./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8 --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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --- 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-e04fb08 [2022-11-16 12:18:30,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:18:30,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:18:30,249 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:18:30,249 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:18:30,254 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:18:30,259 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:18:30,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:18:30,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:18:30,276 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:18:30,278 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:18:30,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:18:30,281 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:18:30,284 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:18:30,287 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:18:30,289 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:18:30,291 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:18:30,292 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:18:30,294 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:18:30,302 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:18:30,303 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:18:30,305 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:18:30,308 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:18:30,309 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:18:30,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:18:30,319 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:18:30,319 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:18:30,321 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:18:30,322 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:18:30,323 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:18:30,324 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:18:30,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:18:30,327 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:18:30,329 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:18:30,330 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:18:30,330 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:18:30,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:18:30,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:18:30,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:18:30,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:18:30,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:18:30,334 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-16 12:18:30,402 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:18:30,402 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:18:30,403 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:18:30,403 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:18:30,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:18:30,405 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:18:30,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:18:30,407 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:18:30,407 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:18:30,407 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:18:30,408 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:18:30,409 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-16 12:18:30,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:18:30,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:18:30,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:18:30,410 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-16 12:18:30,410 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-16 12:18:30,410 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-16 12:18:30,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:18:30,411 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-16 12:18:30,411 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:18:30,412 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:18:30,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:18:30,413 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:18:30,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:18:30,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:18:30,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:18:30,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:18:30,414 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:18:30,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:18:30,415 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_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f [2022-11-16 12:18:30,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:18:30,779 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:18:30,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:18:30,783 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:18:30,785 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:18:30,787 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-11-16 12:18:30,858 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/data/9cb54826e/bf13c7e927074628aa7a8feeeb5ce275/FLAG3e4752d01 [2022-11-16 12:18:31,450 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:18:31,454 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-11-16 12:18:31,472 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/data/9cb54826e/bf13c7e927074628aa7a8feeeb5ce275/FLAG3e4752d01 [2022-11-16 12:18:31,710 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/data/9cb54826e/bf13c7e927074628aa7a8feeeb5ce275 [2022-11-16 12:18:31,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:18:31,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:18:31,719 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:18:31,720 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:18:31,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:18:31,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:18:31" (1/1) ... [2022-11-16 12:18:31,726 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10220345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:31, skipping insertion in model container [2022-11-16 12:18:31,727 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:18:31" (1/1) ... [2022-11-16 12:18:31,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:18:31,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:18:32,233 WARN L229 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_9a0ba09b-8ae0-4385-9e83-dee9c0412822/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2022-11-16 12:18:32,273 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:18:32,297 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:18:32,340 WARN L229 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_9a0ba09b-8ae0-4385-9e83-dee9c0412822/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2022-11-16 12:18:32,349 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:18:32,393 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:18:32,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32 WrapperNode [2022-11-16 12:18:32,395 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:18:32,397 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:18:32,398 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:18:32,398 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:18:32,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,472 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2022-11-16 12:18:32,473 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:18:32,474 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:18:32,474 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:18:32,474 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:18:32,484 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,484 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,487 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,488 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,496 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,503 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:18:32,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:18:32,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:18:32,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:18:32,509 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (1/1) ... [2022-11-16 12:18:32,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:18:32,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:32,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:18:32,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:18:32,599 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:18:32,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:18:32,599 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-16 12:18:32,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:18:32,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:18:32,600 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-16 12:18:32,600 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-16 12:18:32,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:18:32,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:18:32,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:18:32,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:18:32,602 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:18:32,739 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:18:32,741 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:18:33,059 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:18:33,067 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:18:33,067 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-16 12:18:33,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:18:33 BoogieIcfgContainer [2022-11-16 12:18:33,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:18:33,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:18:33,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:18:33,090 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:18:33,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:18:31" (1/3) ... [2022-11-16 12:18:33,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542b51c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:18:33, skipping insertion in model container [2022-11-16 12:18:33,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:18:32" (2/3) ... [2022-11-16 12:18:33,092 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@542b51c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:18:33, skipping insertion in model container [2022-11-16 12:18:33,092 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:18:33" (3/3) ... [2022-11-16 12:18:33,094 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2022-11-16 12:18:33,121 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:18:33,121 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-16 12:18:33,122 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:18:33,207 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-16 12:18:33,244 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:18:33,260 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 156 transitions, 320 flow [2022-11-16 12:18:33,263 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 156 transitions, 320 flow [2022-11-16 12:18:33,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 156 transitions, 320 flow [2022-11-16 12:18:33,384 INFO L130 PetriNetUnfolder]: 26/239 cut-off events. [2022-11-16 12:18:33,384 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-16 12:18:33,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 239 events. 26/239 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 672 event pairs, 0 based on Foata normal form. 0/199 useless extension candidates. Maximal degree in co-relation 122. Up to 6 conditions per place. [2022-11-16 12:18:33,395 INFO L119 LiptonReduction]: Number of co-enabled transitions 3916 [2022-11-16 12:18:38,587 INFO L134 LiptonReduction]: Checked pairs total: 5420 [2022-11-16 12:18:38,587 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-11-16 12:18:38,597 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 41 transitions, 90 flow [2022-11-16 12:18:38,626 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 167 states, 146 states have (on average 2.835616438356164) internal successors, (414), 166 states have internal predecessors, (414), 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) [2022-11-16 12:18:38,647 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:18:38,655 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;@f25b8c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:18:38,655 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-11-16 12:18:38,658 INFO L276 IsEmpty]: Start isEmpty. Operand has 167 states, 146 states have (on average 2.835616438356164) internal successors, (414), 166 states have internal predecessors, (414), 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) [2022-11-16 12:18:38,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:18:38,664 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:38,665 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:18:38,666 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)] === [2022-11-16 12:18:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 18634, now seen corresponding path program 1 times [2022-11-16 12:18:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:38,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868782839] [2022-11-16 12:18:38,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:38,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:38,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:38,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:38,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868782839] [2022-11-16 12:18:39,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868782839] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:39,000 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:39,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:39,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83358833] [2022-11-16 12:18:39,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:39,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:39,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:39,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:39,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:39,050 INFO L87 Difference]: Start difference. First operand has 167 states, 146 states have (on average 2.835616438356164) internal successors, (414), 166 states have internal predecessors, (414), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:39,159 INFO L93 Difference]: Finished difference Result 151 states and 275 transitions. [2022-11-16 12:18:39,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:39,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:18:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:39,181 INFO L225 Difference]: With dead ends: 151 [2022-11-16 12:18:39,182 INFO L226 Difference]: Without dead ends: 147 [2022-11-16 12:18:39,183 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 [2022-11-16 12:18:39,189 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:39,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-11-16 12:18:39,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-11-16 12:18:39,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 134 states have (on average 2.0) internal successors, (268), 146 states have internal predecessors, (268), 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) [2022-11-16 12:18:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 268 transitions. [2022-11-16 12:18:39,271 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 268 transitions. Word has length 2 [2022-11-16 12:18:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:39,272 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 268 transitions. [2022-11-16 12:18:39,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 268 transitions. [2022-11-16 12:18:39,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:18:39,273 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:39,273 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:18:39,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:18:39,274 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:18:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:39,275 INFO L85 PathProgramCache]: Analyzing trace with hash 18635, now seen corresponding path program 1 times [2022-11-16 12:18:39,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:39,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950521563] [2022-11-16 12:18:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:39,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:39,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:39,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950521563] [2022-11-16 12:18:39,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950521563] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:39,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:39,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:39,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846580572] [2022-11-16 12:18:39,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:39,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:39,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:39,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:39,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:39,540 INFO L87 Difference]: Start difference. First operand 147 states and 268 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:39,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:39,618 INFO L93 Difference]: Finished difference Result 137 states and 255 transitions. [2022-11-16 12:18:39,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:18:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:39,620 INFO L225 Difference]: With dead ends: 137 [2022-11-16 12:18:39,621 INFO L226 Difference]: Without dead ends: 137 [2022-11-16 12:18:39,621 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 [2022-11-16 12:18:39,622 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:39,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 4 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-16 12:18:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-16 12:18:39,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 125 states have (on average 2.04) internal successors, (255), 136 states have internal predecessors, (255), 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) [2022-11-16 12:18:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 255 transitions. [2022-11-16 12:18:39,650 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 255 transitions. Word has length 2 [2022-11-16 12:18:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:39,651 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 255 transitions. [2022-11-16 12:18:39,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:39,651 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 255 transitions. [2022-11-16 12:18:39,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-16 12:18:39,652 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:39,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-16 12:18:39,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:18:39,652 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:18:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash 555497777, now seen corresponding path program 1 times [2022-11-16 12:18:39,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:39,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467064252] [2022-11-16 12:18:39,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:39,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:39,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:39,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:39,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467064252] [2022-11-16 12:18:39,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467064252] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015519542] [2022-11-16 12:18:39,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:39,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:39,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:39,787 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:39,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:18:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:39,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:18:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:39,990 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:18:40,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:40,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:40,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:40,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015519542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:40,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:40,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:18:40,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525116270] [2022-11-16 12:18:40,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:40,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:18:40,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:40,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:18:40,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:18:40,125 INFO L87 Difference]: Start difference. First operand 137 states and 255 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-16 12:18:40,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:40,223 INFO L93 Difference]: Finished difference Result 31 states and 48 transitions. [2022-11-16 12:18:40,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-16 12:18:40,224 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 5 [2022-11-16 12:18:40,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:40,224 INFO L225 Difference]: With dead ends: 31 [2022-11-16 12:18:40,225 INFO L226 Difference]: Without dead ends: 31 [2022-11-16 12:18:40,225 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-16 12:18:40,229 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 37 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:40,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 3 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:40,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-16 12:18:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-16 12:18:40,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 30 states have internal predecessors, (48), 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) [2022-11-16 12:18:40,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 48 transitions. [2022-11-16 12:18:40,245 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 48 transitions. Word has length 5 [2022-11-16 12:18:40,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:40,246 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 48 transitions. [2022-11-16 12:18:40,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2022-11-16 12:18:40,246 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 48 transitions. [2022-11-16 12:18:40,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:18:40,247 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:40,247 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-16 12:18:40,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:40,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:40,454 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2022-11-16 12:18:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash 40562241, now seen corresponding path program 1 times [2022-11-16 12:18:40,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:40,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356063195] [2022-11-16 12:18:40,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:40,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:18:40,475 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:18:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:18:40,506 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:18:40,508 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:18:40,510 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-11-16 12:18:40,512 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2022-11-16 12:18:40,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2022-11-16 12:18:40,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2022-11-16 12:18:40,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2022-11-16 12:18:40,513 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (2 of 8 remaining) [2022-11-16 12:18:40,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 8 remaining) [2022-11-16 12:18:40,514 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2022-11-16 12:18:40,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:18:40,517 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-16 12:18:40,519 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:18:40,519 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-16 12:18:40,554 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:18:40,565 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:18:40,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 180 transitions, 378 flow [2022-11-16 12:18:40,567 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 180 transitions, 378 flow [2022-11-16 12:18:40,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 180 transitions, 378 flow [2022-11-16 12:18:40,676 INFO L130 PetriNetUnfolder]: 43/376 cut-off events. [2022-11-16 12:18:40,676 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-16 12:18:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 376 events. 43/376 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1404 event pairs, 0 based on Foata normal form. 0/309 useless extension candidates. Maximal degree in co-relation 241. Up to 9 conditions per place. [2022-11-16 12:18:40,688 INFO L119 LiptonReduction]: Number of co-enabled transitions 9284 [2022-11-16 12:18:45,642 INFO L134 LiptonReduction]: Checked pairs total: 15093 [2022-11-16 12:18:45,643 INFO L136 LiptonReduction]: Total number of compositions: 173 [2022-11-16 12:18:45,644 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 43 places, 53 transitions, 124 flow [2022-11-16 12:18:45,738 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1316 states, 1259 states have (on average 3.65845909451946) internal successors, (4606), 1315 states have internal predecessors, (4606), 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) [2022-11-16 12:18:45,740 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:18:45,740 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;@f25b8c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:18:45,741 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-11-16 12:18:45,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 1316 states, 1259 states have (on average 3.65845909451946) internal successors, (4606), 1315 states have internal predecessors, (4606), 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) [2022-11-16 12:18:45,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:18:45,746 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:45,747 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:18:45,747 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 12:18:45,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:45,748 INFO L85 PathProgramCache]: Analyzing trace with hash 30696, now seen corresponding path program 1 times [2022-11-16 12:18:45,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:45,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938988230] [2022-11-16 12:18:45,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:45,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:45,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:45,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:45,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938988230] [2022-11-16 12:18:45,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938988230] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:45,785 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:45,785 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:45,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911226754] [2022-11-16 12:18:45,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:45,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:45,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:45,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:45,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:45,792 INFO L87 Difference]: Start difference. First operand has 1316 states, 1259 states have (on average 3.65845909451946) internal successors, (4606), 1315 states have internal predecessors, (4606), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:45,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:45,908 INFO L93 Difference]: Finished difference Result 1195 states and 3117 transitions. [2022-11-16 12:18:45,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:45,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:18:45,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:45,918 INFO L225 Difference]: With dead ends: 1195 [2022-11-16 12:18:45,918 INFO L226 Difference]: Without dead ends: 1179 [2022-11-16 12:18:45,919 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 [2022-11-16 12:18:45,920 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:45,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:45,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-11-16 12:18:46,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1179. [2022-11-16 12:18:46,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1142 states have (on average 2.6943957968476355) internal successors, (3077), 1178 states have internal predecessors, (3077), 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) [2022-11-16 12:18:46,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 3077 transitions. [2022-11-16 12:18:46,015 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 3077 transitions. Word has length 2 [2022-11-16 12:18:46,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:46,016 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 3077 transitions. [2022-11-16 12:18:46,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:46,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 3077 transitions. [2022-11-16 12:18:46,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:18:46,017 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:46,017 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:18:46,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:18:46,018 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 12:18:46,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:46,019 INFO L85 PathProgramCache]: Analyzing trace with hash 30697, now seen corresponding path program 1 times [2022-11-16 12:18:46,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:46,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893964292] [2022-11-16 12:18:46,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:46,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:46,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:46,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:46,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893964292] [2022-11-16 12:18:46,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893964292] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:46,104 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:46,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:46,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848494065] [2022-11-16 12:18:46,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:46,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:46,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:46,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:46,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:46,107 INFO L87 Difference]: Start difference. First operand 1179 states and 3077 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:46,236 INFO L93 Difference]: Finished difference Result 1169 states and 3064 transitions. [2022-11-16 12:18:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:46,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:18:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:46,244 INFO L225 Difference]: With dead ends: 1169 [2022-11-16 12:18:46,245 INFO L226 Difference]: Without dead ends: 1169 [2022-11-16 12:18:46,245 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 [2022-11-16 12:18:46,246 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 9 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:46,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-11-16 12:18:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1169. [2022-11-16 12:18:46,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1169 states, 1133 states have (on average 2.70432480141218) internal successors, (3064), 1168 states have internal predecessors, (3064), 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) [2022-11-16 12:18:46,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1169 states to 1169 states and 3064 transitions. [2022-11-16 12:18:46,331 INFO L78 Accepts]: Start accepts. Automaton has 1169 states and 3064 transitions. Word has length 2 [2022-11-16 12:18:46,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:46,332 INFO L495 AbstractCegarLoop]: Abstraction has 1169 states and 3064 transitions. [2022-11-16 12:18:46,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1169 states and 3064 transitions. [2022-11-16 12:18:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:18:46,334 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:46,334 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:18:46,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:18:46,335 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 12:18:46,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:46,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1694236697, now seen corresponding path program 1 times [2022-11-16 12:18:46,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:46,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179156391] [2022-11-16 12:18:46,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:46,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:46,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:46,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:46,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179156391] [2022-11-16 12:18:46,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179156391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764347496] [2022-11-16 12:18:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:46,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:46,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:46,444 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:46,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:18:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:46,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:18:46,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:46,563 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:18:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:46,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:46,701 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:46,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764347496] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:46,702 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:46,702 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:18:46,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184178894] [2022-11-16 12:18:46,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:46,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:18:46,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:46,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:18:46,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:18:46,704 INFO L87 Difference]: Start difference. First operand 1169 states and 3064 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-16 12:18:47,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:47,003 INFO L93 Difference]: Finished difference Result 1050 states and 2780 transitions. [2022-11-16 12:18:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-16 12:18:47,004 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 6 [2022-11-16 12:18:47,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:47,010 INFO L225 Difference]: With dead ends: 1050 [2022-11-16 12:18:47,011 INFO L226 Difference]: Without dead ends: 1050 [2022-11-16 12:18:47,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-16 12:18:47,012 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 168 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:47,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 18 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:18:47,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2022-11-16 12:18:47,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 1050. [2022-11-16 12:18:47,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1050 states, 1020 states have (on average 2.7254901960784315) internal successors, (2780), 1049 states have internal predecessors, (2780), 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) [2022-11-16 12:18:47,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 2780 transitions. [2022-11-16 12:18:47,052 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 2780 transitions. Word has length 6 [2022-11-16 12:18:47,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:47,053 INFO L495 AbstractCegarLoop]: Abstraction has 1050 states and 2780 transitions. [2022-11-16 12:18:47,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-16 12:18:47,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 2780 transitions. [2022-11-16 12:18:47,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:18:47,054 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:47,054 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:18:47,067 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:47,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 12:18:47,261 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 12:18:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:47,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1693992012, now seen corresponding path program 1 times [2022-11-16 12:18:47,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:47,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754460286] [2022-11-16 12:18:47,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:47,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:47,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:47,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:47,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754460286] [2022-11-16 12:18:47,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754460286] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:47,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:47,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:47,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680118014] [2022-11-16 12:18:47,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:47,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:47,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:47,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:47,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:47,327 INFO L87 Difference]: Start difference. First operand 1050 states and 2780 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-16 12:18:47,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:47,449 INFO L93 Difference]: Finished difference Result 1612 states and 4113 transitions. [2022-11-16 12:18:47,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:47,450 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-16 12:18:47,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:47,466 INFO L225 Difference]: With dead ends: 1612 [2022-11-16 12:18:47,466 INFO L226 Difference]: Without dead ends: 1579 [2022-11-16 12:18:47,466 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 [2022-11-16 12:18:47,468 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:47,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 6 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1579 states. [2022-11-16 12:18:47,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1579 to 1323. [2022-11-16 12:18:47,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1296 states have (on average 2.7160493827160495) internal successors, (3520), 1322 states have internal predecessors, (3520), 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) [2022-11-16 12:18:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 3520 transitions. [2022-11-16 12:18:47,542 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 3520 transitions. Word has length 6 [2022-11-16 12:18:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:47,543 INFO L495 AbstractCegarLoop]: Abstraction has 1323 states and 3520 transitions. [2022-11-16 12:18:47,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-16 12:18:47,543 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 3520 transitions. [2022-11-16 12:18:47,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-16 12:18:47,545 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:47,545 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-16 12:18:47,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:18:47,546 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2022-11-16 12:18:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:47,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1542332945, now seen corresponding path program 1 times [2022-11-16 12:18:47,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852237231] [2022-11-16 12:18:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:47,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:18:47,570 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:18:47,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:18:47,601 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:18:47,602 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:18:47,602 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (8 of 9 remaining) [2022-11-16 12:18:47,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 9 remaining) [2022-11-16 12:18:47,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 9 remaining) [2022-11-16 12:18:47,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 9 remaining) [2022-11-16 12:18:47,603 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 9 remaining) [2022-11-16 12:18:47,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (3 of 9 remaining) [2022-11-16 12:18:47,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 9 remaining) [2022-11-16 12:18:47,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 9 remaining) [2022-11-16 12:18:47,604 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 9 remaining) [2022-11-16 12:18:47,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:18:47,605 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:18:47,606 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:18:47,606 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-16 12:18:47,639 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-16 12:18:47,643 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:18:47,644 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 188 places, 204 transitions, 438 flow [2022-11-16 12:18:47,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 188 places, 204 transitions, 438 flow [2022-11-16 12:18:47,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 204 transitions, 438 flow [2022-11-16 12:18:47,738 INFO L130 PetriNetUnfolder]: 65/556 cut-off events. [2022-11-16 12:18:47,738 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-16 12:18:47,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 556 events. 65/556 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2353 event pairs, 1 based on Foata normal form. 0/452 useless extension candidates. Maximal degree in co-relation 384. Up to 16 conditions per place. [2022-11-16 12:18:47,761 INFO L119 LiptonReduction]: Number of co-enabled transitions 15576 [2022-11-16 12:18:52,968 INFO L134 LiptonReduction]: Checked pairs total: 25993 [2022-11-16 12:18:52,969 INFO L136 LiptonReduction]: Total number of compositions: 195 [2022-11-16 12:18:52,969 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 52 places, 65 transitions, 160 flow [2022-11-16 12:18:53,418 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 9751 states, 9598 states have (on average 4.903000625130235) internal successors, (47059), 9750 states have internal predecessors, (47059), 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) [2022-11-16 12:18:53,419 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:18:53,419 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;@f25b8c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:18:53,419 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2022-11-16 12:18:53,451 INFO L276 IsEmpty]: Start isEmpty. Operand has 9751 states, 9598 states have (on average 4.903000625130235) internal successors, (47059), 9750 states have internal predecessors, (47059), 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) [2022-11-16 12:18:53,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:18:53,452 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:53,452 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:18:53,452 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-16 12:18:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:53,453 INFO L85 PathProgramCache]: Analyzing trace with hash 44227, now seen corresponding path program 1 times [2022-11-16 12:18:53,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:53,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662533909] [2022-11-16 12:18:53,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:53,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:53,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:53,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:53,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:53,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662533909] [2022-11-16 12:18:53,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662533909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:53,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:53,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141395591] [2022-11-16 12:18:53,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:53,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:53,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:53,522 INFO L87 Difference]: Start difference. First operand has 9751 states, 9598 states have (on average 4.903000625130235) internal successors, (47059), 9750 states have internal predecessors, (47059), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:53,834 INFO L93 Difference]: Finished difference Result 8839 states and 30166 transitions. [2022-11-16 12:18:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:53,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:18:53,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:53,928 INFO L225 Difference]: With dead ends: 8839 [2022-11-16 12:18:53,928 INFO L226 Difference]: Without dead ends: 8775 [2022-11-16 12:18:53,928 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 [2022-11-16 12:18:53,929 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:53,930 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 8 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:53,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8775 states. [2022-11-16 12:18:54,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8775 to 8775. [2022-11-16 12:18:54,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8775 states, 8672 states have (on average 3.454566420664207) internal successors, (29958), 8774 states have internal predecessors, (29958), 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) [2022-11-16 12:18:54,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8775 states to 8775 states and 29958 transitions. [2022-11-16 12:18:54,396 INFO L78 Accepts]: Start accepts. Automaton has 8775 states and 29958 transitions. Word has length 2 [2022-11-16 12:18:54,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:54,397 INFO L495 AbstractCegarLoop]: Abstraction has 8775 states and 29958 transitions. [2022-11-16 12:18:54,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 8775 states and 29958 transitions. [2022-11-16 12:18:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:18:54,398 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:54,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:18:54,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:18:54,398 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-16 12:18:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:54,399 INFO L85 PathProgramCache]: Analyzing trace with hash 44228, now seen corresponding path program 1 times [2022-11-16 12:18:54,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:54,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466295421] [2022-11-16 12:18:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:54,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:54,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:54,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:54,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466295421] [2022-11-16 12:18:54,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466295421] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:54,449 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:54,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:54,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351750060] [2022-11-16 12:18:54,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:54,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:54,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:54,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:54,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:54,451 INFO L87 Difference]: Start difference. First operand 8775 states and 29958 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:54,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:54,623 INFO L93 Difference]: Finished difference Result 8765 states and 29945 transitions. [2022-11-16 12:18:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:54,624 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:18:54,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:54,800 INFO L225 Difference]: With dead ends: 8765 [2022-11-16 12:18:54,800 INFO L226 Difference]: Without dead ends: 8765 [2022-11-16 12:18:54,801 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 [2022-11-16 12:18:54,802 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:54,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:54,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8765 states. [2022-11-16 12:18:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8765 to 8765. [2022-11-16 12:18:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8765 states, 8663 states have (on average 3.45665473854323) internal successors, (29945), 8764 states have internal predecessors, (29945), 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) [2022-11-16 12:18:55,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8765 states to 8765 states and 29945 transitions. [2022-11-16 12:18:55,482 INFO L78 Accepts]: Start accepts. Automaton has 8765 states and 29945 transitions. Word has length 2 [2022-11-16 12:18:55,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:55,483 INFO L495 AbstractCegarLoop]: Abstraction has 8765 states and 29945 transitions. [2022-11-16 12:18:55,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:18:55,483 INFO L276 IsEmpty]: Start isEmpty. Operand 8765 states and 29945 transitions. [2022-11-16 12:18:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:18:55,487 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:55,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:18:55,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:18:55,488 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-16 12:18:55,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:55,489 INFO L85 PathProgramCache]: Analyzing trace with hash -2070396282, now seen corresponding path program 1 times [2022-11-16 12:18:55,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:55,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213940996] [2022-11-16 12:18:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:55,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:55,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:55,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213940996] [2022-11-16 12:18:55,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213940996] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:18:55,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:18:55,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:18:55,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705679036] [2022-11-16 12:18:55,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:18:55,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:18:55,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:55,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:18:55,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:18:55,614 INFO L87 Difference]: Start difference. First operand 8765 states and 29945 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-16 12:18:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:55,910 INFO L93 Difference]: Finished difference Result 13572 states and 43936 transitions. [2022-11-16 12:18:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:18:55,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-16 12:18:55,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:56,005 INFO L225 Difference]: With dead ends: 13572 [2022-11-16 12:18:56,005 INFO L226 Difference]: Without dead ends: 13293 [2022-11-16 12:18:56,005 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 [2022-11-16 12:18:56,006 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 38 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:56,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 10 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13293 states. [2022-11-16 12:18:56,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13293 to 11887. [2022-11-16 12:18:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11887 states, 11803 states have (on average 3.3601626705074983) internal successors, (39660), 11886 states have internal predecessors, (39660), 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) [2022-11-16 12:18:56,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11887 states to 11887 states and 39660 transitions. [2022-11-16 12:18:56,702 INFO L78 Accepts]: Start accepts. Automaton has 11887 states and 39660 transitions. Word has length 6 [2022-11-16 12:18:56,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:56,702 INFO L495 AbstractCegarLoop]: Abstraction has 11887 states and 39660 transitions. [2022-11-16 12:18:56,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-16 12:18:56,702 INFO L276 IsEmpty]: Start isEmpty. Operand 11887 states and 39660 transitions. [2022-11-16 12:18:56,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:18:56,703 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:56,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:18:56,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:18:56,703 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-16 12:18:56,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2070713900, now seen corresponding path program 1 times [2022-11-16 12:18:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:56,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267155249] [2022-11-16 12:18:56,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:56,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,790 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:56,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:18:56,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267155249] [2022-11-16 12:18:56,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267155249] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:18:56,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214066254] [2022-11-16 12:18:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:56,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:56,791 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:18:56,795 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:18:56,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:18:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:18:56,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:18:56,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:18:56,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:18:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:56,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:18:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:18:57,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214066254] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:18:57,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:18:57,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:18:57,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161885052] [2022-11-16 12:18:57,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:18:57,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:18:57,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:18:57,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:18:57,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:18:57,132 INFO L87 Difference]: Start difference. First operand 11887 states and 39660 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-16 12:18:57,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:18:57,314 INFO L93 Difference]: Finished difference Result 1251 states and 3995 transitions. [2022-11-16 12:18:57,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:18:57,315 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 6 [2022-11-16 12:18:57,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:18:57,321 INFO L225 Difference]: With dead ends: 1251 [2022-11-16 12:18:57,321 INFO L226 Difference]: Without dead ends: 1251 [2022-11-16 12:18:57,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:18:57,322 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 149 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:18:57,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 20 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:18:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-11-16 12:18:57,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1251. [2022-11-16 12:18:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.196) internal successors, (3995), 1250 states have internal predecessors, (3995), 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) [2022-11-16 12:18:57,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3995 transitions. [2022-11-16 12:18:57,369 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3995 transitions. Word has length 6 [2022-11-16 12:18:57,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:18:57,369 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 3995 transitions. [2022-11-16 12:18:57,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-16 12:18:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3995 transitions. [2022-11-16 12:18:57,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-16 12:18:57,378 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:18:57,378 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-16 12:18:57,388 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:18:57,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:18:57,583 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 7 more)] === [2022-11-16 12:18:57,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:18:57,585 INFO L85 PathProgramCache]: Analyzing trace with hash -991144751, now seen corresponding path program 1 times [2022-11-16 12:18:57,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:18:57,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952615382] [2022-11-16 12:18:57,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:18:57,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:18:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:18:57,632 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:18:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:18:57,692 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:18:57,696 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:18:57,696 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (9 of 10 remaining) [2022-11-16 12:18:57,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 10 remaining) [2022-11-16 12:18:57,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 10 remaining) [2022-11-16 12:18:57,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 10 remaining) [2022-11-16 12:18:57,697 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 10 remaining) [2022-11-16 12:18:57,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (4 of 10 remaining) [2022-11-16 12:18:57,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 10 remaining) [2022-11-16 12:18:57,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 10 remaining) [2022-11-16 12:18:57,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 10 remaining) [2022-11-16 12:18:57,698 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 10 remaining) [2022-11-16 12:18:57,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:18:57,700 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:18:57,700 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:18:57,700 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-16 12:18:57,739 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-16 12:18:57,755 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:18:57,756 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 210 places, 228 transitions, 500 flow [2022-11-16 12:18:57,756 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 210 places, 228 transitions, 500 flow [2022-11-16 12:18:57,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 210 places, 228 transitions, 500 flow [2022-11-16 12:18:57,929 INFO L130 PetriNetUnfolder]: 99/824 cut-off events. [2022-11-16 12:18:57,930 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-16 12:18:57,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 879 conditions, 824 events. 99/824 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 3863 event pairs, 6 based on Foata normal form. 0/663 useless extension candidates. Maximal degree in co-relation 576. Up to 32 conditions per place. [2022-11-16 12:18:57,967 INFO L119 LiptonReduction]: Number of co-enabled transitions 22968 [2022-11-16 12:19:03,311 INFO L134 LiptonReduction]: Checked pairs total: 40557 [2022-11-16 12:19:03,311 INFO L136 LiptonReduction]: Total number of compositions: 217 [2022-11-16 12:19:03,312 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 61 places, 73 transitions, 190 flow [2022-11-16 12:19:06,218 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 72380 states, 71963 states have (on average 5.64476189152759) internal successors, (406214), 72379 states have internal predecessors, (406214), 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) [2022-11-16 12:19:06,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:19:06,230 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;@f25b8c8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:19:06,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2022-11-16 12:19:06,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 72380 states, 71963 states have (on average 5.64476189152759) internal successors, (406214), 72379 states have internal predecessors, (406214), 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) [2022-11-16 12:19:06,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:19:06,364 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:06,364 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:19:06,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 12:19:06,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:06,367 INFO L85 PathProgramCache]: Analyzing trace with hash 59225, now seen corresponding path program 1 times [2022-11-16 12:19:06,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:06,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854990019] [2022-11-16 12:19:06,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:06,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:06,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:06,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854990019] [2022-11-16 12:19:06,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854990019] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:06,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:19:06,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:19:06,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608914024] [2022-11-16 12:19:06,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:06,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:19:06,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:19:06,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:19:06,532 INFO L87 Difference]: Start difference. First operand has 72380 states, 71963 states have (on average 5.64476189152759) internal successors, (406214), 72379 states have internal predecessors, (406214), 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 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:19:08,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:08,239 INFO L93 Difference]: Finished difference Result 65483 states and 276077 transitions. [2022-11-16 12:19:08,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:19:08,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:19:08,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:08,988 INFO L225 Difference]: With dead ends: 65483 [2022-11-16 12:19:08,988 INFO L226 Difference]: Without dead ends: 65227 [2022-11-16 12:19:08,988 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 [2022-11-16 12:19:08,990 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 53 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:08,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 8 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:19:09,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65227 states. [2022-11-16 12:19:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65227 to 65227. [2022-11-16 12:19:12,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65227 states, 64938 states have (on average 4.23562474976131) internal successors, (275053), 65226 states have internal predecessors, (275053), 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) [2022-11-16 12:19:13,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65227 states to 65227 states and 275053 transitions. [2022-11-16 12:19:13,055 INFO L78 Accepts]: Start accepts. Automaton has 65227 states and 275053 transitions. Word has length 2 [2022-11-16 12:19:13,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:13,055 INFO L495 AbstractCegarLoop]: Abstraction has 65227 states and 275053 transitions. [2022-11-16 12:19:13,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:19:13,055 INFO L276 IsEmpty]: Start isEmpty. Operand 65227 states and 275053 transitions. [2022-11-16 12:19:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-16 12:19:13,055 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:13,056 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-16 12:19:13,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:19:13,056 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 12:19:13,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash 59226, now seen corresponding path program 1 times [2022-11-16 12:19:13,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:13,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103490781] [2022-11-16 12:19:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:13,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103490781] [2022-11-16 12:19:13,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103490781] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:13,125 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:19:13,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:19:13,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361607009] [2022-11-16 12:19:13,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:13,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:19:13,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:13,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:19:13,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:19:13,126 INFO L87 Difference]: Start difference. First operand 65227 states and 275053 transitions. Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:19:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:14,371 INFO L93 Difference]: Finished difference Result 65217 states and 275040 transitions. [2022-11-16 12:19:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:19:14,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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 2 [2022-11-16 12:19:14,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:15,370 INFO L225 Difference]: With dead ends: 65217 [2022-11-16 12:19:15,370 INFO L226 Difference]: Without dead ends: 65217 [2022-11-16 12:19:15,371 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 [2022-11-16 12:19:15,371 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:15,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-16 12:19:15,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65217 states. [2022-11-16 12:19:17,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65217 to 65217. [2022-11-16 12:19:17,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65217 states, 64929 states have (on average 4.236011643487502) internal successors, (275040), 65216 states have internal predecessors, (275040), 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) [2022-11-16 12:19:18,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65217 states to 65217 states and 275040 transitions. [2022-11-16 12:19:18,763 INFO L78 Accepts]: Start accepts. Automaton has 65217 states and 275040 transitions. Word has length 2 [2022-11-16 12:19:18,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:18,763 INFO L495 AbstractCegarLoop]: Abstraction has 65217 states and 275040 transitions. [2022-11-16 12:19:18,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2022-11-16 12:19:18,764 INFO L276 IsEmpty]: Start isEmpty. Operand 65217 states and 275040 transitions. [2022-11-16 12:19:18,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:19:18,765 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:18,765 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:19:18,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:19:18,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 12:19:18,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:18,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1090657157, now seen corresponding path program 1 times [2022-11-16 12:19:18,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:18,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425594760] [2022-11-16 12:19:18,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:18,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:18,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:18,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425594760] [2022-11-16 12:19:18,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425594760] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:19:18,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:19:18,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-16 12:19:18,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501142518] [2022-11-16 12:19:18,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:19:18,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 12:19:18,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:18,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 12:19:18,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-16 12:19:18,904 INFO L87 Difference]: Start difference. First operand 65217 states and 275040 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-16 12:19:20,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:20,644 INFO L93 Difference]: Finished difference Result 103240 states and 408157 transitions. [2022-11-16 12:19:20,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 12:19:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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 [2022-11-16 12:19:20,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:21,359 INFO L225 Difference]: With dead ends: 103240 [2022-11-16 12:19:21,359 INFO L226 Difference]: Without dead ends: 101095 [2022-11-16 12:19:21,360 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 [2022-11-16 12:19:21,360 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:21,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 10 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-16 12:19:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101095 states. [2022-11-16 12:19:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101095 to 94470. [2022-11-16 12:19:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94470 states, 94223 states have (on average 4.03864236969742) internal successors, (380533), 94469 states have internal predecessors, (380533), 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) [2022-11-16 12:19:25,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94470 states to 94470 states and 380533 transitions. [2022-11-16 12:19:25,315 INFO L78 Accepts]: Start accepts. Automaton has 94470 states and 380533 transitions. Word has length 6 [2022-11-16 12:19:25,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:25,316 INFO L495 AbstractCegarLoop]: Abstraction has 94470 states and 380533 transitions. [2022-11-16 12:19:25,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 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) [2022-11-16 12:19:25,316 INFO L276 IsEmpty]: Start isEmpty. Operand 94470 states and 380533 transitions. [2022-11-16 12:19:25,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-16 12:19:25,316 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:25,317 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-16 12:19:25,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:19:25,317 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 12:19:25,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1090968249, now seen corresponding path program 1 times [2022-11-16 12:19:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035130091] [2022-11-16 12:19:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:25,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:25,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:25,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:19:25,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035130091] [2022-11-16 12:19:25,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035130091] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:19:25,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697946208] [2022-11-16 12:19:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:25,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:19:25,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:19:25,412 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:19:25,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:19:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:19:25,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-16 12:19:25,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:19:26,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-16 12:19:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:26,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:19:26,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:19:26,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697946208] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:19:26,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:19:26,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-16 12:19:26,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092650978] [2022-11-16 12:19:26,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:19:26,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-16 12:19:26,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:19:26,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-16 12:19:26,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-16 12:19:26,472 INFO L87 Difference]: Start difference. First operand 94470 states and 380533 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-16 12:19:27,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 12:19:27,584 INFO L93 Difference]: Finished difference Result 87063 states and 352718 transitions. [2022-11-16 12:19:27,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:19:27,584 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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 6 [2022-11-16 12:19:27,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 12:19:28,040 INFO L225 Difference]: With dead ends: 87063 [2022-11-16 12:19:28,040 INFO L226 Difference]: Without dead ends: 87063 [2022-11-16 12:19:28,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2022-11-16 12:19:28,041 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 213 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-16 12:19:28,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 29 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-16 12:19:29,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87063 states. [2022-11-16 12:19:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87063 to 87063. [2022-11-16 12:19:31,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87063 states, 86820 states have (on average 4.062635337479843) internal successors, (352718), 87062 states have internal predecessors, (352718), 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) [2022-11-16 12:19:32,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87063 states to 87063 states and 352718 transitions. [2022-11-16 12:19:32,656 INFO L78 Accepts]: Start accepts. Automaton has 87063 states and 352718 transitions. Word has length 6 [2022-11-16 12:19:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 12:19:32,671 INFO L495 AbstractCegarLoop]: Abstraction has 87063 states and 352718 transitions. [2022-11-16 12:19:32,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 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) [2022-11-16 12:19:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 87063 states and 352718 transitions. [2022-11-16 12:19:32,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-16 12:19:32,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 12:19:32,684 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-16 12:19:32,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-11-16 12:19:32,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a0ba09b-8ae0-4385-9e83-dee9c0412822/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-16 12:19:32,889 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2022-11-16 12:19:32,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:19:32,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1188350647, now seen corresponding path program 1 times [2022-11-16 12:19:32,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:19:32,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124451553] [2022-11-16 12:19:32,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:19:32,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:19:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:19:32,922 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-16 12:19:32,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-16 12:19:32,951 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-16 12:19:32,951 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-16 12:19:32,952 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (10 of 11 remaining) [2022-11-16 12:19:32,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 11 remaining) [2022-11-16 12:19:32,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 11 remaining) [2022-11-16 12:19:32,952 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 11 remaining) [2022-11-16 12:19:32,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 11 remaining) [2022-11-16 12:19:32,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (5 of 11 remaining) [2022-11-16 12:19:32,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (4 of 11 remaining) [2022-11-16 12:19:32,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (3 of 11 remaining) [2022-11-16 12:19:32,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (2 of 11 remaining) [2022-11-16 12:19:32,953 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (1 of 11 remaining) [2022-11-16 12:19:32,954 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONMEMORY_LEAK (0 of 11 remaining) [2022-11-16 12:19:32,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:19:32,954 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-16 12:19:32,955 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-16 12:19:32,955 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-16 12:19:32,992 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-16 12:19:32,995 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-16 12:19:32,995 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 232 places, 252 transitions, 564 flow [2022-11-16 12:19:32,995 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 232 places, 252 transitions, 564 flow [2022-11-16 12:19:32,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 232 places, 252 transitions, 564 flow [2022-11-16 12:19:33,249 INFO L130 PetriNetUnfolder]: 161/1272 cut-off events. [2022-11-16 12:19:33,250 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-16 12:19:33,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1383 conditions, 1272 events. 161/1272 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6900 event pairs, 23 based on Foata normal form. 0/1014 useless extension candidates. Maximal degree in co-relation 869. Up to 80 conditions per place. [2022-11-16 12:19:33,308 INFO L119 LiptonReduction]: Number of co-enabled transitions 31460 [2022-11-16 12:19:38,888 INFO L134 LiptonReduction]: Checked pairs total: 54505 [2022-11-16 12:19:38,888 INFO L136 LiptonReduction]: Total number of compositions: 242 [2022-11-16 12:19:38,889 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 70 places, 83 transitions, 226 flow