./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b5237d83 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_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a --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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- 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-b5237d8 [2022-11-21 16:23:23,159 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 16:23:23,162 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 16:23:23,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 16:23:23,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 16:23:23,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 16:23:23,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 16:23:23,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 16:23:23,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 16:23:23,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 16:23:23,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 16:23:23,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 16:23:23,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 16:23:23,241 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 16:23:23,246 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 16:23:23,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 16:23:23,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 16:23:23,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 16:23:23,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 16:23:23,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 16:23:23,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 16:23:23,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 16:23:23,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 16:23:23,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 16:23:23,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 16:23:23,267 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 16:23:23,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 16:23:23,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 16:23:23,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 16:23:23,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 16:23:23,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 16:23:23,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 16:23:23,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 16:23:23,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 16:23:23,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 16:23:23,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 16:23:23,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 16:23:23,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 16:23:23,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 16:23:23,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 16:23:23,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 16:23:23,297 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-21 16:23:23,352 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 16:23:23,353 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 16:23:23,353 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 16:23:23,353 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 16:23:23,354 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 16:23:23,354 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 16:23:23,354 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 16:23:23,355 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 16:23:23,355 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 16:23:23,355 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 16:23:23,355 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 16:23:23,355 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-21 16:23:23,356 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 16:23:23,356 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 16:23:23,356 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 16:23:23,356 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-21 16:23:23,356 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-21 16:23:23,356 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-21 16:23:23,356 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 16:23:23,357 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-21 16:23:23,357 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 16:23:23,357 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 16:23:23,357 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 16:23:23,357 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 16:23:23,358 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 16:23:23,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:23:23,358 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 16:23:23,358 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 16:23:23,358 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 16:23:23,358 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 16:23:23,359 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_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2022-11-21 16:23:23,606 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 16:23:23,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 16:23:23,644 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 16:23:23,647 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 16:23:23,647 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 16:23:23,649 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-11-21 16:23:26,756 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 16:23:27,069 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 16:23:27,070 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2022-11-21 16:23:27,090 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/data/2a388b006/ee476ff72332454f9ee06a3408030a95/FLAGe69d8843c [2022-11-21 16:23:27,108 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/data/2a388b006/ee476ff72332454f9ee06a3408030a95 [2022-11-21 16:23:27,116 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 16:23:27,119 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 16:23:27,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 16:23:27,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 16:23:27,127 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 16:23:27,128 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,129 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53ff7450 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27, skipping insertion in model container [2022-11-21 16:23:27,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 16:23:27,208 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 16:23:27,544 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2022-11-21 16:23:27,577 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:23:27,595 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 16:23:27,666 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i[30176,30189] [2022-11-21 16:23:27,674 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 16:23:27,731 INFO L208 MainTranslator]: Completed translation [2022-11-21 16:23:27,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27 WrapperNode [2022-11-21 16:23:27,734 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 16:23:27,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 16:23:27,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 16:23:27,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 16:23:27,745 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,779 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,815 INFO L138 Inliner]: procedures = 171, calls = 30, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-11-21 16:23:27,816 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 16:23:27,816 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 16:23:27,817 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 16:23:27,817 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 16:23:27,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,840 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,861 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,862 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,864 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 16:23:27,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 16:23:27,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 16:23:27,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 16:23:27,874 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (1/1) ... [2022-11-21 16:23:27,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 16:23:27,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:27,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 16:23:27,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 16:23:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 16:23:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 16:23:27,958 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 16:23:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 16:23:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 16:23:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-21 16:23:27,959 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-21 16:23:27,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 16:23:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2022-11-21 16:23:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 16:23:27,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 16:23:27,960 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 16:23:27,962 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 16:23:28,188 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 16:23:28,190 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 16:23:28,496 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 16:23:28,504 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 16:23:28,504 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-21 16:23:28,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:23:28 BoogieIcfgContainer [2022-11-21 16:23:28,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 16:23:28,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 16:23:28,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 16:23:28,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 16:23:28,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 04:23:27" (1/3) ... [2022-11-21 16:23:28,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c70e177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:23:28, skipping insertion in model container [2022-11-21 16:23:28,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 04:23:27" (2/3) ... [2022-11-21 16:23:28,522 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c70e177 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 04:23:28, skipping insertion in model container [2022-11-21 16:23:28,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 04:23:28" (3/3) ... [2022-11-21 16:23:28,524 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2022-11-21 16:23:28,546 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 16:23:28,546 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-11-21 16:23:28,547 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 16:23:28,611 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-21 16:23:28,674 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 16:23:28,726 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 106 places, 117 transitions, 242 flow [2022-11-21 16:23:28,730 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 106 places, 117 transitions, 242 flow [2022-11-21 16:23:28,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 117 transitions, 242 flow [2022-11-21 16:23:28,801 INFO L130 PetriNetUnfolder]: 21/164 cut-off events. [2022-11-21 16:23:28,802 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 16:23:28,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 164 events. 21/164 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 447 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 80. Up to 6 conditions per place. [2022-11-21 16:23:28,810 INFO L119 LiptonReduction]: Number of co-enabled transitions 2968 [2022-11-21 16:23:32,356 INFO L134 LiptonReduction]: Checked pairs total: 4675 [2022-11-21 16:23:32,357 INFO L136 LiptonReduction]: Total number of compositions: 105 [2022-11-21 16:23:32,365 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 39 transitions, 86 flow [2022-11-21 16:23:32,393 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 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) [2022-11-21 16:23:32,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:23:32,418 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;@3efb6bdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:23:32,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:23:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 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) [2022-11-21 16:23:32,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:23:32,426 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:32,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:23:32,427 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:32,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:32,432 INFO L85 PathProgramCache]: Analyzing trace with hash 14642, now seen corresponding path program 1 times [2022-11-21 16:23:32,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:32,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598229552] [2022-11-21 16:23:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:32,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:32,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:32,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:32,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:32,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598229552] [2022-11-21 16:23:32,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598229552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:32,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:32,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:23:32,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485363711] [2022-11-21 16:23:32,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:32,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:32,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:32,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:32,737 INFO L87 Difference]: Start difference. First operand has 197 states, 182 states have (on average 2.697802197802198) internal successors, (491), 196 states have internal predecessors, (491), 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) [2022-11-21 16:23:32,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:32,824 INFO L93 Difference]: Finished difference Result 175 states and 321 transitions. [2022-11-21 16:23:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:32,832 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 [2022-11-21 16:23:32,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:32,847 INFO L225 Difference]: With dead ends: 175 [2022-11-21 16:23:32,847 INFO L226 Difference]: Without dead ends: 164 [2022-11-21 16:23:32,848 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 [2022-11-21 16:23:32,851 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:32,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 3 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:23:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-11-21 16:23:32,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-11-21 16:23:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 155 states have (on average 1.9419354838709677) internal successors, (301), 163 states have internal predecessors, (301), 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) [2022-11-21 16:23:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 301 transitions. [2022-11-21 16:23:32,913 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 301 transitions. Word has length 2 [2022-11-21 16:23:32,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:32,914 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 301 transitions. [2022-11-21 16:23:32,914 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) [2022-11-21 16:23:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 301 transitions. [2022-11-21 16:23:32,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:23:32,915 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:32,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:23:32,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 16:23:32,918 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:32,919 INFO L85 PathProgramCache]: Analyzing trace with hash 14643, now seen corresponding path program 1 times [2022-11-21 16:23:32,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:32,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059501703] [2022-11-21 