./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be --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 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:02:50,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:02:50,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:02:50,496 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:02:50,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:02:50,498 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:02:50,500 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:02:50,503 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:02:50,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:02:50,506 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:02:50,507 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:02:50,509 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:02:50,510 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:02:50,511 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:02:50,513 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:02:50,514 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:02:50,515 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:02:50,517 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:02:50,519 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:02:50,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:02:50,524 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:02:50,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:02:50,528 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:02:50,529 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:02:50,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:02:50,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:02:50,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:02:50,536 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:02:50,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:02:50,538 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:02:50,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:02:50,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:02:50,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:02:50,541 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:02:50,543 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:02:50,543 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:02:50,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:02:50,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:02:50,546 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:02:50,547 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:02:50,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:02:50,549 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:02:50,575 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:02:50,575 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:02:50,576 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:02:50,576 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:02:50,577 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:02:50,578 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:02:50,578 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:02:50,578 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:02:50,579 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:02:50,579 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:02:50,579 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:02:50,580 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:02:50,580 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:02:50,580 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:02:50,580 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:02:50,581 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:02:50,581 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:02:50,581 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:02:50,581 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:02:50,581 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:02:50,581 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:02:50,582 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:02:50,582 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:02:50,582 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:02:50,582 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:02:50,582 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:02:50,582 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:02:50,583 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:02:50,583 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:02:50,583 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:02:50,583 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:02:50,584 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:02:50,584 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_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 [2021-10-21 19:02:50,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:02:51,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:02:51,006 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:02:51,007 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:02:51,008 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:02:51,009 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-21 19:02:51,089 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/data/11358c928/84a1f24485024083907c2623165e43e4/FLAGa9671d055 [2021-10-21 19:02:51,657 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:02:51,657 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-21 19:02:51,670 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/data/11358c928/84a1f24485024083907c2623165e43e4/FLAGa9671d055 [2021-10-21 19:02:51,960 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/data/11358c928/84a1f24485024083907c2623165e43e4 [2021-10-21 19:02:51,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:02:51,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:02:51,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:02:51,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:02:51,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:02:51,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:02:51" (1/1) ... [2021-10-21 19:02:51,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b75cdda and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:51, skipping insertion in model container [2021-10-21 19:02:51,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:02:51" (1/1) ... [2021-10-21 19:02:51,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:02:52,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:02:52,348 WARN L228 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_eae05953-69e1-49d3-81fa-89e054cbad51/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-21 19:02:52,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:02:52,368 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:02:52,445 WARN L228 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_eae05953-69e1-49d3-81fa-89e054cbad51/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-21 19:02:52,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:02:52,484 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:02:52,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52 WrapperNode [2021-10-21 19:02:52,485 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:02:52,486 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:02:52,487 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:02:52,487 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:02:52,495 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,527 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:02:52,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:02:52,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:02:52,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:02:52,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,577 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,585 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,619 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,622 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:02:52,628 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:02:52,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:02:52,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:02:52,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (1/1) ... [2021-10-21 19:02:52,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:02:52,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:02:52,677 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:02:52,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:02:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-21 19:02:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-21 19:02:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-21 19:02:52,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-21 19:02:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:02:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-21 19:02:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-21 19:02:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:02:52,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:02:52,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:02:53,112 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:02:53,112 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-21 19:02:53,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:02:53 BoogieIcfgContainer [2021-10-21 19:02:53,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:02:53,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:02:53,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:02:53,130 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:02:53,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:02:51" (1/3) ... [2021-10-21 19:02:53,131 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e849e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:02:53, skipping insertion in model container [2021-10-21 19:02:53,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:02:52" (2/3) ... [2021-10-21 19:02:53,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e849e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:02:53, skipping insertion in model container [2021-10-21 19:02:53,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:02:53" (3/3) ... [2021-10-21 19:02:53,133 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-10-21 19:02:53,138 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:02:53,139 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:02:53,191 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:02:53,197 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 [2021-10-21 19:02:53,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:02:53,212 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:02:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:02:53,217 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:53,218 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:53,218 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:53,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:53,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1957812527, now seen corresponding path program 1 times [2021-10-21 19:02:53,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:53,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104069107] [2021-10-21 19:02:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:53,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:53,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:53,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:53,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:53,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104069107] [2021-10-21 19:02:53,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104069107] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:02:53,416 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:02:53,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:02:53,424 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765572262] [2021-10-21 19:02:53,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:02:53,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:53,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:02:53,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:02:53,452 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-10-21 19:02:53,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:53,470 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2021-10-21 19:02:53,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:02:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 12 [2021-10-21 19:02:53,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:53,480 INFO L225 Difference]: With dead ends: 48 [2021-10-21 19:02:53,480 INFO L226 Difference]: Without dead ends: 24 [2021-10-21 19:02:53,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:02:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-21 19:02:53,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-21 19:02:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 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) [2021-10-21 19:02:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2021-10-21 19:02:53,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 12 [2021-10-21 19:02:53,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:53,515 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2021-10-21 19:02:53,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2021-10-21 19:02:53,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2021-10-21 19:02:53,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:02:53,517 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:53,517 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:53,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:02:53,518 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:53,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:53,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1580862863, now seen corresponding path program 1 times [2021-10-21 19:02:53,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:53,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874399969] [2021-10-21 19:02:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:53,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:53,588 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:53,588 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874399969] [2021-10-21 19:02:53,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874399969] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:02:53,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:02:53,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:02:53,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165405090] [2021-10-21 19:02:53,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:02:53,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:02:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:02:53,592 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-21 19:02:53,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:53,611 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-21 19:02:53,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:02:53,612 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 12 [2021-10-21 19:02:53,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:53,613 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:02:53,613 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 19:02:53,614 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:02:53,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 19:02:53,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-10-21 19:02:53,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 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) [2021-10-21 19:02:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-10-21 19:02:53,619 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 12 [2021-10-21 19:02:53,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:53,620 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-21 19:02:53,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2021-10-21 19:02:53,620 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-10-21 19:02:53,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:02:53,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:53,621 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:53,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:02:53,622 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash -2031015874, now seen corresponding path program 1 times [2021-10-21 19:02:53,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:53,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112098034] [2021-10-21 19:02:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:53,623 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:53,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:53,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:53,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112098034] [2021-10-21 19:02:53,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112098034] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:02:53,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:02:53,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:02:53,713 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469775260] [2021-10-21 19:02:53,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:02:53,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:53,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:02:53,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:02:53,715 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:02:53,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:53,753 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2021-10-21 19:02:53,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:02:53,754 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-21 19:02:53,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:53,756 INFO L225 Difference]: With dead ends: 53 [2021-10-21 19:02:53,757 INFO L226 Difference]: Without dead ends: 31 [2021-10-21 19:02:53,757 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:02:53,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-21 19:02:53,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-10-21 19:02:53,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 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) [2021-10-21 19:02:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2021-10-21 19:02:53,767 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 19 [2021-10-21 19:02:53,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:53,767 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2021-10-21 19:02:53,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:02:53,768 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2021-10-21 19:02:53,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:02:53,769 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:53,769 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:53,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:02:53,770 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:53,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1772850436, now seen corresponding path program 1 times [2021-10-21 19:02:53,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:53,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427560801] [2021-10-21 19:02:53,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:53,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:53,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:53,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:53,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427560801] [2021-10-21 19:02:53,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427560801] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:02:53,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:02:53,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-21 19:02:53,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912481539] [2021-10-21 19:02:53,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:02:53,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:53,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:02:53,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:02:53,978 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-10-21 19:02:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:54,237 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2021-10-21 19:02:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:02:54,238 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 [2021-10-21 19:02:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:54,239 INFO L225 Difference]: With dead ends: 77 [2021-10-21 19:02:54,239 INFO L226 Difference]: Without dead ends: 64 [2021-10-21 19:02:54,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:02:54,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-21 19:02:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2021-10-21 19:02:54,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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) [2021-10-21 19:02:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-10-21 19:02:54,247 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 19 [2021-10-21 19:02:54,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:54,247 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-10-21 19:02:54,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2021-10-21 19:02:54,248 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-10-21 19:02:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-21 19:02:54,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:54,249 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:54,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:02:54,249 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:54,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1771003394, now seen corresponding path program 1 times [2021-10-21 19:02:54,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:54,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119586938] [2021-10-21 19:02:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:54,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:54,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:54,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:54,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119586938] [2021-10-21 19:02:54,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119586938] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:54,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264740889] [2021-10-21 19:02:54,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:54,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:54,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:02:54,324 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:02:54,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:02:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:54,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:02:54,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:02:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:54,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264740889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:54,554 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:02:54,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-21 19:02:54,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36169933] [2021-10-21 19:02:54,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:02:54,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:54,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:02:54,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:02:54,557 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. 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) [2021-10-21 19:02:54,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:54,598 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2021-10-21 19:02:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:02:54,599 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 [2021-10-21 19:02:54,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:54,602 INFO L225 Difference]: With dead ends: 64 [2021-10-21 19:02:54,602 INFO L226 Difference]: Without dead ends: 46 [2021-10-21 19:02:54,603 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:02:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-21 19:02:54,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-10-21 19:02:54,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 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) [2021-10-21 19:02:54,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-10-21 19:02:54,610 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 19 [2021-10-21 19:02:54,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:54,611 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-10-21 19:02:54,611 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) [2021-10-21 19:02:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-10-21 19:02:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-21 19:02:54,612 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:54,612 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:54,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:02:54,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:54,814 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:54,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:54,814 INFO L82 PathProgramCache]: Analyzing trace with hash -282378703, now seen corresponding path program 1 times [2021-10-21 19:02:54,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:54,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109435654] [2021-10-21 19:02:54,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:54,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:54,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:54,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:54,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109435654] [2021-10-21 19:02:54,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109435654] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:54,915 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902708055] [2021-10-21 19:02:54,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:54,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:54,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:02:54,922 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:02:54,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:02:55,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:55,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:02:55,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:02:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:55,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902708055] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:55,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:02:55,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-21 19:02:55,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649793179] [2021-10-21 19:02:55,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:02:55,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:02:55,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:02:55,159 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-10-21 19:02:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:55,201 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2021-10-21 19:02:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:02:55,201 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) Word has length 26 [2021-10-21 19:02:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:55,204 INFO L225 Difference]: With dead ends: 75 [2021-10-21 19:02:55,204 INFO L226 Difference]: Without dead ends: 55 [2021-10-21 19:02:55,205 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:02:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-21 19:02:55,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-10-21 19:02:55,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:02:55,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-10-21 19:02:55,220 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 26 [2021-10-21 19:02:55,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:55,220 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-10-21 19:02:55,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 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) [2021-10-21 19:02:55,222 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-10-21 19:02:55,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-21 19:02:55,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:55,223 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:55,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:02:55,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:55,449 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:55,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:55,449 INFO L82 PathProgramCache]: Analyzing trace with hash 700996956, now seen corresponding path program 2 times [2021-10-21 19:02:55,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:55,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140283825] [2021-10-21 19:02:55,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:55,450 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:55,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:55,529 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:55,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:55,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140283825] [2021-10-21 19:02:55,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140283825] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:55,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072867836] [2021-10-21 19:02:55,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:02:55,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:55,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:02:55,532 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:02:55,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:02:55,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:02:55,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:02:55,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:02:55,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:02:55,783 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:55,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072867836] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:55,784 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:02:55,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-21 19:02:55,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221572860] [2021-10-21 19:02:55,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-21 19:02:55,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:55,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-21 19:02:55,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:02:55,786 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-10-21 19:02:55,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:55,828 INFO L93 Difference]: Finished difference Result 82 states and 109 transitions. [2021-10-21 19:02:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:02:55,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) Word has length 33 [2021-10-21 19:02:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:55,830 INFO L225 Difference]: With dead ends: 82 [2021-10-21 19:02:55,830 INFO L226 Difference]: Without dead ends: 62 [2021-10-21 19:02:55,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.1ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:02:55,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-21 19:02:55,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-10-21 19:02:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 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) [2021-10-21 19:02:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-10-21 19:02:55,836 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 33 [2021-10-21 19:02:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:55,837 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-10-21 19:02:55,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 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) [2021-10-21 19:02:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-10-21 19:02:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:02:55,838 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:55,838 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:55,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:02:56,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:56,061 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:56,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:56,061 INFO L82 PathProgramCache]: Analyzing trace with hash -338892847, now seen corresponding path program 3 times [2021-10-21 19:02:56,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:56,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075852767] [2021-10-21 19:02:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:56,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:02:56,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:02:56,155 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:02:56,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:02:56,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075852767] [2021-10-21 19:02:56,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075852767] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:56,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348690097] [2021-10-21 19:02:56,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:02:56,156 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:56,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:02:56,165 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:02:56,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:02:58,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-21 19:02:58,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:02:58,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:02:58,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:02:58,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-21 19:02:58,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:02:58,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 51 [2021-10-21 19:02:58,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,630 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-21 19:02:58,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-21 19:02:58,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-21 19:02:58,707 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-21 19:02:58,709 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 3 case distinctions, treesize of input 39 treesize of output 26 [2021-10-21 19:02:58,926 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-21 19:02:58,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348690097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:02:58,927 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:02:58,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2021-10-21 19:02:58,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014230614] [2021-10-21 19:02:58,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-21 19:02:58,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:02:58,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-21 19:02:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:02:58,935 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 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) [2021-10-21 19:02:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:02:59,668 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-10-21 19:02:59,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:02:59,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 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 40 [2021-10-21 19:02:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:02:59,675 INFO L225 Difference]: With dead ends: 95 [2021-10-21 19:02:59,675 INFO L226 Difference]: Without dead ends: 75 [2021-10-21 19:02:59,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 479.5ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:02:59,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-21 19:02:59,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-10-21 19:02:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 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) [2021-10-21 19:02:59,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-10-21 19:02:59,684 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 40 [2021-10-21 19:02:59,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:02:59,684 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-10-21 19:02:59,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 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) [2021-10-21 19:02:59,685 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-10-21 19:02:59,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:02:59,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:02:59,686 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:02:59,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-10-21 19:02:59,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:02:59,901 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:02:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:02:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash 2038353598, now seen corresponding path program 1 times [2021-10-21 19:02:59,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:02:59,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749502298] [2021-10-21 19:02:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:02:59,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:03:00,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:03:00,240 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-21 19:03:00,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:03:00,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749502298] [2021-10-21 19:03:00,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749502298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:03:00,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413293184] [2021-10-21 19:03:00,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:03:00,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:03:00,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:03:00,242 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:03:00,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:03:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:03:00,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-21 19:03:00,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:03:00,452 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 [2021-10-21 19:03:00,489 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-21 19:03:00,491 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 [2021-10-21 19:03:00,525 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-21 19:03:00,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-10-21 19:03:00,615 INFO L354 Elim1Store]: treesize reduction 156, result has 14.3 percent of original size [2021-10-21 19:03:00,616 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 4 case distinctions, treesize of input 60 treesize of output 51 [2021-10-21 19:03:00,637 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-21 19:03:00,637 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 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-21 19:03:00,681 INFO L354 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2021-10-21 19:03:00,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-21 19:03:00,897 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-21 19:03:00,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413293184] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:03:00,897 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:03:00,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-10-21 19:03:00,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551411138] [2021-10-21 19:03:00,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:03:00,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:03:00,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:03:00,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:03:00,907 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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) [2021-10-21 19:03:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:03:01,668 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2021-10-21 19:03:01,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:03:01,670 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-21 19:03:01,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:03:01,671 INFO L225 Difference]: With dead ends: 86 [2021-10-21 19:03:01,671 INFO L226 Difference]: Without dead ends: 73 [2021-10-21 19:03:01,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 627.6ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:03:01,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-21 19:03:01,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2021-10-21 19:03:01,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:03:01,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2021-10-21 19:03:01,679 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 47 [2021-10-21 19:03:01,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:03:01,679 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2021-10-21 19:03:01,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 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) [2021-10-21 19:03:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2021-10-21 19:03:01,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-21 19:03:01,681 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:03:01,682 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:03:01,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:03:01,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:03:01,897 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:03:01,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:03:01,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2038355520, now seen corresponding path program 1 times [2021-10-21 19:03:01,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:03:01,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737261712] [2021-10-21 19:03:01,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:03:01,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:03:01,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:03:01,971 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:03:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:03:02,062 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:03:02,062 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:03:02,063 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:03:02,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:03:02,071 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:03:02,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:03:02 BoogieIcfgContainer [2021-10-21 19:03:02,133 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:03:02,134 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:03:02,134 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:03:02,134 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:03:02,138 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:02:53" (3/4) ... [2021-10-21 19:03:02,139 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:03:02,231 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:03:02,231 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:03:02,232 INFO L168 Benchmark]: Toolchain (without parser) took 10268.26 ms. Allocated memory was 81.8 MB in the beginning and 134.2 MB in the end (delta: 52.4 MB). Free memory was 46.7 MB in the beginning and 36.1 MB in the end (delta: 10.6 MB). Peak memory consumption was 64.7 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,233 INFO L168 Benchmark]: CDTParser took 4.84 ms. Allocated memory is still 81.8 MB. Free memory was 60.7 MB in the beginning and 64.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,233 INFO L168 Benchmark]: CACSL2BoogieTranslator took 520.45 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 46.5 MB in the beginning and 77.0 MB in the end (delta: -30.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,233 INFO L168 Benchmark]: Boogie Procedure Inliner took 79.15 ms. Allocated memory is still 109.1 MB. Free memory was 77.0 MB in the beginning and 75.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,234 INFO L168 Benchmark]: Boogie Preprocessor took 60.69 ms. Allocated memory is still 109.1 MB. Free memory was 75.0 MB in the beginning and 73.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,234 INFO L168 Benchmark]: RCFGBuilder took 486.16 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 60.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,235 INFO L168 Benchmark]: TraceAbstraction took 9017.66 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 59.7 MB in the beginning and 40.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,235 INFO L168 Benchmark]: Witness Printer took 97.39 ms. Allocated memory is still 134.2 MB. Free memory was 40.3 MB in the beginning and 36.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-21 19:03:02,238 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 4.84 ms. Allocated memory is still 81.8 MB. Free memory was 60.7 MB in the beginning and 64.0 MB in the end (delta: -3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 520.45 ms. Allocated memory was 81.8 MB in the beginning and 109.1 MB in the end (delta: 27.3 MB). Free memory was 46.5 MB in the beginning and 77.0 MB in the end (delta: -30.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 79.15 ms. Allocated memory is still 109.1 MB. Free memory was 77.0 MB in the beginning and 75.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.69 ms. Allocated memory is still 109.1 MB. Free memory was 75.0 MB in the beginning and 73.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 486.16 ms. Allocated memory is still 109.1 MB. Free memory was 73.3 MB in the beginning and 60.2 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9017.66 ms. Allocated memory was 109.1 MB in the beginning and 134.2 MB in the end (delta: 25.2 MB). Free memory was 59.7 MB in the beginning and 40.3 MB in the end (delta: 19.4 MB). Peak memory consumption was 46.0 MB. Max. memory is 16.1 GB. * Witness Printer took 97.39 ms. Allocated memory is still 134.2 MB. Free memory was 40.3 MB in the beginning and 36.1 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8879.9ms, OverallIterations: 10, TraceHistogramMax: 5, EmptinessCheckTime: 18.9ms, AutomataDifference: 2036.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 239 SDtfs, 981 SDslu, 503 SDs, 0 SdLazy, 628 SolverSat, 203 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 797.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1236.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=9, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 82.3ms AutomataMinimizationTime, 9 MinimizatonAttempts, 93 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 111.5ms SsaConstructionTime, 2633.7ms SatisfiabilityAnalysisTime, 2261.1ms InterpolantComputationTime, 439 NumberOfCodeBlocks, 432 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 378 ConstructedInterpolants, 0 QuantifiedInterpolants, 1306 SizeOfPredicates, 33 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 159/312 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! [2021-10-21 19:03:02,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_eae05953-69e1-49d3-81fa-89e054cbad51/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...