./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_safe-12.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_safe-12.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:35:28,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:35:28,512 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:35:28,543 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:35:28,549 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:35:28,551 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:35:28,557 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:35:28,559 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:35:28,560 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:35:28,566 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:35:28,568 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:35:28,569 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:35:28,571 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:35:28,572 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:35:28,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:35:28,578 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:35:28,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:35:28,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:35:28,592 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:35:28,595 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:35:28,597 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:35:28,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:35:28,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:35:28,607 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:35:28,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:35:28,621 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:35:28,621 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:35:28,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:35:28,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:35:28,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:35:28,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:35:28,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:35:28,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:35:28,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:35:28,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:35:28,634 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:35:28,636 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:35:28,636 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:35:28,637 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:35:28,638 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:35:28,641 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:35:28,642 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-20 10:35:28,689 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:35:28,695 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:35:28,696 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:35:28,696 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:35:28,697 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:35:28,698 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:35:28,699 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:35:28,699 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:35:28,699 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:35:28,700 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:35:28,701 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:35:28,702 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-20 10:35:28,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:35:28,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:35:28,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:35:28,703 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-20 10:35:28,703 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-20 10:35:28,703 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-20 10:35:28,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:35:28,704 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-20 10:35:28,704 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:35:28,704 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:35:28,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:35:28,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:35:28,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:35:28,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:35:28,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:35:28,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:35:28,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:35:28,707 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:35:28,707 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_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 [2022-11-20 10:35:28,987 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:35:29,022 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:35:29,028 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:35:29,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:35:29,030 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:35:29,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/pthread/fib_safe-12.i [2022-11-20 10:35:32,290 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:35:32,655 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:35:32,656 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/sv-benchmarks/c/pthread/fib_safe-12.i [2022-11-20 10:35:32,679 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/data/eab773d49/ee6ae586680b48f4a32a924467dbe03a/FLAG9e0463662 [2022-11-20 10:35:32,691 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/data/eab773d49/ee6ae586680b48f4a32a924467dbe03a [2022-11-20 10:35:32,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:35:32,696 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:35:32,697 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:35:32,697 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:35:32,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:35:32,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:35:32" (1/1) ... [2022-11-20 10:35:32,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69b5929b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:32, skipping insertion in model container [2022-11-20 10:35:32,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:35:32" (1/1) ... [2022-11-20 10:35:32,711 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:35:32,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:35:33,097 WARN L237 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_da369bd9-9e7c-4751-9a9d-178f6da9464b/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-11-20 10:35:33,129 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:35:33,146 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:35:33,187 WARN L237 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_da369bd9-9e7c-4751-9a9d-178f6da9464b/sv-benchmarks/c/pthread/fib_safe-12.i[30241,30254] [2022-11-20 10:35:33,208 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:35:33,267 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:35:33,268 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33 WrapperNode [2022-11-20 10:35:33,270 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:35:33,273 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:35:33,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:35:33,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:35:33,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,356 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 76 [2022-11-20 10:35:33,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:35:33,358 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:35:33,358 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:35:33,358 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:35:33,370 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,389 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:35:33,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:35:33,422 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:35:33,422 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:35:33,423 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (1/1) ... [2022-11-20 10:35:33,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:35:33,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:33,461 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:35:33,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:35:33,512 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-20 10:35:33,512 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-20 10:35:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-20 10:35:33,513 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-20 10:35:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:35:33,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-20 10:35:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:35:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 10:35:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:35:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:35:33,514 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-20 10:35:33,515 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:35:33,515 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:35:33,517 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 10:35:33,753 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:35:33,765 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:35:34,015 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:35:34,024 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:35:34,025 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-20 10:35:34,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:35:34 BoogieIcfgContainer [2022-11-20 10:35:34,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:35:34,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:35:34,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:35:34,036 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:35:34,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:35:32" (1/3) ... [2022-11-20 10:35:34,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec402b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:35:34, skipping insertion in model container [2022-11-20 10:35:34,038 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:35:33" (2/3) ... [2022-11-20 10:35:34,038 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec402b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:35:34, skipping insertion in model container [2022-11-20 10:35:34,039 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:35:34" (3/3) ... [2022-11-20 10:35:34,041 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2022-11-20 10:35:34,065 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:35:34,066 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-20 10:35:34,066 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 10:35:34,133 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-20 10:35:34,173 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 10:35:34,188 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-20 10:35:34,192 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 109 places, 109 transitions, 228 flow [2022-11-20 10:35:34,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 109 transitions, 228 flow [2022-11-20 10:35:34,265 INFO L130 PetriNetUnfolder]: 7/107 cut-off events. [2022-11-20 10:35:34,266 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-20 10:35:34,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114 conditions, 107 events. 7/107 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 89 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 75. Up to 2 conditions per place. [2022-11-20 10:35:34,276 INFO L119 LiptonReduction]: Number of co-enabled transitions 2310 [2022-11-20 10:35:39,618 INFO L134 LiptonReduction]: Checked pairs total: 1738 [2022-11-20 10:35:39,619 INFO L136 LiptonReduction]: Total number of compositions: 114 [2022-11-20 10:35:39,627 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 25 places, 21 transitions, 52 flow [2022-11-20 10:35:39,646 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 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) [2022-11-20 10:35:39,666 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:35:39,673 INFO L357 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@63d49b9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:35:39,673 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-20 10:35:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 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) [2022-11-20 10:35:39,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-11-20 10:35:39,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:39,682 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-11-20 10:35:39,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:39,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash 419, now seen corresponding path program 1 times [2022-11-20 10:35:39,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:39,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529850407] [2022-11-20 10:35:39,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:39,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:39,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:39,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529850407] [2022-11-20 10:35:39,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529850407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:39,851 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:39,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-20 10:35:39,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184505822] [2022-11-20 10:35:39,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:39,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:35:39,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:35:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:35:39,894 INFO L87 Difference]: Start difference. First operand has 52 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 51 states have internal predecessors, (136), 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, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-20 10:35:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:39,951 INFO L93 Difference]: Finished difference Result 50 states and 134 transitions. [2022-11-20 10:35:39,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:35:39,954 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-11-20 10:35:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:39,965 INFO L225 Difference]: With dead ends: 50 [2022-11-20 10:35:39,965 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 10:35:39,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-20 10:35:39,970 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:39,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:35:39,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 10:35:40,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-20 10:35:40,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 2.9130434782608696) internal successors, (134), 49 states have internal predecessors, (134), 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) [2022-11-20 10:35:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 134 transitions. [2022-11-20 10:35:40,015 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 134 transitions. Word has length 1 [2022-11-20 10:35:40,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:40,016 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 134 transitions. [2022-11-20 10:35:40,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-11-20 10:35:40,016 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 134 transitions. [2022-11-20 10:35:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:35:40,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:40,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:35:40,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 10:35:40,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:40,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:40,019 INFO L85 PathProgramCache]: Analyzing trace with hash 410526, now seen corresponding path program 1 times [2022-11-20 10:35:40,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:40,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342927078] [2022-11-20 10:35:40,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:40,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:40,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:40,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:40,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342927078] [2022-11-20 10:35:40,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342927078] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:40,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:40,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:35:40,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409701365] [2022-11-20 10:35:40,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:40,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:35:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:35:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:35:40,385 INFO L87 Difference]: Start difference. First operand 50 states and 134 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-20 10:35:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:40,445 INFO L93 Difference]: Finished difference Result 47 states and 128 transitions. [2022-11-20 10:35:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:35:40,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-20 10:35:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:40,447 INFO L225 Difference]: With dead ends: 47 [2022-11-20 10:35:40,448 INFO L226 Difference]: Without dead ends: 47 [2022-11-20 10:35:40,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:35:40,450 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:40,450 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 0 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:35:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-20 10:35:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-20 10:35:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 2.909090909090909) internal successors, (128), 46 states have internal predecessors, (128), 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) [2022-11-20 10:35:40,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 128 transitions. [2022-11-20 10:35:40,459 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 128 transitions. Word has length 3 [2022-11-20 10:35:40,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:40,460 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 128 transitions. [2022-11-20 10:35:40,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-20 10:35:40,461 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 128 transitions. [2022-11-20 10:35:40,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2022-11-20 10:35:40,461 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:40,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2022-11-20 10:35:40,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 10:35:40,462 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:40,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash 410527, now seen corresponding path program 1 times [2022-11-20 10:35:40,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:40,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473446457] [2022-11-20 10:35:40,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:40,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:40,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:40,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:40,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473446457] [2022-11-20 10:35:40,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473446457] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:40,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:40,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:35:40,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086159164] [2022-11-20 10:35:40,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:40,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:35:40,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:40,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:35:40,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:35:40,549 INFO L87 Difference]: Start difference. First operand 47 states and 128 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-20 10:35:40,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:40,586 INFO L93 Difference]: Finished difference Result 44 states and 122 transitions. [2022-11-20 10:35:40,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:35:40,587 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2022-11-20 10:35:40,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:40,588 INFO L225 Difference]: With dead ends: 44 [2022-11-20 10:35:40,589 INFO L226 Difference]: Without dead ends: 44 [2022-11-20 10:35:40,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:35:40,590 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:40,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:35:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-20 10:35:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-20 10:35:40,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 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) [2022-11-20 10:35:40,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 122 transitions. [2022-11-20 10:35:40,608 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 122 transitions. Word has length 3 [2022-11-20 10:35:40,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:40,609 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 122 transitions. [2022-11-20 10:35:40,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2022-11-20 10:35:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 122 transitions. [2022-11-20 10:35:40,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 10:35:40,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:40,611 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 10:35:40,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:35:40,612 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:40,613 INFO L85 PathProgramCache]: Analyzing trace with hash -654675701, now seen corresponding path program 1 times [2022-11-20 10:35:40,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:40,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584519144] [2022-11-20 10:35:40,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:40,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:40,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:40,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584519144] [2022-11-20 10:35:40,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584519144] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:35:40,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:35:40,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-20 10:35:40,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800836815] [2022-11-20 10:35:40,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:35:40,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:35:40,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:40,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:35:40,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:35:40,698 INFO L87 Difference]: Start difference. First operand 44 states and 122 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-20 10:35:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:40,741 INFO L93 Difference]: Finished difference Result 53 states and 149 transitions. [2022-11-20 10:35:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:35:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2022-11-20 10:35:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:40,743 INFO L225 Difference]: With dead ends: 53 [2022-11-20 10:35:40,743 INFO L226 Difference]: Without dead ends: 53 [2022-11-20 10:35:40,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:35:40,745 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:40,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 0 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:35:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-20 10:35:40,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-20 10:35:40,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 51 states have (on average 2.9215686274509802) internal successors, (149), 52 states have internal predecessors, (149), 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) [2022-11-20 10:35:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 149 transitions. [2022-11-20 10:35:40,754 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 149 transitions. Word has length 6 [2022-11-20 10:35:40,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:40,755 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 149 transitions. [2022-11-20 10:35:40,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 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) [2022-11-20 10:35:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 149 transitions. [2022-11-20 10:35:40,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-20 10:35:40,756 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:40,756 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:40,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:35:40,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:40,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:40,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1179889916, now seen corresponding path program 1 times [2022-11-20 10:35:40,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:40,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63619757] [2022-11-20 10:35:40,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:40,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,822 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:40,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:40,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63619757] [2022-11-20 10:35:40,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63619757] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:40,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506293792] [2022-11-20 10:35:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:40,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:40,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:40,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:40,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:35:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:40,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 10:35:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506293792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:41,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:35:41,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 10:35:41,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556529636] [2022-11-20 10:35:41,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:41,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:35:41,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:35:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:35:41,066 INFO L87 Difference]: Start difference. First operand 53 states and 149 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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) [2022-11-20 10:35:41,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:41,177 INFO L93 Difference]: Finished difference Result 80 states and 230 transitions. [2022-11-20 10:35:41,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 10:35:41,177 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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 7 [2022-11-20 10:35:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:41,178 INFO L225 Difference]: With dead ends: 80 [2022-11-20 10:35:41,179 INFO L226 Difference]: Without dead ends: 80 [2022-11-20 10:35:41,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:35:41,180 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:41,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 0 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:35:41,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-11-20 10:35:41,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-11-20 10:35:41,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 78 states have (on average 2.948717948717949) internal successors, (230), 79 states have internal predecessors, (230), 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) [2022-11-20 10:35:41,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 230 transitions. [2022-11-20 10:35:41,189 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 230 transitions. Word has length 7 [2022-11-20 10:35:41,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:41,189 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 230 transitions. [2022-11-20 10:35:41,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 7 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) [2022-11-20 10:35:41,190 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 230 transitions. [2022-11-20 10:35:41,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-20 10:35:41,191 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:41,191 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:41,229 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:41,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:41,424 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:41,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:41,425 INFO L85 PathProgramCache]: Analyzing trace with hash 88302923, now seen corresponding path program 2 times [2022-11-20 10:35:41,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:41,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343221614] [2022-11-20 10:35:41,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:41,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:41,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:41,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343221614] [2022-11-20 10:35:41,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343221614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:41,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289525976] [2022-11-20 10:35:41,544 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:35:41,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:41,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:41,546 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:41,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:35:41,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:35:41,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:41,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-20 10:35:41,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:41,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:41,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289525976] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:41,783 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:35:41,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-20 10:35:41,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757047083] [2022-11-20 10:35:41,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:41,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-20 10:35:41,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:41,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-20 10:35:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:35:41,786 INFO L87 Difference]: Start difference. First operand 80 states and 230 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-11-20 10:35:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:41,953 INFO L93 Difference]: Finished difference Result 134 states and 392 transitions. [2022-11-20 10:35:41,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-20 10:35:41,954 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-20 10:35:41,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:41,956 INFO L225 Difference]: With dead ends: 134 [2022-11-20 10:35:41,956 INFO L226 Difference]: Without dead ends: 134 [2022-11-20 10:35:41,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-20 10:35:41,957 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:41,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 0 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:35:41,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-20 10:35:41,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-11-20 10:35:41,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 2.9696969696969697) internal successors, (392), 133 states have internal predecessors, (392), 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) [2022-11-20 10:35:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 392 transitions. [2022-11-20 10:35:41,982 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 392 transitions. Word has length 10 [2022-11-20 10:35:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:41,982 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 392 transitions. [2022-11-20 10:35:41,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 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) [2022-11-20 10:35:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 392 transitions. [2022-11-20 10:35:41,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-20 10:35:41,984 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:41,984 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:41,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:42,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:42,185 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:42,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:42,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1112545195, now seen corresponding path program 3 times [2022-11-20 10:35:42,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:42,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128762341] [2022-11-20 10:35:42,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:42,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:42,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:42,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:42,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128762341] [2022-11-20 10:35:42,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128762341] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:42,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804217787] [2022-11-20 10:35:42,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-20 10:35:42,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:42,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:42,402 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:42,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:35:42,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-20 10:35:42,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:42,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-20 10:35:42,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:42,577 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:42,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:42,862 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:42,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804217787] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:42,862 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:35:42,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2022-11-20 10:35:42,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449957987] [2022-11-20 10:35:42,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:42,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-20 10:35:42,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:42,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-20 10:35:42,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:35:42,865 INFO L87 Difference]: Start difference. First operand 134 states and 392 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:43,248 INFO L93 Difference]: Finished difference Result 242 states and 716 transitions. [2022-11-20 10:35:43,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-20 10:35:43,265 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-20 10:35:43,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:43,268 INFO L225 Difference]: With dead ends: 242 [2022-11-20 10:35:43,269 INFO L226 Difference]: Without dead ends: 242 [2022-11-20 10:35:43,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2022-11-20 10:35:43,270 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 345 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:43,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 0 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:35:43,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-11-20 10:35:43,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-11-20 10:35:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 240 states have (on average 2.9833333333333334) internal successors, (716), 241 states have internal predecessors, (716), 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) [2022-11-20 10:35:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 716 transitions. [2022-11-20 10:35:43,287 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 716 transitions. Word has length 16 [2022-11-20 10:35:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:43,287 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 716 transitions. [2022-11-20 10:35:43,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 716 transitions. [2022-11-20 10:35:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-20 10:35:43,290 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:43,290 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:43,301 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-20 10:35:43,497 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:43,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:43,497 INFO L85 PathProgramCache]: Analyzing trace with hash 144286827, now seen corresponding path program 4 times [2022-11-20 10:35:43,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:43,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609740886] [2022-11-20 10:35:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:44,252 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:44,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:44,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609740886] [2022-11-20 10:35:44,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609740886] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:44,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724383181] [2022-11-20 10:35:44,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-20 10:35:44,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:44,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:44,257 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:44,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:35:44,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-20 10:35:44,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:44,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-20 10:35:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:44,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:44,971 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:44,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724383181] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:44,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:35:44,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 28 [2022-11-20 10:35:44,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702785688] [2022-11-20 10:35:44,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:44,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-20 10:35:44,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:44,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-20 10:35:44,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:35:44,973 INFO L87 Difference]: Start difference. First operand 242 states and 716 transitions. Second operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:35:45,353 INFO L93 Difference]: Finished difference Result 278 states and 824 transitions. [2022-11-20 10:35:45,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:35:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-11-20 10:35:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:35:45,357 INFO L225 Difference]: With dead ends: 278 [2022-11-20 10:35:45,357 INFO L226 Difference]: Without dead ends: 278 [2022-11-20 10:35:45,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 20 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2022-11-20 10:35:45,360 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 411 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:35:45,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 0 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-20 10:35:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-11-20 10:35:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-11-20 10:35:45,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 276 states have (on average 2.9855072463768115) internal successors, (824), 277 states have internal predecessors, (824), 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) [2022-11-20 10:35:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 824 transitions. [2022-11-20 10:35:45,404 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 824 transitions. Word has length 28 [2022-11-20 10:35:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:35:45,404 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 824 transitions. [2022-11-20 10:35:45,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 10:35:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 824 transitions. [2022-11-20 10:35:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:35:45,407 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:35:45,407 INFO L195 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-11-20 10:35:45,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:35:45,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:45,613 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:35:45,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:35:45,614 INFO L85 PathProgramCache]: Analyzing trace with hash 559540395, now seen corresponding path program 5 times [2022-11-20 10:35:45,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:35:45,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137489935] [2022-11-20 10:35:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:35:45,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:35:45,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:35:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:48,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:35:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137489935] [2022-11-20 10:35:48,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137489935] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:35:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957160322] [2022-11-20 10:35:48,212 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-20 10:35:48,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:35:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:35:48,214 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:35:48,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:35:48,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-20 10:35:48,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:35:48,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 89 conjunts are in the unsatisfiable core [2022-11-20 10:35:48,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:35:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:50,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:35:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:35:52,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957160322] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:35:52,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:35:52,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 81 [2022-11-20 10:35:52,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867697855] [2022-11-20 10:35:52,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:35:52,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-11-20 10:35:52,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:35:52,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-11-20 10:35:52,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1222, Invalid=5584, Unknown=0, NotChecked=0, Total=6806 [2022-11-20 10:35:52,732 INFO L87 Difference]: Start difference. First operand 278 states and 824 transitions. Second operand has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 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) [2022-11-20 10:38:37,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:37,160 INFO L93 Difference]: Finished difference Result 60017 states and 178237 transitions. [2022-11-20 10:38:37,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 697 states. [2022-11-20 10:38:37,161 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 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 32 [2022-11-20 10:38:37,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:37,708 INFO L225 Difference]: With dead ends: 60017 [2022-11-20 10:38:37,709 INFO L226 Difference]: Without dead ends: 60017 [2022-11-20 10:38:37,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 747 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276101 ImplicationChecksByTransitivity, 149.3s TimeCoverageRelationStatistics Valid=99787, Invalid=460465, Unknown=0, NotChecked=0, Total=560252 [2022-11-20 10:38:37,776 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 13222 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 9696 mSolverCounterSat, 4701 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13222 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 14397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4701 IncrementalHoareTripleChecker+Valid, 9696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:37,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13222 Valid, 0 Invalid, 14397 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4701 Valid, 9696 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-11-20 10:38:37,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60017 states. [2022-11-20 10:38:40,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60017 to 48684. [2022-11-20 10:38:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48684 states, 48682 states have (on average 3.233392218889939) internal successors, (157408), 48683 states have internal predecessors, (157408), 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) [2022-11-20 10:38:40,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48684 states to 48684 states and 157408 transitions. [2022-11-20 10:38:40,605 INFO L78 Accepts]: Start accepts. Automaton has 48684 states and 157408 transitions. Word has length 32 [2022-11-20 10:38:40,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:40,607 INFO L495 AbstractCegarLoop]: Abstraction has 48684 states and 157408 transitions. [2022-11-20 10:38:40,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 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) [2022-11-20 10:38:40,609 INFO L276 IsEmpty]: Start isEmpty. Operand 48684 states and 157408 transitions. [2022-11-20 10:38:40,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-20 10:38:40,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:40,726 INFO L195 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:40,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:38:40,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:40,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:38:40,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:40,942 INFO L85 PathProgramCache]: Analyzing trace with hash 559540397, now seen corresponding path program 1 times [2022-11-20 10:38:40,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:40,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701340112] [2022-11-20 10:38:40,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:40,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:41,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:41,346 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-11-20 10:38:41,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:41,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701340112] [2022-11-20 10:38:41,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701340112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:38:41,348 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:38:41,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 10:38:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746165945] [2022-11-20 10:38:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:38:41,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 10:38:41,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 10:38:41,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:41,350 INFO L87 Difference]: Start difference. First operand 48684 states and 157408 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-20 10:38:42,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:38:42,469 INFO L93 Difference]: Finished difference Result 48675 states and 154453 transitions. [2022-11-20 10:38:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 10:38:42,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 32 [2022-11-20 10:38:42,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:38:42,810 INFO L225 Difference]: With dead ends: 48675 [2022-11-20 10:38:42,810 INFO L226 Difference]: Without dead ends: 48647 [2022-11-20 10:38:42,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 10:38:42,812 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 7 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:38:42,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 0 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:38:42,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48647 states. [2022-11-20 10:38:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48647 to 48270. [2022-11-20 10:38:44,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48270 states, 48269 states have (on average 3.1902877623319315) internal successors, (153992), 48269 states have internal predecessors, (153992), 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) [2022-11-20 10:38:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48270 states to 48270 states and 153992 transitions. [2022-11-20 10:38:44,899 INFO L78 Accepts]: Start accepts. Automaton has 48270 states and 153992 transitions. Word has length 32 [2022-11-20 10:38:44,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:38:44,899 INFO L495 AbstractCegarLoop]: Abstraction has 48270 states and 153992 transitions. [2022-11-20 10:38:44,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-20 10:38:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 48270 states and 153992 transitions. [2022-11-20 10:38:45,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 10:38:45,227 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:38:45,227 INFO L195 NwaCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:38:45,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 10:38:45,227 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-20 10:38:45,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:38:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -677526595, now seen corresponding path program 1 times [2022-11-20 10:38:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:38:45,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563848422] [2022-11-20 10:38:45,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:45,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:38:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:48,121 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:48,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:38:48,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563848422] [2022-11-20 10:38:48,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563848422] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:38:48,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330712387] [2022-11-20 10:38:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:38:48,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:38:48,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:38:48,123 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:38:48,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_da369bd9-9e7c-4751-9a9d-178f6da9464b/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-20 10:38:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:38:48,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 88 conjunts are in the unsatisfiable core [2022-11-20 10:38:48,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:38:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 300 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:50,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:38:53,262 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 10:38:53,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330712387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:38:53,263 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:38:53,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 87 [2022-11-20 10:38:53,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540417634] [2022-11-20 10:38:53,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:38:53,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-11-20 10:38:53,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:38:53,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-11-20 10:38:53,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1306, Invalid=6526, Unknown=0, NotChecked=0, Total=7832 [2022-11-20 10:38:53,266 INFO L87 Difference]: Start difference. First operand 48270 states and 153992 transitions. Second operand has 89 states, 88 states have (on average 1.1931818181818181) internal successors, (105), 88 states have internal predecessors, (105), 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)