16:23:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:32,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:33,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:33,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059501703] [2022-11-21 16:23:33,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059501703] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:33,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:33,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:23:33,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068557099] [2022-11-21 16:23:33,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:33,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:33,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:33,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:33,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:33,134 INFO L87 Difference]: Start difference. First operand 164 states and 301 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) [2022-11-21 16:23:33,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:33,222 INFO L93 Difference]: Finished difference Result 157 states and 292 transitions. [2022-11-21 16:23:33,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:33,225 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 [2022-11-21 16:23:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:33,226 INFO L225 Difference]: With dead ends: 157 [2022-11-21 16:23:33,227 INFO L226 Difference]: Without dead ends: 157 [2022-11-21 16:23:33,227 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 [2022-11-21 16:23:33,229 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 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 [2022-11-21 16:23:33,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:23:33,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-11-21 16:23:33,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-11-21 16:23:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 150 states have (on average 1.9466666666666668) internal successors, (292), 156 states have internal predecessors, (292), 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) [2022-11-21 16:23:33,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 292 transitions. [2022-11-21 16:23:33,254 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 292 transitions. Word has length 2 [2022-11-21 16:23:33,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:33,254 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 292 transitions. [2022-11-21 16:23:33,255 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) [2022-11-21 16:23:33,256 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 292 transitions. [2022-11-21 16:23:33,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-21 16:23:33,256 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:33,257 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-21 16:23:33,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 16:23:33,257 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:33,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash 436492783, now seen corresponding path program 1 times [2022-11-21 16:23:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:33,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656438456] [2022-11-21 16:23:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:33,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:33,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:33,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:33,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656438456] [2022-11-21 16:23:33,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656438456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:23:33,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167866326] [2022-11-21 16:23:33,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:33,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:23:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:33,436 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:23:33,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 16:23:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:33,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:23:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:23:33,583 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 [2022-11-21 16:23:33,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:33,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:23:33,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:33,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167866326] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:23:33,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:23:33,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-21 16:23:33,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796305851] [2022-11-21 16:23:33,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:23:33,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:23:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:33,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:23:33,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:23:33,706 INFO L87 Difference]: Start difference. First operand 157 states and 292 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) [2022-11-21 16:23:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:33,783 INFO L93 Difference]: Finished difference Result 43 states and 69 transitions. [2022-11-21 16:23:33,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 16:23:33,783 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 [2022-11-21 16:23:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:33,784 INFO L225 Difference]: With dead ends: 43 [2022-11-21 16:23:33,784 INFO L226 Difference]: Without dead ends: 43 [2022-11-21 16:23:33,784 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 [2022-11-21 16:23:33,786 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:33,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 7 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-21 16:23:33,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-21 16:23:33,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-11-21 16:23:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 42 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 16:23:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 69 transitions. [2022-11-21 16:23:33,795 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 69 transitions. Word has length 5 [2022-11-21 16:23:33,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:33,795 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 69 transitions. [2022-11-21 16:23:33,796 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) [2022-11-21 16:23:33,796 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 69 transitions. [2022-11-21 16:23:33,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:23:33,796 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:33,796 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-21 16:23:33,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-21 16:23:33,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:23:33,997 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:33,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:33,998 INFO L85 PathProgramCache]: Analyzing trace with hash 646374644, now seen corresponding path program 1 times [2022-11-21 16:23:33,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:33,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181494922] [2022-11-21 16:23:33,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:33,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:23:34,011 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:23:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:23:34,051 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:23:34,051 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:23:34,052 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 16:23:34,054 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-21 16:23:34,070 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-21 16:23:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-21 16:23:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-21 16:23:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-21 16:23:34,071 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-21 16:23:34,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 16:23:34,074 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:23:34,076 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:23:34,076 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 16:23:34,098 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 16:23:34,109 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 16:23:34,109 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 131 places, 147 transitions, 312 flow [2022-11-21 16:23:34,109 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 131 places, 147 transitions, 312 flow [2022-11-21 16:23:34,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 131 places, 147 transitions, 312 flow [2022-11-21 16:23:34,204 INFO L130 PetriNetUnfolder]: 37/271 cut-off events. [2022-11-21 16:23:34,204 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-21 16:23:34,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 271 events. 37/271 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 857 event pairs, 0 based on Foata normal form. 0/209 useless extension candidates. Maximal degree in co-relation 166. Up to 9 conditions per place. [2022-11-21 16:23:34,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 8120 [2022-11-21 16:23:37,832 INFO L134 LiptonReduction]: Checked pairs total: 17293 [2022-11-21 16:23:37,832 INFO L136 LiptonReduction]: Total number of compositions: 124 [2022-11-21 16:23:37,833 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 50 places, 62 transitions, 142 flow [2022-11-21 16:23:37,945 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 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) [2022-11-21 16:23:37,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:23:37,947 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;@3efb6bdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:23:37,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:23:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 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) [2022-11-21 16:23:37,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:23:37,959 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:37,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:23:37,959 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:37,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:37,960 INFO L85 PathProgramCache]: Analyzing trace with hash 24270, now seen corresponding path program 1 times [2022-11-21 16:23:37,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:37,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980775282] [2022-11-21 16:23:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:37,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:37,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:37,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:37,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980775282] [2022-11-21 16:23:37,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980775282] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:37,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:37,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:23:37,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887729899] [2022-11-21 16:23:37,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:37,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:37,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:37,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:37,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:38,003 INFO L87 Difference]: Start difference. First operand has 3090 states, 3064 states have (on average 3.8051566579634466) internal successors, (11659), 3089 states have internal predecessors, (11659), 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) [2022-11-21 16:23:38,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:38,175 INFO L93 Difference]: Finished difference Result 2764 states and 7554 transitions. [2022-11-21 16:23:38,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:38,176 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 [2022-11-21 16:23:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:38,195 INFO L225 Difference]: With dead ends: 2764 [2022-11-21 16:23:38,195 INFO L226 Difference]: Without dead ends: 2595 [2022-11-21 16:23:38,196 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 [2022-11-21 16:23:38,197 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 43 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:38,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 17 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:23:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2595 states. [2022-11-21 16:23:38,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2595 to 2595. [2022-11-21 16:23:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2595 states, 2580 states have (on average 2.7515503875968994) internal successors, (7099), 2594 states have internal predecessors, (7099), 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) [2022-11-21 16:23:38,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2595 states to 2595 states and 7099 transitions. [2022-11-21 16:23:38,323 INFO L78 Accepts]: Start accepts. Automaton has 2595 states and 7099 transitions. Word has length 2 [2022-11-21 16:23:38,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:38,323 INFO L495 AbstractCegarLoop]: Abstraction has 2595 states and 7099 transitions. [2022-11-21 16:23:38,323 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) [2022-11-21 16:23:38,324 INFO L276 IsEmpty]: Start isEmpty. Operand 2595 states and 7099 transitions. [2022-11-21 16:23:38,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:23:38,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:38,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:23:38,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 16:23:38,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:38,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:38,326 INFO L85 PathProgramCache]: Analyzing trace with hash 24271, now seen corresponding path program 1 times [2022-11-21 16:23:38,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:38,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058703763] [2022-11-21 16:23:38,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:38,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:38,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:38,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:38,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058703763] [2022-11-21 16:23:38,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058703763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:38,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:38,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:23:38,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260980810] [2022-11-21 16:23:38,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:38,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:38,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:38,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:38,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:38,384 INFO L87 Difference]: Start difference. First operand 2595 states and 7099 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) [2022-11-21 16:23:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:38,509 INFO L93 Difference]: Finished difference Result 2588 states and 7090 transitions. [2022-11-21 16:23:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:38,510 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 [2022-11-21 16:23:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:38,524 INFO L225 Difference]: With dead ends: 2588 [2022-11-21 16:23:38,524 INFO L226 Difference]: Without dead ends: 2588 [2022-11-21 16:23:38,525 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 [2022-11-21 16:23:38,525 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:38,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:23:38,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2588 states. [2022-11-21 16:23:38,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2588 to 2588. [2022-11-21 16:23:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2588 states, 2575 states have (on average 2.753398058252427) internal successors, (7090), 2587 states have internal predecessors, (7090), 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) [2022-11-21 16:23:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2588 states to 2588 states and 7090 transitions. [2022-11-21 16:23:38,607 INFO L78 Accepts]: Start accepts. Automaton has 2588 states and 7090 transitions. Word has length 2 [2022-11-21 16:23:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:38,607 INFO L495 AbstractCegarLoop]: Abstraction has 2588 states and 7090 transitions. [2022-11-21 16:23:38,608 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) [2022-11-21 16:23:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2588 states and 7090 transitions. [2022-11-21 16:23:38,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:23:38,608 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:38,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:23:38,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 16:23:38,609 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:38,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:38,610 INFO L85 PathProgramCache]: Analyzing trace with hash 956561243, now seen corresponding path program 1 times [2022-11-21 16:23:38,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:38,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624424566] [2022-11-21 16:23:38,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:38,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:38,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:38,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624424566] [2022-11-21 16:23:38,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624424566] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:23:38,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509201900] [2022-11-21 16:23:38,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:38,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:23:38,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:38,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:23:38,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 16:23:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:23:38,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:23:38,787 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 [2022-11-21 16:23:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:38,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:23:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:38,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509201900] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:23:38,910 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:23:38,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-21 16:23:38,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890090664] [2022-11-21 16:23:38,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:23:38,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:23:38,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:38,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:23:38,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:23:38,912 INFO L87 Difference]: Start difference. First operand 2588 states and 7090 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) [2022-11-21 16:23:39,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:39,115 INFO L93 Difference]: Finished difference Result 771 states and 1991 transitions. [2022-11-21 16:23:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-21 16:23:39,116 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 [2022-11-21 16:23:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:39,119 INFO L225 Difference]: With dead ends: 771 [2022-11-21 16:23:39,120 INFO L226 Difference]: Without dead ends: 771 [2022-11-21 16:23:39,121 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 [2022-11-21 16:23:39,124 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:39,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 41 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:23:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2022-11-21 16:23:39,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 771. [2022-11-21 16:23:39,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 2.585714285714286) internal successors, (1991), 770 states have internal predecessors, (1991), 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) [2022-11-21 16:23:39,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1991 transitions. [2022-11-21 16:23:39,169 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1991 transitions. Word has length 6 [2022-11-21 16:23:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:39,169 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 1991 transitions. [2022-11-21 16:23:39,170 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) [2022-11-21 16:23:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1991 transitions. [2022-11-21 16:23:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-21 16:23:39,177 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:39,177 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-21 16:23:39,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 16:23:39,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-21 16:23:39,383 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:39,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash 669707413, now seen corresponding path program 1 times [2022-11-21 16:23:39,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:39,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710873504] [2022-11-21 16:23:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:39,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:23:39,402 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:23:39,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:23:39,433 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:23:39,433 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:23:39,433 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 16:23:39,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-21 16:23:39,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-21 16:23:39,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-21 16:23:39,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-21 16:23:39,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-21 16:23:39,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-21 16:23:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 16:23:39,435 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:23:39,435 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:23:39,435 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 16:23:39,467 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-21 16:23:39,471 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 16:23:39,475 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 156 places, 177 transitions, 384 flow [2022-11-21 16:23:39,476 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 156 places, 177 transitions, 384 flow [2022-11-21 16:23:39,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 156 places, 177 transitions, 384 flow [2022-11-21 16:23:39,545 INFO L130 PetriNetUnfolder]: 58/421 cut-off events. [2022-11-21 16:23:39,546 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-21 16:23:39,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 449 conditions, 421 events. 58/421 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1502 event pairs, 1 based on Foata normal form. 0/323 useless extension candidates. Maximal degree in co-relation 279. Up to 16 conditions per place. [2022-11-21 16:23:39,563 INFO L119 LiptonReduction]: Number of co-enabled transitions 14784 [2022-11-21 16:23:43,798 INFO L134 LiptonReduction]: Checked pairs total: 36794 [2022-11-21 16:23:43,798 INFO L136 LiptonReduction]: Total number of compositions: 145 [2022-11-21 16:23:43,799 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 64 places, 81 transitions, 192 flow [2022-11-21 16:23:45,293 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 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) [2022-11-21 16:23:45,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:23:45,298 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;@3efb6bdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:23:45,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:23:45,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 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) [2022-11-21 16:23:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:23:45,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:45,379 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:23:45,380 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:45,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:45,381 INFO L85 PathProgramCache]: Analyzing trace with hash 35530, now seen corresponding path program 1 times [2022-11-21 16:23:45,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:45,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939291158] [2022-11-21 16:23:45,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:45,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:45,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:45,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:45,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939291158] [2022-11-21 16:23:45,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939291158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:45,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:45,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:23:45,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033129962] [2022-11-21 16:23:45,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:45,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:45,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:45,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:45,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:45,642 INFO L87 Difference]: Start difference. First operand has 38466 states, 38421 states have (on average 5.138439915671118) internal successors, (197424), 38465 states have internal predecessors, (197424), 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) [2022-11-21 16:23:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:46,531 INFO L93 Difference]: Finished difference Result 34384 states and 124320 transitions. [2022-11-21 16:23:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:46,532 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 [2022-11-21 16:23:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:46,919 INFO L225 Difference]: With dead ends: 34384 [2022-11-21 16:23:46,919 INFO L226 Difference]: Without dead ends: 32187 [2022-11-21 16:23:46,920 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 [2022-11-21 16:23:46,921 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:46,922 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 25 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:23:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32187 states. [2022-11-21 16:23:48,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32187 to 32187. [2022-11-21 16:23:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32187 states, 32162 states have (on average 3.623717430508053) internal successors, (116546), 32186 states have internal predecessors, (116546), 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) [2022-11-21 16:23:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32187 states to 32187 states and 116546 transitions. [2022-11-21 16:23:48,662 INFO L78 Accepts]: Start accepts. Automaton has 32187 states and 116546 transitions. Word has length 2 [2022-11-21 16:23:48,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:48,662 INFO L495 AbstractCegarLoop]: Abstraction has 32187 states and 116546 transitions. [2022-11-21 16:23:48,662 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) [2022-11-21 16:23:48,663 INFO L276 IsEmpty]: Start isEmpty. Operand 32187 states and 116546 transitions. [2022-11-21 16:23:48,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:23:48,663 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:48,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:23:48,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 16:23:48,663 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:48,665 INFO L85 PathProgramCache]: Analyzing trace with hash 35531, now seen corresponding path program 1 times [2022-11-21 16:23:48,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:48,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188462527] [2022-11-21 16:23:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:48,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:48,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:48,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188462527] [2022-11-21 16:23:48,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188462527] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:23:48,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:23:48,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:23:48,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331019321] [2022-11-21 16:23:48,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:23:48,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:23:48,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:48,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:23:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:23:48,759 INFO L87 Difference]: Start difference. First operand 32187 states and 116546 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) [2022-11-21 16:23:49,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:49,226 INFO L93 Difference]: Finished difference Result 32180 states and 116537 transitions. [2022-11-21 16:23:49,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 16:23:49,227 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 [2022-11-21 16:23:49,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:49,690 INFO L225 Difference]: With dead ends: 32180 [2022-11-21 16:23:49,690 INFO L226 Difference]: Without dead ends: 32180 [2022-11-21 16:23:49,690 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 [2022-11-21 16:23:49,691 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 14 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:49,692 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-21 16:23:49,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32180 states. [2022-11-21 16:23:51,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32180 to 32180. [2022-11-21 16:23:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32180 states, 32157 states have (on average 3.624000995117704) internal successors, (116537), 32179 states have internal predecessors, (116537), 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) [2022-11-21 16:23:51,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32180 states to 32180 states and 116537 transitions. [2022-11-21 16:23:51,276 INFO L78 Accepts]: Start accepts. Automaton has 32180 states and 116537 transitions. Word has length 2 [2022-11-21 16:23:51,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:51,277 INFO L495 AbstractCegarLoop]: Abstraction has 32180 states and 116537 transitions. [2022-11-21 16:23:51,277 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) [2022-11-21 16:23:51,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32180 states and 116537 transitions. [2022-11-21 16:23:51,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-21 16:23:51,278 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:51,278 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-21 16:23:51,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 16:23:51,278 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:51,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:51,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1519392394, now seen corresponding path program 1 times [2022-11-21 16:23:51,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:51,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050821336] [2022-11-21 16:23:51,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:51,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:51,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:23:51,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050821336] [2022-11-21 16:23:51,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050821336] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 16:23:51,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051592683] [2022-11-21 16:23:51,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:51,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 16:23:51,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 16:23:51,364 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 16:23:51,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 16:23:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:23:51,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-21 16:23:51,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 16:23:51,669 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 [2022-11-21 16:23:51,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:51,748 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 16:23:51,802 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:23:51,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051592683] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 16:23:51,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 16:23:51,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-21 16:23:51,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286501018] [2022-11-21 16:23:51,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 16:23:51,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-21 16:23:51,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:23:51,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-21 16:23:51,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-21 16:23:51,804 INFO L87 Difference]: Start difference. First operand 32180 states and 116537 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) [2022-11-21 16:23:52,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-21 16:23:52,109 INFO L93 Difference]: Finished difference Result 9267 states and 32399 transitions. [2022-11-21 16:23:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-21 16:23:52,110 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 [2022-11-21 16:23:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-21 16:23:52,157 INFO L225 Difference]: With dead ends: 9267 [2022-11-21 16:23:52,157 INFO L226 Difference]: Without dead ends: 9267 [2022-11-21 16:23:52,157 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 [2022-11-21 16:23:52,158 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 299 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-21 16:23:52,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [299 Valid, 62 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-21 16:23:52,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9267 states. [2022-11-21 16:23:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9267 to 9267. [2022-11-21 16:23:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9267 states, 9266 states have (on average 3.496546514137708) internal successors, (32399), 9266 states have internal predecessors, (32399), 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) [2022-11-21 16:23:52,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9267 states to 9267 states and 32399 transitions. [2022-11-21 16:23:52,612 INFO L78 Accepts]: Start accepts. Automaton has 9267 states and 32399 transitions. Word has length 6 [2022-11-21 16:23:52,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-21 16:23:52,613 INFO L495 AbstractCegarLoop]: Abstraction has 9267 states and 32399 transitions. [2022-11-21 16:23:52,613 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) [2022-11-21 16:23:52,613 INFO L276 IsEmpty]: Start isEmpty. Operand 9267 states and 32399 transitions. [2022-11-21 16:23:52,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-21 16:23:52,615 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:23:52,616 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-21 16:23:52,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-21 16:23:52,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ab5b657-ab51-4145-a421-1fbec2406a01/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-21 16:23:52,822 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:23:52,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:23:52,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1136726885, now seen corresponding path program 1 times [2022-11-21 16:23:52,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:23:52,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612009415] [2022-11-21 16:23:52,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:23:52,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:23:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:23:52,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 16:23:52,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 16:23:52,862 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 16:23:52,862 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 16:23:52,863 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-11-21 16:23:52,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-11-21 16:23:52,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-11-21 16:23:52,863 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-11-21 16:23:52,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-11-21 16:23:52,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-11-21 16:23:52,864 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-11-21 16:23:52,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 16:23:52,865 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 16:23:52,865 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 16:23:52,865 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 16:23:52,893 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-21 16:23:52,897 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-21 16:23:52,897 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 207 transitions, 458 flow [2022-11-21 16:23:52,897 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 207 transitions, 458 flow [2022-11-21 16:23:52,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 207 transitions, 458 flow [2022-11-21 16:23:53,027 INFO L130 PetriNetUnfolder]: 91/659 cut-off events. [2022-11-21 16:23:53,027 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-21 16:23:53,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 714 conditions, 659 events. 91/659 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2746 event pairs, 6 based on Foata normal form. 0/505 useless extension candidates. Maximal degree in co-relation 441. Up to 32 conditions per place. [2022-11-21 16:23:53,060 INFO L119 LiptonReduction]: Number of co-enabled transitions 23184 [2022-11-21 16:23:57,485 INFO L134 LiptonReduction]: Checked pairs total: 57226 [2022-11-21 16:23:57,486 INFO L136 LiptonReduction]: Total number of compositions: 166 [2022-11-21 16:23:57,487 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 78 places, 100 transitions, 244 flow [2022-11-21 16:24:17,458 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 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) [2022-11-21 16:24:17,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 16:24:17,462 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;@3efb6bdf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 16:24:17,462 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 16:24:18,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 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) [2022-11-21 16:24:18,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2022-11-21 16:24:18,282 INFO L187 NwaCegarLoop]: Found error trace [2022-11-21 16:24:18,282 INFO L195 NwaCegarLoop]: trace histogram [1, 1] [2022-11-21 16:24:18,282 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-11-21 16:24:18,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 16:24:18,285 INFO L85 PathProgramCache]: Analyzing trace with hash 48428, now seen corresponding path program 1 times [2022-11-21 16:24:18,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 16:24:18,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366914277] [2022-11-21 16:24:18,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 16:24:18,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 16:24:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 16:24:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 16:24:18,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 16:24:18,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366914277] [2022-11-21 16:24:18,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366914277] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 16:24:18,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 16:24:18,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-21 16:24:18,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10419880] [2022-11-21 16:24:18,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 16:24:18,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 16:24:18,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 16:24:18,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 16:24:18,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 16:24:19,144 INFO L87 Difference]: Start difference. First operand has 479202 states, 479122 states have (on average 6.491284057087756) internal successors, (3110117), 479201 states have internal predecessors, (3110117), 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)