02:02:30,936 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-3.i [2021-08-26 02:02:30,940 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:02:30,940 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 02:02:30,968 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:02:30,972 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 02:02:30,973 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 02:02:30,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 47 states, 43 states have (on average 1.744186046511628) internal successors, (75), 46 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:30,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:02:30,985 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:30,986 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:30,986 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:30,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:30,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1437310363, now seen corresponding path program 1 times [2021-08-26 02:02:30,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:30,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875969453] [2021-08-26 02:02:30,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:30,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:31,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:31,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:31,125 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875969453] [2021-08-26 02:02:31,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875969453] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:31,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:31,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-08-26 02:02:31,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044940059] [2021-08-26 02:02:31,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:02:31,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:31,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:02:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:02:31,150 INFO L87 Difference]: Start difference. First operand has 47 states, 43 states have (on average 1.744186046511628) internal successors, (75), 46 states have internal predecessors, (75), 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) [2021-08-26 02:02:31,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:31,167 INFO L93 Difference]: Finished difference Result 92 states and 148 transitions. [2021-08-26 02:02:31,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:02:31,168 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 [2021-08-26 02:02:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:31,174 INFO L225 Difference]: With dead ends: 92 [2021-08-26 02:02:31,174 INFO L226 Difference]: Without dead ends: 34 [2021-08-26 02:02:31,177 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:02:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-26 02:02:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-26 02:02:31,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-08-26 02:02:31,200 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 10 [2021-08-26 02:02:31,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:31,201 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-08-26 02:02:31,201 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) [2021-08-26 02:02:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-08-26 02:02:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 02:02:31,202 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:31,202 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:31,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 02:02:31,202 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1902394293, now seen corresponding path program 1 times [2021-08-26 02:02:31,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:31,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406635941] [2021-08-26 02:02:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:31,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:31,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:31,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:31,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:31,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406635941] [2021-08-26 02:02:31,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406635941] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:31,290 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:31,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:02:31,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619166589] [2021-08-26 02:02:31,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:02:31,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:31,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:02:31,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:31,294 INFO L87 Difference]: Start difference. First operand 34 states and 40 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) [2021-08-26 02:02:31,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:31,355 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2021-08-26 02:02:31,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:02:31,357 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 [2021-08-26 02:02:31,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:31,359 INFO L225 Difference]: With dead ends: 61 [2021-08-26 02:02:31,360 INFO L226 Difference]: Without dead ends: 38 [2021-08-26 02:02:31,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:31,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-26 02:02:31,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-26 02:02:31,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2021-08-26 02:02:31,368 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 11 [2021-08-26 02:02:31,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:31,369 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2021-08-26 02:02:31,369 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) [2021-08-26 02:02:31,369 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2021-08-26 02:02:31,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-26 02:02:31,370 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:31,370 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:31,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 02:02:31,371 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:31,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:31,372 INFO L82 PathProgramCache]: Analyzing trace with hash -617565641, now seen corresponding path program 1 times [2021-08-26 02:02:31,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:31,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559332673] [2021-08-26 02:02:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:31,374 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:31,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559332673] [2021-08-26 02:02:31,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559332673] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:31,489 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:31,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-26 02:02:31,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804245604] [2021-08-26 02:02:31,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:02:31,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:31,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:02:31,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:02:31,495 INFO L87 Difference]: Start difference. First operand 38 states and 45 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) [2021-08-26 02:02:31,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:31,581 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2021-08-26 02:02:31,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:02:31,581 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 [2021-08-26 02:02:31,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:31,583 INFO L225 Difference]: With dead ends: 81 [2021-08-26 02:02:31,583 INFO L226 Difference]: Without dead ends: 43 [2021-08-26 02:02:31,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:02:31,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-26 02:02:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2021-08-26 02:02:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 39 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2021-08-26 02:02:31,591 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 11 [2021-08-26 02:02:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:31,591 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2021-08-26 02:02:31,591 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) [2021-08-26 02:02:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2021-08-26 02:02:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 02:02:31,592 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:31,592 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:31,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-26 02:02:31,593 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:31,593 INFO L82 PathProgramCache]: Analyzing trace with hash -199489304, now seen corresponding path program 1 times [2021-08-26 02:02:31,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:31,594 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670432148] [2021-08-26 02:02:31,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:31,594 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:31,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:31,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:31,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670432148] [2021-08-26 02:02:31,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670432148] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:31,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:31,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-26 02:02:31,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137623119] [2021-08-26 02:02:31,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:02:31,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:31,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:02:31,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:31,666 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:31,706 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2021-08-26 02:02:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:02:31,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-26 02:02:31,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:31,707 INFO L225 Difference]: With dead ends: 63 [2021-08-26 02:02:31,708 INFO L226 Difference]: Without dead ends: 42 [2021-08-26 02:02:31,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:31,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-26 02:02:31,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2021-08-26 02:02:31,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 39 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2021-08-26 02:02:31,711 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 19 [2021-08-26 02:02:31,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:31,711 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2021-08-26 02:02:31,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,711 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2021-08-26 02:02:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-26 02:02:31,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:31,712 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:31,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-26 02:02:31,712 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:31,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:31,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1552949996, now seen corresponding path program 1 times [2021-08-26 02:02:31,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:31,713 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794744989] [2021-08-26 02:02:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:31,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:31,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:31,808 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:02:31,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:31,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794744989] [2021-08-26 02:02:31,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794744989] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:31,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:31,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-26 02:02:31,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133336330] [2021-08-26 02:02:31,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:02:31,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:31,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:02:31,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:02:31,810 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:31,958 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-08-26 02:02:31,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 02:02:31,959 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-26 02:02:31,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:31,959 INFO L225 Difference]: With dead ends: 89 [2021-08-26 02:02:31,959 INFO L226 Difference]: Without dead ends: 56 [2021-08-26 02:02:31,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:02:31,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-26 02:02:31,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2021-08-26 02:02:31,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 36 states have (on average 1.1666666666666667) 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) [2021-08-26 02:02:31,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-08-26 02:02:31,963 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 22 [2021-08-26 02:02:31,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:31,963 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-08-26 02:02:31,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-08-26 02:02:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:02:31,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:31,964 INFO L512 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] [2021-08-26 02:02:31,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-26 02:02:31,964 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:31,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1147750160, now seen corresponding path program 1 times [2021-08-26 02:02:31,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:31,965 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581690735] [2021-08-26 02:02:31,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:31,965 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:32,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:32,281 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:32,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:32,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581690735] [2021-08-26 02:02:32,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581690735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:02:32,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464612097] [2021-08-26 02:02:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:32,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:02:32,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:02:32,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:02:32,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 02:02:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:32,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 43 conjunts are in the unsatisfiable core [2021-08-26 02:02:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:32,480 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 [2021-08-26 02:02:32,608 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 [2021-08-26 02:02:32,616 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:02:32,616 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 [2021-08-26 02:02:32,626 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 [2021-08-26 02:02:33,333 INFO L354 Elim1Store]: treesize reduction 1382, result has 6.8 percent of original size [2021-08-26 02:02:33,334 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 6518 treesize of output 3896 [2021-08-26 02:02:34,591 INFO L354 Elim1Store]: treesize reduction 2692, result has 12.9 percent of original size [2021-08-26 02:02:34,592 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 11861 treesize of output 7816 [2021-08-26 02:02:34,873 INFO L354 Elim1Store]: treesize reduction 292, result has 14.4 percent of original size [2021-08-26 02:02:34,874 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 9059 treesize of output 6351 [2021-08-26 02:02:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:35,102 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 [2021-08-26 02:02:35,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:35,275 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 65 treesize of output 31 [2021-08-26 02:02:35,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,302 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 69 treesize of output 31 [2021-08-26 02:02:35,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:35,328 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 [2021-08-26 02:02:36,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,560 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 [2021-08-26 02:02:36,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:36,593 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 55 treesize of output 21 [2021-08-26 02:02:36,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:02:36,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:36,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 5 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 68 [2021-08-26 02:02:36,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:36,686 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-26 02:02:36,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 2346 treesize of output 1864 [2021-08-26 02:02:37,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,051 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 [2021-08-26 02:02:37,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:02:37,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,178 INFO L354 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2021-08-26 02:02:37,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 339 treesize of output 277 [2021-08-26 02:02:37,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,275 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 202 treesize of output 177 [2021-08-26 02:02:37,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,387 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 164 treesize of output 74 [2021-08-26 02:02:37,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,452 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:02:37,453 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 466 treesize of output 321 [2021-08-26 02:02:37,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 400 treesize of output 378 [2021-08-26 02:02:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,553 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 51 treesize of output 21 [2021-08-26 02:02:37,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,570 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 96 treesize of output 42 [2021-08-26 02:02:37,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,595 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 [2021-08-26 02:02:37,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,610 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 [2021-08-26 02:02:37,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:37,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,623 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 1 case distinctions, treesize of input 45 treesize of output 21 [2021-08-26 02:02:37,642 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:02:37,643 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 5 new quantified variables, introduced 4 case distinctions, treesize of input 313 treesize of output 216 [2021-08-26 02:02:37,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,651 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 179 treesize of output 155 [2021-08-26 02:02:37,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,658 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 135 treesize of output 111 [2021-08-26 02:02:37,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:02:37,665 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 99 treesize of output 79 [2021-08-26 02:02:38,092 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-08-26 02:02:38,093 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 71 [2021-08-26 02:02:38,104 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-08-26 02:02:38,105 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 59 treesize of output 48 [2021-08-26 02:02:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:38,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464612097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:02:38,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:02:38,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-08-26 02:02:38,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796868016] [2021-08-26 02:02:38,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-26 02:02:38,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:38,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-26 02:02:38,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-26 02:02:38,121 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2021-08-26 02:02:38,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:38,669 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2021-08-26 02:02:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-26 02:02:38,670 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) Word has length 27 [2021-08-26 02:02:38,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:38,670 INFO L225 Difference]: With dead ends: 72 [2021-08-26 02:02:38,670 INFO L226 Difference]: Without dead ends: 70 [2021-08-26 02:02:38,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 567.4ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-26 02:02:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-26 02:02:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-08-26 02:02:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:38,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2021-08-26 02:02:38,675 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 27 [2021-08-26 02:02:38,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:38,675 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2021-08-26 02:02:38,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 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) [2021-08-26 02:02:38,675 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2021-08-26 02:02:38,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 02:02:38,676 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:38,676 INFO L512 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] [2021-08-26 02:02:38,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 02:02:38,893 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 [2021-08-26 02:02:38,894 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:38,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:38,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1147042128, now seen corresponding path program 1 times [2021-08-26 02:02:38,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:38,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370946893] [2021-08-26 02:02:38,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:38,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:38,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:39,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:39,108 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:39,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370946893] [2021-08-26 02:02:39,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370946893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:02:39,108 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969975763] [2021-08-26 02:02:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:39,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:02:39,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:02:39,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:02:39,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 02:02:39,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:39,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-26 02:02:39,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:39,261 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 [2021-08-26 02:02:39,375 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 [2021-08-26 02:02:39,381 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:02:39,382 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 [2021-08-26 02:02:39,738 INFO L354 Elim1Store]: treesize reduction 1366, result has 7.9 percent of original size [2021-08-26 02:02:39,739 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 2349 treesize of output 827 [2021-08-26 02:02:39,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:39,784 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 2247 treesize of output 1799 [2021-08-26 02:02:39,829 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 1563 treesize of output 1559 [2021-08-26 02:02:39,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:39,949 INFO L354 Elim1Store]: treesize reduction 5, result has 84.8 percent of original size [2021-08-26 02:02:39,950 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 129 treesize of output 120 [2021-08-26 02:02:40,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:40,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:40,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:40,095 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 118 treesize of output 86 [2021-08-26 02:02:40,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:40,198 INFO L354 Elim1Store]: treesize reduction 20, result has 71.0 percent of original size [2021-08-26 02:02:40,199 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 274 treesize of output 282 [2021-08-26 02:02:40,525 INFO L354 Elim1Store]: treesize reduction 176, result has 20.4 percent of original size [2021-08-26 02:02:40,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 103 [2021-08-26 02:02:40,532 INFO L354 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2021-08-26 02:02:40,533 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 [2021-08-26 02:02:41,320 INFO L354 Elim1Store]: treesize reduction 52, result has 28.8 percent of original size [2021-08-26 02:02:41,320 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 [2021-08-26 02:02:41,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:41,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969975763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:02:41,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 02:02:41,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-26 02:02:41,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940716256] [2021-08-26 02:02:41,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-26 02:02:41,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-26 02:02:41,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-08-26 02:02:41,349 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:41,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:41,743 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-08-26 02:02:41,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-26 02:02:41,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-08-26 02:02:41,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:41,744 INFO L225 Difference]: With dead ends: 85 [2021-08-26 02:02:41,744 INFO L226 Difference]: Without dead ends: 72 [2021-08-26 02:02:41,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-08-26 02:02:41,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-26 02:02:41,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2021-08-26 02:02:41,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 48 states have (on average 1.1458333333333333) internal successors, (55), 49 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:41,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2021-08-26 02:02:41,749 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 27 [2021-08-26 02:02:41,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:41,750 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2021-08-26 02:02:41,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.764705882352941) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:41,750 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2021-08-26 02:02:41,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-26 02:02:41,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:41,751 INFO L512 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, 1, 1] [2021-08-26 02:02:41,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 02:02:41,961 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 [2021-08-26 02:02:41,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:41,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:41,961 INFO L82 PathProgramCache]: Analyzing trace with hash -384468434, now seen corresponding path program 1 times [2021-08-26 02:02:41,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 02:02:41,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000632566] [2021-08-26 02:02:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:41,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 02:02:41,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:42,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 02:02:42,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000632566] [2021-08-26 02:02:42,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000632566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 02:02:42,124 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333475608] [2021-08-26 02:02:42,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:42,124 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:02:42,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:02:42,125 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:02:42,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 02:02:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:42,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 39 conjunts are in the unsatisfiable core [2021-08-26 02:02:42,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:42,301 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 [2021-08-26 02:02:42,341 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 13 treesize of output 9 [2021-08-26 02:02:42,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:42,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-08-26 02:02:42,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:02:42,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-26 02:02:42,416 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 [2021-08-26 02:02:42,422 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:02:42,422 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 [2021-08-26 02:02:42,937 INFO L354 Elim1Store]: treesize reduction 1366, result has 7.9 percent of original size [2021-08-26 02:02:42,937 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 4488 treesize of output 2450 [2021-08-26 02:02:42,952 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 6900 treesize of output 5924 [2021-08-26 02:02:42,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-08-26 02:02:42,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-26 02:02:42,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-08-26 02:02:42,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855862559] [2021-08-26 02:02:42,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-26 02:02:42,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 02:02:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-26 02:02:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:02:42,996 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:02:43,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:02:43,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:02:43,214 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2e99b29b at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:864) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:778) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-08-26 02:02:43,217 INFO L168 Benchmark]: Toolchain (without parser) took 13295.59 ms. Allocated memory was 48.2 MB in the beginning and 394.3 MB in the end (delta: 346.0 MB). Free memory was 22.9 MB in the beginning and 361.0 MB in the end (delta: -338.0 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:02:43,217 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 48.2 MB. Free memory was 30.7 MB in the beginning and 30.7 MB in the end (delta: 39.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:02:43,217 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.67 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.8 MB in the beginning and 37.4 MB in the end (delta: -14.6 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:02:43,217 INFO L168 Benchmark]: Boogie Procedure Inliner took 83.31 ms. Allocated memory is still 60.8 MB. Free memory was 37.4 MB in the beginning and 35.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:02:43,217 INFO L168 Benchmark]: Boogie Preprocessor took 61.39 ms. Allocated memory is still 60.8 MB. Free memory was 35.1 MB in the beginning and 33.3 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:02:43,217 INFO L168 Benchmark]: RCFGBuilder took 467.96 ms. Allocated memory is still 60.8 MB. Free memory was 33.3 MB in the beginning and 33.2 MB in the end (delta: 63.9 kB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2021-08-26 02:02:43,218 INFO L168 Benchmark]: TraceAbstraction took 12283.17 ms. Allocated memory was 60.8 MB in the beginning and 394.3 MB in the end (delta: 333.4 MB). Free memory was 32.6 MB in the beginning and 361.0 MB in the end (delta: -328.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-08-26 02:02:43,219 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 48.2 MB. Free memory was 30.7 MB in the beginning and 30.7 MB in the end (delta: 39.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 392.67 ms. Allocated memory was 48.2 MB in the beginning and 60.8 MB in the end (delta: 12.6 MB). Free memory was 22.8 MB in the beginning and 37.4 MB in the end (delta: -14.6 MB). Peak memory consumption was 5.9 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 83.31 ms. Allocated memory is still 60.8 MB. Free memory was 37.4 MB in the beginning and 35.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.39 ms. Allocated memory is still 60.8 MB. Free memory was 35.1 MB in the beginning and 33.3 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 467.96 ms. Allocated memory is still 60.8 MB. Free memory was 33.3 MB in the beginning and 33.2 MB in the end (delta: 63.9 kB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12283.17 ms. Allocated memory was 60.8 MB in the beginning and 394.3 MB in the end (delta: 333.4 MB). Free memory was 32.6 MB in the beginning and 361.0 MB in the end (delta: -328.4 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2e99b29b de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2e99b29b: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-08-26 02:02:43,247 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... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 02:02:45,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 02:02:45,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 02:02:45,253 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 02:02:45,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 02:02:45,255 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 02:02:45,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 02:02:45,273 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 02:02:45,274 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 02:02:45,275 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 02:02:45,276 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 02:02:45,294 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 02:02:45,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 02:02:45,296 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 02:02:45,297 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 02:02:45,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 02:02:45,298 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 02:02:45,299 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 02:02:45,300 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 02:02:45,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 02:02:45,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 02:02:45,303 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 02:02:45,304 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 02:02:45,304 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 02:02:45,306 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 02:02:45,306 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 02:02:45,307 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 02:02:45,307 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 02:02:45,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 02:02:45,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 02:02:45,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 02:02:45,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 02:02:45,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 02:02:45,310 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 02:02:45,310 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 02:02:45,311 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 02:02:45,311 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 02:02:45,311 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 02:02:45,311 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 02:02:45,312 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 02:02:45,313 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 02:02:45,330 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-26 02:02:45,358 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 02:02:45,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 02:02:45,358 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 02:02:45,358 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 02:02:45,359 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 02:02:45,359 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 02:02:45,360 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 02:02:45,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 02:02:45,360 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 02:02:45,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 02:02:45,361 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 02:02:45,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 02:02:45,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 02:02:45,362 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 02:02:45,363 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-26 02:02:45,363 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-26 02:02:45,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 02:02:45,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 02:02:45,363 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 02:02:45,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 02:02:45,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 02:02:45,364 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 02:02:45,364 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 02:02:45,364 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:02:45,364 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 02:02:45,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 02:02:45,365 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 02:02:45,365 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-26 02:02:45,365 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-26 02:02:45,365 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 02:02:45,366 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 02:02:45,366 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-26 02:02:45,366 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62567a9991d7f3e9f65e10abc49faf02d2da380c [2021-08-26 02:02:45,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 02:02:45,760 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 02:02:45,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 02:02:45,763 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 02:02:45,764 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 02:02:45,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/tree-3.i [2021-08-26 02:02:45,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8756ff4a7/b83ae236877a4d1a8958b3905586b5e7/FLAG9973c4b87 [2021-08-26 02:02:46,335 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 02:02:46,341 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/tree-3.i [2021-08-26 02:02:46,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8756ff4a7/b83ae236877a4d1a8958b3905586b5e7/FLAG9973c4b87 [2021-08-26 02:02:46,853 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8756ff4a7/b83ae236877a4d1a8958b3905586b5e7 [2021-08-26 02:02:46,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 02:02:46,856 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 02:02:46,860 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 02:02:46,861 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 02:02:46,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 02:02:46,863 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:02:46" (1/1) ... [2021-08-26 02:02:46,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dbe26b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:46, skipping insertion in model container [2021-08-26 02:02:46,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 02:02:46" (1/1) ... [2021-08-26 02:02:46,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 02:02:46,917 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 02:02:47,148 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-3.i[22626,22639] [2021-08-26 02:02:47,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:02:47,188 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 02:02:47,218 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-3.i[22626,22639] [2021-08-26 02:02:47,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 02:02:47,260 INFO L208 MainTranslator]: Completed translation [2021-08-26 02:02:47,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47 WrapperNode [2021-08-26 02:02:47,261 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 02:02:47,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 02:02:47,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 02:02:47,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 02:02:47,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 02:02:47,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 02:02:47,320 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 02:02:47,320 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 02:02:47,326 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,364 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,371 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 02:02:47,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 02:02:47,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 02:02:47,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 02:02:47,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (1/1) ... [2021-08-26 02:02:47,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 02:02:47,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:02:47,398 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 02:02:47,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 02:02:47,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-26 02:02:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-26 02:02:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-26 02:02:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 02:02:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-26 02:02:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-26 02:02:47,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-26 02:02:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-26 02:02:47,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 02:02:47,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 02:02:48,032 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 02:02:48,032 INFO L299 CfgBuilder]: Removed 27 assume(true) statements. [2021-08-26 02:02:48,034 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:02:48 BoogieIcfgContainer [2021-08-26 02:02:48,034 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 02:02:48,035 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 02:02:48,035 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 02:02:48,037 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 02:02:48,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 02:02:46" (1/3) ... [2021-08-26 02:02:48,037 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117a65d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:02:48, skipping insertion in model container [2021-08-26 02:02:48,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 02:02:47" (2/3) ... [2021-08-26 02:02:48,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@117a65d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 02:02:48, skipping insertion in model container [2021-08-26 02:02:48,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:02:48" (3/3) ... [2021-08-26 02:02:48,039 INFO L111 eAbstractionObserver]: Analyzing ICFG tree-3.i [2021-08-26 02:02:48,042 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 02:02:48,042 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-08-26 02:02:48,071 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 02:02:48,075 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 02:02:48,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-26 02:02:48,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 45 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:48,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:02:48,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:48,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:48,091 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:48,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:48,094 INFO L82 PathProgramCache]: Analyzing trace with hash -907666448, now seen corresponding path program 1 times [2021-08-26 02:02:48,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:02:48,102 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [317563358] [2021-08-26 02:02:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:48,103 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:02:48,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:02:48,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:02:48,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-26 02:02:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:48,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-08-26 02:02:48,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:48,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:02:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:48,275 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:02:48,275 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [317563358] [2021-08-26 02:02:48,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [317563358] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:48,276 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:48,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-08-26 02:02:48,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969476922] [2021-08-26 02:02:48,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-08-26 02:02:48,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:02:48,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-08-26 02:02:48,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:02:48,293 INFO L87 Difference]: Start difference. First operand has 46 states, 42 states have (on average 1.7619047619047619) internal successors, (74), 45 states have internal predecessors, (74), 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) [2021-08-26 02:02:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:48,305 INFO L93 Difference]: Finished difference Result 90 states and 146 transitions. [2021-08-26 02:02:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-08-26 02:02:48,306 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 [2021-08-26 02:02:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:48,311 INFO L225 Difference]: With dead ends: 90 [2021-08-26 02:02:48,311 INFO L226 Difference]: Without dead ends: 33 [2021-08-26 02:02:48,313 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-08-26 02:02:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-26 02:02:48,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-26 02:02:48,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.3) internal successors, (39), 32 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) [2021-08-26 02:02:48,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-08-26 02:02:48,332 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 10 [2021-08-26 02:02:48,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:48,332 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-08-26 02:02:48,332 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) [2021-08-26 02:02:48,333 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-08-26 02:02:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:02:48,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:48,333 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:48,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-08-26 02:02:48,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:02:48,542 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:48,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1843172524, now seen corresponding path program 1 times [2021-08-26 02:02:48,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:02:48,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [642430030] [2021-08-26 02:02:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:48,546 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:02:48,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:02:48,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:02:48,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-26 02:02:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:48,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-26 02:02:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:48,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:48,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:02:48,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:48,732 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:02:48,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [642430030] [2021-08-26 02:02:48,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [642430030] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:48,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:48,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-26 02:02:48,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888213556] [2021-08-26 02:02:48,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:02:48,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:02:48,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:02:48,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:48,742 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:48,868 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-08-26 02:02:48,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:02:48,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 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 [2021-08-26 02:02:48,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:48,878 INFO L225 Difference]: With dead ends: 59 [2021-08-26 02:02:48,879 INFO L226 Difference]: Without dead ends: 36 [2021-08-26 02:02:48,879 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:48,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-26 02:02:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-26 02:02:48,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 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) [2021-08-26 02:02:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-08-26 02:02:48,887 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 10 [2021-08-26 02:02:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:48,888 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-08-26 02:02:48,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-08-26 02:02:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-26 02:02:48,889 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:48,889 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:48,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-08-26 02:02:49,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:02:49,097 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:49,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:49,097 INFO L82 PathProgramCache]: Analyzing trace with hash -68165162, now seen corresponding path program 1 times [2021-08-26 02:02:49,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:02:49,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1538096077] [2021-08-26 02:02:49,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:49,098 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:02:49,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:02:49,099 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:02:49,101 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-26 02:02:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:49,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 02:02:49,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:49,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:02:49,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:49,300 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:02:49,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1538096077] [2021-08-26 02:02:49,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1538096077] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:49,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:49,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-26 02:02:49,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350940189] [2021-08-26 02:02:49,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-26 02:02:49,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:02:49,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-26 02:02:49,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-26 02:02:49,302 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:49,380 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2021-08-26 02:02:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 02:02:49,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 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 [2021-08-26 02:02:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:49,381 INFO L225 Difference]: With dead ends: 78 [2021-08-26 02:02:49,381 INFO L226 Difference]: Without dead ends: 41 [2021-08-26 02:02:49,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:02:49,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-26 02:02:49,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2021-08-26 02:02:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 37 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:49,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2021-08-26 02:02:49,385 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 10 [2021-08-26 02:02:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:49,385 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2021-08-26 02:02:49,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2021-08-26 02:02:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-26 02:02:49,386 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:49,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:49,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-26 02:02:49,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:02:49,595 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:49,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:49,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1748129759, now seen corresponding path program 1 times [2021-08-26 02:02:49,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:02:49,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629112819] [2021-08-26 02:02:49,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:49,596 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:02:49,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:02:49,597 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:02:49,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-26 02:02:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:49,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-26 02:02:49,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:49,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:49,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:02:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:02:49,767 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:02:49,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629112819] [2021-08-26 02:02:49,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [629112819] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:49,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:49,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-26 02:02:49,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062273325] [2021-08-26 02:02:49,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-26 02:02:49,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:02:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-26 02:02:49,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:49,769 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:50,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:50,668 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2021-08-26 02:02:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-26 02:02:50,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-26 02:02:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:50,669 INFO L225 Difference]: With dead ends: 61 [2021-08-26 02:02:50,669 INFO L226 Difference]: Without dead ends: 40 [2021-08-26 02:02:50,669 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-26 02:02:50,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-26 02:02:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2021-08-26 02:02:50,671 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) [2021-08-26 02:02:50,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2021-08-26 02:02:50,672 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 17 [2021-08-26 02:02:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:50,673 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2021-08-26 02:02:50,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:50,673 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2021-08-26 02:02:50,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 02:02:50,673 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:50,674 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 02:02:50,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-08-26 02:02:50,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:02:50,882 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash -562052262, now seen corresponding path program 1 times [2021-08-26 02:02:50,883 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:02:50,883 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [487617553] [2021-08-26 02:02:50,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:50,884 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:02:50,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:02:50,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:02:50,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-26 02:02:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:50,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-26 02:02:50,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:02:51,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:02:51,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 02:02:51,132 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:02:51,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [487617553] [2021-08-26 02:02:51,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [487617553] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-26 02:02:51,132 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:02:51,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2021-08-26 02:02:51,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176019873] [2021-08-26 02:02:51,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 02:02:51,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-26 02:02:51,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 02:02:51,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-26 02:02:51,134 INFO L87 Difference]: Start difference. First operand 38 states and 43 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) [2021-08-26 02:02:54,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 02:02:54,596 INFO L93 Difference]: Finished difference Result 86 states and 99 transitions. [2021-08-26 02:02:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-26 02:02:54,596 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 [2021-08-26 02:02:54,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 02:02:54,597 INFO L225 Difference]: With dead ends: 86 [2021-08-26 02:02:54,597 INFO L226 Difference]: Without dead ends: 54 [2021-08-26 02:02:54,597 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-26 02:02:54,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-26 02:02:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-08-26 02:02:54,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 02:02:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-08-26 02:02:54,600 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2021-08-26 02:02:54,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 02:02:54,600 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-08-26 02:02:54,600 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) [2021-08-26 02:02:54,600 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-08-26 02:02:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-26 02:02:54,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 02:02:54,601 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-26 02:02:54,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-26 02:02:54,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:02:54,807 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 02:02:54,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 02:02:54,808 INFO L82 PathProgramCache]: Analyzing trace with hash 65748649, now seen corresponding path program 1 times [2021-08-26 02:02:54,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-26 02:02:54,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153643810] [2021-08-26 02:02:54,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:02:54,809 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-26 02:02:54,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-26 02:02:54,810 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-26 02:02:54,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-26 02:02:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:02:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 02:02:54,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:02:54,987 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 [2021-08-26 02:02:55,112 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 [2021-08-26 02:02:55,121 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 28 treesize of output 24 [2021-08-26 02:02:55,131 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:02:55,132 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 21 treesize of output 21 [2021-08-26 02:03:02,192 WARN L207 SmtUtils]: Spent 6.97 s on a formula simplification. DAG size of input: 163 DAG size of output: 47 [2021-08-26 02:03:02,193 INFO L354 Elim1Store]: treesize reduction 1382, result has 6.8 percent of original size [2021-08-26 02:03:02,194 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 6522 treesize of output 3884 [2021-08-26 02:03:07,698 WARN L207 SmtUtils]: Spent 5.41 s on a formula simplification. DAG size of input: 372 DAG size of output: 152 [2021-08-26 02:03:07,699 INFO L354 Elim1Store]: treesize reduction 2692, result has 12.9 percent of original size [2021-08-26 02:03:07,700 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 11891 treesize of output 7854 [2021-08-26 02:03:08,193 INFO L354 Elim1Store]: treesize reduction 292, result has 14.4 percent of original size [2021-08-26 02:03:08,194 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 9098 treesize of output 6390 [2021-08-26 02:03:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:08,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:08,496 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 53 treesize of output 25 [2021-08-26 02:03:08,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:08,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:08,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:08,790 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:08,790 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 59 treesize of output 25 [2021-08-26 02:03:10,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,469 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 [2021-08-26 02:03:10,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:03:10,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,630 INFO L354 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2021-08-26 02:03:10,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 4 disjoint index pairs (out of 21 index pairs), introduced 6 new quantified variables, introduced 16 case distinctions, treesize of input 435 treesize of output 331 [2021-08-26 02:03:10,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:10,901 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 21 [2021-08-26 02:03:10,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:03:10,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:10,951 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:10,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 112 treesize of output 64 [2021-08-26 02:03:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,025 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 69 treesize of output 31 [2021-08-26 02:03:11,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,081 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:03:11,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,104 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-26 02:03:11,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 278 treesize of output 248 [2021-08-26 02:03:11,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,309 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:11,309 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 49 treesize of output 21 [2021-08-26 02:03:11,358 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,359 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:03:11,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,381 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:11,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 68 [2021-08-26 02:03:11,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:03:11,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,446 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:03:11,447 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 7 case distinctions, treesize of input 2217 treesize of output 1736 [2021-08-26 02:03:11,864 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-08-26 02:03:11,864 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 4 case distinctions, treesize of input 691 treesize of output 489 [2021-08-26 02:03:11,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,889 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-26 02:03:11,889 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 637 treesize of output 569 [2021-08-26 02:03:11,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,915 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:03:11,915 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 567 treesize of output 531 [2021-08-26 02:03:11,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:11,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:11,931 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 511 treesize of output 487 [2021-08-26 02:03:12,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:12,140 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 96 treesize of output 60 [2021-08-26 02:03:12,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,169 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 [2021-08-26 02:03:12,188 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-26 02:03:12,189 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 417 treesize of output 295 [2021-08-26 02:03:12,204 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-26 02:03:12,204 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 367 treesize of output 253 [2021-08-26 02:03:12,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:12,304 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 [2021-08-26 02:03:12,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:12,321 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 [2021-08-26 02:03:12,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:12,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:12,339 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 [2021-08-26 02:03:12,350 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:03:12,350 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 191 treesize of output 125 [2021-08-26 02:03:12,953 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:03:12,953 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 65 [2021-08-26 02:03:12,971 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-08-26 02:03:12,972 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 53 treesize of output 42 [2021-08-26 02:03:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:03:12,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:03:13,488 INFO L354 Elim1Store]: treesize reduction 550, result has 49.3 percent of original size [2021-08-26 02:03:13,491 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 [2021-08-26 02:03:13,685 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:13,686 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 [2021-08-26 02:03:27,242 WARN L207 SmtUtils]: Spent 11.06 s on a formula simplification that was a NOOP. DAG size: 72 [2021-08-26 02:03:27,439 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-26 02:03:27,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153643810] [2021-08-26 02:03:27,439 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:03:27,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1054435412] [2021-08-26 02:03:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:03:27,440 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-08-26 02:03:27,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-08-26 02:03:27,449 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-08-26 02:03:27,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-08-26 02:03:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:03:27,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 02:03:27,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:03:27,723 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 [2021-08-26 02:03:27,849 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 [2021-08-26 02:03:27,867 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 28 treesize of output 24 [2021-08-26 02:03:27,880 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:03:27,880 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 21 treesize of output 21 [2021-08-26 02:03:36,224 WARN L207 SmtUtils]: Spent 8.29 s on a formula simplification. DAG size of input: 163 DAG size of output: 47 [2021-08-26 02:03:36,225 INFO L354 Elim1Store]: treesize reduction 1382, result has 6.8 percent of original size [2021-08-26 02:03:36,226 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 6630 treesize of output 3968 [2021-08-26 02:03:42,125 WARN L207 SmtUtils]: Spent 5.87 s on a formula simplification. DAG size of input: 372 DAG size of output: 152 [2021-08-26 02:03:42,126 INFO L354 Elim1Store]: treesize reduction 2692, result has 12.9 percent of original size [2021-08-26 02:03:42,126 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 11975 treesize of output 7914 [2021-08-26 02:03:42,496 INFO L354 Elim1Store]: treesize reduction 292, result has 14.4 percent of original size [2021-08-26 02:03:42,496 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 9086 treesize of output 6378 [2021-08-26 02:03:42,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:42,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:42,792 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:42,792 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 53 treesize of output 25 [2021-08-26 02:03:43,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:43,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:43,067 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:43,068 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 49 treesize of output 21 [2021-08-26 02:03:44,902 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:03:44,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:44,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:44,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:44,928 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:03:44,929 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 7 case distinctions, treesize of input 2650 treesize of output 2089 [2021-08-26 02:03:44,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:03:45,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:45,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:45,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:45,034 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:03:45,035 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 9 case distinctions, treesize of input 2587 treesize of output 2034 [2021-08-26 02:03:46,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:46,164 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 [2021-08-26 02:03:46,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:46,238 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 59 treesize of output 25 [2021-08-26 02:03:46,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,348 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:46,348 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 67 treesize of output 27 [2021-08-26 02:03:46,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,386 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 [2021-08-26 02:03:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,422 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:03:46,423 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 551 treesize of output 407 [2021-08-26 02:03:46,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,850 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 [2021-08-26 02:03:46,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:46,901 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 [2021-08-26 02:03:46,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,941 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 [2021-08-26 02:03:46,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:46,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:46,987 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 [2021-08-26 02:03:47,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:47,059 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 [2021-08-26 02:03:47,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:47,106 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 [2021-08-26 02:03:47,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,132 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 69 treesize of output 31 [2021-08-26 02:03:47,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:47,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-08-26 02:03:47,215 INFO L354 Elim1Store]: treesize reduction 90, result has 1.1 percent of original size [2021-08-26 02:03:47,215 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 375 treesize of output 335 [2021-08-26 02:03:47,239 INFO L354 Elim1Store]: treesize reduction 64, result has 1.5 percent of original size [2021-08-26 02:03:47,239 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 7 new quantified variables, introduced 5 case distinctions, treesize of input 305 treesize of output 206 [2021-08-26 02:03:47,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,269 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-26 02:03:47,270 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 243 treesize of output 203 [2021-08-26 02:03:47,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:03:47,347 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:47,347 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 [2021-08-26 02:03:47,366 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-26 02:03:47,366 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 139 treesize of output 93 [2021-08-26 02:03:47,410 INFO L354 Elim1Store]: treesize reduction 40, result has 36.5 percent of original size [2021-08-26 02:03:47,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 68 [2021-08-26 02:03:47,852 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:03:47,852 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 65 [2021-08-26 02:03:47,863 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-08-26 02:03:47,863 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 53 treesize of output 42 [2021-08-26 02:03:47,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:03:47,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:03:49,525 INFO L354 Elim1Store]: treesize reduction 550, result has 49.3 percent of original size [2021-08-26 02:03:49,526 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 [2021-08-26 02:03:49,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:03:49,918 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 [2021-08-26 02:03:54,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:03:54,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341154430] [2021-08-26 02:03:54,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 02:03:54,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 02:03:54,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 02:03:54,101 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 02:03:54,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-26 02:03:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 02:03:54,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-26 02:03:54,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 02:03:54,367 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 [2021-08-26 02:03:54,525 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 30 treesize of output 26 [2021-08-26 02:03:54,538 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-08-26 02:03:54,538 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 [2021-08-26 02:03:54,549 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 [2021-08-26 02:04:03,139 WARN L207 SmtUtils]: Spent 8.53 s on a formula simplification. DAG size of input: 164 DAG size of output: 48 [2021-08-26 02:04:03,140 INFO L354 Elim1Store]: treesize reduction 1382, result has 6.8 percent of original size [2021-08-26 02:04:03,140 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 6630 treesize of output 3968 [2021-08-26 02:04:03,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:09,805 WARN L207 SmtUtils]: Spent 6.64 s on a formula simplification. DAG size of input: 373 DAG size of output: 153 [2021-08-26 02:04:09,806 INFO L354 Elim1Store]: treesize reduction 2692, result has 12.9 percent of original size [2021-08-26 02:04:09,807 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 12901 treesize of output 8248 [2021-08-26 02:04:10,230 INFO L354 Elim1Store]: treesize reduction 292, result has 14.4 percent of original size [2021-08-26 02:04:10,231 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 9232 treesize of output 7020 [2021-08-26 02:04:10,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:10,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:10,583 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:10,583 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 53 treesize of output 25 [2021-08-26 02:04:10,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:10,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:10,876 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 [2021-08-26 02:04:13,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-26 02:04:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:13,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:13,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:13,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:13,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 112 treesize of output 68 [2021-08-26 02:04:14,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,349 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-26 02:04:14,349 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 965 treesize of output 925 [2021-08-26 02:04:14,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,434 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-08-26 02:04:14,434 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 899 treesize of output 863 [2021-08-26 02:04:14,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,468 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:14,485 INFO L354 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2021-08-26 02:04:14,485 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 837 treesize of output 797 [2021-08-26 02:04:15,417 INFO L354 Elim1Store]: treesize reduction 344, result has 12.0 percent of original size [2021-08-26 02:04:15,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 11 new quantified variables, introduced 23 case distinctions, treesize of input 861 treesize of output 620 [2021-08-26 02:04:15,455 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-26 02:04:15,455 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 871 treesize of output 629 [2021-08-26 02:04:15,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:15,523 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-08-26 02:04:15,523 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 3 case distinctions, treesize of input 821 treesize of output 787 [2021-08-26 02:04:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:15,552 INFO L354 Elim1Store]: treesize reduction 26, result has 3.7 percent of original size [2021-08-26 02:04:15,552 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 4 new quantified variables, introduced 2 case distinctions, treesize of input 767 treesize of output 729 [2021-08-26 02:04:15,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:15,581 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:15,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 699 treesize of output 675 [2021-08-26 02:04:15,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:15,609 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-08-26 02:04:15,609 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 4 new quantified variables, introduced 4 case distinctions, treesize of input 655 treesize of output 621 [2021-08-26 02:04:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,016 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 [2021-08-26 02:04:16,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,062 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,062 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 101 treesize of output 47 [2021-08-26 02:04:16,108 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,117 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 [2021-08-26 02:04:16,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 194 treesize of output 167 [2021-08-26 02:04:16,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,256 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,256 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 51 treesize of output 21 [2021-08-26 02:04:16,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,282 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 27 [2021-08-26 02:04:16,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,307 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 [2021-08-26 02:04:16,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,335 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,335 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 [2021-08-26 02:04:16,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,356 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:04:16,357 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 289 treesize of output 192 [2021-08-26 02:04:16,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-26 02:04:16,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:16,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 223 treesize of output 201 [2021-08-26 02:04:16,428 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-08-26 02:04:16,428 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 191 treesize of output 125 [2021-08-26 02:04:16,990 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-26 02:04:16,990 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 65 [2021-08-26 02:04:17,008 INFO L354 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2021-08-26 02:04:17,008 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 53 treesize of output 42 [2021-08-26 02:04:17,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 02:04:17,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-26 02:04:18,094 INFO L354 Elim1Store]: treesize reduction 550, result has 49.3 percent of original size [2021-08-26 02:04:18,095 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 [2021-08-26 02:04:18,362 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-26 02:04:18,362 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 [2021-08-26 02:04:20,804 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Alternating quantifiers not yet supported [2021-08-26 02:04:20,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-08-26 02:04:20,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-08-26 02:04:20,805 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-08-26 02:04:20,805 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-08-26 02:04:20,808 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:04:20,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:04:20,810 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 02:04:20,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-26 02:04:21,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-08-26 02:04:21,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-26 02:04:21,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-26 02:04:21,434 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 02:04:21,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 02:04:21 BoogieIcfgContainer [2021-08-26 02:04:21,443 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 02:04:21,444 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 02:04:21,444 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 02:04:21,444 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 02:04:21,444 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 02:02:48" (3/4) ... [2021-08-26 02:04:21,446 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-26 02:04:21,446 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 02:04:21,447 INFO L168 Benchmark]: Toolchain (without parser) took 94590.50 ms. Allocated memory was 58.7 MB in the beginning and 163.6 MB in the end (delta: 104.9 MB). Free memory was 36.8 MB in the beginning and 108.9 MB in the end (delta: -72.1 MB). Peak memory consumption was 32.5 MB. Max. memory is 16.1 GB. [2021-08-26 02:04:21,447 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory was 40.3 MB in the beginning and 40.2 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:04:21,447 INFO L168 Benchmark]: CACSL2BoogieTranslator took 400.57 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 34.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-26 02:04:21,447 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.55 ms. Allocated memory is still 58.7 MB. Free memory was 34.1 MB in the beginning and 31.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:04:21,448 INFO L168 Benchmark]: Boogie Preprocessor took 56.58 ms. Allocated memory is still 58.7 MB. Free memory was 31.8 MB in the beginning and 29.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 02:04:21,448 INFO L168 Benchmark]: RCFGBuilder took 656.76 ms. Allocated memory was 58.7 MB in the beginning and 94.4 MB in the end (delta: 35.7 MB). Free memory was 29.6 MB in the beginning and 74.0 MB in the end (delta: -44.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. [2021-08-26 02:04:21,448 INFO L168 Benchmark]: TraceAbstraction took 93408.44 ms. Allocated memory was 94.4 MB in the beginning and 163.6 MB in the end (delta: 69.2 MB). Free memory was 73.5 MB in the beginning and 109.5 MB in the end (delta: -35.9 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-08-26 02:04:21,448 INFO L168 Benchmark]: Witness Printer took 2.52 ms. Allocated memory is still 163.6 MB. Free memory was 109.5 MB in the beginning and 108.9 MB in the end (delta: 580.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 02:04:21,449 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 58.7 MB. Free memory was 40.3 MB in the beginning and 40.2 MB in the end (delta: 39.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 400.57 ms. Allocated memory is still 58.7 MB. Free memory was 36.6 MB in the beginning and 34.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.55 ms. Allocated memory is still 58.7 MB. Free memory was 34.1 MB in the beginning and 31.8 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.58 ms. Allocated memory is still 58.7 MB. Free memory was 31.8 MB in the beginning and 29.8 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 656.76 ms. Allocated memory was 58.7 MB in the beginning and 94.4 MB in the end (delta: 35.7 MB). Free memory was 29.6 MB in the beginning and 74.0 MB in the end (delta: -44.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 93408.44 ms. Allocated memory was 94.4 MB in the beginning and 163.6 MB in the end (delta: 69.2 MB). Free memory was 73.5 MB in the beginning and 109.5 MB in the end (delta: -35.9 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.52 ms. Allocated memory is still 163.6 MB. Free memory was 109.5 MB in the beginning and 108.9 MB in the end (delta: 580.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 565]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible 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] COND TRUE !value [L597] value = 1 [L598] node->value = value [L599] nodelast = node [L587] COND FALSE !(__VERIFIER_nondet_int()) [L601] COND TRUE node != ((void *)0) [L602] node->parent = ((void *)0) [L603] COND TRUE node != ((void *)0) [L604] node->left = malloc(sizeof *node) [L605] COND FALSE !(!node) [L607] EXPR node->left [L607] node->left->left = ((void *)0) [L608] EXPR node->left [L608] node->left->right = ((void *)0) [L609] EXPR node->left [L609] node->left->value = 42 [L610] EXPR node->left [L610] node->left->parent = node [L611] EXPR node->right [L611] node = node->right [L603] COND FALSE !(node != ((void *)0)) [L613] return nodelast; [L634] struct node *data = create_tree(); [L635] 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 TRUE !(node->left->value == 42) [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, 46 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 93363.9ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 10.3ms, AutomataDifference: 4616.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 6.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 184 SDtfs, 159 SDslu, 192 SDs, 0 SdLazy, 121 SolverSat, 10 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4373.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 105.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, InterpolantAutomatonStates: 21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 27.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 23 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 43.3ms SsaConstructionTime, 91.1ms SatisfiabilityAnalysisTime, 613.3ms InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 124 ConstructedInterpolants, 0 QuantifiedInterpolants, 370 SizeOfPredicates, 9 NumberOfNonLiveVariables, 265 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 10 InterpolantComputations, 10 PerfectInterpolantSequences, 6/6 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 could not prove your program: unable to determine feasibility of some traces [2021-08-26 02:04:21,489 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...