./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/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_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/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_901ec1c9-e529-420e-8996-e7f6006739b6/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 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b --- 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 17:43:06,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:43:06,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:43:06,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:43:06,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:43:06,049 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:43:06,051 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:43:06,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:43:06,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:43:06,055 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:43:06,056 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:43:06,057 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:43:06,058 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:43:06,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:43:06,067 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:43:06,069 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:43:06,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:43:06,077 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:43:06,080 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:43:06,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:43:06,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:43:06,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:43:06,096 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:43:06,097 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:43:06,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:43:06,106 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:43:06,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:43:06,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:43:06,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:43:06,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:43:06,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:43:06,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:43:06,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:43:06,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:43:06,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:43:06,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:43:06,114 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:43:06,119 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:43:06,119 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:43:06,121 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:43:06,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:43:06,123 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:43:06,166 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:43:06,166 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:43:06,167 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:43:06,167 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:43:06,168 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:43:06,168 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:43:06,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:43:06,169 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:43:06,169 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:43:06,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:43:06,171 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:43:06,171 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:43:06,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:43:06,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:43:06,172 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:43:06,172 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:43:06,172 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:43:06,172 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:43:06,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:43:06,173 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:43:06,173 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:43:06,173 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:43:06,173 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:43:06,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:43:06,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:43:06,174 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:43:06,174 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:43:06,174 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:43:06,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:43:06,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:43:06,175 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:43:06,176 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:43:06,176 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:43:06,176 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_901ec1c9-e529-420e-8996-e7f6006739b6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3de6ec2acea23c0ab47fbc2e02ad0931145060ca78b80531ef692b3505f9553b [2022-11-25 17:43:06,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:43:06,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:43:06,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:43:06,559 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:43:06,560 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:43:06,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i [2022-11-25 17:43:09,700 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:43:10,062 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:43:10,063 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i [2022-11-25 17:43:10,077 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/data/e7db9e05e/5898bcc38e6946ba9226ca4ff7b15e43/FLAG092659f56 [2022-11-25 17:43:10,094 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/data/e7db9e05e/5898bcc38e6946ba9226ca4ff7b15e43 [2022-11-25 17:43:10,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:43:10,103 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:43:10,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:43:10,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:43:10,113 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:43:10,114 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:10,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e5caba7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10, skipping insertion in model container [2022-11-25 17:43:10,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:10,124 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:43:10,206 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:43:10,697 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_901ec1c9-e529-420e-8996-e7f6006739b6/sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2022-11-25 17:43:10,736 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:43:10,750 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:43:10,788 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_901ec1c9-e529-420e-8996-e7f6006739b6/sv-benchmarks/c/goblint-regression/28-race_reach_81-list_racing.i[47038,47051] [2022-11-25 17:43:10,803 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:43:10,891 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:43:10,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10 WrapperNode [2022-11-25 17:43:10,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:43:10,894 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:43:10,894 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:43:10,894 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:43:10,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:10,932 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:10,991 INFO L138 Inliner]: procedures = 278, calls = 54, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 204 [2022-11-25 17:43:10,991 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:43:10,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:43:10,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:43:10,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:43:11,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,029 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,031 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:43:11,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:43:11,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:43:11,037 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:43:11,038 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (1/1) ... [2022-11-25 17:43:11,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:43:11,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:11,084 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:43:11,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:43:11,142 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:43:11,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:43:11,143 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-25 17:43:11,144 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-25 17:43:11,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:43:11,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:43:11,144 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-25 17:43:11,151 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-25 17:43:11,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:43:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:43:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:43:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:43:11,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:43:11,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:43:11,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:43:11,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:43:11,156 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 17:43:11,422 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:43:11,424 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:43:12,038 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:43:12,053 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:43:12,053 INFO L300 CfgBuilder]: Removed 15 assume(true) statements. [2022-11-25 17:43:12,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:43:12 BoogieIcfgContainer [2022-11-25 17:43:12,056 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:43:12,058 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:43:12,058 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:43:12,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:43:12,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:43:10" (1/3) ... [2022-11-25 17:43:12,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193bdf28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:43:12, skipping insertion in model container [2022-11-25 17:43:12,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:43:10" (2/3) ... [2022-11-25 17:43:12,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@193bdf28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:43:12, skipping insertion in model container [2022-11-25 17:43:12,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:43:12" (3/3) ... [2022-11-25 17:43:12,065 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_81-list_racing.i [2022-11-25 17:43:12,085 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:43:12,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 38 error locations. [2022-11-25 17:43:12,085 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:43:12,244 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 17:43:12,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 260 transitions, 542 flow [2022-11-25 17:43:12,539 INFO L130 PetriNetUnfolder]: 52/497 cut-off events. [2022-11-25 17:43:12,539 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 17:43:12,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 497 events. 52/497 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2302 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2022-11-25 17:43:12,550 INFO L82 GeneralOperation]: Start removeDead. Operand has 242 places, 260 transitions, 542 flow [2022-11-25 17:43:12,561 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 242 places, 260 transitions, 542 flow [2022-11-25 17:43:12,565 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:43:12,583 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 242 places, 260 transitions, 542 flow [2022-11-25 17:43:12,587 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 242 places, 260 transitions, 542 flow [2022-11-25 17:43:12,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 242 places, 260 transitions, 542 flow [2022-11-25 17:43:12,704 INFO L130 PetriNetUnfolder]: 52/497 cut-off events. [2022-11-25 17:43:12,705 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 17:43:12,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 517 conditions, 497 events. 52/497 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 2302 event pairs, 0 based on Foata normal form. 0/361 useless extension candidates. Maximal degree in co-relation 252. Up to 8 conditions per place. [2022-11-25 17:43:12,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 22256 [2022-11-25 17:43:41,795 INFO L134 LiptonReduction]: Checked pairs total: 60751 [2022-11-25 17:43:41,795 INFO L136 LiptonReduction]: Total number of compositions: 232 [2022-11-25 17:43:41,817 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:43:41,829 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;@21f3c63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:43:41,829 INFO L358 AbstractCegarLoop]: Starting to check reachability of 65 error locations. [2022-11-25 17:43:41,830 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 17:43:41,832 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:43:41,832 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:41,833 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:43:41,834 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:43:41,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:41,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1016, now seen corresponding path program 1 times [2022-11-25 17:43:41,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:41,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293536245] [2022-11-25 17:43:41,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:41,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:41,992 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 17:43:41,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:41,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293536245] [2022-11-25 17:43:41,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293536245] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:41,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:41,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:43:41,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673220987] [2022-11-25 17:43:41,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:42,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:43:42,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:42,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:43:42,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:43:42,041 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 237 out of 492 [2022-11-25 17:43:42,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 103 transitions, 228 flow. Second operand has 2 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 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 17:43:42,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:42,050 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 237 of 492 [2022-11-25 17:43:42,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:44,706 INFO L130 PetriNetUnfolder]: 11050/19656 cut-off events. [2022-11-25 17:43:44,706 INFO L131 PetriNetUnfolder]: For 124/124 co-relation queries the response was YES. [2022-11-25 17:43:44,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36722 conditions, 19656 events. 11050/19656 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 874. Compared 159284 event pairs, 10486 based on Foata normal form. 726/10309 useless extension candidates. Maximal degree in co-relation 34604. Up to 16946 conditions per place. [2022-11-25 17:43:44,842 INFO L137 encePairwiseOnDemand]: 477/492 looper letters, 66 selfloop transitions, 0 changer transitions 0/88 dead transitions. [2022-11-25 17:43:44,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 330 flow [2022-11-25 17:43:44,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:43:44,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 17:43:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 555 transitions. [2022-11-25 17:43:44,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2022-11-25 17:43:44,866 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 555 transitions. [2022-11-25 17:43:44,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 555 transitions. [2022-11-25 17:43:44,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:44,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 555 transitions. [2022-11-25 17:43:44,879 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 277.5) internal successors, (555), 2 states have internal predecessors, (555), 0 states have call successors, (0), 0 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 17:43:44,893 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 492.0) internal successors, (1476), 3 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 17:43:44,894 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 492.0) internal successors, (1476), 3 states have internal predecessors, (1476), 0 states have call successors, (0), 0 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 17:43:44,896 INFO L175 Difference]: Start difference. First operand has 91 places, 103 transitions, 228 flow. Second operand 2 states and 555 transitions. [2022-11-25 17:43:44,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 330 flow [2022-11-25 17:43:44,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 330 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:43:44,909 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 198 flow [2022-11-25 17:43:44,912 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=492, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2022-11-25 17:43:44,915 INFO L288 CegarLoopForPetriNet]: 91 programPoint places, -3 predicate places. [2022-11-25 17:43:44,916 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 198 flow [2022-11-25 17:43:44,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 237.5) internal successors, (475), 2 states have internal predecessors, (475), 0 states have call successors, (0), 0 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 17:43:44,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:44,917 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:43:44,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:43:44,917 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:43:44,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:44,920 INFO L85 PathProgramCache]: Analyzing trace with hash 32491, now seen corresponding path program 1 times [2022-11-25 17:43:44,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:44,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113385459] [2022-11-25 17:43:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:44,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:45,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:45,224 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 17:43:45,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:45,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113385459] [2022-11-25 17:43:45,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113385459] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:45,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:45,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:43:45,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664506579] [2022-11-25 17:43:45,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:45,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:45,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:45,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:45,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:45,393 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 492 [2022-11-25 17:43:45,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 198 flow. Second operand has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 17:43:45,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:45,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 492 [2022-11-25 17:43:45,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:47,702 INFO L130 PetriNetUnfolder]: 10923/19340 cut-off events. [2022-11-25 17:43:47,703 INFO L131 PetriNetUnfolder]: For 176/176 co-relation queries the response was YES. [2022-11-25 17:43:47,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36168 conditions, 19340 events. 10923/19340 cut-off events. For 176/176 co-relation queries the response was YES. Maximal size of possible extension queue 747. Compared 152840 event pairs, 9989 based on Foata normal form. 0/9702 useless extension candidates. Maximal degree in co-relation 36163. Up to 16695 conditions per place. [2022-11-25 17:43:47,820 INFO L137 encePairwiseOnDemand]: 487/492 looper letters, 67 selfloop transitions, 3 changer transitions 0/92 dead transitions. [2022-11-25 17:43:47,821 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 92 transitions, 346 flow [2022-11-25 17:43:47,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:47,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:43:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 762 transitions. [2022-11-25 17:43:47,824 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2022-11-25 17:43:47,824 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 762 transitions. [2022-11-25 17:43:47,824 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 762 transitions. [2022-11-25 17:43:47,825 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:47,825 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 762 transitions. [2022-11-25 17:43:47,828 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 254.0) internal successors, (762), 3 states have internal predecessors, (762), 0 states have call successors, (0), 0 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 17:43:47,832 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:47,833 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:47,833 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 198 flow. Second operand 3 states and 762 transitions. [2022-11-25 17:43:47,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 92 transitions, 346 flow [2022-11-25 17:43:47,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 92 transitions, 346 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:43:47,842 INFO L231 Difference]: Finished difference. Result has 91 places, 90 transitions, 219 flow [2022-11-25 17:43:47,842 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=492, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=219, PETRI_PLACES=91, PETRI_TRANSITIONS=90} [2022-11-25 17:43:47,843 INFO L288 CegarLoopForPetriNet]: 91 programPoint places, 0 predicate places. [2022-11-25 17:43:47,843 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 90 transitions, 219 flow [2022-11-25 17:43:47,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 230.66666666666666) internal successors, (692), 3 states have internal predecessors, (692), 0 states have call successors, (0), 0 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 17:43:47,844 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:47,844 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:43:47,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:43:47,845 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:43:47,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:47,848 INFO L85 PathProgramCache]: Analyzing trace with hash 32492, now seen corresponding path program 1 times [2022-11-25 17:43:47,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:47,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778273577] [2022-11-25 17:43:47,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:47,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:47,965 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 17:43:47,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:47,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778273577] [2022-11-25 17:43:47,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778273577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:47,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:47,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:43:47,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688513738] [2022-11-25 17:43:47,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:47,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:47,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:47,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:47,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:48,132 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 492 [2022-11-25 17:43:48,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 90 transitions, 219 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 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 17:43:48,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:48,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 492 [2022-11-25 17:43:48,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:50,217 INFO L130 PetriNetUnfolder]: 10165/18272 cut-off events. [2022-11-25 17:43:50,217 INFO L131 PetriNetUnfolder]: For 573/573 co-relation queries the response was YES. [2022-11-25 17:43:50,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34432 conditions, 18272 events. 10165/18272 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 768. Compared 147269 event pairs, 7688 based on Foata normal form. 0/9338 useless extension candidates. Maximal degree in co-relation 34425. Up to 12430 conditions per place. [2022-11-25 17:43:50,313 INFO L137 encePairwiseOnDemand]: 488/492 looper letters, 101 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2022-11-25 17:43:50,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 125 transitions, 497 flow [2022-11-25 17:43:50,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:50,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:43:50,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 787 transitions. [2022-11-25 17:43:50,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5331978319783198 [2022-11-25 17:43:50,316 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 787 transitions. [2022-11-25 17:43:50,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 787 transitions. [2022-11-25 17:43:50,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:50,317 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 787 transitions. [2022-11-25 17:43:50,318 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 262.3333333333333) internal successors, (787), 3 states have internal predecessors, (787), 0 states have call successors, (0), 0 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 17:43:50,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:50,322 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:50,323 INFO L175 Difference]: Start difference. First operand has 91 places, 90 transitions, 219 flow. Second operand 3 states and 787 transitions. [2022-11-25 17:43:50,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 125 transitions, 497 flow [2022-11-25 17:43:50,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 125 transitions, 494 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:43:50,326 INFO L231 Difference]: Finished difference. Result has 90 places, 88 transitions, 216 flow [2022-11-25 17:43:50,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=492, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=90, PETRI_TRANSITIONS=88} [2022-11-25 17:43:50,327 INFO L288 CegarLoopForPetriNet]: 91 programPoint places, -1 predicate places. [2022-11-25 17:43:50,328 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 88 transitions, 216 flow [2022-11-25 17:43:50,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 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 17:43:50,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:50,328 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:43:50,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:43:50,329 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:43:50,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:50,329 INFO L85 PathProgramCache]: Analyzing trace with hash 968662273, now seen corresponding path program 1 times [2022-11-25 17:43:50,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:50,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008914645] [2022-11-25 17:43:50,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:50,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:50,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:50,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:50,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:50,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008914645] [2022-11-25 17:43:50,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008914645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:43:50,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396000688] [2022-11-25 17:43:50,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:50,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:50,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:43:50,543 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:43:50,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:43:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:43:50,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:43:50,770 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 17:43:50,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 17:43:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:50,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:43:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:43:50,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396000688] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:43:50,931 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:43:50,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 17:43:50,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640450357] [2022-11-25 17:43:50,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:43:50,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:43:50,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:50,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:43:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:43:51,536 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 225 out of 492 [2022-11-25 17:43:51,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 88 transitions, 216 flow. Second operand has 8 states, 8 states have (on average 226.875) internal successors, (1815), 8 states have internal predecessors, (1815), 0 states have call successors, (0), 0 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 17:43:51,539 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:51,539 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 225 of 492 [2022-11-25 17:43:51,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:53,166 INFO L130 PetriNetUnfolder]: 9467/16761 cut-off events. [2022-11-25 17:43:53,166 INFO L131 PetriNetUnfolder]: For 499/499 co-relation queries the response was YES. [2022-11-25 17:43:53,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31762 conditions, 16761 events. 9467/16761 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 130625 event pairs, 4462 based on Foata normal form. 1/8795 useless extension candidates. Maximal degree in co-relation 31755. Up to 14423 conditions per place. [2022-11-25 17:43:53,268 INFO L137 encePairwiseOnDemand]: 487/492 looper letters, 85 selfloop transitions, 6 changer transitions 0/113 dead transitions. [2022-11-25 17:43:53,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 113 transitions, 446 flow [2022-11-25 17:43:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:43:53,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:43:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1444 transitions. [2022-11-25 17:43:53,273 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.489159891598916 [2022-11-25 17:43:53,273 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1444 transitions. [2022-11-25 17:43:53,273 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1444 transitions. [2022-11-25 17:43:53,274 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:53,274 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1444 transitions. [2022-11-25 17:43:53,278 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 240.66666666666666) internal successors, (1444), 6 states have internal predecessors, (1444), 0 states have call successors, (0), 0 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 17:43:53,284 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 0 states have call successors, (0), 0 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 17:43:53,286 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 492.0) internal successors, (3444), 7 states have internal predecessors, (3444), 0 states have call successors, (0), 0 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 17:43:53,286 INFO L175 Difference]: Start difference. First operand has 90 places, 88 transitions, 216 flow. Second operand 6 states and 1444 transitions. [2022-11-25 17:43:53,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 113 transitions, 446 flow [2022-11-25 17:43:53,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 113 transitions, 442 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:43:53,295 INFO L231 Difference]: Finished difference. Result has 92 places, 87 transitions, 220 flow [2022-11-25 17:43:53,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=492, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=220, PETRI_PLACES=92, PETRI_TRANSITIONS=87} [2022-11-25 17:43:53,296 INFO L288 CegarLoopForPetriNet]: 91 programPoint places, 1 predicate places. [2022-11-25 17:43:53,296 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 87 transitions, 220 flow [2022-11-25 17:43:53,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 226.875) internal successors, (1815), 8 states have internal predecessors, (1815), 0 states have call successors, (0), 0 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 17:43:53,297 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:53,298 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:43:53,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:43:53,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_901ec1c9-e529-420e-8996-e7f6006739b6/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:43:53,504 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:43:53,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 968662068, now seen corresponding path program 1 times [2022-11-25 17:43:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:53,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397576491] [2022-11-25 17:43:53,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:53,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:53,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:53,636 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 17:43:53,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:53,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397576491] [2022-11-25 17:43:53,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397576491] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:53,637 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:53,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:43:53,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115997059] [2022-11-25 17:43:53,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:53,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:53,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:53,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:53,777 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 492 [2022-11-25 17:43:53,778 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 87 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 17:43:53,779 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:53,779 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 492 [2022-11-25 17:43:53,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:55,368 INFO L130 PetriNetUnfolder]: 9993/18119 cut-off events. [2022-11-25 17:43:55,369 INFO L131 PetriNetUnfolder]: For 243/243 co-relation queries the response was YES. [2022-11-25 17:43:55,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33783 conditions, 18119 events. 9993/18119 cut-off events. For 243/243 co-relation queries the response was YES. Maximal size of possible extension queue 794. Compared 149431 event pairs, 7305 based on Foata normal form. 0/9590 useless extension candidates. Maximal degree in co-relation 33776. Up to 12375 conditions per place. [2022-11-25 17:43:55,474 INFO L137 encePairwiseOnDemand]: 487/492 looper letters, 98 selfloop transitions, 5 changer transitions 0/125 dead transitions. [2022-11-25 17:43:55,474 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 125 transitions, 502 flow [2022-11-25 17:43:55,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:43:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-25 17:43:55,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5453929539295393 [2022-11-25 17:43:55,478 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-25 17:43:55,478 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-25 17:43:55,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:55,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-25 17:43:55,481 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 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 17:43:55,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:55,486 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:55,486 INFO L175 Difference]: Start difference. First operand has 92 places, 87 transitions, 220 flow. Second operand 3 states and 805 transitions. [2022-11-25 17:43:55,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 125 transitions, 502 flow [2022-11-25 17:43:55,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 488 flow, removed 3 selfloop flow, removed 3 redundant places. [2022-11-25 17:43:55,491 INFO L231 Difference]: Finished difference. Result has 93 places, 89 transitions, 236 flow [2022-11-25 17:43:55,491 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=492, PETRI_DIFFERENCE_MINUEND_FLOW=206, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=93, PETRI_TRANSITIONS=89} [2022-11-25 17:43:55,492 INFO L288 CegarLoopForPetriNet]: 91 programPoint places, 2 predicate places. [2022-11-25 17:43:55,492 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 89 transitions, 236 flow [2022-11-25 17:43:55,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 17:43:55,493 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:55,493 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:43:55,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:43:55,494 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:43:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:55,494 INFO L85 PathProgramCache]: Analyzing trace with hash 968662069, now seen corresponding path program 1 times [2022-11-25 17:43:55,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:55,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014791318] [2022-11-25 17:43:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:55,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:43:55,606 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 17:43:55,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:43:55,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014791318] [2022-11-25 17:43:55,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014791318] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:43:55,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:43:55,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:43:55,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068776952] [2022-11-25 17:43:55,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:43:55,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:43:55,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:43:55,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:43:55,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:43:55,734 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 234 out of 492 [2022-11-25 17:43:55,735 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 89 transitions, 236 flow. Second operand has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 17:43:55,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:43:55,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 234 of 492 [2022-11-25 17:43:55,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:43:57,499 INFO L130 PetriNetUnfolder]: 10032/18016 cut-off events. [2022-11-25 17:43:57,499 INFO L131 PetriNetUnfolder]: For 2722/2722 co-relation queries the response was YES. [2022-11-25 17:43:57,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35671 conditions, 18016 events. 10032/18016 cut-off events. For 2722/2722 co-relation queries the response was YES. Maximal size of possible extension queue 745. Compared 145952 event pairs, 5574 based on Foata normal form. 3/10379 useless extension candidates. Maximal degree in co-relation 35664. Up to 15428 conditions per place. [2022-11-25 17:43:57,604 INFO L137 encePairwiseOnDemand]: 489/492 looper letters, 75 selfloop transitions, 3 changer transitions 0/100 dead transitions. [2022-11-25 17:43:57,604 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 416 flow [2022-11-25 17:43:57,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:43:57,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:43:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 778 transitions. [2022-11-25 17:43:57,609 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5271002710027101 [2022-11-25 17:43:57,609 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 778 transitions. [2022-11-25 17:43:57,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 778 transitions. [2022-11-25 17:43:57,610 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:43:57,610 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 778 transitions. [2022-11-25 17:43:57,613 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.3333333333333) internal successors, (778), 3 states have internal predecessors, (778), 0 states have call successors, (0), 0 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 17:43:57,616 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:57,617 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 492.0) internal successors, (1968), 4 states have internal predecessors, (1968), 0 states have call successors, (0), 0 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 17:43:57,617 INFO L175 Difference]: Start difference. First operand has 93 places, 89 transitions, 236 flow. Second operand 3 states and 778 transitions. [2022-11-25 17:43:57,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 416 flow [2022-11-25 17:43:57,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 100 transitions, 406 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:43:57,623 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 237 flow [2022-11-25 17:43:57,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=492, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=237, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2022-11-25 17:43:57,624 INFO L288 CegarLoopForPetriNet]: 91 programPoint places, 3 predicate places. [2022-11-25 17:43:57,624 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 237 flow [2022-11-25 17:43:57,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 235.66666666666666) internal successors, (707), 3 states have internal predecessors, (707), 0 states have call successors, (0), 0 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 17:43:57,625 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:43:57,625 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:43:57,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:43:57,626 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 62 more)] === [2022-11-25 17:43:57,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:43:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash -36239889, now seen corresponding path program 1 times [2022-11-25 17:43:57,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:43:57,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022785010] [2022-11-25 17:43:57,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:43:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:43:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:43:57,669 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:43:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:43:57,707 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:43:57,708 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:43:57,709 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (64 of 65 remaining) [2022-11-25 17:43:57,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (63 of 65 remaining) [2022-11-25 17:43:57,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (62 of 65 remaining) [2022-11-25 17:43:57,711 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (61 of 65 remaining) [2022-11-25 17:43:57,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (60 of 65 remaining) [2022-11-25 17:43:57,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (59 of 65 remaining) [2022-11-25 17:43:57,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (58 of 65 remaining) [2022-11-25 17:43:57,712 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (57 of 65 remaining) [2022-11-25 17:43:57,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (56 of 65 remaining) [2022-11-25 17:43:57,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (55 of 65 remaining) [2022-11-25 17:43:57,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (54 of 65 remaining) [2022-11-25 17:43:57,713 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (53 of 65 remaining) [2022-11-25 17:43:57,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (52 of 65 remaining) [2022-11-25 17:43:57,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (51 of 65 remaining) [2022-11-25 17:43:57,714 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (50 of 65 remaining) [2022-11-25 17:43:57,715 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (49 of 65 remaining) [2022-11-25 17:43:57,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 65 remaining) [2022-11-25 17:43:57,718 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 65 remaining) [2022-11-25 17:43:57,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 65 remaining) [2022-11-25 17:43:57,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 65 remaining) [2022-11-25 17:43:57,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 65 remaining) [2022-11-25 17:43:57,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 65 remaining) [2022-11-25 17:43:57,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 65 remaining) [2022-11-25 17:43:57,721 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 65 remaining) [2022-11-25 17:43:57,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 65 remaining) [2022-11-25 17:43:57,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 65 remaining) [2022-11-25 17:43:57,722 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 65 remaining) [2022-11-25 17:43:57,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 65 remaining) [2022-11-25 17:43:57,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (36 of 65 remaining) [2022-11-25 17:43:57,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (35 of 65 remaining) [2022-11-25 17:43:57,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 65 remaining) [2022-11-25 17:43:57,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 65 remaining) [2022-11-25 17:43:57,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 65 remaining) [2022-11-25 17:43:57,723 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 65 remaining) [2022-11-25 17:43:57,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 65 remaining) [2022-11-25 17:43:57,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 65 remaining) [2022-11-25 17:43:57,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 65 remaining) [2022-11-25 17:43:57,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 65 remaining) [2022-11-25 17:43:57,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 65 remaining) [2022-11-25 17:43:57,724 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 65 remaining) [2022-11-25 17:43:57,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 65 remaining) [2022-11-25 17:43:57,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 65 remaining) [2022-11-25 17:43:57,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 65 remaining) [2022-11-25 17:43:57,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 65 remaining) [2022-11-25 17:43:57,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 65 remaining) [2022-11-25 17:43:57,725 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 65 remaining) [2022-11-25 17:43:57,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 65 remaining) [2022-11-25 17:43:57,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 65 remaining) [2022-11-25 17:43:57,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 65 remaining) [2022-11-25 17:43:57,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 65 remaining) [2022-11-25 17:43:57,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 65 remaining) [2022-11-25 17:43:57,726 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 65 remaining) [2022-11-25 17:43:57,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 65 remaining) [2022-11-25 17:43:57,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 65 remaining) [2022-11-25 17:43:57,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2_funErr14ASSERT_VIOLATIONMEMORY_LEAK (10 of 65 remaining) [2022-11-25 17:43:57,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 65 remaining) [2022-11-25 17:43:57,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 65 remaining) [2022-11-25 17:43:57,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 65 remaining) [2022-11-25 17:43:57,727 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 65 remaining) [2022-11-25 17:43:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 65 remaining) [2022-11-25 17:43:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 65 remaining) [2022-11-25 17:43:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 65 remaining) [2022-11-25 17:43:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 65 remaining) [2022-11-25 17:43:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 65 remaining) [2022-11-25 17:43:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 65 remaining) [2022-11-25 17:43:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:43:57,729 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:43:57,731 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:43:57,731 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:43:57,830 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-11-25 17:43:57,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 404 transitions, 856 flow [2022-11-25 17:43:58,230 INFO L130 PetriNetUnfolder]: 191/1464 cut-off events. [2022-11-25 17:43:58,230 INFO L131 PetriNetUnfolder]: For 72/100 co-relation queries the response was YES. [2022-11-25 17:43:58,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 1464 events. 191/1464 cut-off events. For 72/100 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9977 event pairs, 2 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 912. Up to 32 conditions per place. [2022-11-25 17:43:58,249 INFO L82 GeneralOperation]: Start removeDead. Operand has 371 places, 404 transitions, 856 flow [2022-11-25 17:43:58,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 371 places, 404 transitions, 856 flow [2022-11-25 17:43:58,273 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:43:58,273 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 371 places, 404 transitions, 856 flow [2022-11-25 17:43:58,274 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 371 places, 404 transitions, 856 flow [2022-11-25 17:43:58,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 371 places, 404 transitions, 856 flow [2022-11-25 17:43:58,579 INFO L130 PetriNetUnfolder]: 191/1464 cut-off events. [2022-11-25 17:43:58,579 INFO L131 PetriNetUnfolder]: For 72/100 co-relation queries the response was YES. [2022-11-25 17:43:58,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 1464 events. 191/1464 cut-off events. For 72/100 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9977 event pairs, 2 based on Foata normal form. 0/1062 useless extension candidates. Maximal degree in co-relation 912. Up to 32 conditions per place. [2022-11-25 17:43:58,672 INFO L119 LiptonReduction]: Number of co-enabled transitions 85232 [2022-11-25 17:44:49,044 INFO L134 LiptonReduction]: Checked pairs total: 252723 [2022-11-25 17:44:49,044 INFO L136 LiptonReduction]: Total number of compositions: 331 [2022-11-25 17:44:49,046 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:44:49,046 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;@21f3c63, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:44:49,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 90 error locations. [2022-11-25 17:44:49,047 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 17:44:49,047 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:44:49,048 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:44:49,048 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 17:44:49,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 87 more)] === [2022-11-25 17:44:49,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:44:49,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1894, now seen corresponding path program 1 times [2022-11-25 17:44:49,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:44:49,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141381100] [2022-11-25 17:44:49,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:44:49,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:44:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:44:49,054 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 17:44:49,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:44:49,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141381100] [2022-11-25 17:44:49,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141381100] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:44:49,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:44:49,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 17:44:49,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412835884] [2022-11-25 17:44:49,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:44:49,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:44:49,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:44:49,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:44:49,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:44:49,058 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 362 out of 735 [2022-11-25 17:44:49,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 178 transitions, 404 flow. Second operand has 2 states, 2 states have (on average 362.5) internal successors, (725), 2 states have internal predecessors, (725), 0 states have call successors, (0), 0 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 17:44:49,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:44:49,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 362 of 735 [2022-11-25 17:44:49,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand