./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a 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_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R --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 dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- 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-38b53e6 [2022-11-25 18:28:51,381 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:28:51,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:28:51,402 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:28:51,403 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:28:51,404 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:28:51,405 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:28:51,407 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:28:51,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:28:51,409 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:28:51,410 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:28:51,411 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:28:51,412 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:28:51,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:28:51,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:28:51,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:28:51,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:28:51,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:28:51,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:28:51,423 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:28:51,425 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:28:51,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:28:51,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:28:51,433 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:28:51,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:28:51,437 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:28:51,437 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:28:51,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:28:51,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:28:51,439 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:28:51,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:28:51,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:28:51,441 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:28:51,442 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:28:51,452 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:28:51,454 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:28:51,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:28:51,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:28:51,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:28:51,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:28:51,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:28:51,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:28:51,499 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:28:51,499 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:28:51,500 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:28:51,500 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:28:51,501 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:28:51,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:28:51,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:28:51,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:28:51,502 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:28:51,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:28:51,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:28:51,503 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:28:51,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:28:51,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:28:51,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:28:51,504 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:28:51,504 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:28:51,504 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:28:51,505 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:28:51,505 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:28:51,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:28:51,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:28:51,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:28:51,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:28:51,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:28:51,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:28:51,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:28:51,506 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:28:51,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:28:51,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:28:51,507 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:28:51,507 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:28:51,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:28:51,508 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_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2022-11-25 18:28:51,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:28:51,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:28:51,809 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:28:51,811 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:28:51,811 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:28:51,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-11-25 18:28:54,847 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:28:55,112 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:28:55,113 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-11-25 18:28:55,148 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/data/348a90207/345f16a3677a4276b3afdf296e17a3b0/FLAG4c423a872 [2022-11-25 18:28:55,163 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/data/348a90207/345f16a3677a4276b3afdf296e17a3b0 [2022-11-25 18:28:55,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:28:55,167 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:28:55,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:28:55,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:28:55,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:28:55,173 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:28:55" (1/1) ... [2022-11-25 18:28:55,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@270e8c95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:55, skipping insertion in model container [2022-11-25 18:28:55,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:28:55" (1/1) ... [2022-11-25 18:28:55,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:28:55,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:28:55,875 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_77ec8664-102b-49a1-891e-8a23a06cf869/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-11-25 18:28:55,913 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:28:55,929 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:28:55,989 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_77ec8664-102b-49a1-891e-8a23a06cf869/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-11-25 18:28:56,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:28:56,068 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:28:56,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56 WrapperNode [2022-11-25 18:28:56,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:28:56,070 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:28:56,070 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:28:56,070 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:28:56,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,133 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-11-25 18:28:56,133 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:28:56,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:28:56,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:28:56,134 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:28:56,144 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,144 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,148 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,148 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,156 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,164 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,169 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:28:56,170 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:28:56,170 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:28:56,170 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:28:56,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (1/1) ... [2022-11-25 18:28:56,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:28:56,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:56,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:28:56,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:28:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:28:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:28:56,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:28:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:28:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:28:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:28:56,245 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 18:28:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 18:28:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:28:56,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:28:56,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:28:56,248 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:28:56,389 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:28:56,391 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:28:56,880 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:28:56,888 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:28:56,889 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-25 18:28:56,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:28:56 BoogieIcfgContainer [2022-11-25 18:28:56,891 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:28:56,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:28:56,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:28:56,903 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:28:56,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:28:55" (1/3) ... [2022-11-25 18:28:56,904 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3660ff84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:28:56, skipping insertion in model container [2022-11-25 18:28:56,904 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:28:56" (2/3) ... [2022-11-25 18:28:56,906 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3660ff84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:28:56, skipping insertion in model container [2022-11-25 18:28:56,907 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:28:56" (3/3) ... [2022-11-25 18:28:56,908 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2022-11-25 18:28:56,925 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:28:56,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-11-25 18:28:56,925 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:28:57,022 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 18:28:57,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 228 transitions, 464 flow [2022-11-25 18:28:57,252 INFO L130 PetriNetUnfolder]: 45/317 cut-off events. [2022-11-25 18:28:57,252 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-25 18:28:57,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 317 events. 45/317 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1164 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 177. Up to 8 conditions per place. [2022-11-25 18:28:57,262 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 228 transitions, 464 flow [2022-11-25 18:28:57,271 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 228 transitions, 464 flow [2022-11-25 18:28:57,275 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:28:57,291 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 228 transitions, 464 flow [2022-11-25 18:28:57,297 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 228 transitions, 464 flow [2022-11-25 18:28:57,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 228 transitions, 464 flow [2022-11-25 18:28:57,353 INFO L130 PetriNetUnfolder]: 45/317 cut-off events. [2022-11-25 18:28:57,353 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-25 18:28:57,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 317 events. 45/317 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1164 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 177. Up to 8 conditions per place. [2022-11-25 18:28:57,363 INFO L119 LiptonReduction]: Number of co-enabled transitions 15770 [2022-11-25 18:29:03,108 INFO L134 LiptonReduction]: Checked pairs total: 31912 [2022-11-25 18:29:03,109 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-25 18:29:03,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:29:03,131 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;@2d197b00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:29:03,132 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-25 18:29:03,134 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-11-25 18:29:03,134 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:29:03,135 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:03,135 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:29:03,136 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 18:29:03,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:03,141 INFO L85 PathProgramCache]: Analyzing trace with hash 917234, now seen corresponding path program 1 times [2022-11-25 18:29:03,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:03,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724912426] [2022-11-25 18:29:03,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:03,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:03,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:03,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724912426] [2022-11-25 18:29:03,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724912426] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:03,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:03,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:03,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076674017] [2022-11-25 18:29:03,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:03,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:03,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:03,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:03,496 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 460 [2022-11-25 18:29:03,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:03,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 460 [2022-11-25 18:29:03,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:03,812 INFO L130 PetriNetUnfolder]: 610/1362 cut-off events. [2022-11-25 18:29:03,812 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:29:03,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1362 events. 610/1362 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8748 event pairs, 560 based on Foata normal form. 102/953 useless extension candidates. Maximal degree in co-relation 2490. Up to 1202 conditions per place. [2022-11-25 18:29:03,821 INFO L137 encePairwiseOnDemand]: 429/460 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-11-25 18:29:03,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 252 flow [2022-11-25 18:29:03,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:29:03,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:29:03,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2022-11-25 18:29:03,837 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48043478260869565 [2022-11-25 18:29:03,838 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2022-11-25 18:29:03,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2022-11-25 18:29:03,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:03,843 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2022-11-25 18:29:03,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,856 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,858 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 196 flow. Second operand 3 states and 663 transitions. [2022-11-25 18:29:03,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 252 flow [2022-11-25 18:29:03,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:29:03,865 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2022-11-25 18:29:03,867 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-11-25 18:29:03,871 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-11-25 18:29:03,871 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2022-11-25 18:29:03,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:03,872 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:03,872 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:29:03,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:29:03,873 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 18:29:03,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:03,873 INFO L85 PathProgramCache]: Analyzing trace with hash 28404717, now seen corresponding path program 1 times [2022-11-25 18:29:03,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:03,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495325389] [2022-11-25 18:29:03,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:03,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:03,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:03,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495325389] [2022-11-25 18:29:03,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495325389] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:03,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508597530] [2022-11-25 18:29:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:03,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:03,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:03,961 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:03,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:29:04,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:04,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:29:04,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:04,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:04,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:04,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508597530] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:04,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:04,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 18:29:04,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380969976] [2022-11-25 18:29:04,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:04,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:29:04,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:04,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:29:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:29:04,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 460 [2022-11-25 18:29:04,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 193.28571428571428) internal successors, (1353), 7 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:04,162 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 460 [2022-11-25 18:29:04,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:04,576 INFO L130 PetriNetUnfolder]: 610/1365 cut-off events. [2022-11-25 18:29:04,576 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:29:04,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 1365 events. 610/1365 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8770 event pairs, 560 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 2575. Up to 1202 conditions per place. [2022-11-25 18:29:04,584 INFO L137 encePairwiseOnDemand]: 457/460 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-11-25 18:29:04,584 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 280 flow [2022-11-25 18:29:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:29:04,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:29:04,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1213 transitions. [2022-11-25 18:29:04,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4394927536231884 [2022-11-25 18:29:04,609 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1213 transitions. [2022-11-25 18:29:04,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1213 transitions. [2022-11-25 18:29:04,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:04,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1213 transitions. [2022-11-25 18:29:04,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,621 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 460.0) internal successors, (3220), 7 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,622 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1213 transitions. [2022-11-25 18:29:04,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 280 flow [2022-11-25 18:29:04,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 276 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:29:04,626 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2022-11-25 18:29:04,627 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2022-11-25 18:29:04,627 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-11-25 18:29:04,628 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2022-11-25 18:29:04,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.28571428571428) internal successors, (1353), 7 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:04,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:04,629 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:29:04,639 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 18:29:04,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:04,834 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 18:29:04,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 67036594, now seen corresponding path program 2 times [2022-11-25 18:29:04,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:04,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894182399] [2022-11-25 18:29:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:04,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:29:04,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:04,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894182399] [2022-11-25 18:29:04,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894182399] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:04,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:04,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:04,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139461816] [2022-11-25 18:29:04,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:04,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:04,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:04,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:04,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:05,011 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 460 [2022-11-25 18:29:05,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:05,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 460 [2022-11-25 18:29:05,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:05,268 INFO L130 PetriNetUnfolder]: 566/1269 cut-off events. [2022-11-25 18:29:05,268 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:29:05,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2420 conditions, 1269 events. 566/1269 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8114 event pairs, 480 based on Foata normal form. 0/817 useless extension candidates. Maximal degree in co-relation 2386. Up to 1031 conditions per place. [2022-11-25 18:29:05,275 INFO L137 encePairwiseOnDemand]: 455/460 looper letters, 73 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2022-11-25 18:29:05,276 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 88 transitions, 372 flow [2022-11-25 18:29:05,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:29:05,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:29:05,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2022-11-25 18:29:05,278 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4644927536231884 [2022-11-25 18:29:05,278 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2022-11-25 18:29:05,278 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2022-11-25 18:29:05,279 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:05,279 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2022-11-25 18:29:05,281 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 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) [2022-11-25 18:29:05,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,285 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,285 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 641 transitions. [2022-11-25 18:29:05,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 88 transitions, 372 flow [2022-11-25 18:29:05,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 88 transitions, 358 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:29:05,291 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 172 flow [2022-11-25 18:29:05,291 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2022-11-25 18:29:05,293 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2022-11-25 18:29:05,293 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 172 flow [2022-11-25 18:29:05,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,294 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:05,294 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:29:05,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:29:05,294 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 18:29:05,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 67036592, now seen corresponding path program 1 times [2022-11-25 18:29:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:05,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869797507] [2022-11-25 18:29:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:05,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:05,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:05,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:05,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:05,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869797507] [2022-11-25 18:29:05,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869797507] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:05,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384983423] [2022-11-25 18:29:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:05,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:05,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:05,462 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:05,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:29:05,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:05,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:29:05,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:05,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:05,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:05,654 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:05,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384983423] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:05,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:05,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 18:29:05,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292185001] [2022-11-25 18:29:05,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:05,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:29:05,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:05,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:29:05,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:29:05,705 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 460 [2022-11-25 18:29:05,709 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 193.15384615384616) internal successors, (2511), 13 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:05,709 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:05,709 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 460 [2022-11-25 18:29:05,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:06,029 INFO L130 PetriNetUnfolder]: 568/1279 cut-off events. [2022-11-25 18:29:06,030 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-11-25 18:29:06,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2487 conditions, 1279 events. 568/1279 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8075 event pairs, 520 based on Foata normal form. 6/856 useless extension candidates. Maximal degree in co-relation 2435. Up to 1118 conditions per place. [2022-11-25 18:29:06,037 INFO L137 encePairwiseOnDemand]: 457/460 looper letters, 51 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2022-11-25 18:29:06,038 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 332 flow [2022-11-25 18:29:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:29:06,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:29:06,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2372 transitions. [2022-11-25 18:29:06,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42971014492753623 [2022-11-25 18:29:06,044 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2372 transitions. [2022-11-25 18:29:06,045 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2372 transitions. [2022-11-25 18:29:06,046 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:06,046 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2372 transitions. [2022-11-25 18:29:06,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 197.66666666666666) internal successors, (2372), 12 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,060 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 460.0) internal successors, (5980), 13 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,063 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 460.0) internal successors, (5980), 13 states have internal predecessors, (5980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,063 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 172 flow. Second operand 12 states and 2372 transitions. [2022-11-25 18:29:06,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 332 flow [2022-11-25 18:29:06,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:29:06,067 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 250 flow [2022-11-25 18:29:06,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2022-11-25 18:29:06,068 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2022-11-25 18:29:06,068 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 250 flow [2022-11-25 18:29:06,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.15384615384616) internal successors, (2511), 13 states have internal predecessors, (2511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,070 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:06,070 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-11-25 18:29:06,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:06,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:06,276 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 18:29:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:06,276 INFO L85 PathProgramCache]: Analyzing trace with hash -710497328, now seen corresponding path program 2 times [2022-11-25 18:29:06,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:06,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439909988] [2022-11-25 18:29:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:06,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:06,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:06,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:06,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439909988] [2022-11-25 18:29:06,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439909988] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:06,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:06,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:06,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252198239] [2022-11-25 18:29:06,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:06,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:06,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:06,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:06,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:06,490 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 460 [2022-11-25 18:29:06,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:06,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 460 [2022-11-25 18:29:06,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:06,769 INFO L130 PetriNetUnfolder]: 568/1260 cut-off events. [2022-11-25 18:29:06,771 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-25 18:29:06,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2442 conditions, 1260 events. 568/1260 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7978 event pairs, 275 based on Foata normal form. 0/816 useless extension candidates. Maximal degree in co-relation 2366. Up to 1085 conditions per place. [2022-11-25 18:29:06,779 INFO L137 encePairwiseOnDemand]: 456/460 looper letters, 81 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2022-11-25 18:29:06,780 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 458 flow [2022-11-25 18:29:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:29:06,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:29:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 651 transitions. [2022-11-25 18:29:06,782 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4717391304347826 [2022-11-25 18:29:06,783 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 651 transitions. [2022-11-25 18:29:06,783 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 651 transitions. [2022-11-25 18:29:06,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:06,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 651 transitions. [2022-11-25 18:29:06,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,787 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 460.0) internal successors, (1840), 4 states have internal predecessors, (1840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,788 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 250 flow. Second operand 3 states and 651 transitions. [2022-11-25 18:29:06,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 458 flow [2022-11-25 18:29:06,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 95 transitions, 410 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 18:29:06,798 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 212 flow [2022-11-25 18:29:06,798 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2022-11-25 18:29:06,800 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-11-25 18:29:06,801 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 212 flow [2022-11-25 18:29:06,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:06,801 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:06,801 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:06,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:29:06,802 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 18:29:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:06,802 INFO L85 PathProgramCache]: Analyzing trace with hash -826369790, now seen corresponding path program 1 times [2022-11-25 18:29:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:06,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431904335] [2022-11-25 18:29:06,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:06,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:06,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:07,028 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:07,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431904335] [2022-11-25 18:29:07,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431904335] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:07,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006956459] [2022-11-25 18:29:07,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:07,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:07,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:07,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:07,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:29:07,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:07,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:29:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:07,195 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:29:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:07,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:07,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006956459] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:07,321 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:07,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-25 18:29:07,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422296318] [2022-11-25 18:29:07,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:07,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:29:07,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:29:07,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:29:07,770 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 188 out of 460 [2022-11-25 18:29:07,772 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 212 flow. Second operand has 8 states, 8 states have (on average 190.125) internal successors, (1521), 8 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:07,772 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:07,772 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 188 of 460 [2022-11-25 18:29:07,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:07,926 INFO L130 PetriNetUnfolder]: 42/144 cut-off events. [2022-11-25 18:29:07,926 INFO L131 PetriNetUnfolder]: For 87/87 co-relation queries the response was YES. [2022-11-25 18:29:07,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 366 conditions, 144 events. 42/144 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 571 event pairs, 0 based on Foata normal form. 21/143 useless extension candidates. Maximal degree in co-relation 313. Up to 82 conditions per place. [2022-11-25 18:29:07,929 INFO L137 encePairwiseOnDemand]: 456/460 looper letters, 55 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2022-11-25 18:29:07,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 64 transitions, 299 flow [2022-11-25 18:29:07,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:29:07,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:29:07,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 801 transitions. [2022-11-25 18:29:07,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43532608695652175 [2022-11-25 18:29:07,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 801 transitions. [2022-11-25 18:29:07,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 801 transitions. [2022-11-25 18:29:07,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:07,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 801 transitions. [2022-11-25 18:29:07,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 200.25) internal successors, (801), 4 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:07,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:07,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 460.0) internal successors, (2300), 5 states have internal predecessors, (2300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:07,948 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 212 flow. Second operand 4 states and 801 transitions. [2022-11-25 18:29:07,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 64 transitions, 299 flow [2022-11-25 18:29:07,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 64 transitions, 293 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 18:29:07,952 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 141 flow [2022-11-25 18:29:07,953 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=460, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=4, PETRI_FLOW=141, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2022-11-25 18:29:07,953 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2022-11-25 18:29:07,953 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 141 flow [2022-11-25 18:29:07,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 190.125) internal successors, (1521), 8 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:07,954 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:07,955 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-25 18:29:07,960 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:08,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:29:08,155 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 18:29:08,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:08,156 INFO L85 PathProgramCache]: Analyzing trace with hash 152340979, now seen corresponding path program 1 times [2022-11-25 18:29:08,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:08,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766315917] [2022-11-25 18:29:08,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:08,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:08,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:29:08,193 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:29:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:29:08,237 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:29:08,238 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:29:08,240 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-11-25 18:29:08,242 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-11-25 18:29:08,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-11-25 18:29:08,245 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-11-25 18:29:08,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-11-25 18:29:08,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-11-25 18:29:08,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-11-25 18:29:08,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-11-25 18:29:08,248 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-11-25 18:29:08,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-11-25 18:29:08,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-11-25 18:29:08,249 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (27 of 39 remaining) [2022-11-25 18:29:08,251 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-11-25 18:29:08,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-11-25 18:29:08,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-11-25 18:29:08,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-11-25 18:29:08,252 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-11-25 18:29:08,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-11-25 18:29:08,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-11-25 18:29:08,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-11-25 18:29:08,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-11-25 18:29:08,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-11-25 18:29:08,253 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-11-25 18:29:08,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-11-25 18:29:08,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-11-25 18:29:08,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-11-25 18:29:08,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-11-25 18:29:08,254 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-11-25 18:29:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-11-25 18:29:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-11-25 18:29:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-11-25 18:29:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-11-25 18:29:08,255 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-11-25 18:29:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-11-25 18:29:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-11-25 18:29:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-11-25 18:29:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-11-25 18:29:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-11-25 18:29:08,256 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-11-25 18:29:08,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:29:08,257 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-11-25 18:29:08,259 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:29:08,260 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:29:08,313 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:29:08,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 313 transitions, 644 flow [2022-11-25 18:29:08,398 INFO L130 PetriNetUnfolder]: 75/521 cut-off events. [2022-11-25 18:29:08,398 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-11-25 18:29:08,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 521 events. 75/521 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2362 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 319. Up to 12 conditions per place. [2022-11-25 18:29:08,403 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 313 transitions, 644 flow [2022-11-25 18:29:08,411 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 313 transitions, 644 flow [2022-11-25 18:29:08,411 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:29:08,411 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 313 transitions, 644 flow [2022-11-25 18:29:08,412 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 313 transitions, 644 flow [2022-11-25 18:29:08,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 313 transitions, 644 flow [2022-11-25 18:29:08,512 INFO L130 PetriNetUnfolder]: 75/521 cut-off events. [2022-11-25 18:29:08,512 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-11-25 18:29:08,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 521 events. 75/521 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 2362 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 319. Up to 12 conditions per place. [2022-11-25 18:29:08,540 INFO L119 LiptonReduction]: Number of co-enabled transitions 47144 [2022-11-25 18:29:16,007 INFO L134 LiptonReduction]: Checked pairs total: 100567 [2022-11-25 18:29:16,007 INFO L136 LiptonReduction]: Total number of compositions: 315 [2022-11-25 18:29:16,009 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:29:16,010 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;@2d197b00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:29:16,010 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-11-25 18:29:16,012 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 18:29:16,012 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:29:16,012 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:16,012 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:29:16,013 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1624104, now seen corresponding path program 1 times [2022-11-25 18:29:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:16,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428985341] [2022-11-25 18:29:16,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:16,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:16,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:16,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:16,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428985341] [2022-11-25 18:29:16,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428985341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:16,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:16,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:16,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218839810] [2022-11-25 18:29:16,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:16,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:16,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:16,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:16,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 628 [2022-11-25 18:29:16,050 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 137 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:16,050 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:16,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 628 [2022-11-25 18:29:16,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:21,607 INFO L130 PetriNetUnfolder]: 27389/44939 cut-off events. [2022-11-25 18:29:21,607 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-11-25 18:29:21,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85757 conditions, 44939 events. 27389/44939 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 1932. Compared 384367 event pairs, 25858 based on Foata normal form. 4177/32751 useless extension candidates. Maximal degree in co-relation 37314. Up to 40683 conditions per place. [2022-11-25 18:29:21,872 INFO L137 encePairwiseOnDemand]: 585/628 looper letters, 76 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2022-11-25 18:29:21,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 370 flow [2022-11-25 18:29:21,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:29:21,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:29:21,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 908 transitions. [2022-11-25 18:29:21,877 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4819532908704883 [2022-11-25 18:29:21,877 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 908 transitions. [2022-11-25 18:29:21,877 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 908 transitions. [2022-11-25 18:29:21,878 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:21,878 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 908 transitions. [2022-11-25 18:29:21,880 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.6666666666667) internal successors, (908), 3 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:21,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:21,885 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:21,885 INFO L175 Difference]: Start difference. First operand has 104 places, 137 transitions, 292 flow. Second operand 3 states and 908 transitions. [2022-11-25 18:29:21,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 370 flow [2022-11-25 18:29:21,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 370 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:29:21,889 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 224 flow [2022-11-25 18:29:21,889 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2022-11-25 18:29:21,890 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -5 predicate places. [2022-11-25 18:29:21,891 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 224 flow [2022-11-25 18:29:21,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:21,891 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:21,892 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:29:21,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:29:21,892 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:21,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:21,892 INFO L85 PathProgramCache]: Analyzing trace with hash 50297794, now seen corresponding path program 1 times [2022-11-25 18:29:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:21,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308928446] [2022-11-25 18:29:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:21,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308928446] [2022-11-25 18:29:21,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308928446] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036863843] [2022-11-25 18:29:21,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:21,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:21,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:21,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:21,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:29:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:22,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:29:22,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:22,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:22,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:22,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036863843] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:22,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:22,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 18:29:22,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020061446] [2022-11-25 18:29:22,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:22,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:29:22,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:22,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:29:22,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:29:22,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 628 [2022-11-25 18:29:22,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 224 flow. Second operand has 7 states, 7 states have (on average 263.2857142857143) internal successors, (1843), 7 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:22,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:22,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 628 [2022-11-25 18:29:22,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:26,082 INFO L130 PetriNetUnfolder]: 27389/44942 cut-off events. [2022-11-25 18:29:26,082 INFO L131 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-11-25 18:29:26,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85773 conditions, 44942 events. 27389/44942 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 1932. Compared 384365 event pairs, 25858 based on Foata normal form. 0/28577 useless extension candidates. Maximal degree in co-relation 85760. Up to 40683 conditions per place. [2022-11-25 18:29:26,318 INFO L137 encePairwiseOnDemand]: 625/628 looper letters, 76 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2022-11-25 18:29:26,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 398 flow [2022-11-25 18:29:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:29:26,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:29:26,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1656 transitions. [2022-11-25 18:29:26,323 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4394904458598726 [2022-11-25 18:29:26,323 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1656 transitions. [2022-11-25 18:29:26,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1656 transitions. [2022-11-25 18:29:26,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:26,325 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1656 transitions. [2022-11-25 18:29:26,329 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:26,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 628.0) internal successors, (4396), 7 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:26,336 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 628.0) internal successors, (4396), 7 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:26,337 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 224 flow. Second operand 6 states and 1656 transitions. [2022-11-25 18:29:26,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 398 flow [2022-11-25 18:29:26,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 394 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:29:26,340 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 256 flow [2022-11-25 18:29:26,340 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2022-11-25 18:29:26,342 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2022-11-25 18:29:26,343 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 256 flow [2022-11-25 18:29:26,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 263.2857142857143) internal successors, (1843), 7 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:26,345 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:26,345 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:29:26,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:26,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:26,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:26,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:26,552 INFO L85 PathProgramCache]: Analyzing trace with hash -571120023, now seen corresponding path program 2 times [2022-11-25 18:29:26,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:26,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494875158] [2022-11-25 18:29:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:29:26,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:26,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494875158] [2022-11-25 18:29:26,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494875158] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:26,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:26,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989548425] [2022-11-25 18:29:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:26,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:26,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:26,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 628 [2022-11-25 18:29:26,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:26,680 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:26,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 628 [2022-11-25 18:29:26,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:30,511 INFO L130 PetriNetUnfolder]: 25427/41538 cut-off events. [2022-11-25 18:29:30,512 INFO L131 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2022-11-25 18:29:30,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79529 conditions, 41538 events. 25427/41538 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 1801. Compared 353068 event pairs, 22190 based on Foata normal form. 0/26841 useless extension candidates. Maximal degree in co-relation 79494. Up to 34933 conditions per place. [2022-11-25 18:29:30,774 INFO L137 encePairwiseOnDemand]: 623/628 looper letters, 117 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2022-11-25 18:29:30,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 140 transitions, 574 flow [2022-11-25 18:29:30,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:29:30,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:29:30,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2022-11-25 18:29:30,778 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4750530785562633 [2022-11-25 18:29:30,778 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2022-11-25 18:29:30,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2022-11-25 18:29:30,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:30,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2022-11-25 18:29:30,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:30,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:30,788 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:30,788 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 256 flow. Second operand 3 states and 895 transitions. [2022-11-25 18:29:30,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 140 transitions, 574 flow [2022-11-25 18:29:30,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 140 transitions, 560 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:29:30,792 INFO L231 Difference]: Finished difference. Result has 105 places, 99 transitions, 244 flow [2022-11-25 18:29:30,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=105, PETRI_TRANSITIONS=99} [2022-11-25 18:29:30,793 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-11-25 18:29:30,793 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 99 transitions, 244 flow [2022-11-25 18:29:30,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:30,794 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:30,794 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:29:30,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:29:30,794 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:30,795 INFO L85 PathProgramCache]: Analyzing trace with hash -571120024, now seen corresponding path program 1 times [2022-11-25 18:29:30,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:30,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460324614] [2022-11-25 18:29:30,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:30,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,878 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:30,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460324614] [2022-11-25 18:29:30,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460324614] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:30,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099514742] [2022-11-25 18:29:30,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:30,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:30,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:30,884 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:30,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:29:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:30,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:29:30,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:31,003 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:31,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:31,062 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:31,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099514742] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:31,063 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:31,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 18:29:31,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024874133] [2022-11-25 18:29:31,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:31,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:29:31,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:31,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:29:31,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:29:31,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 628 [2022-11-25 18:29:31,121 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 99 transitions, 244 flow. Second operand has 13 states, 13 states have (on average 263.15384615384613) internal successors, (3421), 13 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:31,129 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:31,129 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 628 [2022-11-25 18:29:31,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:35,196 INFO L130 PetriNetUnfolder]: 25477/41818 cut-off events. [2022-11-25 18:29:35,196 INFO L131 PetriNetUnfolder]: For 675/675 co-relation queries the response was YES. [2022-11-25 18:29:35,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80834 conditions, 41818 events. 25477/41818 cut-off events. For 675/675 co-relation queries the response was YES. Maximal size of possible extension queue 1810. Compared 355556 event pairs, 24034 based on Foata normal form. 6/27646 useless extension candidates. Maximal degree in co-relation 80781. Up to 37830 conditions per place. [2022-11-25 18:29:35,402 INFO L137 encePairwiseOnDemand]: 625/628 looper letters, 74 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2022-11-25 18:29:35,402 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 105 transitions, 450 flow [2022-11-25 18:29:35,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:29:35,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:29:35,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3235 transitions. [2022-11-25 18:29:35,416 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4292728237791932 [2022-11-25 18:29:35,416 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3235 transitions. [2022-11-25 18:29:35,416 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3235 transitions. [2022-11-25 18:29:35,418 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:35,418 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3235 transitions. [2022-11-25 18:29:35,426 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 269.5833333333333) internal successors, (3235), 12 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:35,436 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 628.0) internal successors, (8164), 13 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:35,438 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 628.0) internal successors, (8164), 13 states have internal predecessors, (8164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:35,438 INFO L175 Difference]: Start difference. First operand has 105 places, 99 transitions, 244 flow. Second operand 12 states and 3235 transitions. [2022-11-25 18:29:35,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 105 transitions, 450 flow [2022-11-25 18:29:35,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 105 transitions, 444 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:29:35,458 INFO L231 Difference]: Finished difference. Result has 120 places, 105 transitions, 322 flow [2022-11-25 18:29:35,459 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=120, PETRI_TRANSITIONS=105} [2022-11-25 18:29:35,459 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 16 predicate places. [2022-11-25 18:29:35,460 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 105 transitions, 322 flow [2022-11-25 18:29:35,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 263.15384615384613) internal successors, (3421), 13 states have internal predecessors, (3421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:35,461 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:35,461 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-11-25 18:29:35,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:35,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:35,667 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:35,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:35,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1860552760, now seen corresponding path program 2 times [2022-11-25 18:29:35,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:35,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728190393] [2022-11-25 18:29:35,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:35,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:35,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:35,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728190393] [2022-11-25 18:29:35,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728190393] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:35,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:35,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:35,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83284865] [2022-11-25 18:29:35,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:35,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:35,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:35,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:35,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:35,862 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 628 [2022-11-25 18:29:35,863 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 105 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:35,863 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:35,863 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 628 [2022-11-25 18:29:35,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:39,777 INFO L130 PetriNetUnfolder]: 25709/41752 cut-off events. [2022-11-25 18:29:39,778 INFO L131 PetriNetUnfolder]: For 155/155 co-relation queries the response was YES. [2022-11-25 18:29:39,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79841 conditions, 41752 events. 25709/41752 cut-off events. For 155/155 co-relation queries the response was YES. Maximal size of possible extension queue 1821. Compared 350486 event pairs, 18083 based on Foata normal form. 0/27276 useless extension candidates. Maximal degree in co-relation 79764. Up to 37864 conditions per place. [2022-11-25 18:29:40,021 INFO L137 encePairwiseOnDemand]: 624/628 looper letters, 106 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2022-11-25 18:29:40,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 128 transitions, 584 flow [2022-11-25 18:29:40,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:29:40,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:29:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 886 transitions. [2022-11-25 18:29:40,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.470276008492569 [2022-11-25 18:29:40,025 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 886 transitions. [2022-11-25 18:29:40,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 886 transitions. [2022-11-25 18:29:40,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:40,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 886 transitions. [2022-11-25 18:29:40,028 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 295.3333333333333) internal successors, (886), 3 states have internal predecessors, (886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:40,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:40,032 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 628.0) internal successors, (2512), 4 states have internal predecessors, (2512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:40,032 INFO L175 Difference]: Start difference. First operand has 120 places, 105 transitions, 322 flow. Second operand 3 states and 886 transitions. [2022-11-25 18:29:40,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 128 transitions, 584 flow [2022-11-25 18:29:40,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 128 transitions, 536 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 18:29:40,037 INFO L231 Difference]: Finished difference. Result has 118 places, 106 transitions, 288 flow [2022-11-25 18:29:40,037 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=288, PETRI_PLACES=118, PETRI_TRANSITIONS=106} [2022-11-25 18:29:40,038 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 14 predicate places. [2022-11-25 18:29:40,038 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 106 transitions, 288 flow [2022-11-25 18:29:40,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:40,038 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:40,039 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:40,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:29:40,039 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:40,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash -2002229003, now seen corresponding path program 1 times [2022-11-25 18:29:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:40,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238272081] [2022-11-25 18:29:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:40,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:40,284 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:40,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:40,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238272081] [2022-11-25 18:29:40,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238272081] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:40,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:40,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:29:40,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810975830] [2022-11-25 18:29:40,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:40,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:29:40,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:29:40,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:40,837 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 628 [2022-11-25 18:29:40,839 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 106 transitions, 288 flow. Second operand has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:40,839 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:40,839 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 628 [2022-11-25 18:29:40,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:43,184 INFO L130 PetriNetUnfolder]: 13533/22347 cut-off events. [2022-11-25 18:29:43,184 INFO L131 PetriNetUnfolder]: For 655/655 co-relation queries the response was YES. [2022-11-25 18:29:43,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43660 conditions, 22347 events. 13533/22347 cut-off events. For 655/655 co-relation queries the response was YES. Maximal size of possible extension queue 896. Compared 176410 event pairs, 3229 based on Foata normal form. 1268/18601 useless extension candidates. Maximal degree in co-relation 43606. Up to 17059 conditions per place. [2022-11-25 18:29:43,334 INFO L137 encePairwiseOnDemand]: 608/628 looper letters, 173 selfloop transitions, 7 changer transitions 0/197 dead transitions. [2022-11-25 18:29:43,334 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 197 transitions, 847 flow [2022-11-25 18:29:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:29:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:29:43,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1647 transitions. [2022-11-25 18:29:43,340 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43710191082802546 [2022-11-25 18:29:43,340 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1647 transitions. [2022-11-25 18:29:43,340 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1647 transitions. [2022-11-25 18:29:43,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:43,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1647 transitions. [2022-11-25 18:29:43,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 274.5) internal successors, (1647), 6 states have internal predecessors, (1647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:43,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 628.0) internal successors, (4396), 7 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:43,354 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 628.0) internal successors, (4396), 7 states have internal predecessors, (4396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:43,354 INFO L175 Difference]: Start difference. First operand has 118 places, 106 transitions, 288 flow. Second operand 6 states and 1647 transitions. [2022-11-25 18:29:43,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 197 transitions, 847 flow [2022-11-25 18:29:43,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 197 transitions, 844 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:29:43,360 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 331 flow [2022-11-25 18:29:43,360 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2022-11-25 18:29:43,361 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 14 predicate places. [2022-11-25 18:29:43,361 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 331 flow [2022-11-25 18:29:43,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 243.6) internal successors, (1218), 5 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:43,362 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:43,362 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:43,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:29:43,362 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:43,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:43,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2002834624, now seen corresponding path program 1 times [2022-11-25 18:29:43,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:43,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761557718] [2022-11-25 18:29:43,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:43,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:43,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:43,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:43,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761557718] [2022-11-25 18:29:43,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761557718] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:43,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326749531] [2022-11-25 18:29:43,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:43,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:43,511 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:43,512 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:43,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:29:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:43,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:29:43,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:43,651 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:29:43,696 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:43,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:43,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326749531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:43,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:43,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-25 18:29:43,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096085273] [2022-11-25 18:29:43,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:43,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:29:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:29:43,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:29:44,247 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 628 [2022-11-25 18:29:44,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 331 flow. Second operand has 8 states, 8 states have (on average 260.125) internal successors, (2081), 8 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:44,250 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:44,250 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 628 [2022-11-25 18:29:44,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:44,735 INFO L130 PetriNetUnfolder]: 1397/2550 cut-off events. [2022-11-25 18:29:44,736 INFO L131 PetriNetUnfolder]: For 821/821 co-relation queries the response was YES. [2022-11-25 18:29:44,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5609 conditions, 2550 events. 1397/2550 cut-off events. For 821/821 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15640 event pairs, 219 based on Foata normal form. 285/2538 useless extension candidates. Maximal degree in co-relation 5552. Up to 1590 conditions per place. [2022-11-25 18:29:44,753 INFO L137 encePairwiseOnDemand]: 624/628 looper letters, 93 selfloop transitions, 3 changer transitions 0/107 dead transitions. [2022-11-25 18:29:44,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 107 transitions, 485 flow [2022-11-25 18:29:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:29:44,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:29:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1380 transitions. [2022-11-25 18:29:44,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4394904458598726 [2022-11-25 18:29:44,758 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1380 transitions. [2022-11-25 18:29:44,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1380 transitions. [2022-11-25 18:29:44,760 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:44,760 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1380 transitions. [2022-11-25 18:29:44,764 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:44,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 628.0) internal successors, (3768), 6 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:44,770 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 628.0) internal successors, (3768), 6 states have internal predecessors, (3768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:44,770 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 331 flow. Second operand 5 states and 1380 transitions. [2022-11-25 18:29:44,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 107 transitions, 485 flow [2022-11-25 18:29:44,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 471 flow, removed 1 selfloop flow, removed 4 redundant places. [2022-11-25 18:29:44,776 INFO L231 Difference]: Finished difference. Result has 79 places, 60 transitions, 189 flow [2022-11-25 18:29:44,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=189, PETRI_PLACES=79, PETRI_TRANSITIONS=60} [2022-11-25 18:29:44,777 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -25 predicate places. [2022-11-25 18:29:44,777 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 60 transitions, 189 flow [2022-11-25 18:29:44,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 260.125) internal successors, (2081), 8 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:44,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:44,778 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:44,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:44,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77ec8664-102b-49a1-891e-8a23a06cf869/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:44,984 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:44,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1939558654, now seen corresponding path program 1 times [2022-11-25 18:29:44,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:44,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717705763] [2022-11-25 18:29:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:45,450 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:29:45,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:45,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717705763] [2022-11-25 18:29:45,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717705763] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:45,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:45,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:29:45,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641835826] [2022-11-25 18:29:45,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:45,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:29:45,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:45,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:29:45,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:29:45,832 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 628 [2022-11-25 18:29:45,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 60 transitions, 189 flow. Second operand has 6 states, 6 states have (on average 236.5) internal successors, (1419), 6 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:45,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:45,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 628 [2022-11-25 18:29:45,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:46,169 INFO L130 PetriNetUnfolder]: 1334/2425 cut-off events. [2022-11-25 18:29:46,169 INFO L131 PetriNetUnfolder]: For 965/965 co-relation queries the response was YES. [2022-11-25 18:29:46,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5331 conditions, 2425 events. 1334/2425 cut-off events. For 965/965 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 14675 event pairs, 565 based on Foata normal form. 0/2183 useless extension candidates. Maximal degree in co-relation 5277. Up to 1387 conditions per place. [2022-11-25 18:29:46,183 INFO L137 encePairwiseOnDemand]: 622/628 looper letters, 69 selfloop transitions, 4 changer transitions 0/84 dead transitions. [2022-11-25 18:29:46,183 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 397 flow [2022-11-25 18:29:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:29:46,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:29:46,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1003 transitions. [2022-11-25 18:29:46,187 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39928343949044587 [2022-11-25 18:29:46,187 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1003 transitions. [2022-11-25 18:29:46,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1003 transitions. [2022-11-25 18:29:46,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:46,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1003 transitions. [2022-11-25 18:29:46,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 250.75) internal successors, (1003), 4 states have internal predecessors, (1003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:46,194 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 628.0) internal successors, (3140), 5 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:46,195 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 628.0) internal successors, (3140), 5 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:46,195 INFO L175 Difference]: Start difference. First operand has 79 places, 60 transitions, 189 flow. Second operand 4 states and 1003 transitions. [2022-11-25 18:29:46,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 397 flow [2022-11-25 18:29:46,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 84 transitions, 386 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 18:29:46,199 INFO L231 Difference]: Finished difference. Result has 80 places, 62 transitions, 205 flow [2022-11-25 18:29:46,199 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=205, PETRI_PLACES=80, PETRI_TRANSITIONS=62} [2022-11-25 18:29:46,199 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -24 predicate places. [2022-11-25 18:29:46,199 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 62 transitions, 205 flow [2022-11-25 18:29:46,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 236.5) internal successors, (1419), 6 states have internal predecessors, (1419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:46,200 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:46,200 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:46,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:29:46,201 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:46,201 INFO L85 PathProgramCache]: Analyzing trace with hash -2062072595, now seen corresponding path program 1 times [2022-11-25 18:29:46,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:46,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295186713] [2022-11-25 18:29:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:46,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 18:29:46,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295186713] [2022-11-25 18:29:46,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1295186713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:46,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:46,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:29:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095616982] [2022-11-25 18:29:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:29:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:46,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:29:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:29:46,750 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 628 [2022-11-25 18:29:46,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 62 transitions, 205 flow. Second operand 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) [2022-11-25 18:29:46,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:46,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 628 [2022-11-25 18:29:46,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:47,096 INFO L130 PetriNetUnfolder]: 1115/2044 cut-off events. [2022-11-25 18:29:47,097 INFO L131 PetriNetUnfolder]: For 407/407 co-relation queries the response was YES. [2022-11-25 18:29:47,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 2044 events. 1115/2044 cut-off events. For 407/407 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 12139 event pairs, 85 based on Foata normal form. 45/1994 useless extension candidates. Maximal degree in co-relation 4389. Up to 1656 conditions per place. [2022-11-25 18:29:47,109 INFO L137 encePairwiseOnDemand]: 623/628 looper letters, 61 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2022-11-25 18:29:47,109 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 361 flow [2022-11-25 18:29:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:29:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:29:47,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1021 transitions. [2022-11-25 18:29:47,113 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40644904458598724 [2022-11-25 18:29:47,113 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1021 transitions. [2022-11-25 18:29:47,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1021 transitions. [2022-11-25 18:29:47,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:47,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1021 transitions. [2022-11-25 18:29:47,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 255.25) internal successors, (1021), 4 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:47,120 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 628.0) internal successors, (3140), 5 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:47,121 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 628.0) internal successors, (3140), 5 states have internal predecessors, (3140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:47,121 INFO L175 Difference]: Start difference. First operand has 80 places, 62 transitions, 205 flow. Second operand 4 states and 1021 transitions. [2022-11-25 18:29:47,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 361 flow [2022-11-25 18:29:47,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 74 transitions, 355 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:29:47,125 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 198 flow [2022-11-25 18:29:47,125 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=628, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=198, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2022-11-25 18:29:47,126 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -26 predicate places. [2022-11-25 18:29:47,126 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 198 flow [2022-11-25 18:29:47,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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) [2022-11-25 18:29:47,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:47,127 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 18:29:47,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:29:47,127 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:29:47,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:47,128 INFO L85 PathProgramCache]: Analyzing trace with hash 481612049, now seen corresponding path program 1 times [2022-11-25 18:29:47,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:47,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181483186] [2022-11-25 18:29:47,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:29:47,167 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:29:47,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:29:47,214 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:29:47,214 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:29:47,215 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-11-25 18:29:47,215 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-11-25 18:29:47,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-11-25 18:29:47,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-11-25 18:29:47,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-11-25 18:29:47,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-11-25 18:29:47,219 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-11-25 18:29:47,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-11-25 18:29:47,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-11-25 18:29:47,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2022-11-25 18:29:47,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-11-25 18:29:47,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (38 of 50 remaining) [2022-11-25 18:29:47,220 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-11-25 18:29:47,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-11-25 18:29:47,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-11-25 18:29:47,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-11-25 18:29:47,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-11-25 18:29:47,221 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-11-25 18:29:47,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-11-25 18:29:47,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-11-25 18:29:47,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-11-25 18:29:47,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-11-25 18:29:47,222 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-11-25 18:29:47,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-11-25 18:29:47,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-11-25 18:29:47,223 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-11-25 18:29:47,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-11-25 18:29:47,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-11-25 18:29:47,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-11-25 18:29:47,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-11-25 18:29:47,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-11-25 18:29:47,224 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-11-25 18:29:47,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-11-25 18:29:47,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-11-25 18:29:47,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-11-25 18:29:47,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-11-25 18:29:47,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-11-25 18:29:47,225 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-11-25 18:29:47,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-11-25 18:29:47,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-11-25 18:29:47,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-11-25 18:29:47,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-11-25 18:29:47,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-11-25 18:29:47,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-11-25 18:29:47,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-11-25 18:29:47,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-11-25 18:29:47,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-11-25 18:29:47,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-11-25 18:29:47,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-11-25 18:29:47,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-11-25 18:29:47,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:29:47,228 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:47,229 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:29:47,229 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 18:29:47,289 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 18:29:47,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 398 transitions, 826 flow [2022-11-25 18:29:47,442 INFO L130 PetriNetUnfolder]: 110/768 cut-off events. [2022-11-25 18:29:47,443 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-11-25 18:29:47,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 768 events. 110/768 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3801 event pairs, 1 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 529. Up to 16 conditions per place. [2022-11-25 18:29:47,454 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 398 transitions, 826 flow [2022-11-25 18:29:47,468 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 398 transitions, 826 flow [2022-11-25 18:29:47,468 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:29:47,469 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 398 transitions, 826 flow [2022-11-25 18:29:47,469 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 398 transitions, 826 flow [2022-11-25 18:29:47,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 398 transitions, 826 flow [2022-11-25 18:29:47,705 INFO L130 PetriNetUnfolder]: 110/768 cut-off events. [2022-11-25 18:29:47,706 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-11-25 18:29:47,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 768 events. 110/768 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 3801 event pairs, 1 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 529. Up to 16 conditions per place. [2022-11-25 18:29:47,752 INFO L119 LiptonReduction]: Number of co-enabled transitions 92130 [2022-11-25 18:29:56,175 INFO L134 LiptonReduction]: Checked pairs total: 197744 [2022-11-25 18:29:56,175 INFO L136 LiptonReduction]: Total number of compositions: 389 [2022-11-25 18:29:56,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:29:56,177 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;@2d197b00, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:29:56,177 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-11-25 18:29:56,179 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-11-25 18:29:56,179 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:29:56,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:56,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:29:56,180 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-25 18:29:56,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:56,180 INFO L85 PathProgramCache]: Analyzing trace with hash 2488283, now seen corresponding path program 1 times [2022-11-25 18:29:56,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:56,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108639032] [2022-11-25 18:29:56,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:56,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:56,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:56,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:56,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:56,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108639032] [2022-11-25 18:29:56,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108639032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:56,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:29:56,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:29:56,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860129584] [2022-11-25 18:29:56,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:56,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:56,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:56,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:56,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:29:56,216 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 787 [2022-11-25 18:29:56,217 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 176 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:56,217 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:56,218 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 787 [2022-11-25 18:29:56,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand