./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/list-properties/list_search-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/list-properties/list_search-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:36:18,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:36:18,984 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:36:19,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:36:19,011 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:36:19,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:36:19,015 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:36:19,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:36:19,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:36:19,025 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:36:19,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:36:19,027 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:36:19,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:36:19,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:36:19,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:36:19,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:36:19,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:36:19,032 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:36:19,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:36:19,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:36:19,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:36:19,041 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:36:19,042 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:36:19,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:36:19,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:36:19,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:36:19,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:36:19,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:36:19,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:36:19,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:36:19,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:36:19,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:36:19,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:36:19,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:36:19,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:36:19,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:36:19,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:36:19,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:36:19,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:36:19,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:36:19,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:36:19,053 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:36:19,073 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:36:19,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:36:19,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:36:19,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:36:19,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:36:19,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:36:19,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:36:19,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:36:19,077 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:36:19,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:36:19,078 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:36:19,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:36:19,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:36:19,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:36:19,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:36:19,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:36:19,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:36:19,079 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:36:19,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:36:19,080 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:36:19,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:36:19,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:36:19,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:36:19,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:36:19,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:36:19,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:36:19,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:36:19,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:36:19,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:36:19,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:36:19,082 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:36:19,082 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:36:19,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:36:19,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:36:19,083 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2021-12-14 13:36:19,263 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:36:19,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:36:19,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:36:19,284 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:36:19,285 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:36:19,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_search-1.i [2021-12-14 13:36:19,329 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46df4f559/95b6f87e9a4e4e0f8f74bafa4bc37445/FLAGcb5d19838 [2021-12-14 13:36:19,648 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:36:19,649 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i [2021-12-14 13:36:19,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46df4f559/95b6f87e9a4e4e0f8f74bafa4bc37445/FLAGcb5d19838 [2021-12-14 13:36:20,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46df4f559/95b6f87e9a4e4e0f8f74bafa4bc37445 [2021-12-14 13:36:20,066 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:36:20,067 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:36:20,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:36:20,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:36:20,071 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:36:20,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e71b53e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20, skipping insertion in model container [2021-12-14 13:36:20,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:36:20,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:36:20,214 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-12-14 13:36:20,316 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:36:20,322 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:36:20,332 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-12-14 13:36:20,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:36:20,379 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:36:20,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20 WrapperNode [2021-12-14 13:36:20,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:36:20,381 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:36:20,381 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:36:20,381 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:36:20,387 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,407 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,420 INFO L137 Inliner]: procedures = 125, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2021-12-14 13:36:20,423 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:36:20,423 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:36:20,423 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:36:20,424 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:36:20,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,447 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,448 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,449 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:36:20,450 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:36:20,450 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:36:20,450 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:36:20,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (1/1) ... [2021-12-14 13:36:20,460 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:36:20,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:36:20,478 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) [2021-12-14 13:36:20,497 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 [2021-12-14 13:36:20,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 13:36:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 13:36:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 13:36:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:36:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 13:36:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 13:36:20,509 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2021-12-14 13:36:20,510 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2021-12-14 13:36:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:36:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:36:20,510 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:36:20,510 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:36:20,590 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:36:20,591 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:36:20,721 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:36:20,725 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:36:20,725 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-14 13:36:20,727 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:20 BoogieIcfgContainer [2021-12-14 13:36:20,727 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:36:20,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:36:20,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:36:20,730 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:36:20,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:36:20" (1/3) ... [2021-12-14 13:36:20,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70271717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:36:20, skipping insertion in model container [2021-12-14 13:36:20,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:36:20" (2/3) ... [2021-12-14 13:36:20,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70271717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:36:20, skipping insertion in model container [2021-12-14 13:36:20,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:20" (3/3) ... [2021-12-14 13:36:20,732 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2021-12-14 13:36:20,735 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:36:20,735 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:36:20,764 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:36:20,770 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:36:20,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:36:20,792 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 13:36:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-14 13:36:20,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:20,797 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:20,797 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:20,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:20,805 INFO L85 PathProgramCache]: Analyzing trace with hash -547062782, now seen corresponding path program 1 times [2021-12-14 13:36:20,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:20,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672680332] [2021-12-14 13:36:20,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:20,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:36:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 13:36:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 13:36:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 13:36:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 13:36:21,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:36:21,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672680332] [2021-12-14 13:36:21,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672680332] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:21,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307364071] [2021-12-14 13:36:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:21,223 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:21,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:36:21,239 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) [2021-12-14 13:36:21,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:36:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-14 13:36:21,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:36:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-14 13:36:21,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:36:21,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307364071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:36:21,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 13:36:21,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2021-12-14 13:36:21,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166261441] [2021-12-14 13:36:21,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:36:21,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:36:21,427 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:36:21,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:36:21,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:36:21,449 INFO L87 Difference]: Start difference. First operand has 28 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 13:36:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:36:21,462 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2021-12-14 13:36:21,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:36:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2021-12-14 13:36:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:36:21,468 INFO L225 Difference]: With dead ends: 38 [2021-12-14 13:36:21,468 INFO L226 Difference]: Without dead ends: 23 [2021-12-14 13:36:21,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:36:21,479 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:36:21,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:36:21,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-14 13:36:21,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-14 13:36:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-14 13:36:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-14 13:36:21,507 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2021-12-14 13:36:21,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:36:21,508 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-14 13:36:21,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 13:36:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-14 13:36:21,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 13:36:21,510 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:21,510 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:21,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:36:21,711 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,SelfDestructingSolverStorable0 [2021-12-14 13:36:21,712 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:21,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:21,712 INFO L85 PathProgramCache]: Analyzing trace with hash -745059685, now seen corresponding path program 1 times [2021-12-14 13:36:21,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:21,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012766320] [2021-12-14 13:36:21,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:21,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:36:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 13:36:21,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 13:36:21,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 13:36:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 13:36:21,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:36:21,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012766320] [2021-12-14 13:36:21,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012766320] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:21,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861318598] [2021-12-14 13:36:21,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:21,840 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:21,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:36:21,842 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) [2021-12-14 13:36:21,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:36:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:21,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-14 13:36:21,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:36:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-14 13:36:22,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:36:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 13:36:22,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861318598] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 13:36:22,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 13:36:22,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2021-12-14 13:36:22,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293634538] [2021-12-14 13:36:22,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 13:36:22,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-14 13:36:22,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:36:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-14 13:36:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-14 13:36:22,246 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 13:36:22,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:36:22,343 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-12-14 13:36:22,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-14 13:36:22,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2021-12-14 13:36:22,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:36:22,345 INFO L225 Difference]: With dead ends: 47 [2021-12-14 13:36:22,345 INFO L226 Difference]: Without dead ends: 29 [2021-12-14 13:36:22,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:36:22,346 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:36:22,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 79 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:36:22,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-12-14 13:36:22,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-12-14 13:36:22,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 13:36:22,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-12-14 13:36:22,352 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 37 [2021-12-14 13:36:22,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:36:22,352 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-12-14 13:36:22,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 13:36:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-12-14 13:36:22,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 13:36:22,354 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:22,354 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:22,370 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:36:22,559 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,SelfDestructingSolverStorable1 [2021-12-14 13:36:22,560 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:22,560 INFO L85 PathProgramCache]: Analyzing trace with hash -2113798375, now seen corresponding path program 1 times [2021-12-14 13:36:22,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:22,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084057190] [2021-12-14 13:36:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:22,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:22,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:36:22,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 13:36:22,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 13:36:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 13:36:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:36:22,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:36:22,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084057190] [2021-12-14 13:36:22,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084057190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:36:22,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:36:22,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-14 13:36:22,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128259417] [2021-12-14 13:36:22,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:36:22,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-14 13:36:22,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:36:22,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-14 13:36:22,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-14 13:36:22,719 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 13:36:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:36:22,851 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-12-14 13:36:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:36:22,851 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2021-12-14 13:36:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:36:22,853 INFO L225 Difference]: With dead ends: 43 [2021-12-14 13:36:22,853 INFO L226 Difference]: Without dead ends: 38 [2021-12-14 13:36:22,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-12-14 13:36:22,856 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 33 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 13:36:22,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 76 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 13:36:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-14 13:36:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2021-12-14 13:36:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 13:36:22,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2021-12-14 13:36:22,868 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 37 [2021-12-14 13:36:22,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:36:22,868 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2021-12-14 13:36:22,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 13:36:22,869 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2021-12-14 13:36:22,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 13:36:22,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:22,871 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:22,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-14 13:36:22,872 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:22,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:22,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2056540073, now seen corresponding path program 1 times [2021-12-14 13:36:22,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:22,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420633436] [2021-12-14 13:36:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:22,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:36:22,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 13:36:22,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 13:36:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 13:36:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:22,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-14 13:36:22,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:36:22,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420633436] [2021-12-14 13:36:23,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420633436] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:36:23,000 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:36:23,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-14 13:36:23,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604678125] [2021-12-14 13:36:23,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:36:23,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 13:36:23,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:36:23,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 13:36:23,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-14 13:36:23,006 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 13:36:23,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:36:23,084 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-12-14 13:36:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-14 13:36:23,085 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2021-12-14 13:36:23,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:36:23,092 INFO L225 Difference]: With dead ends: 40 [2021-12-14 13:36:23,092 INFO L226 Difference]: Without dead ends: 32 [2021-12-14 13:36:23,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-12-14 13:36:23,096 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 22 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:36:23,097 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 88 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:36:23,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-14 13:36:23,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-12-14 13:36:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 13:36:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-12-14 13:36:23,104 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 37 [2021-12-14 13:36:23,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:36:23,105 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-12-14 13:36:23,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-14 13:36:23,105 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-12-14 13:36:23,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 13:36:23,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:23,106 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:23,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 13:36:23,106 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:23,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:23,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1005030197, now seen corresponding path program 1 times [2021-12-14 13:36:23,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:23,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185135004] [2021-12-14 13:36:23,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:23,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:23,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:36:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:23,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 13:36:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:23,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 13:36:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:23,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 13:36:23,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:23,367 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 13:36:23,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:36:23,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185135004] [2021-12-14 13:36:23,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185135004] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:23,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165785423] [2021-12-14 13:36:23,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:23,368 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:23,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:36:23,371 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) [2021-12-14 13:36:23,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 13:36:23,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 71 conjunts are in the unsatisfiable core [2021-12-14 13:36:23,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:36:23,536 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 [2021-12-14 13:36:23,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:36:23,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-14 13:36:23,713 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 [2021-12-14 13:36:23,717 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 [2021-12-14 13:36:23,811 INFO L354 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2021-12-14 13:36:23,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 27 [2021-12-14 13:36:23,828 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-14 13:36:23,829 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 17 treesize of output 17 [2021-12-14 13:36:23,932 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 27 treesize of output 15 [2021-12-14 13:36:23,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2021-12-14 13:36:23,974 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:36:23,974 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 29 treesize of output 20 [2021-12-14 13:36:23,996 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 13:36:23,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:36:24,162 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_~head~0.base_42 Int) (v_ArrVal_851 (Array Int Int))) (or (not (= (select |c_#valid| v_~head~0.base_42) 0)) (not (= (select (select (store |c_#memory_int| v_~head~0.base_42 v_ArrVal_851) c_~head~0.base) c_~head~0.offset) 2)))) is different from false [2021-12-14 13:36:24,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165785423] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:24,164 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:36:24,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-12-14 13:36:24,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269539497] [2021-12-14 13:36:24,164 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:36:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 13:36:24,165 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:36:24,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 13:36:24,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=744, Unknown=1, NotChecked=54, Total=870 [2021-12-14 13:36:24,166 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 13:36:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:36:24,652 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2021-12-14 13:36:24,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-14 13:36:24,653 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2021-12-14 13:36:24,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:36:24,653 INFO L225 Difference]: With dead ends: 48 [2021-12-14 13:36:24,653 INFO L226 Difference]: Without dead ends: 40 [2021-12-14 13:36:24,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=1453, Unknown=1, NotChecked=78, Total=1722 [2021-12-14 13:36:24,654 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 51 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:36:24,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 196 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 13:36:24,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-12-14 13:36:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-12-14 13:36:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 13:36:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-12-14 13:36:24,658 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 40 [2021-12-14 13:36:24,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:36:24,658 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-12-14 13:36:24,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 21 states have internal predecessors, (48), 3 states have call successors, (8), 3 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-14 13:36:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-12-14 13:36:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 13:36:24,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:24,659 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:24,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 13:36:24,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:24,863 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:24,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2009254361, now seen corresponding path program 2 times [2021-12-14 13:36:24,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:24,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069593078] [2021-12-14 13:36:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:24,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:24,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:25,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:36:25,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:25,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 13:36:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:25,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 13:36:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:25,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 13:36:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 13:36:25,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:36:25,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069593078] [2021-12-14 13:36:25,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069593078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:25,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729605998] [2021-12-14 13:36:25,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 13:36:25,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:25,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:36:25,381 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:36:25,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 13:36:25,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 13:36:25,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 13:36:25,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 110 conjunts are in the unsatisfiable core [2021-12-14 13:36:25,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:36:25,546 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 [2021-12-14 13:36:25,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:36:25,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-12-14 13:36:25,791 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 [2021-12-14 13:36:25,795 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 [2021-12-14 13:36:25,945 INFO L354 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2021-12-14 13:36:25,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 33 [2021-12-14 13:36:25,954 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 20 treesize of output 22 [2021-12-14 13:36:26,111 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-14 13:36:26,132 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-14 13:36:26,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:36:26,266 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 61 treesize of output 40 [2021-12-14 13:36:26,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:36:26,274 INFO L354 Elim1Store]: treesize reduction 4, result has 77.8 percent of original size [2021-12-14 13:36:26,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 24 [2021-12-14 13:36:26,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-12-14 13:36:26,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:36:26,288 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 22 treesize of output 17 [2021-12-14 13:36:26,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-14 13:36:26,512 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-14 13:36:26,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 49 [2021-12-14 13:36:26,519 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-14 13:36:26,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2021-12-14 13:36:26,567 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:36:26,567 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 15 treesize of output 10 [2021-12-14 13:36:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:36:26,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:36:26,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:36:26,840 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2021-12-14 13:36:26,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:36:26,844 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-12-14 13:36:26,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729605998] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:26,909 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:36:26,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 35 [2021-12-14 13:36:26,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834617608] [2021-12-14 13:36:26,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:36:26,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-14 13:36:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:36:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-14 13:36:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1537, Unknown=1, NotChecked=0, Total=1640 [2021-12-14 13:36:26,912 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 13:36:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:36:27,912 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-12-14 13:36:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-14 13:36:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-12-14 13:36:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:36:27,914 INFO L225 Difference]: With dead ends: 56 [2021-12-14 13:36:27,914 INFO L226 Difference]: Without dead ends: 51 [2021-12-14 13:36:27,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=249, Invalid=2830, Unknown=1, NotChecked=0, Total=3080 [2021-12-14 13:36:27,916 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-14 13:36:27,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 346 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 435 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2021-12-14 13:36:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-14 13:36:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-12-14 13:36:27,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-12-14 13:36:27,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-12-14 13:36:27,920 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 43 [2021-12-14 13:36:27,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:36:27,920 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-12-14 13:36:27,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 30 states have internal predecessors, (58), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-14 13:36:27,920 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-12-14 13:36:27,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 13:36:27,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:27,921 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:27,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 13:36:28,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:28,135 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:28,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:28,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2066512663, now seen corresponding path program 1 times [2021-12-14 13:36:28,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:28,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270275476] [2021-12-14 13:36:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:28,136 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:28,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:36:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:28,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-14 13:36:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:28,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-14 13:36:28,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:28,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-14 13:36:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-14 13:36:28,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:36:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270275476] [2021-12-14 13:36:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270275476] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99514171] [2021-12-14 13:36:28,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:28,438 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:28,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:36:28,439 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-14 13:36:28,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 13:36:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:36:28,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-14 13:36:28,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:36:28,634 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 [2021-12-14 13:36:28,662 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 [2021-12-14 13:36:28,783 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 [2021-12-14 13:36:28,789 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2021-12-14 13:36:28,880 INFO L354 Elim1Store]: treesize reduction 25, result has 45.7 percent of original size [2021-12-14 13:36:28,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 28 [2021-12-14 13:36:28,893 INFO L354 Elim1Store]: treesize reduction 4, result has 71.4 percent of original size [2021-12-14 13:36:28,894 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 17 treesize of output 17 [2021-12-14 13:36:28,972 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 15 treesize of output 7 [2021-12-14 13:36:29,017 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:36:29,017 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2021-12-14 13:36:29,029 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:36:29,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:36:29,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:36:29,161 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2021-12-14 13:36:29,173 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_arrayElimArr_6 (Array Int Int)) (v_~head~0.base_54 Int)) (or (not (= (select |c_#valid| v_~head~0.base_54) 0)) (not (= (select v_arrayElimArr_6 4) c_~head~0.base)) (not (= (select (select (store |c_#memory_$Pointer$.base| v_~head~0.base_54 v_arrayElimArr_6) c_~head~0.base) (+ c_~head~0.offset 4)) 0)))) is different from false [2021-12-14 13:36:29,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99514171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:36:29,174 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:36:29,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2021-12-14 13:36:29,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858987481] [2021-12-14 13:36:29,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:36:29,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-14 13:36:29,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:36:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-14 13:36:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=843, Unknown=1, NotChecked=58, Total=992 [2021-12-14 13:36:29,176 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 13:36:29,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:36:29,971 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2021-12-14 13:36:29,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-12-14 13:36:29,971 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2021-12-14 13:36:29,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:36:29,972 INFO L225 Difference]: With dead ends: 66 [2021-12-14 13:36:29,972 INFO L226 Difference]: Without dead ends: 54 [2021-12-14 13:36:29,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=2456, Unknown=1, NotChecked=104, Total=2970 [2021-12-14 13:36:29,973 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 30 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:36:29,973 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 214 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 350 Invalid, 0 Unknown, 6 Unchecked, 0.2s Time] [2021-12-14 13:36:29,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-14 13:36:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2021-12-14 13:36:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-14 13:36:29,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2021-12-14 13:36:29,980 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 43 [2021-12-14 13:36:29,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:36:29,981 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2021-12-14 13:36:29,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2021-12-14 13:36:29,981 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2021-12-14 13:36:29,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-14 13:36:29,982 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:36:29,982 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:36:30,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 13:36:30,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:36:30,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:36:30,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:36:30,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1384296971, now seen corresponding path program 3 times [2021-12-14 13:36:30,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:36:30,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057649919] [2021-12-14 13:36:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:36:30,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:36:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:36:30,217 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-14 13:36:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-14 13:36:30,251 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-14 13:36:30,251 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-14 13:36:30,252 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-14 13:36:30,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-14 13:36:30,255 INFO L732 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2021-12-14 13:36:30,256 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-14 13:36:30,305 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 01:36:30 BoogieIcfgContainer [2021-12-14 13:36:30,305 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-14 13:36:30,306 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-14 13:36:30,306 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-14 13:36:30,306 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-14 13:36:30,306 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:36:20" (3/4) ... [2021-12-14 13:36:30,307 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-14 13:36:30,340 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-14 13:36:30,340 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-14 13:36:30,341 INFO L158 Benchmark]: Toolchain (without parser) took 10274.07ms. Allocated memory was 94.4MB in the beginning and 144.7MB in the end (delta: 50.3MB). Free memory was 64.5MB in the beginning and 78.2MB in the end (delta: -13.7MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2021-12-14 13:36:30,341 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:36:30,341 INFO L158 Benchmark]: CACSL2BoogieTranslator took 311.33ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 64.1MB in the beginning and 88.5MB in the end (delta: -24.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-14 13:36:30,342 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.90ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 86.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:36:30,342 INFO L158 Benchmark]: Boogie Preprocessor took 25.89ms. Allocated memory is still 119.5MB. Free memory was 86.5MB in the beginning and 85.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:36:30,342 INFO L158 Benchmark]: RCFGBuilder took 277.12ms. Allocated memory is still 119.5MB. Free memory was 85.0MB in the beginning and 73.7MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-14 13:36:30,343 INFO L158 Benchmark]: TraceAbstraction took 9577.47ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 73.1MB in the beginning and 82.4MB in the end (delta: -9.3MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. [2021-12-14 13:36:30,343 INFO L158 Benchmark]: Witness Printer took 34.92ms. Allocated memory is still 144.7MB. Free memory was 82.4MB in the beginning and 78.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-14 13:36:30,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory is still 52.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 311.33ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 64.1MB in the beginning and 88.5MB in the end (delta: -24.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.90ms. Allocated memory is still 119.5MB. Free memory was 88.5MB in the beginning and 86.5MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.89ms. Allocated memory is still 119.5MB. Free memory was 86.5MB in the beginning and 85.0MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 277.12ms. Allocated memory is still 119.5MB. Free memory was 85.0MB in the beginning and 73.7MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 9577.47ms. Allocated memory was 119.5MB in the beginning and 144.7MB in the end (delta: 25.2MB). Free memory was 73.1MB in the beginning and 82.4MB in the end (delta: -9.3MB). Peak memory consumption was 16.4MB. Max. memory is 16.1GB. * Witness Printer took 34.92ms. Allocated memory is still 144.7MB. Free memory was 82.4MB in the beginning and 78.2MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L533] mlist *head; VAL [head={0:0}] [L554] int i; [L555] mlist *mylist, *temp; VAL [head={0:0}] [L556] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={61:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={-1:0}, l={61:64}] [L544] COND TRUE head==((void *)0) [L545] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={61:64}, l={-1:0}] [L550] head = l [L551] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-1:0}, k=2, l={61:64}, l={-1:0}] [L556] RET insert_list(mylist,2) VAL [head={-1:0}, insert_list(mylist,2)=0, mylist={61:64}] [L557] CALL insert_list(mylist,5) VAL [\old(head)=-1, \old(head)=0, \old(k)=5, head={-1:0}, l={61:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, k=5, l={-2:0}, l={61:64}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, k=5, l={-2:0}, l={61:64}] [L550] head = l [L551] return 0; VAL [\old(head)=-1, \old(head)=0, \old(k)=5, \result=0, head={-2:0}, k=5, l={-2:0}, l={61:64}] [L557] RET insert_list(mylist,5) VAL [head={-2:0}, insert_list(mylist,5)=0, mylist={61:64}] [L558] CALL insert_list(mylist,1) VAL [\old(head)=-2, \old(head)=0, \old(k)=1, head={-2:0}, l={61:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=0, \old(head)=-2, \old(k)=1, head={-2:0}, k=1, l={-3:0}, l={61:64}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)=0, \old(head)=-2, \old(k)=1, head={-2:0}, k=1, l={61:64}, l={-3:0}] [L550] head = l [L551] return 0; VAL [\old(head)=0, \old(head)=-2, \old(k)=1, \result=0, head={-3:0}, k=1, l={61:64}, l={-3:0}] [L558] RET insert_list(mylist,1) VAL [head={-3:0}, insert_list(mylist,1)=0, mylist={61:64}] [L559] CALL insert_list(mylist,3) VAL [\old(head)=-3, \old(head)=0, \old(k)=3, head={-3:0}, l={61:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=0, \old(head)=-3, \old(k)=3, head={-3:0}, k=3, l={-4:0}, l={61:64}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)=-3, \old(head)=0, \old(k)=3, head={-3:0}, k=3, l={61:64}, l={-4:0}] [L550] head = l [L551] return 0; VAL [\old(head)=0, \old(head)=-3, \old(k)=3, \result=0, head={-4:0}, k=3, l={61:64}, l={-4:0}] [L559] RET insert_list(mylist,3) VAL [head={-4:0}, insert_list(mylist,3)=0, mylist={61:64}] [L560] CALL, EXPR search_list(head,2) [L535] l = head VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}] [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-3:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-2:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-1:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L536] COND FALSE !(l!=((void *)0) && l->key!=k) [L539] return l; VAL [\old(k)=2, \result={-1:0}, head={-4:0}, k=2, l={-1:0}, l={-4:0}] [L560] RET, EXPR search_list(head,2) [L560] temp = search_list(head,2) [L561] EXPR temp->key [L561] CALL __VERIFIER_assert(temp->key==1) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, head={-4:0}] [L15] reach_error() VAL [\old(cond)=0, cond=0, head={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9.5s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 183 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 183 mSDsluCounter, 1033 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 77 IncrementalHoareTripleChecker+Unchecked, 889 mSDsCounter, 166 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1383 IncrementalHoareTripleChecker+Invalid, 1626 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 166 mSolverCounterUnsat, 144 mSDtfsCounter, 1383 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 468 GetRequests, 269 SyntacticMatches, 14 SemanticMatches, 185 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 3.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=7, InterpolantAutomatonStates: 95, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 24 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 516 NumberOfCodeBlocks, 516 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 494 ConstructedInterpolants, 10 QuantifiedInterpolants, 4897 SizeOfPredicates, 49 NumberOfNonLiveVariables, 1950 ConjunctsInSsa, 253 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 280/432 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-14 13:36:30,377 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE