./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.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_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/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_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/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_35f118ac-207b-44d4-af3b-ece8025c79dd/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 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 --- 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 17:15:02,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:15:02,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:15:02,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:15:02,791 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:15:02,795 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:15:02,798 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:15:02,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:15:02,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:15:02,807 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:15:02,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:15:02,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:15:02,810 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:15:02,811 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:15:02,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:15:02,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:15:02,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:15:02,816 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:15:02,818 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:15:02,821 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:15:02,824 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:15:02,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:15:02,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:15:02,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:15:02,842 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:15:02,844 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:15:02,844 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:15:02,845 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:15:02,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:15:02,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:15:02,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:15:02,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:15:02,852 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:15:02,853 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:15:02,854 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:15:02,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:15:02,855 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:15:02,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:15:02,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:15:02,857 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:15:02,859 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:15:02,860 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:15:02,901 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:15:02,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:15:02,902 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:15:02,902 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:15:02,903 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:15:02,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:15:02,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:15:02,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:15:02,905 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:15:02,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:15:02,906 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:15:02,907 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:15:02,907 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:15:02,907 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:15:02,907 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:15:02,908 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:15:02,908 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:15:02,908 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:15:02,908 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:15:02,909 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:15:02,909 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:15:02,909 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:15:02,909 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:15:02,910 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:15:02,910 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:15:02,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:15:02,910 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:15:02,911 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:15:02,911 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:15:02,911 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:15:02,912 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:15:02,912 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:15:02,912 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:15:02,913 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_35f118ac-207b-44d4-af3b-ece8025c79dd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cc9afdbf7eeaac0d52aedc8a0325c076240e2f45d0a3fe91081372b30b32137 [2022-11-25 17:15:03,252 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:15:03,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:15:03,297 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:15:03,298 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:15:03,298 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:15:03,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-11-25 17:15:06,569 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:15:06,869 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:15:06,876 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i [2022-11-25 17:15:06,891 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/data/c812a9b9f/a024b356334b44b1be15f1c9f0163281/FLAGc193c3356 [2022-11-25 17:15:06,905 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/data/c812a9b9f/a024b356334b44b1be15f1c9f0163281 [2022-11-25 17:15:06,907 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:15:06,909 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:15:06,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:15:06,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:15:06,919 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:15:06,920 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:15:06" (1/1) ... [2022-11-25 17:15:06,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63446a69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:06, skipping insertion in model container [2022-11-25 17:15:06,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:15:06" (1/1) ... [2022-11-25 17:15:06,931 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:15:07,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:15:07,475 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_35f118ac-207b-44d4-af3b-ece8025c79dd/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i[31040,31053] [2022-11-25 17:15:07,492 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:15:07,508 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:15:07,578 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_35f118ac-207b-44d4-af3b-ece8025c79dd/sv-benchmarks/c/pthread-ext/25_stack_longest-1.i[31040,31053] [2022-11-25 17:15:07,595 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:15:07,642 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:15:07,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07 WrapperNode [2022-11-25 17:15:07,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:15:07,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:15:07,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:15:07,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:15:07,652 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,724 INFO L138 Inliner]: procedures = 177, calls = 34, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 174 [2022-11-25 17:15:07,725 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:15:07,726 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:15:07,726 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:15:07,726 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:15:07,739 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,739 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,766 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,790 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,792 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:15:07,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:15:07,807 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:15:07,807 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:15:07,808 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (1/1) ... [2022-11-25 17:15:07,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:15:07,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:15:07,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:15:07,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35f118ac-207b-44d4-af3b-ece8025c79dd/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-25 17:15:07,905 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-25 17:15:07,905 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:15:07,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:15:07,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:15:07,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:15:07,907 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:15:07,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:15:07,907 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:15:07,909 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 17:15:08,137 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:15:08,153 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:15:08,683 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:15:09,133 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:15:09,133 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 17:15:09,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:15:09 BoogieIcfgContainer [2022-11-25 17:15:09,136 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:15:09,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:15:09,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:15:09,143 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:15:09,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:15:06" (1/3) ... [2022-11-25 17:15:09,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8e18e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:15:09, skipping insertion in model container [2022-11-25 17:15:09,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:15:07" (2/3) ... [2022-11-25 17:15:09,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d8e18e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:15:09, skipping insertion in model container [2022-11-25 17:15:09,145 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:15:09" (3/3) ... [2022-11-25 17:15:09,146 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-1.i [2022-11-25 17:15:09,167 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:15:09,167 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2022-11-25 17:15:09,168 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:15:09,263 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:15:09,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 293 flow [2022-11-25 17:15:09,368 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-11-25 17:15:09,368 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:09,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 8/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-11-25 17:15:09,377 INFO L82 GeneralOperation]: Start removeDead. Operand has 140 places, 144 transitions, 293 flow [2022-11-25 17:15:09,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 144 transitions, 293 flow [2022-11-25 17:15:09,386 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:15:09,401 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 140 places, 144 transitions, 293 flow [2022-11-25 17:15:09,404 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 140 places, 144 transitions, 293 flow [2022-11-25 17:15:09,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 140 places, 144 transitions, 293 flow [2022-11-25 17:15:09,503 INFO L130 PetriNetUnfolder]: 8/160 cut-off events. [2022-11-25 17:15:09,504 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:09,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 165 conditions, 160 events. 8/160 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 287 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 118. Up to 4 conditions per place. [2022-11-25 17:15:09,512 INFO L119 LiptonReduction]: Number of co-enabled transitions 3800 [2022-11-25 17:15:20,910 INFO L134 LiptonReduction]: Checked pairs total: 4752 [2022-11-25 17:15:20,911 INFO L136 LiptonReduction]: Total number of compositions: 199 [2022-11-25 17:15:20,936 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:15:20,943 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;@577a13e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:15:20,943 INFO L358 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2022-11-25 17:15:20,946 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 17:15:20,946 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:20,946 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:20,947 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:15:20,949 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-25 17:15:20,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:20,956 INFO L85 PathProgramCache]: Analyzing trace with hash 31668, now seen corresponding path program 1 times [2022-11-25 17:15:20,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:20,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725276504] [2022-11-25 17:15:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:20,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:21,188 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 17:15:21,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:21,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725276504] [2022-11-25 17:15:21,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725276504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:21,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:21,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:15:21,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436528083] [2022-11-25 17:15:21,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:21,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:21,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:21,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:21,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:21,293 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 343 [2022-11-25 17:15:21,296 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 52 transitions, 109 flow. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 17:15:21,297 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:21,297 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 343 [2022-11-25 17:15:21,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:21,393 INFO L130 PetriNetUnfolder]: 63/139 cut-off events. [2022-11-25 17:15:21,393 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:21,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 139 events. 63/139 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 470 event pairs, 51 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 268. Up to 138 conditions per place. [2022-11-25 17:15:21,395 INFO L137 encePairwiseOnDemand]: 316/343 looper letters, 24 selfloop transitions, 1 changer transitions 0/26 dead transitions. [2022-11-25 17:15:21,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 26 transitions, 107 flow [2022-11-25 17:15:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:21,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:21,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 339 transitions. [2022-11-25 17:15:21,410 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3294460641399417 [2022-11-25 17:15:21,411 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 339 transitions. [2022-11-25 17:15:21,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 339 transitions. [2022-11-25 17:15:21,413 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:21,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 339 transitions. [2022-11-25 17:15:21,418 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 113.0) internal successors, (339), 3 states have internal predecessors, (339), 0 states have call successors, (0), 0 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 17:15:21,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:21,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:21,427 INFO L175 Difference]: Start difference. First operand has 51 places, 52 transitions, 109 flow. Second operand 3 states and 339 transitions. [2022-11-25 17:15:21,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 26 transitions, 107 flow [2022-11-25 17:15:21,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 107 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:15:21,432 INFO L231 Difference]: Finished difference. Result has 28 places, 26 transitions, 59 flow [2022-11-25 17:15:21,434 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=59, PETRI_PLACES=28, PETRI_TRANSITIONS=26} [2022-11-25 17:15:21,437 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -23 predicate places. [2022-11-25 17:15:21,437 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 26 transitions, 59 flow [2022-11-25 17:15:21,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 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 17:15:21,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:21,438 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:15:21,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:15:21,439 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-25 17:15:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:21,439 INFO L85 PathProgramCache]: Analyzing trace with hash 31667, now seen corresponding path program 1 times [2022-11-25 17:15:21,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:21,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199463027] [2022-11-25 17:15:21,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:21,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:21,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:21,545 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 17:15:21,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:21,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199463027] [2022-11-25 17:15:21,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199463027] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:21,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:21,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:15:21,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372337576] [2022-11-25 17:15:21,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:21,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:21,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:21,589 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 343 [2022-11-25 17:15:21,589 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 26 transitions, 59 flow. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 17:15:21,590 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:21,590 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 343 [2022-11-25 17:15:21,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:21,664 INFO L130 PetriNetUnfolder]: 43/100 cut-off events. [2022-11-25 17:15:21,665 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:21,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207 conditions, 100 events. 43/100 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 304 event pairs, 34 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 200. Up to 99 conditions per place. [2022-11-25 17:15:21,666 INFO L137 encePairwiseOnDemand]: 341/343 looper letters, 23 selfloop transitions, 1 changer transitions 0/25 dead transitions. [2022-11-25 17:15:21,666 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 105 flow [2022-11-25 17:15:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:21,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:21,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 319 transitions. [2022-11-25 17:15:21,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3100097181729835 [2022-11-25 17:15:21,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 319 transitions. [2022-11-25 17:15:21,680 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 319 transitions. [2022-11-25 17:15:21,680 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:21,680 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 319 transitions. [2022-11-25 17:15:21,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 17:15:21,689 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:21,690 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:21,690 INFO L175 Difference]: Start difference. First operand has 28 places, 26 transitions, 59 flow. Second operand 3 states and 319 transitions. [2022-11-25 17:15:21,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 105 flow [2022-11-25 17:15:21,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 25 transitions, 104 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:21,692 INFO L231 Difference]: Finished difference. Result has 28 places, 25 transitions, 58 flow [2022-11-25 17:15:21,693 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=58, PETRI_PLACES=28, PETRI_TRANSITIONS=25} [2022-11-25 17:15:21,696 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -23 predicate places. [2022-11-25 17:15:21,696 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 25 transitions, 58 flow [2022-11-25 17:15:21,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 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 17:15:21,697 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:21,698 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:15:21,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:15:21,702 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-25 17:15:21,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:21,703 INFO L85 PathProgramCache]: Analyzing trace with hash 30455788, now seen corresponding path program 1 times [2022-11-25 17:15:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:21,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798607013] [2022-11-25 17:15:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:21,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:21,927 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 17:15:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:21,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798607013] [2022-11-25 17:15:21,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798607013] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:21,928 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:21,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:21,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44652986] [2022-11-25 17:15:21,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:21,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:15:21,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:21,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:15:21,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:15:21,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 343 [2022-11-25 17:15:21,998 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 25 transitions, 58 flow. Second operand has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 17:15:21,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:21,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 343 [2022-11-25 17:15:21,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:22,087 INFO L130 PetriNetUnfolder]: 41/95 cut-off events. [2022-11-25 17:15:22,087 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:22,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 95 events. 41/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 282 event pairs, 32 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 190. Up to 94 conditions per place. [2022-11-25 17:15:22,089 INFO L137 encePairwiseOnDemand]: 341/343 looper letters, 22 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2022-11-25 17:15:22,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 24 transitions, 102 flow [2022-11-25 17:15:22,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:22,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 309 transitions. [2022-11-25 17:15:22,091 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.30029154518950435 [2022-11-25 17:15:22,091 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 309 transitions. [2022-11-25 17:15:22,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 309 transitions. [2022-11-25 17:15:22,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:22,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 309 transitions. [2022-11-25 17:15:22,093 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 103.0) internal successors, (309), 3 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 17:15:22,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:22,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:22,097 INFO L175 Difference]: Start difference. First operand has 28 places, 25 transitions, 58 flow. Second operand 3 states and 309 transitions. [2022-11-25 17:15:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 24 transitions, 102 flow [2022-11-25 17:15:22,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 24 transitions, 101 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:22,098 INFO L231 Difference]: Finished difference. Result has 28 places, 24 transitions, 57 flow [2022-11-25 17:15:22,098 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, PETRI_DIFFERENCE_MINUEND_FLOW=55, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=28, PETRI_TRANSITIONS=24} [2022-11-25 17:15:22,099 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -23 predicate places. [2022-11-25 17:15:22,099 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 24 transitions, 57 flow [2022-11-25 17:15:22,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 96.0) internal successors, (384), 4 states have internal predecessors, (384), 0 states have call successors, (0), 0 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 17:15:22,100 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:22,100 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:15:22,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:15:22,101 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-25 17:15:22,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:22,101 INFO L85 PathProgramCache]: Analyzing trace with hash 30455789, now seen corresponding path program 1 times [2022-11-25 17:15:22,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:22,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176667085] [2022-11-25 17:15:22,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:22,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:22,264 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 17:15:22,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:22,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176667085] [2022-11-25 17:15:22,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176667085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:22,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:22,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:22,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659606859] [2022-11-25 17:15:22,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:22,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:15:22,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:22,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:15:22,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:15:22,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 343 [2022-11-25 17:15:22,301 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 24 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 17:15:22,301 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:22,301 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 343 [2022-11-25 17:15:22,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:22,369 INFO L130 PetriNetUnfolder]: 39/90 cut-off events. [2022-11-25 17:15:22,370 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:22,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 90 events. 39/90 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 262 event pairs, 30 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 180. Up to 89 conditions per place. [2022-11-25 17:15:22,371 INFO L137 encePairwiseOnDemand]: 341/343 looper letters, 21 selfloop transitions, 1 changer transitions 0/23 dead transitions. [2022-11-25 17:15:22,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 99 flow [2022-11-25 17:15:22,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:22,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 320 transitions. [2022-11-25 17:15:22,392 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3109815354713314 [2022-11-25 17:15:22,396 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 320 transitions. [2022-11-25 17:15:22,397 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 320 transitions. [2022-11-25 17:15:22,397 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:22,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 320 transitions. [2022-11-25 17:15:22,399 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 0 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 17:15:22,401 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:22,404 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 343.0) internal successors, (1372), 4 states have internal predecessors, (1372), 0 states have call successors, (0), 0 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 17:15:22,404 INFO L175 Difference]: Start difference. First operand has 28 places, 24 transitions, 57 flow. Second operand 3 states and 320 transitions. [2022-11-25 17:15:22,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 99 flow [2022-11-25 17:15:22,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:22,413 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 56 flow [2022-11-25 17:15:22,413 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=343, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=56, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2022-11-25 17:15:22,416 INFO L288 CegarLoopForPetriNet]: 51 programPoint places, -23 predicate places. [2022-11-25 17:15:22,416 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 56 flow [2022-11-25 17:15:22,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.0) internal successors, (400), 4 states have internal predecessors, (400), 0 states have call successors, (0), 0 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 17:15:22,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:22,417 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:15:22,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:15:22,417 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 63 more)] === [2022-11-25 17:15:22,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash -796727777, now seen corresponding path program 1 times [2022-11-25 17:15:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:22,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330036788] [2022-11-25 17:15:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:22,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:15:22,449 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:15:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:15:22,502 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:15:22,503 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:15:22,504 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (65 of 66 remaining) [2022-11-25 17:15:22,507 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (64 of 66 remaining) [2022-11-25 17:15:22,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 66 remaining) [2022-11-25 17:15:22,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 66 remaining) [2022-11-25 17:15:22,508 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 66 remaining) [2022-11-25 17:15:22,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 66 remaining) [2022-11-25 17:15:22,509 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 66 remaining) [2022-11-25 17:15:22,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 66 remaining) [2022-11-25 17:15:22,510 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 66 remaining) [2022-11-25 17:15:22,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 66 remaining) [2022-11-25 17:15:22,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 66 remaining) [2022-11-25 17:15:22,511 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 66 remaining) [2022-11-25 17:15:22,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 66 remaining) [2022-11-25 17:15:22,517 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 66 remaining) [2022-11-25 17:15:22,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 66 remaining) [2022-11-25 17:15:22,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 66 remaining) [2022-11-25 17:15:22,519 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 66 remaining) [2022-11-25 17:15:22,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 66 remaining) [2022-11-25 17:15:22,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 66 remaining) [2022-11-25 17:15:22,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 66 remaining) [2022-11-25 17:15:22,520 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 66 remaining) [2022-11-25 17:15:22,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (44 of 66 remaining) [2022-11-25 17:15:22,521 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 66 remaining) [2022-11-25 17:15:22,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 66 remaining) [2022-11-25 17:15:22,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 66 remaining) [2022-11-25 17:15:22,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 66 remaining) [2022-11-25 17:15:22,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (39 of 66 remaining) [2022-11-25 17:15:22,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (38 of 66 remaining) [2022-11-25 17:15:22,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 66 remaining) [2022-11-25 17:15:22,524 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 66 remaining) [2022-11-25 17:15:22,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 66 remaining) [2022-11-25 17:15:22,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 66 remaining) [2022-11-25 17:15:22,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (33 of 66 remaining) [2022-11-25 17:15:22,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 66 remaining) [2022-11-25 17:15:22,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 66 remaining) [2022-11-25 17:15:22,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 66 remaining) [2022-11-25 17:15:22,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 66 remaining) [2022-11-25 17:15:22,526 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 66 remaining) [2022-11-25 17:15:22,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 66 remaining) [2022-11-25 17:15:22,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 66 remaining) [2022-11-25 17:15:22,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 66 remaining) [2022-11-25 17:15:22,527 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 66 remaining) [2022-11-25 17:15:22,528 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 66 remaining) [2022-11-25 17:15:22,529 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 66 remaining) [2022-11-25 17:15:22,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 66 remaining) [2022-11-25 17:15:22,537 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 66 remaining) [2022-11-25 17:15:22,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 66 remaining) [2022-11-25 17:15:22,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 66 remaining) [2022-11-25 17:15:22,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 66 remaining) [2022-11-25 17:15:22,538 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 66 remaining) [2022-11-25 17:15:22,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 66 remaining) [2022-11-25 17:15:22,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 66 remaining) [2022-11-25 17:15:22,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 66 remaining) [2022-11-25 17:15:22,539 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 66 remaining) [2022-11-25 17:15:22,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 66 remaining) [2022-11-25 17:15:22,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 66 remaining) [2022-11-25 17:15:22,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 66 remaining) [2022-11-25 17:15:22,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 66 remaining) [2022-11-25 17:15:22,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 66 remaining) [2022-11-25 17:15:22,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 66 remaining) [2022-11-25 17:15:22,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 66 remaining) [2022-11-25 17:15:22,541 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 66 remaining) [2022-11-25 17:15:22,542 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 66 remaining) [2022-11-25 17:15:22,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 66 remaining) [2022-11-25 17:15:22,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 66 remaining) [2022-11-25 17:15:22,543 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 66 remaining) [2022-11-25 17:15:22,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:15:22,544 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 17:15:22,550 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:15:22,551 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:15:22,655 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:15:22,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 502 flow [2022-11-25 17:15:22,765 INFO L130 PetriNetUnfolder]: 15/279 cut-off events. [2022-11-25 17:15:22,765 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:15:22,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 279 events. 15/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-11-25 17:15:22,772 INFO L82 GeneralOperation]: Start removeDead. Operand has 237 places, 245 transitions, 502 flow [2022-11-25 17:15:22,777 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 237 places, 245 transitions, 502 flow [2022-11-25 17:15:22,778 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:15:22,778 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 237 places, 245 transitions, 502 flow [2022-11-25 17:15:22,778 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 237 places, 245 transitions, 502 flow [2022-11-25 17:15:22,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 237 places, 245 transitions, 502 flow [2022-11-25 17:15:22,839 INFO L130 PetriNetUnfolder]: 15/279 cut-off events. [2022-11-25 17:15:22,839 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 17:15:22,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 279 events. 15/279 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 797 event pairs, 0 based on Foata normal form. 0/190 useless extension candidates. Maximal degree in co-relation 218. Up to 6 conditions per place. [2022-11-25 17:15:22,860 INFO L119 LiptonReduction]: Number of co-enabled transitions 27800 [2022-11-25 17:15:37,881 INFO L134 LiptonReduction]: Checked pairs total: 72450 [2022-11-25 17:15:37,882 INFO L136 LiptonReduction]: Total number of compositions: 308 [2022-11-25 17:15:37,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:15:37,897 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;@577a13e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:15:37,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 97 error locations. [2022-11-25 17:15:37,901 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 17:15:37,903 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:15:37,903 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:37,903 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:15:37,904 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:37,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash 52783, now seen corresponding path program 1 times [2022-11-25 17:15:37,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:37,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972490620] [2022-11-25 17:15:37,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:37,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:37,957 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 17:15:37,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:37,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972490620] [2022-11-25 17:15:37,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972490620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:37,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:37,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:15:37,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655372229] [2022-11-25 17:15:37,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:38,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 157 out of 553 [2022-11-25 17:15:38,009 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 252 flow. Second operand has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 17:15:38,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:38,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 157 of 553 [2022-11-25 17:15:38,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:39,911 INFO L130 PetriNetUnfolder]: 5507/9169 cut-off events. [2022-11-25 17:15:39,912 INFO L131 PetriNetUnfolder]: For 106/106 co-relation queries the response was YES. [2022-11-25 17:15:39,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17811 conditions, 9169 events. 5507/9169 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 722. Compared 71636 event pairs, 4865 based on Foata normal form. 0/4470 useless extension candidates. Maximal degree in co-relation 11411. Up to 8516 conditions per place. [2022-11-25 17:15:39,995 INFO L137 encePairwiseOnDemand]: 519/553 looper letters, 71 selfloop transitions, 1 changer transitions 0/87 dead transitions. [2022-11-25 17:15:39,996 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 87 transitions, 330 flow [2022-11-25 17:15:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:39,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 576 transitions. [2022-11-25 17:15:40,000 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3471971066907776 [2022-11-25 17:15:40,000 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 576 transitions. [2022-11-25 17:15:40,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 576 transitions. [2022-11-25 17:15:40,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:40,001 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 576 transitions. [2022-11-25 17:15:40,003 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 192.0) internal successors, (576), 3 states have internal predecessors, (576), 0 states have call successors, (0), 0 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 17:15:40,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:40,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:40,010 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 252 flow. Second operand 3 states and 576 transitions. [2022-11-25 17:15:40,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 87 transitions, 330 flow [2022-11-25 17:15:40,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 87 transitions, 328 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-11-25 17:15:40,016 INFO L231 Difference]: Finished difference. Result has 86 places, 87 transitions, 186 flow [2022-11-25 17:15:40,016 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=86, PETRI_TRANSITIONS=87} [2022-11-25 17:15:40,020 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -29 predicate places. [2022-11-25 17:15:40,020 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 87 transitions, 186 flow [2022-11-25 17:15:40,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 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 17:15:40,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:40,021 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:15:40,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:15:40,021 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:40,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash 52785, now seen corresponding path program 1 times [2022-11-25 17:15:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:40,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652721961] [2022-11-25 17:15:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:40,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:40,102 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 17:15:40,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:40,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652721961] [2022-11-25 17:15:40,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652721961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:40,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:40,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:15:40,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578624558] [2022-11-25 17:15:40,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:40,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:40,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:40,130 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 159 out of 553 [2022-11-25 17:15:40,131 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 87 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 17:15:40,131 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:40,131 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 159 of 553 [2022-11-25 17:15:40,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:41,245 INFO L130 PetriNetUnfolder]: 3341/5795 cut-off events. [2022-11-25 17:15:41,246 INFO L131 PetriNetUnfolder]: For 94/94 co-relation queries the response was YES. [2022-11-25 17:15:41,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11258 conditions, 5795 events. 3341/5795 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 42806 event pairs, 2913 based on Foata normal form. 0/3327 useless extension candidates. Maximal degree in co-relation 11250. Up to 5347 conditions per place. [2022-11-25 17:15:41,295 INFO L137 encePairwiseOnDemand]: 551/553 looper letters, 70 selfloop transitions, 1 changer transitions 0/86 dead transitions. [2022-11-25 17:15:41,295 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 326 flow [2022-11-25 17:15:41,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:41,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:41,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 549 transitions. [2022-11-25 17:15:41,298 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3309222423146474 [2022-11-25 17:15:41,299 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 549 transitions. [2022-11-25 17:15:41,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 549 transitions. [2022-11-25 17:15:41,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:41,300 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 549 transitions. [2022-11-25 17:15:41,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 17:15:41,305 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:41,307 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:41,308 INFO L175 Difference]: Start difference. First operand has 86 places, 87 transitions, 186 flow. Second operand 3 states and 549 transitions. [2022-11-25 17:15:41,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 326 flow [2022-11-25 17:15:41,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 86 transitions, 325 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:41,314 INFO L231 Difference]: Finished difference. Result has 86 places, 86 transitions, 185 flow [2022-11-25 17:15:41,314 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=183, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=185, PETRI_PLACES=86, PETRI_TRANSITIONS=86} [2022-11-25 17:15:41,316 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -29 predicate places. [2022-11-25 17:15:41,317 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 86 transitions, 185 flow [2022-11-25 17:15:41,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.66666666666666) internal successors, (479), 3 states have internal predecessors, (479), 0 states have call successors, (0), 0 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 17:15:41,317 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:41,317 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:15:41,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:15:41,318 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:41,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash 50767643, now seen corresponding path program 1 times [2022-11-25 17:15:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:41,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896872829] [2022-11-25 17:15:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:41,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:41,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:41,474 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 17:15:41,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:41,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896872829] [2022-11-25 17:15:41,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896872829] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:41,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:41,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:41,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608296866] [2022-11-25 17:15:41,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:41,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:15:41,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:15:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:15:41,558 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 553 [2022-11-25 17:15:41,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 86 transitions, 185 flow. Second operand has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 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 17:15:41,560 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:41,560 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 553 [2022-11-25 17:15:41,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:42,494 INFO L130 PetriNetUnfolder]: 2951/5123 cut-off events. [2022-11-25 17:15:42,494 INFO L131 PetriNetUnfolder]: For 88/88 co-relation queries the response was YES. [2022-11-25 17:15:42,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9945 conditions, 5123 events. 2951/5123 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 37122 event pairs, 2551 based on Foata normal form. 0/3070 useless extension candidates. Maximal degree in co-relation 9936. Up to 4713 conditions per place. [2022-11-25 17:15:42,532 INFO L137 encePairwiseOnDemand]: 548/553 looper letters, 66 selfloop transitions, 1 changer transitions 0/82 dead transitions. [2022-11-25 17:15:42,532 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 82 transitions, 311 flow [2022-11-25 17:15:42,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:42,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:42,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2022-11-25 17:15:42,536 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32489451476793246 [2022-11-25 17:15:42,536 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2022-11-25 17:15:42,536 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2022-11-25 17:15:42,537 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:42,537 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2022-11-25 17:15:42,539 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 17:15:42,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:42,544 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:42,544 INFO L175 Difference]: Start difference. First operand has 86 places, 86 transitions, 185 flow. Second operand 3 states and 539 transitions. [2022-11-25 17:15:42,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 82 transitions, 311 flow [2022-11-25 17:15:42,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 82 transitions, 310 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:42,547 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 178 flow [2022-11-25 17:15:42,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2022-11-25 17:15:42,548 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -32 predicate places. [2022-11-25 17:15:42,548 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 178 flow [2022-11-25 17:15:42,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 157.0) internal successors, (628), 4 states have internal predecessors, (628), 0 states have call successors, (0), 0 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 17:15:42,549 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:42,549 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:15:42,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:15:42,549 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:42,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:42,550 INFO L85 PathProgramCache]: Analyzing trace with hash 50767644, now seen corresponding path program 1 times [2022-11-25 17:15:42,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:42,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345830664] [2022-11-25 17:15:42,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:42,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:42,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:42,699 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 17:15:42,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:42,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345830664] [2022-11-25 17:15:42,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345830664] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:42,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:42,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:42,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859865932] [2022-11-25 17:15:42,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:42,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:15:42,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:15:42,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:15:42,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 553 [2022-11-25 17:15:42,755 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 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 17:15:42,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:42,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 553 [2022-11-25 17:15:42,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:43,756 INFO L130 PetriNetUnfolder]: 2585/4491 cut-off events. [2022-11-25 17:15:43,756 INFO L131 PetriNetUnfolder]: For 82/82 co-relation queries the response was YES. [2022-11-25 17:15:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8712 conditions, 4491 events. 2585/4491 cut-off events. For 82/82 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 31926 event pairs, 2213 based on Foata normal form. 0/2817 useless extension candidates. Maximal degree in co-relation 8702. Up to 4119 conditions per place. [2022-11-25 17:15:43,801 INFO L137 encePairwiseOnDemand]: 548/553 looper letters, 62 selfloop transitions, 1 changer transitions 0/78 dead transitions. [2022-11-25 17:15:43,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 296 flow [2022-11-25 17:15:43,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:43,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:43,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 547 transitions. [2022-11-25 17:15:43,805 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3297166968053044 [2022-11-25 17:15:43,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 547 transitions. [2022-11-25 17:15:43,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 547 transitions. [2022-11-25 17:15:43,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:43,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 547 transitions. [2022-11-25 17:15:43,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 182.33333333333334) internal successors, (547), 3 states have internal predecessors, (547), 0 states have call successors, (0), 0 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 17:15:43,813 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:43,814 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:43,814 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 178 flow. Second operand 3 states and 547 transitions. [2022-11-25 17:15:43,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 296 flow [2022-11-25 17:15:43,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 78 transitions, 295 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:43,821 INFO L231 Difference]: Finished difference. Result has 80 places, 78 transitions, 171 flow [2022-11-25 17:15:43,822 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=171, PETRI_PLACES=80, PETRI_TRANSITIONS=78} [2022-11-25 17:15:43,824 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -35 predicate places. [2022-11-25 17:15:43,824 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 78 transitions, 171 flow [2022-11-25 17:15:43,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 161.0) internal successors, (644), 4 states have internal predecessors, (644), 0 states have call successors, (0), 0 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 17:15:43,825 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:43,825 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:43,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 17:15:43,825 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:43,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:43,826 INFO L85 PathProgramCache]: Analyzing trace with hash 591950679, now seen corresponding path program 1 times [2022-11-25 17:15:43,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:43,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027204967] [2022-11-25 17:15:43,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:43,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:43,882 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 17:15:43,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:43,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027204967] [2022-11-25 17:15:43,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027204967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:43,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:43,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:43,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892321790] [2022-11-25 17:15:43,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:43,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:15:43,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:43,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:15:43,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:15:43,900 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 553 [2022-11-25 17:15:43,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 78 transitions, 171 flow. Second operand has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 17:15:43,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:43,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 553 [2022-11-25 17:15:43,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:44,926 INFO L130 PetriNetUnfolder]: 3202/5438 cut-off events. [2022-11-25 17:15:44,927 INFO L131 PetriNetUnfolder]: For 79/79 co-relation queries the response was YES. [2022-11-25 17:15:44,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10576 conditions, 5438 events. 3202/5438 cut-off events. For 79/79 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39494 event pairs, 1329 based on Foata normal form. 56/3544 useless extension candidates. Maximal degree in co-relation 10565. Up to 4228 conditions per place. [2022-11-25 17:15:44,972 INFO L137 encePairwiseOnDemand]: 547/553 looper letters, 120 selfloop transitions, 5 changer transitions 0/139 dead transitions. [2022-11-25 17:15:44,972 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 548 flow [2022-11-25 17:15:44,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:44,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:44,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 606 transitions. [2022-11-25 17:15:44,976 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.36528028933092227 [2022-11-25 17:15:44,976 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 606 transitions. [2022-11-25 17:15:44,976 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 606 transitions. [2022-11-25 17:15:44,977 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:44,977 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 606 transitions. [2022-11-25 17:15:44,979 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 202.0) internal successors, (606), 3 states have internal predecessors, (606), 0 states have call successors, (0), 0 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 17:15:44,982 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:44,983 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:44,983 INFO L175 Difference]: Start difference. First operand has 80 places, 78 transitions, 171 flow. Second operand 3 states and 606 transitions. [2022-11-25 17:15:44,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 548 flow [2022-11-25 17:15:44,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 139 transitions, 547 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:44,989 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 208 flow [2022-11-25 17:15:44,989 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2022-11-25 17:15:44,990 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -32 predicate places. [2022-11-25 17:15:44,991 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 208 flow [2022-11-25 17:15:44,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.33333333333334) internal successors, (487), 3 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 17:15:44,991 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:44,992 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:44,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:15:44,992 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:44,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:44,993 INFO L85 PathProgramCache]: Analyzing trace with hash -744715311, now seen corresponding path program 1 times [2022-11-25 17:15:44,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:44,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453611783] [2022-11-25 17:15:44,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:45,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:45,212 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 17:15:45,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:45,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453611783] [2022-11-25 17:15:45,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453611783] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:45,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:45,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:45,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658089296] [2022-11-25 17:15:45,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:45,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:15:45,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:45,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:15:45,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:15:45,264 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 156 out of 553 [2022-11-25 17:15:45,265 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 208 flow. Second operand has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 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 17:15:45,265 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:45,266 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 156 of 553 [2022-11-25 17:15:45,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:46,028 INFO L130 PetriNetUnfolder]: 2240/3887 cut-off events. [2022-11-25 17:15:46,029 INFO L131 PetriNetUnfolder]: For 547/547 co-relation queries the response was YES. [2022-11-25 17:15:46,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7910 conditions, 3887 events. 2240/3887 cut-off events. For 547/547 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26951 event pairs, 1682 based on Foata normal form. 0/2862 useless extension candidates. Maximal degree in co-relation 7896. Up to 3512 conditions per place. [2022-11-25 17:15:46,061 INFO L137 encePairwiseOnDemand]: 542/553 looper letters, 55 selfloop transitions, 1 changer transitions 0/72 dead transitions. [2022-11-25 17:15:46,061 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 72 transitions, 300 flow [2022-11-25 17:15:46,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:46,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 531 transitions. [2022-11-25 17:15:46,065 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32007233273056057 [2022-11-25 17:15:46,065 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 531 transitions. [2022-11-25 17:15:46,065 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 531 transitions. [2022-11-25 17:15:46,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:46,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 531 transitions. [2022-11-25 17:15:46,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 177.0) internal successors, (531), 3 states have internal predecessors, (531), 0 states have call successors, (0), 0 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 17:15:46,072 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:46,074 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:46,075 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 208 flow. Second operand 3 states and 531 transitions. [2022-11-25 17:15:46,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 72 transitions, 300 flow [2022-11-25 17:15:46,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 72 transitions, 290 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:15:46,085 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 180 flow [2022-11-25 17:15:46,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2022-11-25 17:15:46,087 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -42 predicate places. [2022-11-25 17:15:46,087 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 180 flow [2022-11-25 17:15:46,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 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 17:15:46,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:46,088 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:46,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:15:46,089 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:46,089 INFO L85 PathProgramCache]: Analyzing trace with hash -744715309, now seen corresponding path program 1 times [2022-11-25 17:15:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:46,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800713625] [2022-11-25 17:15:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:46,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:15:46,325 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 17:15:46,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:15:46,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800713625] [2022-11-25 17:15:46,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800713625] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:15:46,326 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:15:46,326 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:15:46,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513806872] [2022-11-25 17:15:46,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:15:46,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:15:46,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:15:46,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:15:46,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:15:46,365 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 553 [2022-11-25 17:15:46,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 17:15:46,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:15:46,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 553 [2022-11-25 17:15:46,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:15:46,838 INFO L130 PetriNetUnfolder]: 1459/2582 cut-off events. [2022-11-25 17:15:46,838 INFO L131 PetriNetUnfolder]: For 219/219 co-relation queries the response was YES. [2022-11-25 17:15:46,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5123 conditions, 2582 events. 1459/2582 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 16751 event pairs, 1027 based on Foata normal form. 168/2184 useless extension candidates. Maximal degree in co-relation 5109. Up to 2257 conditions per place. [2022-11-25 17:15:46,859 INFO L137 encePairwiseOnDemand]: 542/553 looper letters, 45 selfloop transitions, 1 changer transitions 0/62 dead transitions. [2022-11-25 17:15:46,859 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 62 transitions, 252 flow [2022-11-25 17:15:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:15:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:15:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 539 transitions. [2022-11-25 17:15:46,862 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.32489451476793246 [2022-11-25 17:15:46,863 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 539 transitions. [2022-11-25 17:15:46,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 539 transitions. [2022-11-25 17:15:46,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:15:46,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 539 transitions. [2022-11-25 17:15:46,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 179.66666666666666) internal successors, (539), 3 states have internal predecessors, (539), 0 states have call successors, (0), 0 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 17:15:46,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:46,869 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 553.0) internal successors, (2212), 4 states have internal predecessors, (2212), 0 states have call successors, (0), 0 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 17:15:46,870 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 180 flow. Second operand 3 states and 539 transitions. [2022-11-25 17:15:46,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 62 transitions, 252 flow [2022-11-25 17:15:46,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 251 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:15:46,872 INFO L231 Difference]: Finished difference. Result has 64 places, 62 transitions, 161 flow [2022-11-25 17:15:46,873 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=553, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=161, PETRI_PLACES=64, PETRI_TRANSITIONS=62} [2022-11-25 17:15:46,873 INFO L288 CegarLoopForPetriNet]: 115 programPoint places, -51 predicate places. [2022-11-25 17:15:46,873 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 62 transitions, 161 flow [2022-11-25 17:15:46,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 164.0) internal successors, (656), 4 states have internal predecessors, (656), 0 states have call successors, (0), 0 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 17:15:46,874 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:15:46,874 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:15:46,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:15:46,875 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 94 more)] === [2022-11-25 17:15:46,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:15:46,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1268790838, now seen corresponding path program 1 times [2022-11-25 17:15:46,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:15:46,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615842076] [2022-11-25 17:15:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:15:46,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:15:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:15:46,888 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:15:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:15:46,901 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:15:46,902 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:15:46,902 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (96 of 97 remaining) [2022-11-25 17:15:46,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (95 of 97 remaining) [2022-11-25 17:15:46,902 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (94 of 97 remaining) [2022-11-25 17:15:46,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (93 of 97 remaining) [2022-11-25 17:15:46,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (92 of 97 remaining) [2022-11-25 17:15:46,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (91 of 97 remaining) [2022-11-25 17:15:46,903 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (90 of 97 remaining) [2022-11-25 17:15:46,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (89 of 97 remaining) [2022-11-25 17:15:46,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (88 of 97 remaining) [2022-11-25 17:15:46,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (87 of 97 remaining) [2022-11-25 17:15:46,904 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (86 of 97 remaining) [2022-11-25 17:15:46,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (85 of 97 remaining) [2022-11-25 17:15:46,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (84 of 97 remaining) [2022-11-25 17:15:46,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (83 of 97 remaining) [2022-11-25 17:15:46,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (82 of 97 remaining) [2022-11-25 17:15:46,905 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (81 of 97 remaining) [2022-11-25 17:15:46,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (80 of 97 remaining) [2022-11-25 17:15:46,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (79 of 97 remaining) [2022-11-25 17:15:46,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (78 of 97 remaining) [2022-11-25 17:15:46,906 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (77 of 97 remaining) [2022-11-25 17:15:46,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (76 of 97 remaining) [2022-11-25 17:15:46,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (75 of 97 remaining) [2022-11-25 17:15:46,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (74 of 97 remaining) [2022-11-25 17:15:46,907 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (73 of 97 remaining) [2022-11-25 17:15:46,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (72 of 97 remaining) [2022-11-25 17:15:46,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (71 of 97 remaining) [2022-11-25 17:15:46,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (70 of 97 remaining) [2022-11-25 17:15:46,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (69 of 97 remaining) [2022-11-25 17:15:46,908 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (68 of 97 remaining) [2022-11-25 17:15:46,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (67 of 97 remaining) [2022-11-25 17:15:46,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (66 of 97 remaining) [2022-11-25 17:15:46,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (65 of 97 remaining) [2022-11-25 17:15:46,909 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (64 of 97 remaining) [2022-11-25 17:15:46,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 97 remaining) [2022-11-25 17:15:46,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 97 remaining) [2022-11-25 17:15:46,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 97 remaining) [2022-11-25 17:15:46,910 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 97 remaining) [2022-11-25 17:15:46,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 97 remaining) [2022-11-25 17:15:46,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 97 remaining) [2022-11-25 17:15:46,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 97 remaining) [2022-11-25 17:15:46,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 97 remaining) [2022-11-25 17:15:46,911 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 97 remaining) [2022-11-25 17:15:46,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 97 remaining) [2022-11-25 17:15:46,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 97 remaining) [2022-11-25 17:15:46,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 97 remaining) [2022-11-25 17:15:46,912 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 97 remaining) [2022-11-25 17:15:46,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 97 remaining) [2022-11-25 17:15:46,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (49 of 97 remaining) [2022-11-25 17:15:46,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 97 remaining) [2022-11-25 17:15:46,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 97 remaining) [2022-11-25 17:15:46,913 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 97 remaining) [2022-11-25 17:15:46,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 97 remaining) [2022-11-25 17:15:46,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 97 remaining) [2022-11-25 17:15:46,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 97 remaining) [2022-11-25 17:15:46,914 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 97 remaining) [2022-11-25 17:15:46,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (41 of 97 remaining) [2022-11-25 17:15:46,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 97 remaining) [2022-11-25 17:15:46,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 97 remaining) [2022-11-25 17:15:46,915 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 97 remaining) [2022-11-25 17:15:46,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 97 remaining) [2022-11-25 17:15:46,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (36 of 97 remaining) [2022-11-25 17:15:46,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (35 of 97 remaining) [2022-11-25 17:15:46,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 97 remaining) [2022-11-25 17:15:46,916 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 97 remaining) [2022-11-25 17:15:46,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 97 remaining) [2022-11-25 17:15:46,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 97 remaining) [2022-11-25 17:15:46,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 97 remaining) [2022-11-25 17:15:46,917 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 97 remaining) [2022-11-25 17:15:46,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 97 remaining) [2022-11-25 17:15:46,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 97 remaining) [2022-11-25 17:15:46,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 97 remaining) [2022-11-25 17:15:46,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 97 remaining) [2022-11-25 17:15:46,918 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 97 remaining) [2022-11-25 17:15:46,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 97 remaining) [2022-11-25 17:15:46,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 97 remaining) [2022-11-25 17:15:46,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 97 remaining) [2022-11-25 17:15:46,919 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 97 remaining) [2022-11-25 17:15:46,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 97 remaining) [2022-11-25 17:15:46,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 97 remaining) [2022-11-25 17:15:46,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 97 remaining) [2022-11-25 17:15:46,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 97 remaining) [2022-11-25 17:15:46,920 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 97 remaining) [2022-11-25 17:15:46,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 97 remaining) [2022-11-25 17:15:46,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 97 remaining) [2022-11-25 17:15:46,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err18REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 97 remaining) [2022-11-25 17:15:46,921 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err19REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 97 remaining) [2022-11-25 17:15:46,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err20ASSERT_VIOLATIONARRAY_INDEX (10 of 97 remaining) [2022-11-25 17:15:46,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err21REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 97 remaining) [2022-11-25 17:15:46,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err22REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 97 remaining) [2022-11-25 17:15:46,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err23REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 97 remaining) [2022-11-25 17:15:46,922 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err24REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 97 remaining) [2022-11-25 17:15:46,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err25ASSERT_VIOLATIONARRAY_INDEX (5 of 97 remaining) [2022-11-25 17:15:46,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err30ASSERT_VIOLATIONMEMORY_LEAK (4 of 97 remaining) [2022-11-25 17:15:46,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err26REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 97 remaining) [2022-11-25 17:15:46,923 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err27REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 97 remaining) [2022-11-25 17:15:46,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err28REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 97 remaining) [2022-11-25 17:15:46,924 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err29REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 97 remaining) [2022-11-25 17:15:46,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:15:46,924 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:15:46,925 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:15:46,926 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:15:47,007 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 17:15:47,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 713 flow [2022-11-25 17:15:47,116 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-11-25 17:15:47,117 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:15:47,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 398 events. 22/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1437 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 318. Up to 8 conditions per place. [2022-11-25 17:15:47,127 INFO L82 GeneralOperation]: Start removeDead. Operand has 334 places, 346 transitions, 713 flow [2022-11-25 17:15:47,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 334 places, 346 transitions, 713 flow [2022-11-25 17:15:47,136 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:15:47,136 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 334 places, 346 transitions, 713 flow [2022-11-25 17:15:47,137 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 334 places, 346 transitions, 713 flow [2022-11-25 17:15:47,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 334 places, 346 transitions, 713 flow [2022-11-25 17:15:47,265 INFO L130 PetriNetUnfolder]: 22/398 cut-off events. [2022-11-25 17:15:47,265 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 17:15:47,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 398 events. 22/398 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1437 event pairs, 0 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 318. Up to 8 conditions per place. [2022-11-25 17:15:47,304 INFO L119 LiptonReduction]: Number of co-enabled transitions 72000 [2022-11-25 17:16:08,767 INFO L134 LiptonReduction]: Checked pairs total: 194864 [2022-11-25 17:16:08,767 INFO L136 LiptonReduction]: Total number of compositions: 427 [2022-11-25 17:16:08,769 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:16:08,772 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;@577a13e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:16:08,772 INFO L358 AbstractCegarLoop]: Starting to check reachability of 128 error locations. [2022-11-25 17:16:08,773 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:16:08,773 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:16:08,774 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:16:08,774 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:16:08,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thr1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thr1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 125 more)] === [2022-11-25 17:16:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash 80649, now seen corresponding path program 1 times [2022-11-25 17:16:08,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:08,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014179059] [2022-11-25 17:16:08,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:08,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:08,822 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 17:16:08,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:08,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014179059] [2022-11-25 17:16:08,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014179059] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:08,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:08,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:16:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506064423] [2022-11-25 17:16:08,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:16:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:16:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:16:08,849 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 220 out of 773 [2022-11-25 17:16:08,850 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 176 transitions, 373 flow. Second operand has 3 states, 3 states have (on average 220.66666666666666) internal successors, (662), 3 states have internal predecessors, (662), 0 states have call successors, (0), 0 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 17:16:08,850 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:16:08,850 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 220 of 773 [2022-11-25 17:16:08,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand