./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.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_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/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_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/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_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/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 c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 --- 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 18:09:50,372 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:09:50,374 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:09:50,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:09:50,416 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:09:50,420 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:09:50,421 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:09:50,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:09:50,427 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:09:50,430 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:09:50,431 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:09:50,432 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:09:50,432 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:09:50,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:09:50,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:09:50,435 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:09:50,436 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:09:50,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:09:50,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:09:50,440 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:09:50,442 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:09:50,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:09:50,449 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:09:50,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:09:50,454 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:09:50,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:09:50,460 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:09:50,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:09:50,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:09:50,463 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:09:50,463 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:09:50,464 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:09:50,465 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:09:50,466 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:09:50,467 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:09:50,467 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:09:50,468 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:09:50,468 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:09:50,468 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:09:50,469 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:09:50,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:09:50,472 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:09:50,493 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:09:50,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:09:50,494 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:09:50,494 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:09:50,495 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:09:50,495 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:09:50,496 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:09:50,496 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:09:50,496 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:09:50,496 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:09:50,497 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:09:50,497 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:09:50,497 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:09:50,497 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:09:50,498 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:09:50,498 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:09:50,498 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:09:50,498 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:09:50,498 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:09:50,499 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:09:50,499 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:09:50,499 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:09:50,499 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:09:50,500 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:09:50,500 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:09:50,500 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:09:50,500 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:09:50,500 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:09:50,501 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:09:50,501 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:09:50,501 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:09:50,501 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:09:50,501 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:09:50,502 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_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c8af2e9e80aefb6a93651d6c869df13510f679bd9566c8571973545c9393aab5 [2022-11-25 18:09:50,760 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:09:50,780 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:09:50,783 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:09:50,784 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:09:50,785 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:09:50,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-25 18:09:53,814 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:09:54,174 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:09:54,174 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i [2022-11-25 18:09:54,190 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/data/10f81fe63/75e86ff60ad248b2a815e0d9f7014050/FLAG725967b2a [2022-11-25 18:09:54,215 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/data/10f81fe63/75e86ff60ad248b2a815e0d9f7014050 [2022-11-25 18:09:54,217 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:09:54,219 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:09:54,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:09:54,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:09:54,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:09:54,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5318e821 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54, skipping insertion in model container [2022-11-25 18:09:54,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:09:54,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:09:54,710 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_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-25 18:09:54,737 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:09:54,753 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:09:54,790 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_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/sv-benchmarks/c/goblint-regression/28-race_reach_73-funloop_hard_racefree.i[41323,41336] [2022-11-25 18:09:54,802 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:09:54,879 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:09:54,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54 WrapperNode [2022-11-25 18:09:54,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:09:54,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:09:54,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:09:54,881 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:09:54,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,917 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,950 INFO L138 Inliner]: procedures = 271, calls = 41, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 247 [2022-11-25 18:09:54,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:09:54,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:09:54,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:09:54,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:09:54,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:54,988 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:55,001 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:55,004 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:55,005 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:55,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:09:55,010 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:09:55,010 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:09:55,010 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:09:55,011 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (1/1) ... [2022-11-25 18:09:55,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:09:55,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:09:55,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:09:55,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:09:55,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:09:55,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:09:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:09:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:09:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:09:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:09:55,095 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 18:09:55,097 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 18:09:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:09:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:09:55,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:09:55,101 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 18:09:55,352 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:09:55,354 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:09:55,839 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:09:55,849 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:09:55,850 INFO L300 CfgBuilder]: Removed 35 assume(true) statements. [2022-11-25 18:09:55,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:55 BoogieIcfgContainer [2022-11-25 18:09:55,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:09:55,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:09:55,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:09:55,859 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:09:55,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:09:54" (1/3) ... [2022-11-25 18:09:55,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4d80ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:55, skipping insertion in model container [2022-11-25 18:09:55,861 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:09:54" (2/3) ... [2022-11-25 18:09:55,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4d80ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:09:55, skipping insertion in model container [2022-11-25 18:09:55,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:09:55" (3/3) ... [2022-11-25 18:09:55,863 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_73-funloop_hard_racefree.i [2022-11-25 18:09:55,889 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:09:55,889 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-25 18:09:55,889 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:09:56,027 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 18:09:56,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 293 transitions, 594 flow [2022-11-25 18:09:56,279 INFO L130 PetriNetUnfolder]: 73/459 cut-off events. [2022-11-25 18:09:56,280 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:09:56,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 459 events. 73/459 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2382 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2022-11-25 18:09:56,290 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 293 transitions, 594 flow [2022-11-25 18:09:56,310 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 293 transitions, 594 flow [2022-11-25 18:09:56,314 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:09:56,334 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 251 places, 293 transitions, 594 flow [2022-11-25 18:09:56,337 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 251 places, 293 transitions, 594 flow [2022-11-25 18:09:56,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 293 transitions, 594 flow [2022-11-25 18:09:56,439 INFO L130 PetriNetUnfolder]: 73/459 cut-off events. [2022-11-25 18:09:56,439 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:09:56,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 459 events. 73/459 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 2382 event pairs, 0 based on Foata normal form. 0/318 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2022-11-25 18:09:56,461 INFO L119 LiptonReduction]: Number of co-enabled transitions 27864 [2022-11-25 18:10:03,191 INFO L134 LiptonReduction]: Checked pairs total: 57555 [2022-11-25 18:10:03,191 INFO L136 LiptonReduction]: Total number of compositions: 289 [2022-11-25 18:10:03,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:10:03,229 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;@7485d66a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:10:03,230 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-11-25 18:10:03,242 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-11-25 18:10:03,242 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:10:03,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:03,244 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:10:03,246 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:10:03,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:03,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1154429, now seen corresponding path program 1 times [2022-11-25 18:10:03,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:03,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184328415] [2022-11-25 18:10:03,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:03,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:03,516 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 18:10:03,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:03,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184328415] [2022-11-25 18:10:03,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184328415] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:03,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:03,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:10:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725181922] [2022-11-25 18:10:03,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:03,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:10:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:03,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:10:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:10:03,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 246 out of 582 [2022-11-25 18:10:03,598 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 134 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 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 18:10:03,598 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:03,598 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 246 of 582 [2022-11-25 18:10:03,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:04,119 INFO L130 PetriNetUnfolder]: 1122/2454 cut-off events. [2022-11-25 18:10:04,119 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:10:04,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4575 conditions, 2454 events. 1122/2454 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17674 event pairs, 960 based on Foata normal form. 186/1893 useless extension candidates. Maximal degree in co-relation 4446. Up to 2113 conditions per place. [2022-11-25 18:10:04,134 INFO L137 encePairwiseOnDemand]: 538/582 looper letters, 75 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2022-11-25 18:10:04,134 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 350 flow [2022-11-25 18:10:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:10:04,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:10:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 857 transitions. [2022-11-25 18:10:04,156 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.490836197021764 [2022-11-25 18:10:04,156 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 857 transitions. [2022-11-25 18:10:04,157 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 857 transitions. [2022-11-25 18:10:04,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:04,164 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 857 transitions. [2022-11-25 18:10:04,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 285.6666666666667) internal successors, (857), 3 states have internal predecessors, (857), 0 states have call successors, (0), 0 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 18:10:04,181 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 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 18:10:04,182 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 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 18:10:04,184 INFO L175 Difference]: Start difference. First operand has 99 places, 134 transitions, 276 flow. Second operand 3 states and 857 transitions. [2022-11-25 18:10:04,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 350 flow [2022-11-25 18:10:04,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 94 transitions, 350 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:10:04,194 INFO L231 Difference]: Finished difference. Result has 92 places, 94 transitions, 206 flow [2022-11-25 18:10:04,196 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=206, PETRI_PLACES=92, PETRI_TRANSITIONS=94} [2022-11-25 18:10:04,200 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, -7 predicate places. [2022-11-25 18:10:04,201 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 94 transitions, 206 flow [2022-11-25 18:10:04,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 247.0) internal successors, (741), 3 states have internal predecessors, (741), 0 states have call successors, (0), 0 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 18:10:04,202 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:04,202 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:10:04,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:10:04,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:10:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:04,213 INFO L85 PathProgramCache]: Analyzing trace with hash 35807128, now seen corresponding path program 1 times [2022-11-25 18:10:04,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:04,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601692177] [2022-11-25 18:10:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:04,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:04,321 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 18:10:04,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601692177] [2022-11-25 18:10:04,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601692177] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599832926] [2022-11-25 18:10:04,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:04,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:04,323 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:04,326 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:10:04,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:04,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:10:04,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:04,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:10:04,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:10:04,457 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 18:10:04,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599832926] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:10:04,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:10:04,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 18:10:04,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059953826] [2022-11-25 18:10:04,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:10:04,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:10:04,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:04,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:10:04,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:10:04,482 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 582 [2022-11-25 18:10:04,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 94 transitions, 206 flow. Second operand has 7 states, 7 states have (on average 246.28571428571428) internal successors, (1724), 7 states have internal predecessors, (1724), 0 states have call successors, (0), 0 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 18:10:04,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:04,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 582 [2022-11-25 18:10:04,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:04,976 INFO L130 PetriNetUnfolder]: 1122/2457 cut-off events. [2022-11-25 18:10:04,976 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:10:04,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4591 conditions, 2457 events. 1122/2457 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17679 event pairs, 960 based on Foata normal form. 0/1710 useless extension candidates. Maximal degree in co-relation 4579. Up to 2113 conditions per place. [2022-11-25 18:10:04,991 INFO L137 encePairwiseOnDemand]: 579/582 looper letters, 75 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2022-11-25 18:10:04,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 378 flow [2022-11-25 18:10:04,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:10:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:10:04,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1553 transitions. [2022-11-25 18:10:04,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4447308132875143 [2022-11-25 18:10:04,996 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1553 transitions. [2022-11-25 18:10:04,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1553 transitions. [2022-11-25 18:10:04,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:04,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1553 transitions. [2022-11-25 18:10:05,001 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 258.8333333333333) internal successors, (1553), 6 states have internal predecessors, (1553), 0 states have call successors, (0), 0 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 18:10:05,007 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 582.0) internal successors, (4074), 7 states have internal predecessors, (4074), 0 states have call successors, (0), 0 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 18:10:05,009 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 582.0) internal successors, (4074), 7 states have internal predecessors, (4074), 0 states have call successors, (0), 0 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 18:10:05,009 INFO L175 Difference]: Start difference. First operand has 92 places, 94 transitions, 206 flow. Second operand 6 states and 1553 transitions. [2022-11-25 18:10:05,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 378 flow [2022-11-25 18:10:05,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 97 transitions, 374 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:10:05,013 INFO L231 Difference]: Finished difference. Result has 99 places, 97 transitions, 238 flow [2022-11-25 18:10:05,013 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=238, PETRI_PLACES=99, PETRI_TRANSITIONS=97} [2022-11-25 18:10:05,014 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-11-25 18:10:05,014 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 97 transitions, 238 flow [2022-11-25 18:10:05,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 246.28571428571428) internal successors, (1724), 7 states have internal predecessors, (1724), 0 states have call successors, (0), 0 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 18:10:05,015 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:05,015 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:10:05,022 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:05,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:05,221 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:10:05,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:05,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1597951037, now seen corresponding path program 2 times [2022-11-25 18:10:05,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:05,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231073670] [2022-11-25 18:10:05,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:05,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:05,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:05,433 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 18:10:05,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:05,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231073670] [2022-11-25 18:10:05,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231073670] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:05,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561443559] [2022-11-25 18:10:05,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:10:05,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:05,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:05,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:05,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:10:05,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:10:05,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:10:05,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:10:05,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:05,557 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 18:10:05,572 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 18:10:05,572 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:10:05,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561443559] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:05,572 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:10:05,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-25 18:10:05,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36427252] [2022-11-25 18:10:05,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:05,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:10:05,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:05,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:10:05,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:10:05,689 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 582 [2022-11-25 18:10:05,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 97 transitions, 238 flow. Second operand has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 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 18:10:05,690 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:05,690 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 582 [2022-11-25 18:10:05,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:06,203 INFO L130 PetriNetUnfolder]: 1120/2376 cut-off events. [2022-11-25 18:10:06,203 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 18:10:06,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4487 conditions, 2376 events. 1120/2376 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16645 event pairs, 658 based on Foata normal form. 0/1653 useless extension candidates. Maximal degree in co-relation 4453. Up to 2051 conditions per place. [2022-11-25 18:10:06,216 INFO L137 encePairwiseOnDemand]: 578/582 looper letters, 101 selfloop transitions, 2 changer transitions 0/120 dead transitions. [2022-11-25 18:10:06,217 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 120 transitions, 490 flow [2022-11-25 18:10:06,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:10:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:10:06,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 836 transitions. [2022-11-25 18:10:06,219 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47880870561282934 [2022-11-25 18:10:06,220 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 836 transitions. [2022-11-25 18:10:06,220 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 836 transitions. [2022-11-25 18:10:06,220 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:06,221 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 836 transitions. [2022-11-25 18:10:06,223 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 278.6666666666667) internal successors, (836), 3 states have internal predecessors, (836), 0 states have call successors, (0), 0 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 18:10:06,226 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 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 18:10:06,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 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 18:10:06,228 INFO L175 Difference]: Start difference. First operand has 99 places, 97 transitions, 238 flow. Second operand 3 states and 836 transitions. [2022-11-25 18:10:06,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 120 transitions, 490 flow [2022-11-25 18:10:06,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 120 transitions, 476 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:10:06,236 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 234 flow [2022-11-25 18:10:06,237 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=234, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2022-11-25 18:10:06,238 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 2 predicate places. [2022-11-25 18:10:06,238 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 234 flow [2022-11-25 18:10:06,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.33333333333334) internal successors, (739), 3 states have internal predecessors, (739), 0 states have call successors, (0), 0 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 18:10:06,239 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:06,239 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:10:06,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:06,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:06,444 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:10:06,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:06,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1597951035, now seen corresponding path program 1 times [2022-11-25 18:10:06,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:06,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601793330] [2022-11-25 18:10:06,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:06,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:06,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:06,538 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 18:10:06,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:06,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601793330] [2022-11-25 18:10:06,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601793330] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:06,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:06,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:10:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029823672] [2022-11-25 18:10:06,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:06,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:10:06,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:06,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:10:06,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:10:06,645 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 582 [2022-11-25 18:10:06,646 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 234 flow. Second operand has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 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 18:10:06,647 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:06,647 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 582 [2022-11-25 18:10:06,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:07,049 INFO L130 PetriNetUnfolder]: 1074/2287 cut-off events. [2022-11-25 18:10:07,049 INFO L131 PetriNetUnfolder]: For 57/57 co-relation queries the response was YES. [2022-11-25 18:10:07,054 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4386 conditions, 2287 events. 1074/2287 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 16063 event pairs, 880 based on Foata normal form. 0/1626 useless extension candidates. Maximal degree in co-relation 4357. Up to 1897 conditions per place. [2022-11-25 18:10:07,064 INFO L137 encePairwiseOnDemand]: 577/582 looper letters, 96 selfloop transitions, 3 changer transitions 0/116 dead transitions. [2022-11-25 18:10:07,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 116 transitions, 470 flow [2022-11-25 18:10:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:10:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:10:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 823 transitions. [2022-11-25 18:10:07,068 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4713631156930126 [2022-11-25 18:10:07,068 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 823 transitions. [2022-11-25 18:10:07,069 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 823 transitions. [2022-11-25 18:10:07,069 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:07,070 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 823 transitions. [2022-11-25 18:10:07,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 274.3333333333333) internal successors, (823), 3 states have internal predecessors, (823), 0 states have call successors, (0), 0 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 18:10:07,076 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 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 18:10:07,077 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 582.0) internal successors, (2328), 4 states have internal predecessors, (2328), 0 states have call successors, (0), 0 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 18:10:07,078 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 234 flow. Second operand 3 states and 823 transitions. [2022-11-25 18:10:07,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 116 transitions, 470 flow [2022-11-25 18:10:07,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 116 transitions, 466 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:10:07,082 INFO L231 Difference]: Finished difference. Result has 99 places, 95 transitions, 232 flow [2022-11-25 18:10:07,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=232, PETRI_PLACES=99, PETRI_TRANSITIONS=95} [2022-11-25 18:10:07,083 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 0 predicate places. [2022-11-25 18:10:07,083 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 95 transitions, 232 flow [2022-11-25 18:10:07,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.33333333333334) internal successors, (730), 3 states have internal predecessors, (730), 0 states have call successors, (0), 0 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 18:10:07,084 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:07,084 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:07,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:10:07,085 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:10:07,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:07,086 INFO L85 PathProgramCache]: Analyzing trace with hash -857346805, now seen corresponding path program 1 times [2022-11-25 18:10:07,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:07,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209318438] [2022-11-25 18:10:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:07,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:07,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:07,179 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:10:07,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:07,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209318438] [2022-11-25 18:10:07,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209318438] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:07,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488166089] [2022-11-25 18:10:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:07,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:07,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:07,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:07,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:10:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:10:07,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:07,311 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:10:07,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:10:07,365 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:10:07,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488166089] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:10:07,367 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:10:07,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 18:10:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329381947] [2022-11-25 18:10:07,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:10:07,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:10:07,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:07,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:10:07,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:10:07,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 245 out of 582 [2022-11-25 18:10:07,409 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 95 transitions, 232 flow. Second operand has 13 states, 13 states have (on average 246.3846153846154) internal successors, (3203), 13 states have internal predecessors, (3203), 0 states have call successors, (0), 0 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 18:10:07,409 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:07,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 245 of 582 [2022-11-25 18:10:07,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:07,845 INFO L130 PetriNetUnfolder]: 1074/2289 cut-off events. [2022-11-25 18:10:07,845 INFO L131 PetriNetUnfolder]: For 101/101 co-relation queries the response was YES. [2022-11-25 18:10:07,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4430 conditions, 2289 events. 1074/2289 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15923 event pairs, 920 based on Foata normal form. 6/1667 useless extension candidates. Maximal degree in co-relation 4377. Up to 1986 conditions per place. [2022-11-25 18:10:07,860 INFO L137 encePairwiseOnDemand]: 579/582 looper letters, 73 selfloop transitions, 11 changer transitions 0/101 dead transitions. [2022-11-25 18:10:07,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 101 transitions, 436 flow [2022-11-25 18:10:07,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:10:07,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:10:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3030 transitions. [2022-11-25 18:10:07,868 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4338487972508591 [2022-11-25 18:10:07,868 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3030 transitions. [2022-11-25 18:10:07,868 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3030 transitions. [2022-11-25 18:10:07,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:07,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3030 transitions. [2022-11-25 18:10:07,876 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 252.5) internal successors, (3030), 12 states have internal predecessors, (3030), 0 states have call successors, (0), 0 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 18:10:07,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 582.0) internal successors, (7566), 13 states have internal predecessors, (7566), 0 states have call successors, (0), 0 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 18:10:07,891 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 582.0) internal successors, (7566), 13 states have internal predecessors, (7566), 0 states have call successors, (0), 0 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 18:10:07,892 INFO L175 Difference]: Start difference. First operand has 99 places, 95 transitions, 232 flow. Second operand 12 states and 3030 transitions. [2022-11-25 18:10:07,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 101 transitions, 436 flow [2022-11-25 18:10:07,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 101 transitions, 430 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:10:07,901 INFO L231 Difference]: Finished difference. Result has 114 places, 101 transitions, 310 flow [2022-11-25 18:10:07,901 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=310, PETRI_PLACES=114, PETRI_TRANSITIONS=101} [2022-11-25 18:10:07,905 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 15 predicate places. [2022-11-25 18:10:07,906 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 101 transitions, 310 flow [2022-11-25 18:10:07,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 246.3846153846154) internal successors, (3203), 13 states have internal predecessors, (3203), 0 states have call successors, (0), 0 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 18:10:07,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:07,907 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 18:10:07,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:08,113 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:10:08,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash 802719467, now seen corresponding path program 2 times [2022-11-25 18:10:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:08,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838710668] [2022-11-25 18:10:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:08,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:08,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:08,294 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 18:10:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:08,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838710668] [2022-11-25 18:10:08,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838710668] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:08,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368537016] [2022-11-25 18:10:08,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:10:08,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:08,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:08,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:08,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:10:08,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:10:08,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:10:08,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:10:08,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:08,417 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 18:10:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 18:10:08,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:10:08,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368537016] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:08,470 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:10:08,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 18:10:08,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551636016] [2022-11-25 18:10:08,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:08,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:10:08,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:08,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:10:08,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:10:08,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 582 [2022-11-25 18:10:08,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 101 transitions, 310 flow. Second operand has 4 states, 4 states have (on average 245.75) internal successors, (983), 4 states have internal predecessors, (983), 0 states have call successors, (0), 0 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 18:10:08,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:08,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 582 [2022-11-25 18:10:08,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:09,051 INFO L130 PetriNetUnfolder]: 1052/2235 cut-off events. [2022-11-25 18:10:09,052 INFO L131 PetriNetUnfolder]: For 54/54 co-relation queries the response was YES. [2022-11-25 18:10:09,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4303 conditions, 2235 events. 1052/2235 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 15509 event pairs, 588 based on Foata normal form. 0/1616 useless extension candidates. Maximal degree in co-relation 4226. Up to 1831 conditions per place. [2022-11-25 18:10:09,073 INFO L137 encePairwiseOnDemand]: 577/582 looper letters, 122 selfloop transitions, 4 changer transitions 0/143 dead transitions. [2022-11-25 18:10:09,073 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 143 transitions, 644 flow [2022-11-25 18:10:09,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:10:09,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:10:09,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1093 transitions. [2022-11-25 18:10:09,078 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4695017182130584 [2022-11-25 18:10:09,078 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1093 transitions. [2022-11-25 18:10:09,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1093 transitions. [2022-11-25 18:10:09,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:09,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1093 transitions. [2022-11-25 18:10:09,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 273.25) internal successors, (1093), 4 states have internal predecessors, (1093), 0 states have call successors, (0), 0 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 18:10:09,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 582.0) internal successors, (2910), 5 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 18:10:09,086 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 582.0) internal successors, (2910), 5 states have internal predecessors, (2910), 0 states have call successors, (0), 0 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 18:10:09,086 INFO L175 Difference]: Start difference. First operand has 114 places, 101 transitions, 310 flow. Second operand 4 states and 1093 transitions. [2022-11-25 18:10:09,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 143 transitions, 644 flow [2022-11-25 18:10:09,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 143 transitions, 596 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 18:10:09,091 INFO L231 Difference]: Finished difference. Result has 111 places, 100 transitions, 266 flow [2022-11-25 18:10:09,091 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=582, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=108, 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=4, PETRI_FLOW=266, PETRI_PLACES=111, PETRI_TRANSITIONS=100} [2022-11-25 18:10:09,094 INFO L288 CegarLoopForPetriNet]: 99 programPoint places, 12 predicate places. [2022-11-25 18:10:09,094 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 100 transitions, 266 flow [2022-11-25 18:10:09,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 245.75) internal successors, (983), 4 states have internal predecessors, (983), 0 states have call successors, (0), 0 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 18:10:09,095 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:09,095 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-25 18:10:09,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:09,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:10:09,301 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 18:10:09,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:09,301 INFO L85 PathProgramCache]: Analyzing trace with hash -885499484, now seen corresponding path program 1 times [2022-11-25 18:10:09,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:09,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093611767] [2022-11-25 18:10:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:10:09,332 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:10:09,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:10:09,378 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:10:09,378 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:10:09,379 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-11-25 18:10:09,381 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-11-25 18:10:09,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-11-25 18:10:09,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-11-25 18:10:09,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-11-25 18:10:09,382 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-11-25 18:10:09,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-11-25 18:10:09,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-11-25 18:10:09,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-11-25 18:10:09,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2022-11-25 18:10:09,383 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-11-25 18:10:09,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK (38 of 50 remaining) [2022-11-25 18:10:09,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-11-25 18:10:09,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-11-25 18:10:09,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-11-25 18:10:09,384 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr20REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-11-25 18:10:09,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 50 remaining) [2022-11-25 18:10:09,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-11-25 18:10:09,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-11-25 18:10:09,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-11-25 18:10:09,385 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_LEAK (29 of 50 remaining) [2022-11-25 18:10:09,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-11-25 18:10:09,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-11-25 18:10:09,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-11-25 18:10:09,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-11-25 18:10:09,386 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-11-25 18:10:09,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-11-25 18:10:09,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-11-25 18:10:09,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-11-25 18:10:09,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-11-25 18:10:09,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-11-25 18:10:09,387 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-11-25 18:10:09,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-11-25 18:10:09,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-11-25 18:10:09,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-11-25 18:10:09,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-11-25 18:10:09,388 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-11-25 18:10:09,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-11-25 18:10:09,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-11-25 18:10:09,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-11-25 18:10:09,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-11-25 18:10:09,389 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-11-25 18:10:09,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-11-25 18:10:09,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-11-25 18:10:09,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-11-25 18:10:09,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-11-25 18:10:09,390 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-11-25 18:10:09,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-11-25 18:10:09,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-11-25 18:10:09,391 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-11-25 18:10:09,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:10:09,392 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-11-25 18:10:09,395 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 18:10:09,395 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 18:10:09,444 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:10:09,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 376 transitions, 770 flow [2022-11-25 18:10:09,557 INFO L130 PetriNetUnfolder]: 118/738 cut-off events. [2022-11-25 18:10:09,557 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:10:09,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 738 events. 118/738 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4232 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 461. Up to 12 conditions per place. [2022-11-25 18:10:09,568 INFO L82 GeneralOperation]: Start removeDead. Operand has 321 places, 376 transitions, 770 flow [2022-11-25 18:10:09,578 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 321 places, 376 transitions, 770 flow [2022-11-25 18:10:09,579 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:10:09,579 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 321 places, 376 transitions, 770 flow [2022-11-25 18:10:09,579 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 321 places, 376 transitions, 770 flow [2022-11-25 18:10:09,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 321 places, 376 transitions, 770 flow [2022-11-25 18:10:09,693 INFO L130 PetriNetUnfolder]: 118/738 cut-off events. [2022-11-25 18:10:09,693 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 18:10:09,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 752 conditions, 738 events. 118/738 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 4232 event pairs, 0 based on Foata normal form. 0/510 useless extension candidates. Maximal degree in co-relation 461. Up to 12 conditions per place. [2022-11-25 18:10:09,735 INFO L119 LiptonReduction]: Number of co-enabled transitions 70632 [2022-11-25 18:10:17,373 INFO L134 LiptonReduction]: Checked pairs total: 147743 [2022-11-25 18:10:17,373 INFO L136 LiptonReduction]: Total number of compositions: 366 [2022-11-25 18:10:17,376 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:10:17,377 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;@7485d66a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:10:17,377 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-11-25 18:10:17,380 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-11-25 18:10:17,381 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:10:17,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:17,381 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:10:17,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-25 18:10:17,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:17,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1972120, now seen corresponding path program 1 times [2022-11-25 18:10:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:17,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054710157] [2022-11-25 18:10:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:17,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:17,404 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 18:10:17,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:17,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054710157] [2022-11-25 18:10:17,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054710157] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:17,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:17,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:10:17,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252860494] [2022-11-25 18:10:17,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:17,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:10:17,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:17,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:10:17,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:10:17,416 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 314 out of 742 [2022-11-25 18:10:17,417 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 179 transitions, 376 flow. Second operand has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 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 18:10:17,418 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:17,418 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 314 of 742 [2022-11-25 18:10:17,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:24,198 INFO L130 PetriNetUnfolder]: 49066/78144 cut-off events. [2022-11-25 18:10:24,199 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2022-11-25 18:10:24,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148696 conditions, 78144 events. 49066/78144 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 3035. Compared 680730 event pairs, 43855 based on Foata normal form. 6264/58633 useless extension candidates. Maximal degree in co-relation 52886. Up to 70420 conditions per place. [2022-11-25 18:10:24,613 INFO L137 encePairwiseOnDemand]: 685/742 looper letters, 99 selfloop transitions, 2 changer transitions 0/126 dead transitions. [2022-11-25 18:10:24,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 126 transitions, 472 flow [2022-11-25 18:10:24,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:10:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:10:24,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1098 transitions. [2022-11-25 18:10:24,617 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49326145552560646 [2022-11-25 18:10:24,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1098 transitions. [2022-11-25 18:10:24,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1098 transitions. [2022-11-25 18:10:24,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:24,618 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1098 transitions. [2022-11-25 18:10:24,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 366.0) internal successors, (1098), 3 states have internal predecessors, (1098), 0 states have call successors, (0), 0 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 18:10:24,624 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 742.0) internal successors, (2968), 4 states have internal predecessors, (2968), 0 states have call successors, (0), 0 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 18:10:24,625 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 742.0) internal successors, (2968), 4 states have internal predecessors, (2968), 0 states have call successors, (0), 0 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 18:10:24,625 INFO L175 Difference]: Start difference. First operand has 132 places, 179 transitions, 376 flow. Second operand 3 states and 1098 transitions. [2022-11-25 18:10:24,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 126 transitions, 472 flow [2022-11-25 18:10:24,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 126 transitions, 472 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:10:24,629 INFO L231 Difference]: Finished difference. Result has 123 places, 126 transitions, 280 flow [2022-11-25 18:10:24,629 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=742, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=280, PETRI_PLACES=123, PETRI_TRANSITIONS=126} [2022-11-25 18:10:24,631 INFO L288 CegarLoopForPetriNet]: 132 programPoint places, -9 predicate places. [2022-11-25 18:10:24,633 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 126 transitions, 280 flow [2022-11-25 18:10:24,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 315.0) internal successors, (945), 3 states have internal predecessors, (945), 0 states have call successors, (0), 0 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 18:10:24,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:24,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 18:10:24,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:10:24,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-25 18:10:24,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:24,635 INFO L85 PathProgramCache]: Analyzing trace with hash 61157225, now seen corresponding path program 1 times [2022-11-25 18:10:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516532998] [2022-11-25 18:10:24,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:24,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:24,663 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 18:10:24,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:24,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516532998] [2022-11-25 18:10:24,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516532998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:24,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64500731] [2022-11-25 18:10:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:24,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:24,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:24,666 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:24,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:10:24,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:24,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:10:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:24,757 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 18:10:24,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:10:24,771 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 18:10:24,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64500731] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:10:24,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:10:24,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-25 18:10:24,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939834453] [2022-11-25 18:10:24,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:10:24,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:10:24,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:24,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:10:24,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:10:24,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 742 [2022-11-25 18:10:24,798 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 126 transitions, 280 flow. Second operand has 6 states, 6 states have (on average 314.1666666666667) internal successors, (1885), 6 states have internal predecessors, (1885), 0 states have call successors, (0), 0 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 18:10:24,798 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:24,799 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 742 [2022-11-25 18:10:24,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:31,211 INFO L130 PetriNetUnfolder]: 49066/78147 cut-off events. [2022-11-25 18:10:31,211 INFO L131 PetriNetUnfolder]: For 171/171 co-relation queries the response was YES. [2022-11-25 18:10:31,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148712 conditions, 78147 events. 49066/78147 cut-off events. For 171/171 co-relation queries the response was YES. Maximal size of possible extension queue 3035. Compared 681032 event pairs, 43855 based on Foata normal form. 0/52372 useless extension candidates. Maximal degree in co-relation 148699. Up to 70420 conditions per place. [2022-11-25 18:10:31,831 INFO L137 encePairwiseOnDemand]: 739/742 looper letters, 99 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2022-11-25 18:10:31,832 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 129 transitions, 500 flow [2022-11-25 18:10:31,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:10:31,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:10:31,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1985 transitions. [2022-11-25 18:10:31,838 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4458670260557053 [2022-11-25 18:10:31,838 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1985 transitions. [2022-11-25 18:10:31,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1985 transitions. [2022-11-25 18:10:31,839 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:31,839 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1985 transitions. [2022-11-25 18:10:31,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 330.8333333333333) internal successors, (1985), 6 states have internal predecessors, (1985), 0 states have call successors, (0), 0 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 18:10:31,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 742.0) internal successors, (5194), 7 states have internal predecessors, (5194), 0 states have call successors, (0), 0 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 18:10:31,867 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 742.0) internal successors, (5194), 7 states have internal predecessors, (5194), 0 states have call successors, (0), 0 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 18:10:31,867 INFO L175 Difference]: Start difference. First operand has 123 places, 126 transitions, 280 flow. Second operand 6 states and 1985 transitions. [2022-11-25 18:10:31,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 129 transitions, 500 flow [2022-11-25 18:10:31,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 129 transitions, 496 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:10:31,871 INFO L231 Difference]: Finished difference. Result has 130 places, 129 transitions, 312 flow [2022-11-25 18:10:31,871 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=742, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=312, PETRI_PLACES=130, PETRI_TRANSITIONS=129} [2022-11-25 18:10:31,873 INFO L288 CegarLoopForPetriNet]: 132 programPoint places, -2 predicate places. [2022-11-25 18:10:31,873 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 129 transitions, 312 flow [2022-11-25 18:10:31,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 314.1666666666667) internal successors, (1885), 6 states have internal predecessors, (1885), 0 states have call successors, (0), 0 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 18:10:31,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:31,874 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:10:31,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:32,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:32,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-25 18:10:32,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:32,080 INFO L85 PathProgramCache]: Analyzing trace with hash 890172502, now seen corresponding path program 2 times [2022-11-25 18:10:32,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:32,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889275290] [2022-11-25 18:10:32,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:32,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:32,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:32,116 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 18:10:32,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:32,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889275290] [2022-11-25 18:10:32,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889275290] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:32,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:32,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:10:32,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831769436] [2022-11-25 18:10:32,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:32,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:10:32,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:32,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:10:32,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:10:32,219 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 310 out of 742 [2022-11-25 18:10:32,220 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 129 transitions, 312 flow. Second operand has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 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 18:10:32,221 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:32,221 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 310 of 742 [2022-11-25 18:10:32,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:38,598 INFO L130 PetriNetUnfolder]: 46991/74653 cut-off events. [2022-11-25 18:10:38,598 INFO L131 PetriNetUnfolder]: For 173/173 co-relation queries the response was YES. [2022-11-25 18:10:38,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142329 conditions, 74653 events. 46991/74653 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 2929. Compared 648029 event pairs, 40188 based on Foata normal form. 0/50484 useless extension candidates. Maximal degree in co-relation 142294. Up to 64569 conditions per place. [2022-11-25 18:10:38,932 INFO L137 encePairwiseOnDemand]: 737/742 looper letters, 142 selfloop transitions, 3 changer transitions 0/170 dead transitions. [2022-11-25 18:10:38,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 170 transitions, 684 flow [2022-11-25 18:10:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:10:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:10:38,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1073 transitions. [2022-11-25 18:10:38,936 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48203054806828394 [2022-11-25 18:10:38,936 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1073 transitions. [2022-11-25 18:10:38,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1073 transitions. [2022-11-25 18:10:38,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:38,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1073 transitions. [2022-11-25 18:10:38,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 357.6666666666667) internal successors, (1073), 3 states have internal predecessors, (1073), 0 states have call successors, (0), 0 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 18:10:38,944 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 742.0) internal successors, (2968), 4 states have internal predecessors, (2968), 0 states have call successors, (0), 0 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 18:10:38,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 742.0) internal successors, (2968), 4 states have internal predecessors, (2968), 0 states have call successors, (0), 0 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 18:10:38,945 INFO L175 Difference]: Start difference. First operand has 130 places, 129 transitions, 312 flow. Second operand 3 states and 1073 transitions. [2022-11-25 18:10:38,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 170 transitions, 684 flow [2022-11-25 18:10:38,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 170 transitions, 670 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 18:10:38,949 INFO L231 Difference]: Finished difference. Result has 129 places, 127 transitions, 300 flow [2022-11-25 18:10:38,950 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=742, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=129, PETRI_TRANSITIONS=127} [2022-11-25 18:10:38,950 INFO L288 CegarLoopForPetriNet]: 132 programPoint places, -3 predicate places. [2022-11-25 18:10:38,950 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 127 transitions, 300 flow [2022-11-25 18:10:38,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 311.3333333333333) internal successors, (934), 3 states have internal predecessors, (934), 0 states have call successors, (0), 0 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 18:10:38,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:38,951 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 18:10:38,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:10:38,951 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-25 18:10:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:38,952 INFO L85 PathProgramCache]: Analyzing trace with hash 890172504, now seen corresponding path program 1 times [2022-11-25 18:10:38,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:38,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277154435] [2022-11-25 18:10:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:38,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:39,020 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 18:10:39,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277154435] [2022-11-25 18:10:39,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277154435] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:10:39,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921251603] [2022-11-25 18:10:39,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:39,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:10:39,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:10:39,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:10:39,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:10:39,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:39,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:10:39,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:10:39,142 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 18:10:39,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:10:39,190 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 18:10:39,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921251603] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:10:39,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:10:39,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2022-11-25 18:10:39,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610893029] [2022-11-25 18:10:39,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:10:39,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:10:39,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:39,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:10:39,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:10:39,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 742 [2022-11-25 18:10:39,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 127 transitions, 300 flow. Second operand has 12 states, 12 states have (on average 314.0833333333333) internal successors, (3769), 12 states have internal predecessors, (3769), 0 states have call successors, (0), 0 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 18:10:39,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:39,247 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 742 [2022-11-25 18:10:39,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:10:45,957 INFO L130 PetriNetUnfolder]: 47073/74953 cut-off events. [2022-11-25 18:10:45,957 INFO L131 PetriNetUnfolder]: For 683/683 co-relation queries the response was YES. [2022-11-25 18:10:46,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 143654 conditions, 74953 events. 47073/74953 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 2903. Compared 649842 event pairs, 42032 based on Foata normal form. 6/51337 useless extension candidates. Maximal degree in co-relation 143601. Up to 67518 conditions per place. [2022-11-25 18:10:46,542 INFO L137 encePairwiseOnDemand]: 739/742 looper letters, 97 selfloop transitions, 11 changer transitions 0/133 dead transitions. [2022-11-25 18:10:46,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 133 transitions, 552 flow [2022-11-25 18:10:46,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:10:46,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:10:46,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3870 transitions. [2022-11-25 18:10:46,552 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43463611859838275 [2022-11-25 18:10:46,552 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3870 transitions. [2022-11-25 18:10:46,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3870 transitions. [2022-11-25 18:10:46,555 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:10:46,555 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3870 transitions. [2022-11-25 18:10:46,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 322.5) internal successors, (3870), 12 states have internal predecessors, (3870), 0 states have call successors, (0), 0 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 18:10:46,575 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 742.0) internal successors, (9646), 13 states have internal predecessors, (9646), 0 states have call successors, (0), 0 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 18:10:46,578 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 742.0) internal successors, (9646), 13 states have internal predecessors, (9646), 0 states have call successors, (0), 0 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 18:10:46,578 INFO L175 Difference]: Start difference. First operand has 129 places, 127 transitions, 300 flow. Second operand 12 states and 3870 transitions. [2022-11-25 18:10:46,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 133 transitions, 552 flow [2022-11-25 18:10:46,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 133 transitions, 546 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:10:46,598 INFO L231 Difference]: Finished difference. Result has 144 places, 133 transitions, 378 flow [2022-11-25 18:10:46,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=742, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=378, PETRI_PLACES=144, PETRI_TRANSITIONS=133} [2022-11-25 18:10:46,599 INFO L288 CegarLoopForPetriNet]: 132 programPoint places, 12 predicate places. [2022-11-25 18:10:46,599 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 133 transitions, 378 flow [2022-11-25 18:10:46,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 314.0833333333333) internal successors, (3769), 12 states have internal predecessors, (3769), 0 states have call successors, (0), 0 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 18:10:46,600 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:10:46,600 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-11-25 18:10:46,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:10:46,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9dfdf7c0-faf6-492e-aff7-1834e37c5cfe/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:10:46,805 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-25 18:10:46,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:10:46,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1974864760, now seen corresponding path program 2 times [2022-11-25 18:10:46,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:10:46,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557723767] [2022-11-25 18:10:46,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:10:46,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:10:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:10:46,905 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 18:10:46,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:10:46,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557723767] [2022-11-25 18:10:46,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557723767] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:10:46,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:10:46,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:10:46,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492064965] [2022-11-25 18:10:46,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:10:46,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:10:46,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:10:46,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:10:46,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:10:47,014 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 313 out of 742 [2022-11-25 18:10:47,016 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 133 transitions, 378 flow. Second operand has 3 states, 3 states have (on average 314.3333333333333) internal successors, (943), 3 states have internal predecessors, (943), 0 states have call successors, (0), 0 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 18:10:47,016 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:10:47,016 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 313 of 742 [2022-11-25 18:10:47,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand