./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 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_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8 --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 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 --- 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-2329fc7 [2022-12-13 11:44:26,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 11:44:26,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 11:44:26,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 11:44:26,127 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 11:44:26,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 11:44:26,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 11:44:26,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 11:44:26,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 11:44:26,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 11:44:26,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 11:44:26,132 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 11:44:26,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 11:44:26,133 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 11:44:26,134 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 11:44:26,135 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 11:44:26,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 11:44:26,136 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 11:44:26,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 11:44:26,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 11:44:26,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 11:44:26,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 11:44:26,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 11:44:26,141 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 11:44:26,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 11:44:26,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 11:44:26,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 11:44:26,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 11:44:26,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 11:44:26,145 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 11:44:26,146 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 11:44:26,146 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 11:44:26,147 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 11:44:26,147 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 11:44:26,148 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 11:44:26,148 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 11:44:26,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 11:44:26,148 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 11:44:26,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 11:44:26,149 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 11:44:26,150 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 11:44:26,150 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 11:44:26,165 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 11:44:26,165 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 11:44:26,165 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 11:44:26,165 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 11:44:26,166 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 11:44:26,166 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 11:44:26,166 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 11:44:26,166 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 11:44:26,166 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 11:44:26,167 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 11:44:26,167 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 11:44:26,168 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 11:44:26,168 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 11:44:26,168 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 11:44:26,168 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 11:44:26,168 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 11:44:26,168 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 11:44:26,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 11:44:26,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:44:26,169 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 11:44:26,169 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3465c34fa1c26a5c7a3494350123ab41e5828c33cb08ac3f67b81737d460e559 [2022-12-13 11:44:26,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 11:44:26,380 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 11:44:26,383 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 11:44:26,384 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 11:44:26,384 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 11:44:26,385 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-12-13 11:44:29,074 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 11:44:29,237 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 11:44:29,237 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i [2022-12-13 11:44:29,245 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/data/51a1533ae/bf46ee6f12844712ba641d8ee323f5a9/FLAGa73a955cb [2022-12-13 11:44:29,255 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/data/51a1533ae/bf46ee6f12844712ba641d8ee323f5a9 [2022-12-13 11:44:29,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 11:44:29,258 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 11:44:29,259 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 11:44:29,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 11:44:29,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 11:44:29,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a406a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29, skipping insertion in model container [2022-12-13 11:44:29,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,269 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 11:44:29,292 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 11:44:29,486 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_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-12-13 11:44:29,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:44:29,513 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 11:44:29,537 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_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/sv-benchmarks/c/goblint-regression/28-race_reach_61-invariant_racing.i[30176,30189] [2022-12-13 11:44:29,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 11:44:29,567 INFO L208 MainTranslator]: Completed translation [2022-12-13 11:44:29,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29 WrapperNode [2022-12-13 11:44:29,568 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 11:44:29,569 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 11:44:29,569 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 11:44:29,569 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 11:44:29,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,585 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,601 INFO L138 Inliner]: procedures = 170, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-12-13 11:44:29,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 11:44:29,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 11:44:29,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 11:44:29,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 11:44:29,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,609 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,611 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,616 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,621 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,624 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 11:44:29,625 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 11:44:29,625 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 11:44:29,625 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 11:44:29,626 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (1/1) ... [2022-12-13 11:44:29,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 11:44:29,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:29,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 11:44:29,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 11:44:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 11:44:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 11:44:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 11:44:29,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 11:44:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 11:44:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 11:44:29,692 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 11:44:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 11:44:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 11:44:29,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 11:44:29,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 11:44:29,693 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 11:44:29,785 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 11:44:29,786 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 11:44:29,969 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 11:44:29,976 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 11:44:29,977 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-12-13 11:44:29,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:44:29 BoogieIcfgContainer [2022-12-13 11:44:29,978 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 11:44:29,980 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 11:44:29,980 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 11:44:29,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 11:44:29,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 11:44:29" (1/3) ... [2022-12-13 11:44:29,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2121cc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:44:29, skipping insertion in model container [2022-12-13 11:44:29,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 11:44:29" (2/3) ... [2022-12-13 11:44:29,984 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2121cc09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 11:44:29, skipping insertion in model container [2022-12-13 11:44:29,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 11:44:29" (3/3) ... [2022-12-13 11:44:29,985 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_61-invariant_racing.i [2022-12-13 11:44:29,999 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 11:44:29,999 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-13 11:44:29,999 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 11:44:30,053 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 11:44:30,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 138 transitions, 284 flow [2022-12-13 11:44:30,146 INFO L130 PetriNetUnfolder]: 30/203 cut-off events. [2022-12-13 11:44:30,146 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:44:30,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 203 events. 30/203 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 637 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-12-13 11:44:30,152 INFO L82 GeneralOperation]: Start removeDead. Operand has 122 places, 138 transitions, 284 flow [2022-12-13 11:44:30,157 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 138 transitions, 284 flow [2022-12-13 11:44:30,160 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:44:30,168 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 138 transitions, 284 flow [2022-12-13 11:44:30,170 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 138 transitions, 284 flow [2022-12-13 11:44:30,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 138 transitions, 284 flow [2022-12-13 11:44:30,207 INFO L130 PetriNetUnfolder]: 30/203 cut-off events. [2022-12-13 11:44:30,207 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:44:30,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209 conditions, 203 events. 30/203 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 637 event pairs, 0 based on Foata normal form. 0/158 useless extension candidates. Maximal degree in co-relation 101. Up to 6 conditions per place. [2022-12-13 11:44:30,212 INFO L119 LiptonReduction]: Number of co-enabled transitions 4402 [2022-12-13 11:44:32,246 INFO L134 LiptonReduction]: Checked pairs total: 12250 [2022-12-13 11:44:32,246 INFO L136 LiptonReduction]: Total number of compositions: 106 [2022-12-13 11:44:32,260 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:44:32,266 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=PETRI_NET, 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;@6cc486b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:44:32,266 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 11:44:32,268 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 11:44:32,269 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:44:32,269 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:32,269 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:44:32,270 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)] === [2022-12-13 11:44:32,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:32,274 INFO L85 PathProgramCache]: Analyzing trace with hash 16615, now seen corresponding path program 1 times [2022-12-13 11:44:32,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:32,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827669031] [2022-12-13 11:44:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:32,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:32,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:32,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:32,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827669031] [2022-12-13 11:44:32,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827669031] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:32,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:32,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:44:32,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733341355] [2022-12-13 11:44:32,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:32,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:32,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:32,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:32,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:32,514 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 110 out of 244 [2022-12-13 11:44:32,516 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 60 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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) [2022-12-13 11:44:32,516 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:32,516 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 110 of 244 [2022-12-13 11:44:32,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:32,624 INFO L130 PetriNetUnfolder]: 172/441 cut-off events. [2022-12-13 11:44:32,624 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:44:32,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 441 events. 172/441 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2017 event pairs, 135 based on Foata normal form. 75/425 useless extension candidates. Maximal degree in co-relation 764. Up to 328 conditions per place. [2022-12-13 11:44:32,626 INFO L137 encePairwiseOnDemand]: 224/244 looper letters, 38 selfloop transitions, 2 changer transitions 1/53 dead transitions. [2022-12-13 11:44:32,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 196 flow [2022-12-13 11:44:32,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:44:32,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:44:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 394 transitions. [2022-12-13 11:44:32,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5382513661202186 [2022-12-13 11:44:32,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 394 transitions. [2022-12-13 11:44:32,638 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 394 transitions. [2022-12-13 11:44:32,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:32,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 394 transitions. [2022-12-13 11:44:32,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 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) [2022-12-13 11:44:32,646 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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) [2022-12-13 11:44:32,646 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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) [2022-12-13 11:44:32,647 INFO L175 Difference]: Start difference. First operand has 46 places, 60 transitions, 128 flow. Second operand 3 states and 394 transitions. [2022-12-13 11:44:32,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 196 flow [2022-12-13 11:44:32,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 53 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:44:32,651 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 96 flow [2022-12-13 11:44:32,653 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 11:44:32,655 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2022-12-13 11:44:32,656 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 96 flow [2022-12-13 11:44:32,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 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) [2022-12-13 11:44:32,656 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:32,656 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:44:32,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 11:44:32,656 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)] === [2022-12-13 11:44:32,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:32,657 INFO L85 PathProgramCache]: Analyzing trace with hash 16614, now seen corresponding path program 1 times [2022-12-13 11:44:32,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:32,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768679364] [2022-12-13 11:44:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:32,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:32,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:32,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768679364] [2022-12-13 11:44:32,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768679364] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:32,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:32,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:44:32,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978131188] [2022-12-13 11:44:32,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:32,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:32,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:32,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:32,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:32,767 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 244 [2022-12-13 11:44:32,768 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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) [2022-12-13 11:44:32,768 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:32,768 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 244 [2022-12-13 11:44:32,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:32,844 INFO L130 PetriNetUnfolder]: 161/413 cut-off events. [2022-12-13 11:44:32,844 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 11:44:32,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 413 events. 161/413 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1910 event pairs, 0 based on Foata normal form. 0/352 useless extension candidates. Maximal degree in co-relation 735. Up to 326 conditions per place. [2022-12-13 11:44:32,846 INFO L137 encePairwiseOnDemand]: 240/244 looper letters, 39 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2022-12-13 11:44:32,846 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 53 transitions, 200 flow [2022-12-13 11:44:32,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:44:32,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:44:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 382 transitions. [2022-12-13 11:44:32,848 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5218579234972678 [2022-12-13 11:44:32,848 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 382 transitions. [2022-12-13 11:44:32,848 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 382 transitions. [2022-12-13 11:44:32,848 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:32,848 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 382 transitions. [2022-12-13 11:44:32,849 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 127.33333333333333) internal successors, (382), 3 states have internal predecessors, (382), 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) [2022-12-13 11:44:32,850 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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) [2022-12-13 11:44:32,851 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 244.0) internal successors, (976), 4 states have internal predecessors, (976), 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) [2022-12-13 11:44:32,851 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 96 flow. Second operand 3 states and 382 transitions. [2022-12-13 11:44:32,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 53 transitions, 200 flow [2022-12-13 11:44:32,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:44:32,852 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 102 flow [2022-12-13 11:44:32,852 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-12-13 11:44:32,853 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, 0 predicate places. [2022-12-13 11:44:32,853 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 102 flow [2022-12-13 11:44:32,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 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) [2022-12-13 11:44:32,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:32,853 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-12-13 11:44:32,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 11:44:32,853 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)] === [2022-12-13 11:44:32,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:32,854 INFO L85 PathProgramCache]: Analyzing trace with hash 495301072, now seen corresponding path program 1 times [2022-12-13 11:44:32,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:32,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249321678] [2022-12-13 11:44:32,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:32,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:32,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:32,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249321678] [2022-12-13 11:44:32,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249321678] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:44:32,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536370956] [2022-12-13 11:44:32,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:32,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:32,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:32,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:32,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 11:44:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:44:32,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:33,047 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 [2022-12-13 11:44:33,096 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:33,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:33,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536370956] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:33,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:44:33,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:44:33,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235137382] [2022-12-13 11:44:33,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:33,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:44:33,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:33,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:44:33,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:44:33,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 244 [2022-12-13 11:44:33,235 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 102 flow. Second operand has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 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) [2022-12-13 11:44:33,235 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:33,235 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 244 [2022-12-13 11:44:33,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:33,292 INFO L130 PetriNetUnfolder]: 21/68 cut-off events. [2022-12-13 11:44:33,292 INFO L131 PetriNetUnfolder]: For 9/9 co-relation queries the response was YES. [2022-12-13 11:44:33,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 68 events. 21/68 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 175 event pairs, 0 based on Foata normal form. 10/74 useless extension candidates. Maximal degree in co-relation 125. Up to 40 conditions per place. [2022-12-13 11:44:33,293 INFO L137 encePairwiseOnDemand]: 240/244 looper letters, 23 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2022-12-13 11:44:33,293 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 31 transitions, 123 flow [2022-12-13 11:44:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 11:44:33,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 11:44:33,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 463 transitions. [2022-12-13 11:44:33,295 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47438524590163933 [2022-12-13 11:44:33,295 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 463 transitions. [2022-12-13 11:44:33,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 463 transitions. [2022-12-13 11:44:33,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:33,296 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 463 transitions. [2022-12-13 11:44:33,297 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 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) [2022-12-13 11:44:33,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 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) [2022-12-13 11:44:33,300 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 244.0) internal successors, (1220), 5 states have internal predecessors, (1220), 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) [2022-12-13 11:44:33,300 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 102 flow. Second operand 4 states and 463 transitions. [2022-12-13 11:44:33,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 31 transitions, 123 flow [2022-12-13 11:44:33,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 31 transitions, 117 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-12-13 11:44:33,301 INFO L231 Difference]: Finished difference. Result has 25 places, 20 transitions, 49 flow [2022-12-13 11:44:33,301 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=244, PETRI_DIFFERENCE_MINUEND_FLOW=45, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=49, PETRI_PLACES=25, PETRI_TRANSITIONS=20} [2022-12-13 11:44:33,302 INFO L288 CegarLoopForPetriNet]: 46 programPoint places, -21 predicate places. [2022-12-13 11:44:33,302 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 20 transitions, 49 flow [2022-12-13 11:44:33,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 110.875) internal successors, (887), 8 states have internal predecessors, (887), 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) [2022-12-13 11:44:33,303 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:33,303 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 11:44:33,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 11:44:33,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-12-13 11:44:33,504 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)] === [2022-12-13 11:44:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1825535601, now seen corresponding path program 1 times [2022-12-13 11:44:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:33,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53173828] [2022-12-13 11:44:33,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:33,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:44:33,522 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:44:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:44:33,544 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:44:33,545 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:44:33,545 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 11:44:33,547 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 11:44:33,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 11:44:33,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 11:44:33,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 11:44:33,548 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 11:44:33,549 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 11:44:33,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 11:44:33,549 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 11:44:33,551 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:44:33,552 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 11:44:33,571 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 11:44:33,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 171 transitions, 360 flow [2022-12-13 11:44:33,596 INFO L130 PetriNetUnfolder]: 51/331 cut-off events. [2022-12-13 11:44:33,597 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:44:33,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 331 events. 51/331 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1189 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 205. Up to 9 conditions per place. [2022-12-13 11:44:33,598 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 171 transitions, 360 flow [2022-12-13 11:44:33,601 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 171 transitions, 360 flow [2022-12-13 11:44:33,601 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:44:33,601 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 171 transitions, 360 flow [2022-12-13 11:44:33,602 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 171 transitions, 360 flow [2022-12-13 11:44:33,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 171 transitions, 360 flow [2022-12-13 11:44:33,624 INFO L130 PetriNetUnfolder]: 51/331 cut-off events. [2022-12-13 11:44:33,624 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 11:44:33,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 345 conditions, 331 events. 51/331 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1189 event pairs, 0 based on Foata normal form. 0/255 useless extension candidates. Maximal degree in co-relation 205. Up to 9 conditions per place. [2022-12-13 11:44:33,630 INFO L119 LiptonReduction]: Number of co-enabled transitions 11408 [2022-12-13 11:44:35,680 INFO L134 LiptonReduction]: Checked pairs total: 34196 [2022-12-13 11:44:35,680 INFO L136 LiptonReduction]: Total number of compositions: 122 [2022-12-13 11:44:35,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:44:35,683 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=PETRI_NET, 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;@6cc486b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:44:35,683 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 11:44:35,685 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 11:44:35,685 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:44:35,685 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:35,685 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:44:35,685 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 11:44:35,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:35,686 INFO L85 PathProgramCache]: Analyzing trace with hash 27012, now seen corresponding path program 1 times [2022-12-13 11:44:35,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:35,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744172116] [2022-12-13 11:44:35,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:35,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:35,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:35,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744172116] [2022-12-13 11:44:35,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744172116] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:35,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:35,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:44:35,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716868859] [2022-12-13 11:44:35,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:35,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:35,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:35,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:35,751 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 293 [2022-12-13 11:44:35,752 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2022-12-13 11:44:35,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:35,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 293 [2022-12-13 11:44:35,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:36,149 INFO L130 PetriNetUnfolder]: 3368/5859 cut-off events. [2022-12-13 11:44:36,149 INFO L131 PetriNetUnfolder]: For 36/36 co-relation queries the response was YES. [2022-12-13 11:44:36,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11141 conditions, 5859 events. 3368/5859 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 39511 event pairs, 1431 based on Foata normal form. 1328/6209 useless extension candidates. Maximal degree in co-relation 1665. Up to 5205 conditions per place. [2022-12-13 11:44:36,171 INFO L137 encePairwiseOnDemand]: 268/293 looper letters, 51 selfloop transitions, 2 changer transitions 1/75 dead transitions. [2022-12-13 11:44:36,171 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 75 transitions, 276 flow [2022-12-13 11:44:36,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:44:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:44:36,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2022-12-13 11:44:36,174 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.565415244596132 [2022-12-13 11:44:36,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2022-12-13 11:44:36,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2022-12-13 11:44:36,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:36,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2022-12-13 11:44:36,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 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) [2022-12-13 11:44:36,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2022-12-13 11:44:36,178 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2022-12-13 11:44:36,178 INFO L175 Difference]: Start difference. First operand has 65 places, 85 transitions, 188 flow. Second operand 3 states and 497 transitions. [2022-12-13 11:44:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 75 transitions, 276 flow [2022-12-13 11:44:36,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 75 transitions, 276 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:44:36,179 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 158 flow [2022-12-13 11:44:36,180 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2022-12-13 11:44:36,180 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 3 predicate places. [2022-12-13 11:44:36,180 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 158 flow [2022-12-13 11:44:36,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 138.66666666666666) internal successors, (416), 3 states have internal predecessors, (416), 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) [2022-12-13 11:44:36,181 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:36,181 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:44:36,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 11:44:36,181 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 11:44:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:36,181 INFO L85 PathProgramCache]: Analyzing trace with hash 27010, now seen corresponding path program 1 times [2022-12-13 11:44:36,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:36,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490521425] [2022-12-13 11:44:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:36,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:36,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:36,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490521425] [2022-12-13 11:44:36,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490521425] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:36,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:36,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:44:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315754954] [2022-12-13 11:44:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:36,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:36,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:36,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 293 [2022-12-13 11:44:36,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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) [2022-12-13 11:44:36,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:36,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 293 [2022-12-13 11:44:36,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:36,607 INFO L130 PetriNetUnfolder]: 2844/4918 cut-off events. [2022-12-13 11:44:36,607 INFO L131 PetriNetUnfolder]: For 217/217 co-relation queries the response was YES. [2022-12-13 11:44:36,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9660 conditions, 4918 events. 2844/4918 cut-off events. For 217/217 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 32025 event pairs, 2348 based on Foata normal form. 0/4302 useless extension candidates. Maximal degree in co-relation 9589. Up to 4128 conditions per place. [2022-12-13 11:44:36,626 INFO L137 encePairwiseOnDemand]: 289/293 looper letters, 57 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2022-12-13 11:44:36,626 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 308 flow [2022-12-13 11:44:36,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:44:36,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:44:36,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2022-12-13 11:44:36,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5290102389078498 [2022-12-13 11:44:36,628 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2022-12-13 11:44:36,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2022-12-13 11:44:36,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:36,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2022-12-13 11:44:36,629 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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) [2022-12-13 11:44:36,630 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2022-12-13 11:44:36,630 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 293.0) internal successors, (1172), 4 states have internal predecessors, (1172), 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) [2022-12-13 11:44:36,630 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 158 flow. Second operand 3 states and 465 transitions. [2022-12-13 11:44:36,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 308 flow [2022-12-13 11:44:36,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 306 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:44:36,632 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 156 flow [2022-12-13 11:44:36,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2022-12-13 11:44:36,633 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, 1 predicate places. [2022-12-13 11:44:36,633 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 156 flow [2022-12-13 11:44:36,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.66666666666666) internal successors, (407), 3 states have internal predecessors, (407), 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) [2022-12-13 11:44:36,633 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:36,633 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:44:36,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 11:44:36,633 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)] === [2022-12-13 11:44:36,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash -803460803, now seen corresponding path program 1 times [2022-12-13 11:44:36,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:36,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196498569] [2022-12-13 11:44:36,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:36,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:36,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:36,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:36,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196498569] [2022-12-13 11:44:36,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196498569] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:44:36,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313962771] [2022-12-13 11:44:36,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:36,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:36,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:36,696 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:36,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 11:44:36,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:36,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:44:36,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:36,768 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 [2022-12-13 11:44:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:36,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:36,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:36,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313962771] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:36,850 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:44:36,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:44:36,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953774875] [2022-12-13 11:44:36,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:36,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:44:36,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:36,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:44:36,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:44:36,953 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 293 [2022-12-13 11:44:36,954 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 156 flow. Second operand has 8 states, 8 states have (on average 135.875) internal successors, (1087), 8 states have internal predecessors, (1087), 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) [2022-12-13 11:44:36,954 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:36,955 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 293 [2022-12-13 11:44:36,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:37,120 INFO L130 PetriNetUnfolder]: 425/817 cut-off events. [2022-12-13 11:44:37,120 INFO L131 PetriNetUnfolder]: For 185/185 co-relation queries the response was YES. [2022-12-13 11:44:37,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1790 conditions, 817 events. 425/817 cut-off events. For 185/185 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 4255 event pairs, 55 based on Foata normal form. 88/865 useless extension candidates. Maximal degree in co-relation 1780. Up to 480 conditions per place. [2022-12-13 11:44:37,131 INFO L137 encePairwiseOnDemand]: 289/293 looper letters, 49 selfloop transitions, 3 changer transitions 0/66 dead transitions. [2022-12-13 11:44:37,131 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 256 flow [2022-12-13 11:44:37,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 11:44:37,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 11:44:37,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 726 transitions. [2022-12-13 11:44:37,133 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4955631399317406 [2022-12-13 11:44:37,133 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 726 transitions. [2022-12-13 11:44:37,133 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 726 transitions. [2022-12-13 11:44:37,133 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:37,133 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 726 transitions. [2022-12-13 11:44:37,134 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 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) [2022-12-13 11:44:37,136 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 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) [2022-12-13 11:44:37,136 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 293.0) internal successors, (1758), 6 states have internal predecessors, (1758), 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) [2022-12-13 11:44:37,136 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 156 flow. Second operand 5 states and 726 transitions. [2022-12-13 11:44:37,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 256 flow [2022-12-13 11:44:37,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 253 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 11:44:37,138 INFO L231 Difference]: Finished difference. Result has 47 places, 38 transitions, 99 flow [2022-12-13 11:44:37,138 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=293, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=99, PETRI_PLACES=47, PETRI_TRANSITIONS=38} [2022-12-13 11:44:37,138 INFO L288 CegarLoopForPetriNet]: 65 programPoint places, -18 predicate places. [2022-12-13 11:44:37,138 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 38 transitions, 99 flow [2022-12-13 11:44:37,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 135.875) internal successors, (1087), 8 states have internal predecessors, (1087), 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) [2022-12-13 11:44:37,139 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:37,139 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 11:44:37,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 11:44:37,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 11:44:37,340 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)] === [2022-12-13 11:44:37,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:37,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1703625822, now seen corresponding path program 1 times [2022-12-13 11:44:37,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:37,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272971518] [2022-12-13 11:44:37,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:37,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:37,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:44:37,353 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:44:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:44:37,367 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:44:37,368 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:44:37,368 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 11:44:37,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 11:44:37,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 11:44:37,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 11:44:37,368 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 11:44:37,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 11:44:37,369 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 11:44:37,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 11:44:37,369 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 11:44:37,370 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:44:37,370 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 11:44:37,388 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 11:44:37,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 204 transitions, 438 flow [2022-12-13 11:44:37,434 INFO L130 PetriNetUnfolder]: 77/502 cut-off events. [2022-12-13 11:44:37,435 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 11:44:37,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 502 events. 77/502 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1984 event pairs, 1 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2022-12-13 11:44:37,436 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 204 transitions, 438 flow [2022-12-13 11:44:37,439 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 176 places, 204 transitions, 438 flow [2022-12-13 11:44:37,439 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:44:37,439 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 176 places, 204 transitions, 438 flow [2022-12-13 11:44:37,439 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 176 places, 204 transitions, 438 flow [2022-12-13 11:44:37,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 204 transitions, 438 flow [2022-12-13 11:44:37,480 INFO L130 PetriNetUnfolder]: 77/502 cut-off events. [2022-12-13 11:44:37,480 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 11:44:37,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 502 events. 77/502 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1984 event pairs, 1 based on Foata normal form. 0/385 useless extension candidates. Maximal degree in co-relation 339. Up to 16 conditions per place. [2022-12-13 11:44:37,492 INFO L119 LiptonReduction]: Number of co-enabled transitions 20274 [2022-12-13 11:44:39,429 INFO L134 LiptonReduction]: Checked pairs total: 74204 [2022-12-13 11:44:39,429 INFO L136 LiptonReduction]: Total number of compositions: 137 [2022-12-13 11:44:39,431 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:44:39,432 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=PETRI_NET, 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;@6cc486b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:44:39,432 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 11:44:39,433 INFO L130 PetriNetUnfolder]: 0/3 cut-off events. [2022-12-13 11:44:39,433 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:44:39,433 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:39,433 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:44:39,434 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)] === [2022-12-13 11:44:39,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 39017, now seen corresponding path program 1 times [2022-12-13 11:44:39,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:39,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961425071] [2022-12-13 11:44:39,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:39,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:39,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:39,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:39,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:39,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961425071] [2022-12-13 11:44:39,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961425071] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:39,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:39,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:44:39,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628366070] [2022-12-13 11:44:39,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:39,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:39,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:39,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:39,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:39,472 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 341 [2022-12-13 11:44:39,472 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 108 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2022-12-13 11:44:39,472 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:39,472 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 341 [2022-12-13 11:44:39,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:42,761 INFO L130 PetriNetUnfolder]: 35043/52339 cut-off events. [2022-12-13 11:44:42,761 INFO L131 PetriNetUnfolder]: For 867/867 co-relation queries the response was YES. [2022-12-13 11:44:42,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100740 conditions, 52339 events. 35043/52339 cut-off events. For 867/867 co-relation queries the response was YES. Maximal size of possible extension queue 1485. Compared 399136 event pairs, 26853 based on Foata normal form. 9672/56254 useless extension candidates. Maximal degree in co-relation 15989. Up to 41805 conditions per place. [2022-12-13 11:44:42,981 INFO L137 encePairwiseOnDemand]: 309/341 looper letters, 72 selfloop transitions, 2 changer transitions 1/104 dead transitions. [2022-12-13 11:44:42,981 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 104 transitions, 388 flow [2022-12-13 11:44:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:44:42,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:44:42,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 602 transitions. [2022-12-13 11:44:42,984 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5884652981427175 [2022-12-13 11:44:42,984 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 602 transitions. [2022-12-13 11:44:42,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 602 transitions. [2022-12-13 11:44:42,985 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:42,985 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 602 transitions. [2022-12-13 11:44:42,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 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) [2022-12-13 11:44:42,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-12-13 11:44:42,991 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-12-13 11:44:42,991 INFO L175 Difference]: Start difference. First operand has 82 places, 108 transitions, 246 flow. Second operand 3 states and 602 transitions. [2022-12-13 11:44:42,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 104 transitions, 388 flow [2022-12-13 11:44:42,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 388 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:44:42,995 INFO L231 Difference]: Finished difference. Result has 82 places, 78 transitions, 190 flow [2022-12-13 11:44:42,996 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=82, PETRI_TRANSITIONS=78} [2022-12-13 11:44:42,996 INFO L288 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2022-12-13 11:44:42,997 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 78 transitions, 190 flow [2022-12-13 11:44:42,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 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) [2022-12-13 11:44:42,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:42,997 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:44:42,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:44:42,998 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)] === [2022-12-13 11:44:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash 39018, now seen corresponding path program 1 times [2022-12-13 11:44:42,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592545525] [2022-12-13 11:44:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:42,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:43,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:43,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592545525] [2022-12-13 11:44:43,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592545525] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:43,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:43,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:44:43,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247163599] [2022-12-13 11:44:43,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:43,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:43,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:43,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:43,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:43,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 163 out of 341 [2022-12-13 11:44:43,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 78 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 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) [2022-12-13 11:44:43,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:43,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 163 of 341 [2022-12-13 11:44:43,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:46,160 INFO L130 PetriNetUnfolder]: 32873/48778 cut-off events. [2022-12-13 11:44:46,160 INFO L131 PetriNetUnfolder]: For 1049/1049 co-relation queries the response was YES. [2022-12-13 11:44:46,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95001 conditions, 48778 events. 32873/48778 cut-off events. For 1049/1049 co-relation queries the response was YES. Maximal size of possible extension queue 1358. Compared 364747 event pairs, 25896 based on Foata normal form. 0/45051 useless extension candidates. Maximal degree in co-relation 88224. Up to 44763 conditions per place. [2022-12-13 11:44:46,355 INFO L137 encePairwiseOnDemand]: 337/341 looper letters, 57 selfloop transitions, 2 changer transitions 0/88 dead transitions. [2022-12-13 11:44:46,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 88 transitions, 328 flow [2022-12-13 11:44:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:44:46,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:44:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 550 transitions. [2022-12-13 11:44:46,357 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5376344086021505 [2022-12-13 11:44:46,357 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 550 transitions. [2022-12-13 11:44:46,357 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 550 transitions. [2022-12-13 11:44:46,358 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:46,358 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 550 transitions. [2022-12-13 11:44:46,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 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) [2022-12-13 11:44:46,360 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-12-13 11:44:46,360 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 341.0) internal successors, (1364), 4 states have internal predecessors, (1364), 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) [2022-12-13 11:44:46,360 INFO L175 Difference]: Start difference. First operand has 82 places, 78 transitions, 190 flow. Second operand 3 states and 550 transitions. [2022-12-13 11:44:46,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 88 transitions, 328 flow [2022-12-13 11:44:46,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 88 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:44:46,488 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 200 flow [2022-12-13 11:44:46,488 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2022-12-13 11:44:46,489 INFO L288 CegarLoopForPetriNet]: 82 programPoint places, 0 predicate places. [2022-12-13 11:44:46,489 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 200 flow [2022-12-13 11:44:46,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 163.66666666666666) internal successors, (491), 3 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) [2022-12-13 11:44:46,489 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:46,489 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:44:46,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 11:44:46,489 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)] === [2022-12-13 11:44:46,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:46,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1704434548, now seen corresponding path program 1 times [2022-12-13 11:44:46,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:46,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846179308] [2022-12-13 11:44:46,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:46,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:46,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:46,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846179308] [2022-12-13 11:44:46,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846179308] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:44:46,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284211564] [2022-12-13 11:44:46,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:46,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:46,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:44:46,540 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:44:46,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:44:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:46,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:44:46,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:44:46,595 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 [2022-12-13 11:44:46,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:46,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:44:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:46,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284211564] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:44:46,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:44:46,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:44:46,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714124907] [2022-12-13 11:44:46,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:44:46,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:44:46,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:46,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:44:46,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:44:46,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 341 [2022-12-13 11:44:46,741 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 200 flow. Second operand has 8 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 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) [2022-12-13 11:44:46,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:46,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 341 [2022-12-13 11:44:46,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:44:47,506 INFO L130 PetriNetUnfolder]: 5017/7982 cut-off events. [2022-12-13 11:44:47,506 INFO L131 PetriNetUnfolder]: For 2201/2201 co-relation queries the response was YES. [2022-12-13 11:44:47,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16851 conditions, 7982 events. 5017/7982 cut-off events. For 2201/2201 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 52922 event pairs, 429 based on Foata normal form. 648/8416 useless extension candidates. Maximal degree in co-relation 13069. Up to 4608 conditions per place. [2022-12-13 11:44:47,529 INFO L137 encePairwiseOnDemand]: 337/341 looper letters, 81 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2022-12-13 11:44:47,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 107 transitions, 415 flow [2022-12-13 11:44:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:44:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:44:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1045 transitions. [2022-12-13 11:44:47,531 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2022-12-13 11:44:47,531 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1045 transitions. [2022-12-13 11:44:47,531 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1045 transitions. [2022-12-13 11:44:47,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:44:47,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1045 transitions. [2022-12-13 11:44:47,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 174.16666666666666) internal successors, (1045), 6 states have internal predecessors, (1045), 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) [2022-12-13 11:44:47,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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) [2022-12-13 11:44:47,535 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 341.0) internal successors, (2387), 7 states have internal predecessors, (2387), 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) [2022-12-13 11:44:47,535 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 200 flow. Second operand 6 states and 1045 transitions. [2022-12-13 11:44:47,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 107 transitions, 415 flow [2022-12-13 11:44:47,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 407 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 11:44:47,539 INFO L231 Difference]: Finished difference. Result has 64 places, 55 transitions, 141 flow [2022-12-13 11:44:47,539 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=341, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=141, PETRI_PLACES=64, PETRI_TRANSITIONS=55} [2022-12-13 11:44:47,539 INFO L288 CegarLoopForPetriNet]: 82 programPoint places, -18 predicate places. [2022-12-13 11:44:47,539 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 55 transitions, 141 flow [2022-12-13 11:44:47,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 160.875) internal successors, (1287), 8 states have internal predecessors, (1287), 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) [2022-12-13 11:44:47,540 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:47,540 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 11:44:47,545 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:44:47,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:44:47,740 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)] === [2022-12-13 11:44:47,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:47,741 INFO L85 PathProgramCache]: Analyzing trace with hash -308637612, now seen corresponding path program 1 times [2022-12-13 11:44:47,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:47,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730232470] [2022-12-13 11:44:47,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:47,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:47,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:44:47,750 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:44:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:44:47,758 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:44:47,759 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:44:47,759 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 11:44:47,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 11:44:47,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 11:44:47,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 11:44:47,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 11:44:47,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 11:44:47,759 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 11:44:47,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 11:44:47,759 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-12-13 11:44:47,760 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:44:47,760 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 11:44:47,772 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 11:44:47,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 237 transitions, 518 flow [2022-12-13 11:44:47,835 INFO L130 PetriNetUnfolder]: 115/761 cut-off events. [2022-12-13 11:44:47,835 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 11:44:47,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 761 events. 115/761 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3426 event pairs, 6 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2022-12-13 11:44:47,839 INFO L82 GeneralOperation]: Start removeDead. Operand has 203 places, 237 transitions, 518 flow [2022-12-13 11:44:47,842 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 203 places, 237 transitions, 518 flow [2022-12-13 11:44:47,842 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:44:47,842 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 203 places, 237 transitions, 518 flow [2022-12-13 11:44:47,842 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 203 places, 237 transitions, 518 flow [2022-12-13 11:44:47,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 203 places, 237 transitions, 518 flow [2022-12-13 11:44:47,903 INFO L130 PetriNetUnfolder]: 115/761 cut-off events. [2022-12-13 11:44:47,903 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 11:44:47,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 816 conditions, 761 events. 115/761 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3426 event pairs, 6 based on Foata normal form. 0/583 useless extension candidates. Maximal degree in co-relation 522. Up to 32 conditions per place. [2022-12-13 11:44:47,922 INFO L119 LiptonReduction]: Number of co-enabled transitions 31248 [2022-12-13 11:44:49,941 INFO L134 LiptonReduction]: Checked pairs total: 107270 [2022-12-13 11:44:49,941 INFO L136 LiptonReduction]: Total number of compositions: 155 [2022-12-13 11:44:49,942 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:44:49,942 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=PETRI_NET, 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;@6cc486b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:44:49,942 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 11:44:49,943 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 11:44:49,943 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:44:49,943 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:44:49,943 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:44:49,943 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)] === [2022-12-13 11:44:49,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:44:49,943 INFO L85 PathProgramCache]: Analyzing trace with hash 52621, now seen corresponding path program 1 times [2022-12-13 11:44:49,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:44:49,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44482352] [2022-12-13 11:44:49,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:44:49,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:44:49,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:44:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:44:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:44:49,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44482352] [2022-12-13 11:44:49,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44482352] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:44:49,958 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:44:49,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:44:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188072005] [2022-12-13 11:44:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:44:49,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:44:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:44:49,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:44:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:44:49,979 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 392 [2022-12-13 11:44:49,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 131 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2022-12-13 11:44:49,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:44:49,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 392 [2022-12-13 11:44:49,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:45:57,793 INFO L130 PetriNetUnfolder]: 808189/1093098 cut-off events. [2022-12-13 11:45:57,793 INFO L131 PetriNetUnfolder]: For 21254/21254 co-relation queries the response was YES. [2022-12-13 11:45:59,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2126842 conditions, 1093098 events. 808189/1093098 cut-off events. For 21254/21254 co-relation queries the response was YES. Maximal size of possible extension queue 23104. Compared 9038074 event pairs, 637188 based on Foata normal form. 159595/1114347 useless extension candidates. Maximal degree in co-relation 205626. Up to 902285 conditions per place. [2022-12-13 11:46:03,375 INFO L137 encePairwiseOnDemand]: 354/392 looper letters, 104 selfloop transitions, 2 changer transitions 1/135 dead transitions. [2022-12-13 11:46:03,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 135 transitions, 528 flow [2022-12-13 11:46:03,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:46:03,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:46:03,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 721 transitions. [2022-12-13 11:46:03,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2022-12-13 11:46:03,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 721 transitions. [2022-12-13 11:46:03,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 721 transitions. [2022-12-13 11:46:03,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:46:03,379 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 721 transitions. [2022-12-13 11:46:03,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.33333333333334) internal successors, (721), 3 states have internal predecessors, (721), 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) [2022-12-13 11:46:03,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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) [2022-12-13 11:46:03,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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) [2022-12-13 11:46:03,382 INFO L175 Difference]: Start difference. First operand has 99 places, 131 transitions, 306 flow. Second operand 3 states and 721 transitions. [2022-12-13 11:46:03,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 135 transitions, 528 flow [2022-12-13 11:46:03,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 135 transitions, 528 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:46:03,386 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 238 flow [2022-12-13 11:46:03,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=238, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2022-12-13 11:46:03,387 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-12-13 11:46:03,387 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 238 flow [2022-12-13 11:46:03,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 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) [2022-12-13 11:46:03,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:46:03,387 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:46:03,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 11:46:03,388 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)] === [2022-12-13 11:46:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:46:03,388 INFO L85 PathProgramCache]: Analyzing trace with hash 52619, now seen corresponding path program 1 times [2022-12-13 11:46:03,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:46:03,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330314694] [2022-12-13 11:46:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:46:03,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:46:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:46:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:46:03,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:46:03,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330314694] [2022-12-13 11:46:03,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330314694] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:46:03,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:46:03,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:46:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310373081] [2022-12-13 11:46:03,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:46:03,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:46:03,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:46:03,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:46:03,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:46:03,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 392 [2022-12-13 11:46:03,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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) [2022-12-13 11:46:03,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:46:03,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 392 [2022-12-13 11:46:03,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:47:07,141 INFO L130 PetriNetUnfolder]: 760833/1025084 cut-off events. [2022-12-13 11:47:07,141 INFO L131 PetriNetUnfolder]: For 24092/24092 co-relation queries the response was YES. [2022-12-13 11:47:09,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2011462 conditions, 1025084 events. 760833/1025084 cut-off events. For 24092/24092 co-relation queries the response was YES. Maximal size of possible extension queue 21485. Compared 8296438 event pairs, 630973 based on Foata normal form. 0/917530 useless extension candidates. Maximal degree in co-relation 1876738. Up to 962685 conditions per place. [2022-12-13 11:47:12,662 INFO L137 encePairwiseOnDemand]: 388/392 looper letters, 75 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2022-12-13 11:47:12,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 105 transitions, 412 flow [2022-12-13 11:47:12,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:47:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:47:12,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 643 transitions. [2022-12-13 11:47:12,667 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5467687074829932 [2022-12-13 11:47:12,667 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 643 transitions. [2022-12-13 11:47:12,667 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 643 transitions. [2022-12-13 11:47:12,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:47:12,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 643 transitions. [2022-12-13 11:47:12,671 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 214.33333333333334) internal successors, (643), 3 states have internal predecessors, (643), 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) [2022-12-13 11:47:12,675 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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) [2022-12-13 11:47:12,676 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 392.0) internal successors, (1568), 4 states have internal predecessors, (1568), 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) [2022-12-13 11:47:12,676 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 238 flow. Second operand 3 states and 643 transitions. [2022-12-13 11:47:12,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 105 transitions, 412 flow [2022-12-13 11:47:40,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 11:47:40,304 INFO L231 Difference]: Finished difference. Result has 99 places, 96 transitions, 248 flow [2022-12-13 11:47:40,304 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=248, PETRI_PLACES=99, PETRI_TRANSITIONS=96} [2022-12-13 11:47:40,304 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-12-13 11:47:40,305 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 96 transitions, 248 flow [2022-12-13 11:47:40,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 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) [2022-12-13 11:47:40,305 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:47:40,305 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-12-13 11:47:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 11:47:40,305 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)] === [2022-12-13 11:47:40,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:47:40,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1395551334, now seen corresponding path program 1 times [2022-12-13 11:47:40,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:47:40,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007811206] [2022-12-13 11:47:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:40,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:47:40,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:40,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:47:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007811206] [2022-12-13 11:47:40,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007811206] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:47:40,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853723202] [2022-12-13 11:47:40,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:47:40,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:47:40,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:47:40,350 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:47:40,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 11:47:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:47:40,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 11:47:40,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:47:40,415 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 [2022-12-13 11:47:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:40,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:47:40,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:47:40,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853723202] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:47:40,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:47:40,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-12-13 11:47:40,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208269455] [2022-12-13 11:47:40,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:47:40,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 11:47:40,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:47:40,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 11:47:40,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 11:47:40,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 392 [2022-12-13 11:47:40,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 96 transitions, 248 flow. Second operand has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 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) [2022-12-13 11:47:40,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:47:40,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 392 [2022-12-13 11:47:40,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:48:45,186 INFO L130 PetriNetUnfolder]: 768452/1025046 cut-off events. [2022-12-13 11:48:45,186 INFO L131 PetriNetUnfolder]: For 24803/24803 co-relation queries the response was YES. [2022-12-13 11:48:46,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2039243 conditions, 1025046 events. 768452/1025046 cut-off events. For 24803/24803 co-relation queries the response was YES. Maximal size of possible extension queue 21926. Compared 8155702 event pairs, 8735 based on Foata normal form. 8/920107 useless extension candidates. Maximal degree in co-relation 1532286. Up to 831953 conditions per place. [2022-12-13 11:48:50,430 INFO L137 encePairwiseOnDemand]: 386/392 looper letters, 196 selfloop transitions, 8 changer transitions 0/232 dead transitions. [2022-12-13 11:48:50,430 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 232 transitions, 951 flow [2022-12-13 11:48:50,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:48:50,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:48:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1318 transitions. [2022-12-13 11:48:50,433 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.560374149659864 [2022-12-13 11:48:50,433 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1318 transitions. [2022-12-13 11:48:50,433 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1318 transitions. [2022-12-13 11:48:50,434 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:48:50,434 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1318 transitions. [2022-12-13 11:48:50,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 219.66666666666666) internal successors, (1318), 6 states have internal predecessors, (1318), 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) [2022-12-13 11:48:50,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 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) [2022-12-13 11:48:50,439 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 392.0) internal successors, (2744), 7 states have internal predecessors, (2744), 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) [2022-12-13 11:48:50,439 INFO L175 Difference]: Start difference. First operand has 99 places, 96 transitions, 248 flow. Second operand 6 states and 1318 transitions. [2022-12-13 11:48:50,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 232 transitions, 951 flow [2022-12-13 11:48:50,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 232 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 11:48:50,443 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 302 flow [2022-12-13 11:48:50,443 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2022-12-13 11:48:50,443 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 8 predicate places. [2022-12-13 11:48:50,444 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 302 flow [2022-12-13 11:48:50,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 186.875) internal successors, (1495), 8 states have internal predecessors, (1495), 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) [2022-12-13 11:48:50,444 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:48:50,444 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:48:50,450 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-12-13 11:48:50,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:48:50,646 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 11:48:50,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:48:50,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1495120847, now seen corresponding path program 1 times [2022-12-13 11:48:50,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:48:50,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834536738] [2022-12-13 11:48:50,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:48:50,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:48:50,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:48:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:50,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:48:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834536738] [2022-12-13 11:48:50,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834536738] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:48:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222856951] [2022-12-13 11:48:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:48:50,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:48:50,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:48:50,787 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:48:50,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 11:48:50,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:48:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 15 conjunts are in the unsatisfiable core [2022-12-13 11:48:50,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:48:50,861 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 [2022-12-13 11:48:50,962 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:50,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:48:51,053 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:48:51,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222856951] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:48:51,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:48:51,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-12-13 11:48:51,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314101306] [2022-12-13 11:48:51,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:48:51,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-12-13 11:48:51,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:48:51,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-12-13 11:48:51,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2022-12-13 11:48:51,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 392 [2022-12-13 11:48:51,321 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 302 flow. Second operand has 17 states, 17 states have (on average 187.47058823529412) internal successors, (3187), 17 states have internal predecessors, (3187), 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) [2022-12-13 11:48:51,321 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:48:51,321 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 392 [2022-12-13 11:48:51,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:49:00,784 INFO L130 PetriNetUnfolder]: 104505/144271 cut-off events. [2022-12-13 11:49:00,784 INFO L131 PetriNetUnfolder]: For 174227/174227 co-relation queries the response was YES. [2022-12-13 11:49:01,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347987 conditions, 144271 events. 104505/144271 cut-off events. For 174227/174227 co-relation queries the response was YES. Maximal size of possible extension queue 4048. Compared 1044288 event pairs, 9655 based on Foata normal form. 18480/153674 useless extension candidates. Maximal degree in co-relation 36229. Up to 88000 conditions per place. [2022-12-13 11:49:01,531 INFO L137 encePairwiseOnDemand]: 388/392 looper letters, 141 selfloop transitions, 5 changer transitions 0/169 dead transitions. [2022-12-13 11:49:01,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 169 transitions, 702 flow [2022-12-13 11:49:01,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 11:49:01,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-12-13 11:49:01,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1445 transitions. [2022-12-13 11:49:01,535 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5266034985422741 [2022-12-13 11:49:01,535 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1445 transitions. [2022-12-13 11:49:01,535 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1445 transitions. [2022-12-13 11:49:01,536 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:49:01,536 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1445 transitions. [2022-12-13 11:49:01,538 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 206.42857142857142) internal successors, (1445), 7 states have internal predecessors, (1445), 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) [2022-12-13 11:49:01,541 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 392.0) internal successors, (3136), 8 states have internal predecessors, (3136), 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) [2022-12-13 11:49:01,541 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 392.0) internal successors, (3136), 8 states have internal predecessors, (3136), 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) [2022-12-13 11:49:01,541 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 302 flow. Second operand 7 states and 1445 transitions. [2022-12-13 11:49:01,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 169 transitions, 702 flow [2022-12-13 11:49:01,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 169 transitions, 673 flow, removed 9 selfloop flow, removed 5 redundant places. [2022-12-13 11:49:01,606 INFO L231 Difference]: Finished difference. Result has 86 places, 73 transitions, 193 flow [2022-12-13 11:49:01,606 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=392, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=193, PETRI_PLACES=86, PETRI_TRANSITIONS=73} [2022-12-13 11:49:01,607 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -13 predicate places. [2022-12-13 11:49:01,607 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 73 transitions, 193 flow [2022-12-13 11:49:01,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 187.47058823529412) internal successors, (3187), 17 states have internal predecessors, (3187), 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) [2022-12-13 11:49:01,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:01,608 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:49:01,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 11:49:01,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_545ca2b3-bdfb-45a3-9b84-4ad9590a947a/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:49:01,809 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 11:49:01,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash 895895482, now seen corresponding path program 1 times [2022-12-13 11:49:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:01,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407202769] [2022-12-13 11:49:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:01,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:01,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:49:01,845 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:49:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:49:01,861 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:49:01,862 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:49:01,862 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 11:49:01,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2022-12-13 11:49:01,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2022-12-13 11:49:01,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2022-12-13 11:49:01,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2022-12-13 11:49:01,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2022-12-13 11:49:01,862 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2022-12-13 11:49:01,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-12-13 11:49:01,863 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-12-13 11:49:01,863 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:49:01,863 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 11:49:01,885 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 11:49:01,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 270 transitions, 600 flow [2022-12-13 11:49:02,024 INFO L130 PetriNetUnfolder]: 181/1200 cut-off events. [2022-12-13 11:49:02,024 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 11:49:02,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 1200 events. 181/1200 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6231 event pairs, 23 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 806. Up to 80 conditions per place. [2022-12-13 11:49:02,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 230 places, 270 transitions, 600 flow [2022-12-13 11:49:02,041 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 230 places, 270 transitions, 600 flow [2022-12-13 11:49:02,041 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:49:02,041 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 230 places, 270 transitions, 600 flow [2022-12-13 11:49:02,041 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 230 places, 270 transitions, 600 flow [2022-12-13 11:49:02,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 230 places, 270 transitions, 600 flow [2022-12-13 11:49:02,164 INFO L130 PetriNetUnfolder]: 181/1200 cut-off events. [2022-12-13 11:49:02,164 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 11:49:02,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1311 conditions, 1200 events. 181/1200 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 6231 event pairs, 23 based on Foata normal form. 0/921 useless extension candidates. Maximal degree in co-relation 806. Up to 80 conditions per place. [2022-12-13 11:49:02,206 INFO L119 LiptonReduction]: Number of co-enabled transitions 44330 [2022-12-13 11:49:04,788 INFO L134 LiptonReduction]: Checked pairs total: 157020 [2022-12-13 11:49:04,788 INFO L136 LiptonReduction]: Total number of compositions: 172 [2022-12-13 11:49:04,789 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:49:04,789 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=PETRI_NET, 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;@6cc486b1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:49:04,789 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 11:49:04,790 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-12-13 11:49:04,790 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:49:04,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:49:04,790 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-12-13 11:49:04,790 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2022-12-13 11:49:04,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:49:04,790 INFO L85 PathProgramCache]: Analyzing trace with hash 67812, now seen corresponding path program 1 times [2022-12-13 11:49:04,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:49:04,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549032754] [2022-12-13 11:49:04,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:49:04,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:49:04,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:49:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:49:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:49:04,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549032754] [2022-12-13 11:49:04,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549032754] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:49:04,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:49:04,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 11:49:04,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822747342] [2022-12-13 11:49:04,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:49:04,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:49:04,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:49:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:49:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:49:04,839 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 442 [2022-12-13 11:49:04,840 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 368 flow. Second operand has 3 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 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) [2022-12-13 11:49:04,840 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:49:04,840 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 442 [2022-12-13 11:49:04,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand