./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 aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_search-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0 --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 0.2.1-dev-aef121e [2021-11-22 14:52:22,436 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-22 14:52:22,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-22 14:52:22,493 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-22 14:52:22,494 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-22 14:52:22,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-22 14:52:22,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-22 14:52:22,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-22 14:52:22,506 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-22 14:52:22,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-22 14:52:22,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-22 14:52:22,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-22 14:52:22,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-22 14:52:22,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-22 14:52:22,521 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-22 14:52:22,523 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-22 14:52:22,523 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-22 14:52:22,524 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-22 14:52:22,527 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-22 14:52:22,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-22 14:52:22,531 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-22 14:52:22,532 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-22 14:52:22,536 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-22 14:52:22,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-22 14:52:22,546 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-22 14:52:22,546 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-22 14:52:22,547 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-22 14:52:22,548 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-22 14:52:22,548 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-22 14:52:22,550 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-22 14:52:22,550 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-22 14:52:22,551 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-22 14:52:22,552 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-22 14:52:22,553 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-22 14:52:22,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-22 14:52:22,554 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-22 14:52:22,555 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-22 14:52:22,555 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-22 14:52:22,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-22 14:52:22,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-22 14:52:22,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-22 14:52:22,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-22 14:52:22,584 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-22 14:52:22,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-22 14:52:22,587 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-22 14:52:22,588 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-22 14:52:22,595 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-22 14:52:22,595 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-22 14:52:22,595 INFO L138 SettingsManager]: * Use SBE=true [2021-11-22 14:52:22,596 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-22 14:52:22,596 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-22 14:52:22,596 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-22 14:52:22,597 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-22 14:52:22,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-22 14:52:22,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-22 14:52:22,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-22 14:52:22,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-22 14:52:22,599 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-22 14:52:22,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-22 14:52:22,599 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-22 14:52:22,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-22 14:52:22,600 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-22 14:52:22,600 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-22 14:52:22,600 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-22 14:52:22,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:52:22,601 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-22 14:52:22,601 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-22 14:52:22,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-22 14:52:22,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-22 14:52:22,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-22 14:52:22,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-22 14:52:22,603 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-22 14:52:22,604 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-22 14:52:22,604 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-22 14:52:22,604 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2021-11-22 14:52:22,846 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-22 14:52:22,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-22 14:52:22,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-22 14:52:22,871 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-22 14:52:22,872 INFO L275 PluginConnector]: CDTParser initialized [2021-11-22 14:52:22,873 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/../../sv-benchmarks/c/list-properties/list_search-1.i [2021-11-22 14:52:22,946 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/data/f96736812/2c78ef6548aa42d08e2988bb1659f25c/FLAG2f796f32f [2021-11-22 14:52:23,450 INFO L306 CDTParser]: Found 1 translation units. [2021-11-22 14:52:23,451 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/sv-benchmarks/c/list-properties/list_search-1.i [2021-11-22 14:52:23,464 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/data/f96736812/2c78ef6548aa42d08e2988bb1659f25c/FLAG2f796f32f [2021-11-22 14:52:23,774 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/data/f96736812/2c78ef6548aa42d08e2988bb1659f25c [2021-11-22 14:52:23,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-22 14:52:23,778 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-22 14:52:23,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-22 14:52:23,786 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-22 14:52:23,789 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-22 14:52:23,790 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:52:23" (1/1) ... [2021-11-22 14:52:23,791 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5abf2c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:23, skipping insertion in model container [2021-11-22 14:52:23,791 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 02:52:23" (1/1) ... [2021-11-22 14:52:23,797 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-22 14:52:23,837 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-22 14:52:24,030 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-11-22 14:52:24,224 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:52:24,233 INFO L203 MainTranslator]: Completed pre-run [2021-11-22 14:52:24,246 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2021-11-22 14:52:24,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-22 14:52:24,316 INFO L208 MainTranslator]: Completed translation [2021-11-22 14:52:24,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24 WrapperNode [2021-11-22 14:52:24,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-22 14:52:24,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-22 14:52:24,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-22 14:52:24,319 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-22 14:52:24,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,379 INFO L137 Inliner]: procedures = 125, calls = 22, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 118 [2021-11-22 14:52:24,380 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-22 14:52:24,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-22 14:52:24,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-22 14:52:24,381 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-22 14:52:24,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,429 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-22 14:52:24,430 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-22 14:52:24,430 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-22 14:52:24,430 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-22 14:52:24,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (1/1) ... [2021-11-22 14:52:24,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-22 14:52:24,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:52:24,476 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-22 14:52:24,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-22 14:52:24,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-22 14:52:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-22 14:52:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-22 14:52:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-22 14:52:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-22 14:52:24,533 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-22 14:52:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-22 14:52:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-22 14:52:24,534 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-22 14:52:24,534 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-22 14:52:24,684 INFO L236 CfgBuilder]: Building ICFG [2021-11-22 14:52:24,694 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-22 14:52:25,006 INFO L277 CfgBuilder]: Performing block encoding [2021-11-22 14:52:25,012 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-22 14:52:25,012 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-22 14:52:25,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:52:25 BoogieIcfgContainer [2021-11-22 14:52:25,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-22 14:52:25,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-22 14:52:25,017 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-22 14:52:25,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-22 14:52:25,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 02:52:23" (1/3) ... [2021-11-22 14:52:25,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5e1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:52:25, skipping insertion in model container [2021-11-22 14:52:25,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 02:52:24" (2/3) ... [2021-11-22 14:52:25,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f5e1df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 02:52:25, skipping insertion in model container [2021-11-22 14:52:25,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:52:25" (3/3) ... [2021-11-22 14:52:25,025 INFO L111 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2021-11-22 14:52:25,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-22 14:52:25,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-22 14:52:25,102 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-22 14:52:25,109 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 [2021-11-22 14:52:25,109 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-22 14:52:25,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:25,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-22 14:52:25,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:25,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:25,135 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:25,141 INFO L85 PathProgramCache]: Analyzing trace with hash -332178203, now seen corresponding path program 1 times [2021-11-22 14:52:25,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:25,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135851668] [2021-11-22 14:52:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:25,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:25,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:25,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:25,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135851668] [2021-11-22 14:52:25,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135851668] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:52:25,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:52:25,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-22 14:52:25,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835481835] [2021-11-22 14:52:25,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:52:25,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-22 14:52:25,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:25,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-22 14:52:25,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-22 14:52:25,478 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.44) internal successors, (36), 26 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:25,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:25,568 INFO L93 Difference]: Finished difference Result 49 states and 67 transitions. [2021-11-22 14:52:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-22 14:52:25,571 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-22 14:52:25,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:25,579 INFO L225 Difference]: With dead ends: 49 [2021-11-22 14:52:25,579 INFO L226 Difference]: Without dead ends: 22 [2021-11-22 14:52:25,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-22 14:52:25,586 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:25,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:52:25,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-22 14:52:25,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-22 14:52:25,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:25,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-11-22 14:52:25,629 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2021-11-22 14:52:25,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:25,630 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-11-22 14:52:25,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:25,631 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-11-22 14:52:25,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 14:52:25,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:25,633 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:25,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-22 14:52:25,634 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:25,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:25,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1321983588, now seen corresponding path program 1 times [2021-11-22 14:52:25,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:25,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545079849] [2021-11-22 14:52:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:25,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:25,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:25,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545079849] [2021-11-22 14:52:25,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545079849] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:52:25,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:52:25,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-22 14:52:25,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115420460] [2021-11-22 14:52:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:52:25,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-22 14:52:25,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:25,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-22 14:52:25,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-22 14:52:25,752 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:25,843 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-11-22 14:52:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:52:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 14:52:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:25,845 INFO L225 Difference]: With dead ends: 38 [2021-11-22 14:52:25,845 INFO L226 Difference]: Without dead ends: 30 [2021-11-22 14:52:25,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-22 14:52:25,847 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:25,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 30 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:52:25,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-22 14:52:25,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2021-11-22 14:52:25,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-11-22 14:52:25,855 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2021-11-22 14:52:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:25,855 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-11-22 14:52:25,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:25,856 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-11-22 14:52:25,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-22 14:52:25,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:25,857 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:25,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-22 14:52:25,857 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:25,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1379241890, now seen corresponding path program 1 times [2021-11-22 14:52:25,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:25,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216920035] [2021-11-22 14:52:25,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:25,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:25,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:25,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:25,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216920035] [2021-11-22 14:52:25,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216920035] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-22 14:52:25,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-22 14:52:25,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-22 14:52:25,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905648550] [2021-11-22 14:52:25,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-22 14:52:25,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-22 14:52:25,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-22 14:52:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-22 14:52:25,985 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:26,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:26,183 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-11-22 14:52:26,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-22 14:52:26,183 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-22 14:52:26,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:26,186 INFO L225 Difference]: With dead ends: 30 [2021-11-22 14:52:26,186 INFO L226 Difference]: Without dead ends: 25 [2021-11-22 14:52:26,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-11-22 14:52:26,191 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:26,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 28 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:52:26,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-22 14:52:26,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-22 14:52:26,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-22 14:52:26,198 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2021-11-22 14:52:26,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:26,198 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-22 14:52:26,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:26,199 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-22 14:52:26,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 14:52:26,199 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:26,200 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:26,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-22 14:52:26,201 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:26,202 INFO L85 PathProgramCache]: Analyzing trace with hash -633881513, now seen corresponding path program 1 times [2021-11-22 14:52:26,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:26,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440916427] [2021-11-22 14:52:26,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:26,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:26,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440916427] [2021-11-22 14:52:26,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440916427] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:52:26,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333509588] [2021-11-22 14:52:26,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:26,441 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:26,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:52:26,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:52:26,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-22 14:52:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:26,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-22 14:52:26,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:52:26,731 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 18 treesize of output 14 [2021-11-22 14:52:26,792 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 16 treesize of output 8 [2021-11-22 14:52:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:26,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:52:26,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:26,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333509588] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:52:26,891 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:52:26,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 16 [2021-11-22 14:52:26,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984511226] [2021-11-22 14:52:26,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:52:26,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-22 14:52:26,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:26,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-22 14:52:26,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-22 14:52:26,894 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:27,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:27,225 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-11-22 14:52:27,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-22 14:52:27,225 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-22 14:52:27,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:27,229 INFO L225 Difference]: With dead ends: 45 [2021-11-22 14:52:27,229 INFO L226 Difference]: Without dead ends: 37 [2021-11-22 14:52:27,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:52:27,231 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 157 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:27,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 33 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-22 14:52:27,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-22 14:52:27,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2021-11-22 14:52:27,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:27,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2021-11-22 14:52:27,249 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2021-11-22 14:52:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:27,250 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2021-11-22 14:52:27,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2021-11-22 14:52:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-22 14:52:27,251 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:27,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:27,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-22 14:52:27,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:27,467 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:27,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash -691139815, now seen corresponding path program 1 times [2021-11-22 14:52:27,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:27,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232575529] [2021-11-22 14:52:27,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:27,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:27,761 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232575529] [2021-11-22 14:52:27,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232575529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:52:27,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012682013] [2021-11-22 14:52:27,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:27,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:27,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:52:27,763 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:52:27,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-22 14:52:27,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:27,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-22 14:52:27,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:52:27,871 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 [2021-11-22 14:52:27,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:52:27,896 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 22 treesize of output 7 [2021-11-22 14:52:27,940 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 14:52:27,941 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 11 treesize of output 11 [2021-11-22 14:52:27,951 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 19 treesize of output 18 [2021-11-22 14:52:28,015 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 51 treesize of output 47 [2021-11-22 14:52:28,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:52:28,042 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-22 14:52:28,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 34 [2021-11-22 14:52:28,054 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 [2021-11-22 14:52:28,214 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 41 treesize of output 29 [2021-11-22 14:52:28,221 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 26 treesize of output 18 [2021-11-22 14:52:28,301 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 14:52:28,301 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 [2021-11-22 14:52:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:28,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:52:29,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:29,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012682013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:52:29,024 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:52:29,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2021-11-22 14:52:29,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625382814] [2021-11-22 14:52:29,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:52:29,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-22 14:52:29,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:29,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-22 14:52:29,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2021-11-22 14:52:29,026 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:29,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:29,500 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-11-22 14:52:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-22 14:52:29,501 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-22 14:52:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:29,502 INFO L225 Difference]: With dead ends: 33 [2021-11-22 14:52:29,502 INFO L226 Difference]: Without dead ends: 28 [2021-11-22 14:52:29,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=1036, Unknown=0, NotChecked=0, Total=1190 [2021-11-22 14:52:29,505 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:29,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 84 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 296 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2021-11-22 14:52:29,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-22 14:52:29,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-22 14:52:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:29,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-22 14:52:29,517 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2021-11-22 14:52:29,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:29,517 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-22 14:52:29,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:29,518 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-22 14:52:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 14:52:29,520 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:29,521 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:29,557 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-22 14:52:29,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:29,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:29,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1263868996, now seen corresponding path program 2 times [2021-11-22 14:52:29,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:29,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247533175] [2021-11-22 14:52:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:29,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:30,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:30,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247533175] [2021-11-22 14:52:30,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247533175] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:52:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406402589] [2021-11-22 14:52:30,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:52:30,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:30,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:52:30,050 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:52:30,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-22 14:52:30,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:52:30,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:52:30,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-22 14:52:30,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:52:30,229 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 [2021-11-22 14:52:30,243 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 18 treesize of output 14 [2021-11-22 14:52:30,272 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 24 treesize of output 12 [2021-11-22 14:52:30,283 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 14:52:30,284 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 11 treesize of output 11 [2021-11-22 14:52:30,300 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 [2021-11-22 14:52:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:52:30,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:52:30,319 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-22 14:52:30,319 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 1 case distinctions, treesize of input 29 treesize of output 32 [2021-11-22 14:52:30,457 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 42 treesize of output 34 [2021-11-22 14:52:30,534 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 14:52:30,534 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 [2021-11-22 14:52:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:30,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:52:31,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25 [2021-11-22 14:52:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:31,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406402589] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:52:31,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:52:31,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2021-11-22 14:52:31,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141529330] [2021-11-22 14:52:31,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:52:31,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-22 14:52:31,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:31,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-22 14:52:31,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-11-22 14:52:31,028 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:31,391 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-22 14:52:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-22 14:52:31,391 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 14:52:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:31,392 INFO L225 Difference]: With dead ends: 44 [2021-11-22 14:52:31,392 INFO L226 Difference]: Without dead ends: 36 [2021-11-22 14:52:31,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=160, Invalid=896, Unknown=0, NotChecked=0, Total=1056 [2021-11-22 14:52:31,394 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:31,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 108 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 214 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-11-22 14:52:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-22 14:52:31,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-11-22 14:52:31,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:31,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-22 14:52:31,400 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2021-11-22 14:52:31,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:31,400 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-22 14:52:31,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.96) internal successors, (49), 25 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:31,401 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-22 14:52:31,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-22 14:52:31,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:31,402 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:31,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-22 14:52:31,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:31,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:31,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:31,623 INFO L85 PathProgramCache]: Analyzing trace with hash -1321127298, now seen corresponding path program 2 times [2021-11-22 14:52:31,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:31,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864364862] [2021-11-22 14:52:31,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:31,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:31,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:32,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864364862] [2021-11-22 14:52:32,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864364862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:52:32,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034208803] [2021-11-22 14:52:32,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-22 14:52:32,057 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:32,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:52:32,060 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:52:32,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-22 14:52:32,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-22 14:52:32,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:52:32,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-22 14:52:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:52:32,494 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 [2021-11-22 14:52:32,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:52:32,544 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 26 treesize of output 11 [2021-11-22 14:52:32,629 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-22 14:52:32,629 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 19 treesize of output 22 [2021-11-22 14:52:32,662 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-22 14:52:32,662 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 17 treesize of output 21 [2021-11-22 14:52:32,747 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 56 treesize of output 52 [2021-11-22 14:52:32,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:52:32,760 INFO L354 Elim1Store]: treesize reduction 49, result has 21.0 percent of original size [2021-11-22 14:52:32,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 45 [2021-11-22 14:52:32,774 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 [2021-11-22 14:52:32,897 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 23 treesize of output 11 [2021-11-22 14:52:32,915 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-22 14:52:32,915 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 65 treesize of output 64 [2021-11-22 14:52:32,924 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 41 [2021-11-22 14:52:32,939 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-11-22 14:52:32,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 48 [2021-11-22 14:52:33,044 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:52:33,057 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-22 14:52:33,058 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 1 case distinctions, treesize of input 109 treesize of output 104 [2021-11-22 14:52:33,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:52:33,076 INFO L354 Elim1Store]: treesize reduction 65, result has 20.7 percent of original size [2021-11-22 14:52:33,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 129 treesize of output 113 [2021-11-22 14:52:33,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:52:33,093 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-22 14:52:33,093 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 1 case distinctions, treesize of input 91 treesize of output 94 [2021-11-22 14:52:33,500 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-11-22 14:52:33,500 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 96 treesize of output 56 [2021-11-22 14:52:33,514 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-22 14:52:33,514 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 47 treesize of output 37 [2021-11-22 14:52:33,592 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 14:52:33,592 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 31 treesize of output 26 [2021-11-22 14:52:33,641 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:33,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:52:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:47,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034208803] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:52:47,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:52:47,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 42 [2021-11-22 14:52:47,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610437320] [2021-11-22 14:52:47,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:52:47,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-22 14:52:47,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:52:47,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-22 14:52:47,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1598, Unknown=4, NotChecked=0, Total=1722 [2021-11-22 14:52:47,836 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:48,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:52:48,993 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2021-11-22 14:52:48,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-22 14:52:48,999 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-22 14:52:48,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:52:49,000 INFO L225 Difference]: With dead ends: 36 [2021-11-22 14:52:49,000 INFO L226 Difference]: Without dead ends: 31 [2021-11-22 14:52:49,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=230, Invalid=2522, Unknown=4, NotChecked=0, Total=2756 [2021-11-22 14:52:49,003 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 27 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-22 14:52:49,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 160 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 427 Invalid, 0 Unknown, 167 Unchecked, 0.4s Time] [2021-11-22 14:52:49,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-22 14:52:49,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-22 14:52:49,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:49,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2021-11-22 14:52:49,009 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 27 [2021-11-22 14:52:49,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:52:49,010 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2021-11-22 14:52:49,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5952380952380953) internal successors, (67), 42 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:52:49,010 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2021-11-22 14:52:49,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 14:52:49,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:52:49,011 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:52:49,033 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-22 14:52:49,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:49,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:52:49,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:52:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash -213891529, now seen corresponding path program 3 times [2021-11-22 14:52:49,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:52:49,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818436888] [2021-11-22 14:52:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:52:49,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:52:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-22 14:52:49,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:49,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-22 14:52:49,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818436888] [2021-11-22 14:52:49,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818436888] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-22 14:52:49,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197260332] [2021-11-22 14:52:49,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-22 14:52:49,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-22 14:52:49,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 [2021-11-22 14:52:49,715 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-22 14:52:49,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-22 14:52:50,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-22 14:52:50,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-22 14:52:50,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-22 14:52:50,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-22 14:52:50,618 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 18 treesize of output 14 [2021-11-22 14:52:50,688 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 24 treesize of output 12 [2021-11-22 14:52:50,696 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 [2021-11-22 14:52:50,742 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 [2021-11-22 14:52:50,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-22 14:52:50,755 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:52:50,769 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-22 14:52:50,769 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 1 case distinctions, treesize of input 25 treesize of output 32 [2021-11-22 14:52:50,878 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 23 treesize of output 11 [2021-11-22 14:52:50,890 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-22 14:52:50,890 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 11 treesize of output 11 [2021-11-22 14:52:50,902 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-22 14:52:50,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-11-22 14:52:50,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:52:51,028 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-22 14:52:51,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 89 [2021-11-22 14:52:51,037 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-22 14:52:51,067 INFO L354 Elim1Store]: treesize reduction 35, result has 27.1 percent of original size [2021-11-22 14:52:51,067 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 1 case distinctions, treesize of input 105 treesize of output 108 [2021-11-22 14:52:51,451 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-22 14:52:51,451 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 85 treesize of output 63 [2021-11-22 14:52:51,575 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-11-22 14:52:51,575 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 5 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 38 [2021-11-22 14:52:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:52:51,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-22 14:52:54,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 93 treesize of output 91 [2021-11-22 14:52:56,398 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_insert_list_~l#1.base_35| Int) (|v_ULTIMATE.start_insert_list_~l#1.base_36| Int) (v_DerPreprocessor_18 Int)) (or (= |v_ULTIMATE.start_insert_list_~l#1.base_36| |v_ULTIMATE.start_insert_list_~l#1.base_35|) (= |v_ULTIMATE.start_insert_list_~l#1.base_36| 0) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36|) 0 v_DerPreprocessor_22) 4 c_~head~0.base)))) (store .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35| (store (store (select .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35|) 0 v_DerPreprocessor_18) 4 |v_ULTIMATE.start_insert_list_~l#1.base_36|))))) (select .cse0 (select (select .cse0 |v_ULTIMATE.start_insert_list_~l#1.base_36|) 4))) (+ c_~head~0.offset 4)) 0)))) is different from false [2021-11-22 14:52:58,429 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_insert_list_~l#1.base_35| Int) (|v_ULTIMATE.start_insert_list_~l#1.base_36| Int) (v_DerPreprocessor_18 Int)) (or (= |v_ULTIMATE.start_insert_list_~l#1.base_36| |v_ULTIMATE.start_insert_list_~l#1.base_35|) (= |v_ULTIMATE.start_insert_list_~l#1.base_36| 0) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36|) 0 v_DerPreprocessor_22) 4 |c_ULTIMATE.start_insert_list_~l#1.base|)))) (store .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35| (store (store (select .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35|) 0 v_DerPreprocessor_18) 4 |v_ULTIMATE.start_insert_list_~l#1.base_36|))))) (select .cse0 (select (select .cse0 |v_ULTIMATE.start_insert_list_~l#1.base_36|) 4))) (+ |c_ULTIMATE.start_insert_list_~l#1.offset| 4)) 0)))) is different from false [2021-11-22 14:52:58,494 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-22 14:52:58,495 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 1255398 treesize of output 1243118 [2021-11-22 14:55:05,454 WARN L227 SmtUtils]: Spent 2.12m on a formula simplification. DAG size of input: 863 DAG size of output: 857 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-22 14:55:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-22 14:55:40,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197260332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-22 14:55:40,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-22 14:55:40,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 43 [2021-11-22 14:55:40,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829621970] [2021-11-22 14:55:40,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-22 14:55:40,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-22 14:55:40,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-22 14:55:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-22 14:55:40,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1486, Unknown=3, NotChecked=158, Total=1806 [2021-11-22 14:55:40,334 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:55:42,555 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~head~0.offset 0) (= |c_ULTIMATE.start_insert_list_~l#1.offset| 0) (= (select |c_#valid| |c_ULTIMATE.start_insert_list_~l#1.base|) 1) (not (= (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_insert_list_~l#1.base|) (+ |c_ULTIMATE.start_insert_list_~l#1.offset| 4)) 0)) (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_insert_list_~l#1.base_35| Int) (|v_ULTIMATE.start_insert_list_~l#1.base_36| Int) (v_DerPreprocessor_18 Int)) (or (= |v_ULTIMATE.start_insert_list_~l#1.base_36| |v_ULTIMATE.start_insert_list_~l#1.base_35|) (= |v_ULTIMATE.start_insert_list_~l#1.base_36| 0) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36|) 0 v_DerPreprocessor_22) 4 |c_ULTIMATE.start_insert_list_~l#1.base|)))) (store .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35| (store (store (select .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35|) 0 v_DerPreprocessor_18) 4 |v_ULTIMATE.start_insert_list_~l#1.base_36|))))) (select .cse0 (select (select .cse0 |v_ULTIMATE.start_insert_list_~l#1.base_36|) 4))) (+ |c_ULTIMATE.start_insert_list_~l#1.offset| 4)) 0))))) is different from false [2021-11-22 14:55:44,578 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_insert_list_~l#1.offset| 4))) (let ((.cse1 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_insert_list_~l#1.base|) .cse0))) (and (not (= |c_ULTIMATE.start_insert_list_~l#1.base| c_~head~0.base)) (= (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_insert_list_~l#1.base|) .cse0) 0) (not (= (select (select |c_#memory_$Pointer$.base| .cse1) 4) 0)) (= c_~head~0.offset 0) (= |c_ULTIMATE.start_insert_list_~l#1.offset| 0) (not (= (select (select |c_#memory_$Pointer$.base| c_~head~0.base) 4) 0)) (= (select |c_#valid| |c_ULTIMATE.start_insert_list_~l#1.base|) 1) (= (select |c_#valid| c_~head~0.base) 1) (not (= .cse1 0)) (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_insert_list_~l#1.base_35| Int) (|v_ULTIMATE.start_insert_list_~l#1.base_36| Int) (v_DerPreprocessor_18 Int)) (or (= |v_ULTIMATE.start_insert_list_~l#1.base_36| |v_ULTIMATE.start_insert_list_~l#1.base_35|) (= |v_ULTIMATE.start_insert_list_~l#1.base_36| 0) (not (= (select (let ((.cse2 (let ((.cse3 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36|) 0 v_DerPreprocessor_22) 4 |c_ULTIMATE.start_insert_list_~l#1.base|)))) (store .cse3 |v_ULTIMATE.start_insert_list_~l#1.base_35| (store (store (select .cse3 |v_ULTIMATE.start_insert_list_~l#1.base_35|) 0 v_DerPreprocessor_18) 4 |v_ULTIMATE.start_insert_list_~l#1.base_36|))))) (select .cse2 (select (select .cse2 |v_ULTIMATE.start_insert_list_~l#1.base_36|) 4))) (+ |c_ULTIMATE.start_insert_list_~l#1.offset| 4)) 0))))))) is different from false [2021-11-22 14:55:46,589 WARN L838 $PredicateComparison]: unable to prove that (and (= c_~head~0.offset 0) (not (= (select (select |c_#memory_$Pointer$.base| c_~head~0.base) 4) 0)) (= (select |c_#valid| c_~head~0.base) 1) (forall ((v_DerPreprocessor_22 Int) (|v_ULTIMATE.start_insert_list_~l#1.base_35| Int) (|v_ULTIMATE.start_insert_list_~l#1.base_36| Int) (v_DerPreprocessor_18 Int)) (or (= |v_ULTIMATE.start_insert_list_~l#1.base_36| |v_ULTIMATE.start_insert_list_~l#1.base_35|) (= |v_ULTIMATE.start_insert_list_~l#1.base_36| 0) (not (= (select (let ((.cse0 (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36| (store (store (select |c_#memory_$Pointer$.base| |v_ULTIMATE.start_insert_list_~l#1.base_36|) 0 v_DerPreprocessor_22) 4 c_~head~0.base)))) (store .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35| (store (store (select .cse1 |v_ULTIMATE.start_insert_list_~l#1.base_35|) 0 v_DerPreprocessor_18) 4 |v_ULTIMATE.start_insert_list_~l#1.base_36|))))) (select .cse0 (select (select .cse0 |v_ULTIMATE.start_insert_list_~l#1.base_36|) 4))) (+ c_~head~0.offset 4)) 0))))) is different from false [2021-11-22 14:55:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-22 14:55:47,086 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2021-11-22 14:55:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-22 14:55:47,087 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-22 14:55:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-22 14:55:47,087 INFO L225 Difference]: With dead ends: 45 [2021-11-22 14:55:47,088 INFO L226 Difference]: Without dead ends: 37 [2021-11-22 14:55:47,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=381, Invalid=2285, Unknown=6, NotChecked=520, Total=3192 [2021-11-22 14:55:47,090 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-22 14:55:47,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 155 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 191 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2021-11-22 14:55:47,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-22 14:55:47,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2021-11-22 14:55:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:55:47,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2021-11-22 14:55:47,097 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 30 [2021-11-22 14:55:47,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-22 14:55:47,097 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2021-11-22 14:55:47,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.627906976744186) internal successors, (70), 43 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-22 14:55:47,098 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2021-11-22 14:55:47,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-22 14:55:47,099 INFO L506 BasicCegarLoop]: Found error trace [2021-11-22 14:55:47,099 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-22 14:55:47,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-22 14:55:47,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-22 14:55:47,319 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-22 14:55:47,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-22 14:55:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash -271149831, now seen corresponding path program 3 times [2021-11-22 14:55:47,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-22 14:55:47,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275351993] [2021-11-22 14:55:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-22 14:55:47,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-22 14:55:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:55:47,344 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-22 14:55:47,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-22 14:55:47,400 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-22 14:55:47,400 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-22 14:55:47,401 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-22 14:55:47,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-22 14:55:47,406 INFO L732 BasicCegarLoop]: Path program histogram: [3, 3, 1, 1, 1] [2021-11-22 14:55:47,409 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-22 14:55:47,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.11 02:55:47 BoogieIcfgContainer [2021-11-22 14:55:47,455 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-22 14:55:47,456 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-22 14:55:47,456 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-22 14:55:47,456 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-22 14:55:47,457 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 02:52:25" (3/4) ... [2021-11-22 14:55:47,458 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-22 14:55:47,515 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/witness.graphml [2021-11-22 14:55:47,515 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-22 14:55:47,516 INFO L158 Benchmark]: Toolchain (without parser) took 203738.48ms. Allocated memory was 107.0MB in the beginning and 287.3MB in the end (delta: 180.4MB). Free memory was 75.3MB in the beginning and 218.9MB in the end (delta: -143.6MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2021-11-22 14:55:47,517 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory was 59.8MB in the beginning and 59.7MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-22 14:55:47,517 INFO L158 Benchmark]: CACSL2BoogieTranslator took 531.99ms. Allocated memory is still 107.0MB. Free memory was 75.0MB in the beginning and 72.8MB in the end (delta: 2.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-11-22 14:55:47,517 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.73ms. Allocated memory is still 107.0MB. Free memory was 72.8MB in the beginning and 70.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:55:47,518 INFO L158 Benchmark]: Boogie Preprocessor took 48.30ms. Allocated memory is still 107.0MB. Free memory was 70.7MB in the beginning and 69.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-22 14:55:47,518 INFO L158 Benchmark]: RCFGBuilder took 585.43ms. Allocated memory is still 107.0MB. Free memory was 69.0MB in the beginning and 54.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-22 14:55:47,518 INFO L158 Benchmark]: TraceAbstraction took 202438.36ms. Allocated memory was 107.0MB in the beginning and 287.3MB in the end (delta: 180.4MB). Free memory was 53.9MB in the beginning and 222.1MB in the end (delta: -168.1MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-11-22 14:55:47,519 INFO L158 Benchmark]: Witness Printer took 59.86ms. Allocated memory is still 287.3MB. Free memory was 222.1MB in the beginning and 218.9MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-22 14:55:47,521 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 107.0MB. Free memory was 59.8MB in the beginning and 59.7MB in the end (delta: 92.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 531.99ms. Allocated memory is still 107.0MB. Free memory was 75.0MB in the beginning and 72.8MB in the end (delta: 2.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.73ms. Allocated memory is still 107.0MB. Free memory was 72.8MB in the beginning and 70.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 48.30ms. Allocated memory is still 107.0MB. Free memory was 70.7MB in the beginning and 69.0MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 585.43ms. Allocated memory is still 107.0MB. Free memory was 69.0MB in the beginning and 54.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 202438.36ms. Allocated memory was 107.0MB in the beginning and 287.3MB in the end (delta: 180.4MB). Free memory was 53.9MB in the beginning and 222.1MB in the end (delta: -168.1MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Witness Printer took 59.86ms. Allocated memory is still 287.3MB. Free memory was 222.1MB in the beginning and 218.9MB in the end (delta: 3.1MB). 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; [L556] CALL insert_list(mylist,2) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(k)=2, head={0:0}, k=2, l={51:67}, l={-1:0}] [L544] COND TRUE head==((void *)0) [L545] l->next = ((void *)0) VAL [\old(k)=2, head={0:0}, k=2, l={-1:0}, l={51:67}] [L550] head = l [L551] return 0; VAL [\old(k)=2, \result=0, head={-1:0}, k=2, l={51:67}, l={-1:0}] [L556] RET insert_list(mylist,2) [L557] CALL insert_list(mylist,5) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(k)=5, head={-1:0}, k=5, l={-5:0}, l={51:67}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(k)=5, head={-1:0}, k=5, l={51:67}, l={-5:0}] [L550] head = l [L551] return 0; VAL [\old(k)=5, \result=0, head={-5:0}, k=5, l={-5:0}, l={51:67}] [L557] RET insert_list(mylist,5) [L558] CALL insert_list(mylist,1) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(k)=1, head={-5:0}, k=1, l={51:67}, l={-3:0}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(k)=1, head={-5:0}, k=1, l={-3:0}, l={51:67}] [L550] head = l [L551] return 0; VAL [\old(k)=1, \result=0, head={-3:0}, k=1, l={-3:0}, l={51:67}] [L558] RET insert_list(mylist,1) [L559] CALL insert_list(mylist,3) [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(k)=3, head={-3:0}, k=3, l={-4:0}, l={51:67}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(k)=3, head={-3:0}, k=3, l={51:67}, l={-4:0}] [L550] head = l [L551] return 0; VAL [\old(k)=3, \result=0, head={-4:0}, k=3, l={-4:0}, l={51:67}] [L559] RET insert_list(mylist,3) [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={-5:0}, l={-4:0}, 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={-4:0}, l={-1:0}] [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 1 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 202.3s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 9.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 430 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 430 mSDsluCounter, 621 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 431 IncrementalHoareTripleChecker+Unchecked, 540 mSDsCounter, 268 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1357 IncrementalHoareTripleChecker+Invalid, 2056 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 268 mSolverCounterUnsat, 81 mSDtfsCounter, 1357 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 418 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 212 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 1776 ImplicationChecksByTransitivity, 25.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=33occurred in iteration=8, InterpolantAutomatonStates: 92, 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, 8 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 189.3s InterpolantComputationTime, 355 NumberOfCodeBlocks, 355 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 439 ConstructedInterpolants, 33 QuantifiedInterpolants, 6632 SizeOfPredicates, 90 NumberOfNonLiveVariables, 1046 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 18 InterpolantComputations, 3 PerfectInterpolantSequences, 18/126 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! [2021-11-22 14:55:47,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ef5b988-38f8-4298-824f-bcb2fcba3897/bin/uautomizer-w2VwFs6gM0/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