./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_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_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/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_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/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_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/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 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df --- 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 17:58:33,153 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:58:33,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:58:33,186 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:58:33,187 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:58:33,188 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:58:33,189 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:58:33,191 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:58:33,193 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:58:33,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:58:33,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:58:33,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:58:33,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:58:33,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:58:33,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:58:33,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:58:33,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:58:33,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:58:33,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:58:33,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:58:33,208 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:58:33,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:58:33,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:58:33,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:58:33,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:58:33,221 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:58:33,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:58:33,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:58:33,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:58:33,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:58:33,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:58:33,225 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:58:33,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:58:33,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:58:33,228 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:58:33,228 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:58:33,229 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:58:33,229 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:58:33,230 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:58:33,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:58:33,240 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:58:33,241 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:58:33,299 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:58:33,300 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:58:33,300 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:58:33,300 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:58:33,301 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:58:33,301 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:58:33,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:58:33,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:58:33,302 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:58:33,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:58:33,303 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:58:33,303 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:58:33,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:58:33,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:58:33,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:58:33,304 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:58:33,304 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:58:33,304 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:58:33,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:58:33,305 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:58:33,305 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:58:33,305 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:58:33,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:58:33,306 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:58:33,306 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:58:33,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:58:33,306 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:58:33,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:58:33,307 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:58:33,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:58:33,307 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:58:33,307 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:58:33,307 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:58:33,308 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_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 265daba2b5ad7b4578f16c23ab641f7a5441c3a3894a2482737cba7b750ee6df [2022-11-25 17:58:33,591 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:58:33,611 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:58:33,614 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:58:33,615 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:58:33,616 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:58:33,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2022-11-25 17:58:36,668 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:58:36,928 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:58:36,928 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i [2022-11-25 17:58:36,941 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/data/55a14e473/34a3d57c3b6f425397b20a3cd0d83368/FLAG90fadb3e2 [2022-11-25 17:58:36,956 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/data/55a14e473/34a3d57c3b6f425397b20a3cd0d83368 [2022-11-25 17:58:36,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:58:36,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:58:36,961 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:58:36,962 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:58:36,966 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:58:36,967 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:58:36" (1/1) ... [2022-11-25 17:58:36,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7279a696 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:36, skipping insertion in model container [2022-11-25 17:58:36,968 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:58:36" (1/1) ... [2022-11-25 17:58:36,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:58:37,009 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:58:37,414 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_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2022-11-25 17:58:37,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:58:37,461 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:58:37,493 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_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/sv-benchmarks/c/goblint-regression/28-race_reach_11-ptr_racing.i[30176,30189] [2022-11-25 17:58:37,500 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:58:37,535 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:58:37,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37 WrapperNode [2022-11-25 17:58:37,536 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:58:37,537 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:58:37,537 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:58:37,537 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:58:37,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,599 INFO L138 Inliner]: procedures = 170, calls = 43, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2022-11-25 17:58:37,599 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:58:37,600 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:58:37,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:58:37,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:58:37,609 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,610 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,629 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,629 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,635 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,639 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,641 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,659 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,661 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:58:37,662 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:58:37,662 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:58:37,663 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:58:37,663 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (1/1) ... [2022-11-25 17:58:37,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:58:37,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:37,696 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:58:37,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:58:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:58:37,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:58:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:58:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:58:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:58:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:58:37,735 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:58:37,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:58:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:58:37,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:58:37,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:58:37,738 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 17:58:37,943 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:58:37,945 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:58:38,263 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:58:38,271 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:58:38,271 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-11-25 17:58:38,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:58:38 BoogieIcfgContainer [2022-11-25 17:58:38,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:58:38,277 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:58:38,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:58:38,281 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:58:38,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:58:36" (1/3) ... [2022-11-25 17:58:38,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ee5431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:58:38, skipping insertion in model container [2022-11-25 17:58:38,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:58:37" (2/3) ... [2022-11-25 17:58:38,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55ee5431 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:58:38, skipping insertion in model container [2022-11-25 17:58:38,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:58:38" (3/3) ... [2022-11-25 17:58:38,291 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_11-ptr_racing.i [2022-11-25 17:58:38,312 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:58:38,313 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-25 17:58:38,313 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:58:38,440 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:58:38,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 139 transitions, 286 flow [2022-11-25 17:58:38,562 INFO L130 PetriNetUnfolder]: 17/186 cut-off events. [2022-11-25 17:58:38,562 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:58:38,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 17/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2022-11-25 17:58:38,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 130 places, 139 transitions, 286 flow [2022-11-25 17:58:38,576 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 130 places, 139 transitions, 286 flow [2022-11-25 17:58:38,581 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:58:38,599 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 130 places, 139 transitions, 286 flow [2022-11-25 17:58:38,602 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 130 places, 139 transitions, 286 flow [2022-11-25 17:58:38,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 130 places, 139 transitions, 286 flow [2022-11-25 17:58:38,711 INFO L130 PetriNetUnfolder]: 17/186 cut-off events. [2022-11-25 17:58:38,711 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:58:38,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192 conditions, 186 events. 17/186 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 552 event pairs, 0 based on Foata normal form. 0/142 useless extension candidates. Maximal degree in co-relation 93. Up to 4 conditions per place. [2022-11-25 17:58:38,736 INFO L119 LiptonReduction]: Number of co-enabled transitions 4346 [2022-11-25 17:58:44,058 INFO L134 LiptonReduction]: Checked pairs total: 8556 [2022-11-25 17:58:44,059 INFO L136 LiptonReduction]: Total number of compositions: 131 [2022-11-25 17:58:44,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:58:44,098 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;@5f980a13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:58:44,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2022-11-25 17:58:44,101 INFO L130 PetriNetUnfolder]: 0/2 cut-off events. [2022-11-25 17:58:44,102 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:58:44,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:44,103 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:58:44,104 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:58:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:44,110 INFO L85 PathProgramCache]: Analyzing trace with hash 17010, now seen corresponding path program 1 times [2022-11-25 17:58:44,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:44,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857922032] [2022-11-25 17:58:44,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:44,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:44,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:44,459 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 17:58:44,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:44,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857922032] [2022-11-25 17:58:44,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857922032] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:44,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:44,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:58:44,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426101273] [2022-11-25 17:58:44,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:44,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:58:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:44,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:58:44,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:58:44,588 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 270 [2022-11-25 17:58:44,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 50 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 17:58:44,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:44,592 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 270 [2022-11-25 17:58:44,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:44,784 INFO L130 PetriNetUnfolder]: 181/441 cut-off events. [2022-11-25 17:58:44,784 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:58:44,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 857 conditions, 441 events. 181/441 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2321 event pairs, 156 based on Foata normal form. 16/308 useless extension candidates. Maximal degree in co-relation 805. Up to 353 conditions per place. [2022-11-25 17:58:44,796 INFO L137 encePairwiseOnDemand]: 254/270 looper letters, 40 selfloop transitions, 3 changer transitions 0/49 dead transitions. [2022-11-25 17:58:44,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 49 transitions, 192 flow [2022-11-25 17:58:44,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:58:44,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:58:44,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2022-11-25 17:58:44,818 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5123456790123457 [2022-11-25 17:58:44,819 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2022-11-25 17:58:44,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2022-11-25 17:58:44,824 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:44,826 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2022-11-25 17:58:44,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 17:58:44,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 17:58:44,840 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 17:58:44,842 INFO L175 Difference]: Start difference. First operand has 43 places, 50 transitions, 108 flow. Second operand 3 states and 415 transitions. [2022-11-25 17:58:44,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 49 transitions, 192 flow [2022-11-25 17:58:44,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 49 transitions, 192 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:58:44,849 INFO L231 Difference]: Finished difference. Result has 41 places, 37 transitions, 88 flow [2022-11-25 17:58:44,851 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=37} [2022-11-25 17:58:44,854 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -2 predicate places. [2022-11-25 17:58:44,855 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 88 flow [2022-11-25 17:58:44,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.66666666666667) internal successors, (353), 3 states have internal predecessors, (353), 0 states have call successors, (0), 0 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 17:58:44,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:44,856 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:58:44,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:58:44,856 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:58:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash 17011, now seen corresponding path program 1 times [2022-11-25 17:58:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670815896] [2022-11-25 17:58:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:44,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:44,993 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 17:58:44,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:44,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670815896] [2022-11-25 17:58:44,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670815896] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:44,994 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:44,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:58:44,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660554073] [2022-11-25 17:58:44,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:44,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:58:44,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:44,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:58:44,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:58:45,069 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 120 out of 270 [2022-11-25 17:58:45,070 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 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 17:58:45,070 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:45,071 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 120 of 270 [2022-11-25 17:58:45,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:45,227 INFO L130 PetriNetUnfolder]: 180/414 cut-off events. [2022-11-25 17:58:45,227 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:58:45,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 859 conditions, 414 events. 180/414 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 2296 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 805. Up to 382 conditions per place. [2022-11-25 17:58:45,231 INFO L137 encePairwiseOnDemand]: 266/270 looper letters, 42 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2022-11-25 17:58:45,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 202 flow [2022-11-25 17:58:45,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:58:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:58:45,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 406 transitions. [2022-11-25 17:58:45,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5012345679012346 [2022-11-25 17:58:45,234 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 406 transitions. [2022-11-25 17:58:45,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 406 transitions. [2022-11-25 17:58:45,234 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:45,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 406 transitions. [2022-11-25 17:58:45,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 135.33333333333334) internal successors, (406), 3 states have internal predecessors, (406), 0 states have call successors, (0), 0 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 17:58:45,238 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 17:58:45,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 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 17:58:45,240 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 88 flow. Second operand 3 states and 406 transitions. [2022-11-25 17:58:45,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 202 flow [2022-11-25 17:58:45,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:58:45,243 INFO L231 Difference]: Finished difference. Result has 42 places, 37 transitions, 92 flow [2022-11-25 17:58:45,243 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=42, PETRI_TRANSITIONS=37} [2022-11-25 17:58:45,244 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -1 predicate places. [2022-11-25 17:58:45,244 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 37 transitions, 92 flow [2022-11-25 17:58:45,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 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 17:58:45,245 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:45,245 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 17:58:45,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:58:45,246 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:58:45,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash 507177538, now seen corresponding path program 1 times [2022-11-25 17:58:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:45,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959648842] [2022-11-25 17:58:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:45,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:45,431 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 17:58:45,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:45,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959648842] [2022-11-25 17:58:45,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959648842] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:45,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731519071] [2022-11-25 17:58:45,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:45,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:45,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:45,446 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:45,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:58:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:45,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:58:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:45,602 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:58:45,639 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 17:58:45,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:45,734 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 17:58:45,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731519071] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:45,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:45,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2022-11-25 17:58:45,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817449969] [2022-11-25 17:58:45,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:45,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:58:45,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:45,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:58:45,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:58:46,017 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 270 [2022-11-25 17:58:46,018 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 37 transitions, 92 flow. Second operand has 7 states, 7 states have (on average 118.71428571428571) internal successors, (831), 7 states have internal predecessors, (831), 0 states have call successors, (0), 0 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 17:58:46,018 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:46,019 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 270 [2022-11-25 17:58:46,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:46,098 INFO L130 PetriNetUnfolder]: 24/83 cut-off events. [2022-11-25 17:58:46,098 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 17:58:46,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 195 conditions, 83 events. 24/83 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 269 event pairs, 0 based on Foata normal form. 13/89 useless extension candidates. Maximal degree in co-relation 155. Up to 50 conditions per place. [2022-11-25 17:58:46,100 INFO L137 encePairwiseOnDemand]: 266/270 looper letters, 27 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2022-11-25 17:58:46,100 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 35 transitions, 139 flow [2022-11-25 17:58:46,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:58:46,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:58:46,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2022-11-25 17:58:46,102 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.462037037037037 [2022-11-25 17:58:46,102 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2022-11-25 17:58:46,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2022-11-25 17:58:46,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:46,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2022-11-25 17:58:46,105 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 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 17:58:46,107 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 17:58:46,108 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 17:58:46,108 INFO L175 Difference]: Start difference. First operand has 42 places, 37 transitions, 92 flow. Second operand 4 states and 499 transitions. [2022-11-25 17:58:46,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 35 transitions, 139 flow [2022-11-25 17:58:46,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 35 transitions, 133 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:58:46,110 INFO L231 Difference]: Finished difference. Result has 28 places, 22 transitions, 53 flow [2022-11-25 17:58:46,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=49, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=53, PETRI_PLACES=28, PETRI_TRANSITIONS=22} [2022-11-25 17:58:46,111 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -15 predicate places. [2022-11-25 17:58:46,111 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 22 transitions, 53 flow [2022-11-25 17:58:46,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 118.71428571428571) internal successors, (831), 7 states have internal predecessors, (831), 0 states have call successors, (0), 0 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 17:58:46,112 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:46,112 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:58:46,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:46,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:46,318 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:58:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:46,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1457388091, now seen corresponding path program 1 times [2022-11-25 17:58:46,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:46,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648557266] [2022-11-25 17:58:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:46,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:46,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:46,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:58:46,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:46,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648557266] [2022-11-25 17:58:46,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648557266] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:46,518 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:46,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:58:46,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094415198] [2022-11-25 17:58:46,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:46,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:58:46,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:46,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:58:46,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:58:46,676 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 270 [2022-11-25 17:58:46,677 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 28 places, 22 transitions, 53 flow. Second operand has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 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 17:58:46,678 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:46,678 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 270 [2022-11-25 17:58:46,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:46,733 INFO L130 PetriNetUnfolder]: 20/71 cut-off events. [2022-11-25 17:58:46,733 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-25 17:58:46,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145 conditions, 71 events. 20/71 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 163 event pairs, 0 based on Foata normal form. 3/71 useless extension candidates. Maximal degree in co-relation 130. Up to 50 conditions per place. [2022-11-25 17:58:46,741 INFO L137 encePairwiseOnDemand]: 266/270 looper letters, 14 selfloop transitions, 2 changer transitions 0/22 dead transitions. [2022-11-25 17:58:46,741 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 22 transitions, 87 flow [2022-11-25 17:58:46,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:58:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:58:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 482 transitions. [2022-11-25 17:58:46,743 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4462962962962963 [2022-11-25 17:58:46,743 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 482 transitions. [2022-11-25 17:58:46,744 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 482 transitions. [2022-11-25 17:58:46,744 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:46,744 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 482 transitions. [2022-11-25 17:58:46,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.5) internal successors, (482), 4 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:46,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 17:58:46,749 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 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 17:58:46,749 INFO L175 Difference]: Start difference. First operand has 28 places, 22 transitions, 53 flow. Second operand 4 states and 482 transitions. [2022-11-25 17:58:46,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 22 transitions, 87 flow [2022-11-25 17:58:46,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 22 transitions, 83 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:58:46,750 INFO L231 Difference]: Finished difference. Result has 27 places, 20 transitions, 50 flow [2022-11-25 17:58:46,751 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=50, PETRI_PLACES=27, PETRI_TRANSITIONS=20} [2022-11-25 17:58:46,753 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -16 predicate places. [2022-11-25 17:58:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 20 transitions, 50 flow [2022-11-25 17:58:46,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 117.0) internal successors, (585), 5 states have internal predecessors, (585), 0 states have call successors, (0), 0 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 17:58:46,754 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:46,754 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-11-25 17:58:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 17:58:46,754 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2022-11-25 17:58:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:46,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1457365104, now seen corresponding path program 1 times [2022-11-25 17:58:46,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557249555] [2022-11-25 17:58:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:46,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:58:46,779 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:58:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:58:46,812 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:58:46,813 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:58:46,814 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (24 of 25 remaining) [2022-11-25 17:58:46,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 25 remaining) [2022-11-25 17:58:46,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 25 remaining) [2022-11-25 17:58:46,816 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 25 remaining) [2022-11-25 17:58:46,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 25 remaining) [2022-11-25 17:58:46,817 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 25 remaining) [2022-11-25 17:58:46,820 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 25 remaining) [2022-11-25 17:58:46,821 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (17 of 25 remaining) [2022-11-25 17:58:46,823 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (16 of 25 remaining) [2022-11-25 17:58:46,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 25 remaining) [2022-11-25 17:58:46,824 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 25 remaining) [2022-11-25 17:58:46,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 25 remaining) [2022-11-25 17:58:46,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 25 remaining) [2022-11-25 17:58:46,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 25 remaining) [2022-11-25 17:58:46,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 25 remaining) [2022-11-25 17:58:46,826 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 25 remaining) [2022-11-25 17:58:46,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 25 remaining) [2022-11-25 17:58:46,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 25 remaining) [2022-11-25 17:58:46,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 25 remaining) [2022-11-25 17:58:46,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 25 remaining) [2022-11-25 17:58:46,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 25 remaining) [2022-11-25 17:58:46,827 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 25 remaining) [2022-11-25 17:58:46,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 25 remaining) [2022-11-25 17:58:46,828 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 25 remaining) [2022-11-25 17:58:46,829 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 25 remaining) [2022-11-25 17:58:46,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:58:46,829 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-11-25 17:58:46,834 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:58:46,834 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:58:46,874 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:58:46,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 182 transitions, 382 flow [2022-11-25 17:58:46,942 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2022-11-25 17:58:46,943 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:58:46,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 306 events. 31/306 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1101 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2022-11-25 17:58:46,946 INFO L82 GeneralOperation]: Start removeDead. Operand has 168 places, 182 transitions, 382 flow [2022-11-25 17:58:46,950 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 168 places, 182 transitions, 382 flow [2022-11-25 17:58:46,950 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:58:46,950 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 168 places, 182 transitions, 382 flow [2022-11-25 17:58:46,950 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 168 places, 182 transitions, 382 flow [2022-11-25 17:58:46,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 168 places, 182 transitions, 382 flow [2022-11-25 17:58:46,987 INFO L130 PetriNetUnfolder]: 31/306 cut-off events. [2022-11-25 17:58:46,988 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-25 17:58:46,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 306 events. 31/306 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1101 event pairs, 0 based on Foata normal form. 0/228 useless extension candidates. Maximal degree in co-relation 188. Up to 8 conditions per place. [2022-11-25 17:58:46,999 INFO L119 LiptonReduction]: Number of co-enabled transitions 12956 [2022-11-25 17:58:52,771 INFO L134 LiptonReduction]: Checked pairs total: 33236 [2022-11-25 17:58:52,771 INFO L136 LiptonReduction]: Total number of compositions: 172 [2022-11-25 17:58:52,774 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:58:52,777 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;@5f980a13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:58:52,777 INFO L358 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2022-11-25 17:58:52,779 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:58:52,779 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:58:52,779 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:52,780 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:58:52,780 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:58:52,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:52,780 INFO L85 PathProgramCache]: Analyzing trace with hash 29742, now seen corresponding path program 1 times [2022-11-25 17:58:52,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:52,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242518726] [2022-11-25 17:58:52,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:52,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:52,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:52,828 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 17:58:52,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:52,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242518726] [2022-11-25 17:58:52,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242518726] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:52,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:52,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:58:52,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223759714] [2022-11-25 17:58:52,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:52,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:58:52,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:58:52,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:58:52,896 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 354 [2022-11-25 17:58:52,897 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 79 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 17:58:52,897 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:52,897 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 354 [2022-11-25 17:58:52,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:54,190 INFO L130 PetriNetUnfolder]: 5944/10002 cut-off events. [2022-11-25 17:58:54,190 INFO L131 PetriNetUnfolder]: For 84/84 co-relation queries the response was YES. [2022-11-25 17:58:54,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19510 conditions, 10002 events. 5944/10002 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 72026 event pairs, 5148 based on Foata normal form. 471/6702 useless extension candidates. Maximal degree in co-relation 11685. Up to 8188 conditions per place. [2022-11-25 17:58:54,265 INFO L137 encePairwiseOnDemand]: 330/354 looper letters, 70 selfloop transitions, 3 changer transitions 0/84 dead transitions. [2022-11-25 17:58:54,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 332 flow [2022-11-25 17:58:54,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:58:54,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:58:54,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 566 transitions. [2022-11-25 17:58:54,268 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5329566854990584 [2022-11-25 17:58:54,268 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 566 transitions. [2022-11-25 17:58:54,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 566 transitions. [2022-11-25 17:58:54,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:54,270 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 566 transitions. [2022-11-25 17:58:54,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.66666666666666) internal successors, (566), 3 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:58:54,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 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 17:58:54,277 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 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 17:58:54,277 INFO L175 Difference]: Start difference. First operand has 67 places, 79 transitions, 176 flow. Second operand 3 states and 566 transitions. [2022-11-25 17:58:54,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 332 flow [2022-11-25 17:58:54,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 84 transitions, 332 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:58:54,283 INFO L231 Difference]: Finished difference. Result has 63 places, 58 transitions, 140 flow [2022-11-25 17:58:54,284 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=63, PETRI_TRANSITIONS=58} [2022-11-25 17:58:54,287 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -4 predicate places. [2022-11-25 17:58:54,288 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 58 transitions, 140 flow [2022-11-25 17:58:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 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 17:58:54,288 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:54,288 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:58:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 17:58:54,289 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:58:54,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 29743, now seen corresponding path program 1 times [2022-11-25 17:58:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827699202] [2022-11-25 17:58:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:54,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:54,369 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 17:58:54,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:54,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827699202] [2022-11-25 17:58:54,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827699202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:54,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:54,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:58:54,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115644505] [2022-11-25 17:58:54,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:54,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:58:54,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:54,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:58:54,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:58:54,454 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 354 [2022-11-25 17:58:54,455 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 58 transitions, 140 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 17:58:54,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:54,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 354 [2022-11-25 17:58:54,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:55,614 INFO L130 PetriNetUnfolder]: 5943/10031 cut-off events. [2022-11-25 17:58:55,615 INFO L131 PetriNetUnfolder]: For 186/186 co-relation queries the response was YES. [2022-11-25 17:58:55,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19998 conditions, 10031 events. 5943/10031 cut-off events. For 186/186 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 72567 event pairs, 2808 based on Foata normal form. 0/6477 useless extension candidates. Maximal degree in co-relation 17052. Up to 9394 conditions per place. [2022-11-25 17:58:55,681 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 60 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2022-11-25 17:58:55,681 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 73 transitions, 294 flow [2022-11-25 17:58:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:58:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:58:55,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-11-25 17:58:55,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4981167608286252 [2022-11-25 17:58:55,683 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-11-25 17:58:55,683 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-11-25 17:58:55,684 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:55,684 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-11-25 17:58:55,685 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 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 17:58:55,687 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 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 17:58:55,688 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 354.0) internal successors, (1416), 4 states have internal predecessors, (1416), 0 states have call successors, (0), 0 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 17:58:55,688 INFO L175 Difference]: Start difference. First operand has 63 places, 58 transitions, 140 flow. Second operand 3 states and 529 transitions. [2022-11-25 17:58:55,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 73 transitions, 294 flow [2022-11-25 17:58:55,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 73 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:58:55,714 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 148 flow [2022-11-25 17:58:55,714 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2022-11-25 17:58:55,716 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -3 predicate places. [2022-11-25 17:58:55,716 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 148 flow [2022-11-25 17:58:55,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 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 17:58:55,717 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:55,717 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:58:55,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:58:55,717 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:58:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:55,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1719109914, now seen corresponding path program 1 times [2022-11-25 17:58:55,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:55,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707602719] [2022-11-25 17:58:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:55,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:55,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:55,937 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 17:58:55,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:55,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707602719] [2022-11-25 17:58:55,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707602719] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:55,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:55,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:58:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320203043] [2022-11-25 17:58:55,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:55,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:58:55,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:55,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:58:55,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:58:56,121 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 354 [2022-11-25 17:58:56,123 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 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 17:58:56,123 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:56,123 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 354 [2022-11-25 17:58:56,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:57,232 INFO L130 PetriNetUnfolder]: 4750/8391 cut-off events. [2022-11-25 17:58:57,232 INFO L131 PetriNetUnfolder]: For 443/443 co-relation queries the response was YES. [2022-11-25 17:58:57,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16572 conditions, 8391 events. 4750/8391 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 62963 event pairs, 156 based on Foata normal form. 226/5862 useless extension candidates. Maximal degree in co-relation 16482. Up to 6141 conditions per place. [2022-11-25 17:58:57,277 INFO L137 encePairwiseOnDemand]: 347/354 looper letters, 106 selfloop transitions, 7 changer transitions 0/124 dead transitions. [2022-11-25 17:58:57,277 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 124 transitions, 521 flow [2022-11-25 17:58:57,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:58:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:58:57,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1023 transitions. [2022-11-25 17:58:57,280 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.481638418079096 [2022-11-25 17:58:57,280 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1023 transitions. [2022-11-25 17:58:57,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1023 transitions. [2022-11-25 17:58:57,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:57,281 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1023 transitions. [2022-11-25 17:58:57,284 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 170.5) internal successors, (1023), 6 states have internal predecessors, (1023), 0 states have call successors, (0), 0 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 17:58:57,287 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 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 17:58:57,288 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 354.0) internal successors, (2478), 7 states have internal predecessors, (2478), 0 states have call successors, (0), 0 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 17:58:57,288 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 148 flow. Second operand 6 states and 1023 transitions. [2022-11-25 17:58:57,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 124 transitions, 521 flow [2022-11-25 17:58:57,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 124 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:58:57,291 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 160 flow [2022-11-25 17:58:57,292 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=160, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2022-11-25 17:58:57,292 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, -2 predicate places. [2022-11-25 17:58:57,292 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 160 flow [2022-11-25 17:58:57,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 152.0) internal successors, (760), 5 states have internal predecessors, (760), 0 states have call successors, (0), 0 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 17:58:57,293 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:57,293 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 17:58:57,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:58:57,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:58:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1718848620, now seen corresponding path program 1 times [2022-11-25 17:58:57,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:57,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721789941] [2022-11-25 17:58:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:57,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:57,394 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 17:58:57,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:57,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721789941] [2022-11-25 17:58:57,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721789941] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:58:57,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462490545] [2022-11-25 17:58:57,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:57,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:57,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:58:57,397 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:58:57,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:58:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:57,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:58:57,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:58:57,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:58:57,551 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 17:58:57,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:58:57,599 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 17:58:57,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462490545] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:58:57,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:58:57,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 17:58:57,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123532316] [2022-11-25 17:58:57,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:58:57,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:58:57,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:57,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:58:57,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:58:57,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 354 [2022-11-25 17:58:57,908 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 160 flow. Second operand has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 0 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 17:58:57,908 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:57,908 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 354 [2022-11-25 17:58:57,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:58:58,767 INFO L130 PetriNetUnfolder]: 4351/7163 cut-off events. [2022-11-25 17:58:58,767 INFO L131 PetriNetUnfolder]: For 562/562 co-relation queries the response was YES. [2022-11-25 17:58:58,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15419 conditions, 7163 events. 4351/7163 cut-off events. For 562/562 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 50156 event pairs, 1 based on Foata normal form. 12/5125 useless extension candidates. Maximal degree in co-relation 11627. Up to 5463 conditions per place. [2022-11-25 17:58:58,808 INFO L137 encePairwiseOnDemand]: 348/354 looper letters, 100 selfloop transitions, 7 changer transitions 0/118 dead transitions. [2022-11-25 17:58:58,809 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 118 transitions, 494 flow [2022-11-25 17:58:58,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:58:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:58:58,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 868 transitions. [2022-11-25 17:58:58,811 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4903954802259887 [2022-11-25 17:58:58,812 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 868 transitions. [2022-11-25 17:58:58,812 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 868 transitions. [2022-11-25 17:58:58,812 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:58:58,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 868 transitions. [2022-11-25 17:58:58,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 173.6) internal successors, (868), 5 states have internal predecessors, (868), 0 states have call successors, (0), 0 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 17:58:58,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 17:58:58,889 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 17:58:58,890 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 160 flow. Second operand 5 states and 868 transitions. [2022-11-25 17:58:58,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 118 transitions, 494 flow [2022-11-25 17:58:58,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:58:58,895 INFO L231 Difference]: Finished difference. Result has 68 places, 58 transitions, 173 flow [2022-11-25 17:58:58,896 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=173, PETRI_PLACES=68, PETRI_TRANSITIONS=58} [2022-11-25 17:58:58,896 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 1 predicate places. [2022-11-25 17:58:58,896 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 58 transitions, 173 flow [2022-11-25 17:58:58,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 153.875) internal successors, (1231), 8 states have internal predecessors, (1231), 0 states have call successors, (0), 0 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 17:58:58,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:58:58,897 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:58:58,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:58:59,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:58:59,098 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:58:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:58:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1752798021, now seen corresponding path program 1 times [2022-11-25 17:58:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:58:59,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900468236] [2022-11-25 17:58:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:58:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:58:59,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:58:59,263 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 17:58:59,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:58:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900468236] [2022-11-25 17:58:59,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900468236] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:58:59,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:58:59,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:58:59,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525947133] [2022-11-25 17:58:59,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:58:59,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:58:59,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:58:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:58:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 17:58:59,450 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 354 [2022-11-25 17:58:59,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 58 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 142.2) internal successors, (711), 5 states have internal predecessors, (711), 0 states have call successors, (0), 0 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 17:58:59,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:58:59,451 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 354 [2022-11-25 17:58:59,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:59:00,571 INFO L130 PetriNetUnfolder]: 3605/6282 cut-off events. [2022-11-25 17:59:00,571 INFO L131 PetriNetUnfolder]: For 1545/1545 co-relation queries the response was YES. [2022-11-25 17:59:00,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13860 conditions, 6282 events. 3605/6282 cut-off events. For 1545/1545 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 41641 event pairs, 1267 based on Foata normal form. 0/4989 useless extension candidates. Maximal degree in co-relation 13308. Up to 4172 conditions per place. [2022-11-25 17:59:00,604 INFO L137 encePairwiseOnDemand]: 341/354 looper letters, 105 selfloop transitions, 10 changer transitions 0/124 dead transitions. [2022-11-25 17:59:00,605 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 124 transitions, 557 flow [2022-11-25 17:59:00,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:59:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:59:00,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 827 transitions. [2022-11-25 17:59:00,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4672316384180791 [2022-11-25 17:59:00,608 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 827 transitions. [2022-11-25 17:59:00,608 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 827 transitions. [2022-11-25 17:59:00,608 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:00,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 827 transitions. [2022-11-25 17:59:00,610 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 165.4) internal successors, (827), 5 states have internal predecessors, (827), 0 states have call successors, (0), 0 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 17:59:00,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 17:59:00,614 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 354.0) internal successors, (2124), 6 states have internal predecessors, (2124), 0 states have call successors, (0), 0 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 17:59:00,614 INFO L175 Difference]: Start difference. First operand has 68 places, 58 transitions, 173 flow. Second operand 5 states and 827 transitions. [2022-11-25 17:59:00,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 124 transitions, 557 flow [2022-11-25 17:59:00,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 124 transitions, 539 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:59:00,623 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 223 flow [2022-11-25 17:59:00,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2022-11-25 17:59:00,624 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 4 predicate places. [2022-11-25 17:59:00,624 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 223 flow [2022-11-25 17:59:00,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.2) internal successors, (711), 5 states have internal predecessors, (711), 0 states have call successors, (0), 0 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 17:59:00,624 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:00,625 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:00,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 17:59:00,625 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:59:00,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1325751008, now seen corresponding path program 1 times [2022-11-25 17:59:00,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:00,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697792520] [2022-11-25 17:59:00,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:00,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:00,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:59:00,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697792520] [2022-11-25 17:59:00,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697792520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:59:00,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882560489] [2022-11-25 17:59:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:00,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:59:00,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:59:00,753 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:59:00,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:59:00,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 17:59:00,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:59:00,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:59:00,861 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:59:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:59:00,938 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:59:00,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882560489] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:00,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:59:00,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2022-11-25 17:59:00,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567133091] [2022-11-25 17:59:00,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:00,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:59:00,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:00,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:59:00,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:59:01,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 354 [2022-11-25 17:59:01,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 223 flow. Second operand has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 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 17:59:01,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:59:01,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 354 [2022-11-25 17:59:01,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:59:01,653 INFO L130 PetriNetUnfolder]: 2787/5228 cut-off events. [2022-11-25 17:59:01,653 INFO L131 PetriNetUnfolder]: For 3057/3232 co-relation queries the response was YES. [2022-11-25 17:59:01,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12213 conditions, 5228 events. 2787/5228 cut-off events. For 3057/3232 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 36655 event pairs, 112 based on Foata normal form. 183/4442 useless extension candidates. Maximal degree in co-relation 10706. Up to 4320 conditions per place. [2022-11-25 17:59:01,691 INFO L137 encePairwiseOnDemand]: 350/354 looper letters, 76 selfloop transitions, 2 changer transitions 0/90 dead transitions. [2022-11-25 17:59:01,691 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 90 transitions, 505 flow [2022-11-25 17:59:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:59:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:59:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 679 transitions. [2022-11-25 17:59:01,694 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4795197740112994 [2022-11-25 17:59:01,694 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 679 transitions. [2022-11-25 17:59:01,694 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 679 transitions. [2022-11-25 17:59:01,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:01,695 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 679 transitions. [2022-11-25 17:59:01,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 169.75) internal successors, (679), 4 states have internal predecessors, (679), 0 states have call successors, (0), 0 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 17:59:01,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 17:59:01,703 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 354.0) internal successors, (1770), 5 states have internal predecessors, (1770), 0 states have call successors, (0), 0 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 17:59:01,703 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 223 flow. Second operand 4 states and 679 transitions. [2022-11-25 17:59:01,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 90 transitions, 505 flow [2022-11-25 17:59:01,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 90 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:59:01,710 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 216 flow [2022-11-25 17:59:01,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=354, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2022-11-25 17:59:01,712 INFO L288 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2022-11-25 17:59:01,712 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 216 flow [2022-11-25 17:59:01,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 154.75) internal successors, (619), 4 states have internal predecessors, (619), 0 states have call successors, (0), 0 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 17:59:01,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:01,713 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-25 17:59:01,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:59:01,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6e7f0ed0-edeb-4a55-8a88-5e3acb5b6476/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 17:59:01,918 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2022-11-25 17:59:01,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1843372303, now seen corresponding path program 1 times [2022-11-25 17:59:01,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:01,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372555963] [2022-11-25 17:59:01,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:01,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:01,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:59:01,942 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:59:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:59:01,968 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:59:01,969 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:59:01,969 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (32 of 33 remaining) [2022-11-25 17:59:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 33 remaining) [2022-11-25 17:59:01,969 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 33 remaining) [2022-11-25 17:59:01,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 33 remaining) [2022-11-25 17:59:01,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 33 remaining) [2022-11-25 17:59:01,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 33 remaining) [2022-11-25 17:59:01,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 33 remaining) [2022-11-25 17:59:01,970 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (25 of 33 remaining) [2022-11-25 17:59:01,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (24 of 33 remaining) [2022-11-25 17:59:01,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 33 remaining) [2022-11-25 17:59:01,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (22 of 33 remaining) [2022-11-25 17:59:01,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 33 remaining) [2022-11-25 17:59:01,971 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 33 remaining) [2022-11-25 17:59:01,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 33 remaining) [2022-11-25 17:59:01,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 33 remaining) [2022-11-25 17:59:01,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 33 remaining) [2022-11-25 17:59:01,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 33 remaining) [2022-11-25 17:59:01,972 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 33 remaining) [2022-11-25 17:59:01,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 33 remaining) [2022-11-25 17:59:01,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 33 remaining) [2022-11-25 17:59:01,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 33 remaining) [2022-11-25 17:59:01,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 33 remaining) [2022-11-25 17:59:01,973 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 33 remaining) [2022-11-25 17:59:01,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 33 remaining) [2022-11-25 17:59:01,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 33 remaining) [2022-11-25 17:59:01,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 33 remaining) [2022-11-25 17:59:01,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 33 remaining) [2022-11-25 17:59:01,974 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 33 remaining) [2022-11-25 17:59:01,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 33 remaining) [2022-11-25 17:59:01,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 33 remaining) [2022-11-25 17:59:01,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 33 remaining) [2022-11-25 17:59:01,975 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 33 remaining) [2022-11-25 17:59:01,976 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 33 remaining) [2022-11-25 17:59:01,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 17:59:01,976 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:59:01,978 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:59:01,978 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:59:02,017 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:59:02,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 225 transitions, 480 flow [2022-11-25 17:59:02,097 INFO L130 PetriNetUnfolder]: 50/469 cut-off events. [2022-11-25 17:59:02,098 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:59:02,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 469 events. 50/469 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1870 event pairs, 1 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 314. Up to 16 conditions per place. [2022-11-25 17:59:02,101 INFO L82 GeneralOperation]: Start removeDead. Operand has 206 places, 225 transitions, 480 flow [2022-11-25 17:59:02,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 206 places, 225 transitions, 480 flow [2022-11-25 17:59:02,107 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:59:02,107 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 206 places, 225 transitions, 480 flow [2022-11-25 17:59:02,107 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 206 places, 225 transitions, 480 flow [2022-11-25 17:59:02,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 206 places, 225 transitions, 480 flow [2022-11-25 17:59:02,163 INFO L130 PetriNetUnfolder]: 50/469 cut-off events. [2022-11-25 17:59:02,164 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-25 17:59:02,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 497 conditions, 469 events. 50/469 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1870 event pairs, 1 based on Foata normal form. 0/347 useless extension candidates. Maximal degree in co-relation 314. Up to 16 conditions per place. [2022-11-25 17:59:02,187 INFO L119 LiptonReduction]: Number of co-enabled transitions 24846 [2022-11-25 17:59:08,377 INFO L134 LiptonReduction]: Checked pairs total: 61717 [2022-11-25 17:59:08,377 INFO L136 LiptonReduction]: Total number of compositions: 203 [2022-11-25 17:59:08,379 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:59:08,379 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;@5f980a13, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:59:08,379 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2022-11-25 17:59:08,381 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 17:59:08,381 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:59:08,381 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:08,381 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:59:08,383 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-25 17:59:08,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:08,384 INFO L85 PathProgramCache]: Analyzing trace with hash 44759, now seen corresponding path program 1 times [2022-11-25 17:59:08,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:08,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428724920] [2022-11-25 17:59:08,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:08,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:08,437 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 17:59:08,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:08,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428724920] [2022-11-25 17:59:08,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428724920] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:08,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:08,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:59:08,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496737229] [2022-11-25 17:59:08,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:08,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:59:08,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:08,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:59:08,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:59:08,530 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 428 [2022-11-25 17:59:08,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 106 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 17:59:08,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:59:08,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 428 [2022-11-25 17:59:08,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:59:24,174 INFO L130 PetriNetUnfolder]: 120489/180767 cut-off events. [2022-11-25 17:59:24,174 INFO L131 PetriNetUnfolder]: For 2290/2290 co-relation queries the response was YES. [2022-11-25 17:59:24,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 349258 conditions, 180767 events. 120489/180767 cut-off events. For 2290/2290 co-relation queries the response was YES. Maximal size of possible extension queue 5789. Compared 1562401 event pairs, 78469 based on Foata normal form. 12512/126509 useless extension candidates. Maximal degree in co-relation 24466. Up to 166872 conditions per place. [2022-11-25 17:59:25,144 INFO L137 encePairwiseOnDemand]: 397/428 looper letters, 75 selfloop transitions, 2 changer transitions 0/95 dead transitions. [2022-11-25 17:59:25,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 95 transitions, 374 flow [2022-11-25 17:59:25,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:59:25,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:59:25,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2022-11-25 17:59:25,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5327102803738317 [2022-11-25 17:59:25,147 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2022-11-25 17:59:25,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2022-11-25 17:59:25,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:59:25,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2022-11-25 17:59:25,150 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 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 17:59:25,152 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 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 17:59:25,152 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 428.0) internal successors, (1712), 4 states have internal predecessors, (1712), 0 states have call successors, (0), 0 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 17:59:25,153 INFO L175 Difference]: Start difference. First operand has 89 places, 106 transitions, 242 flow. Second operand 3 states and 684 transitions. [2022-11-25 17:59:25,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 95 transitions, 374 flow [2022-11-25 17:59:25,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 95 transitions, 374 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:59:25,156 INFO L231 Difference]: Finished difference. Result has 86 places, 80 transitions, 202 flow [2022-11-25 17:59:25,157 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=428, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=86, PETRI_TRANSITIONS=80} [2022-11-25 17:59:25,157 INFO L288 CegarLoopForPetriNet]: 89 programPoint places, -3 predicate places. [2022-11-25 17:59:25,157 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 80 transitions, 202 flow [2022-11-25 17:59:25,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.66666666666666) internal successors, (572), 3 states have internal predecessors, (572), 0 states have call successors, (0), 0 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 17:59:25,158 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:59:25,158 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 17:59:25,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 17:59:25,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 38 more)] === [2022-11-25 17:59:25,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:59:25,159 INFO L85 PathProgramCache]: Analyzing trace with hash 44761, now seen corresponding path program 1 times [2022-11-25 17:59:25,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:59:25,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446378735] [2022-11-25 17:59:25,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:59:25,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:59:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:59:25,181 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 17:59:25,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:59:25,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446378735] [2022-11-25 17:59:25,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446378735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:59:25,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:59:25,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 17:59:25,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373963908] [2022-11-25 17:59:25,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:59:25,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:59:25,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:59:25,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:59:25,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:59:25,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 187 out of 428 [2022-11-25 17:59:25,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 80 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 187.66666666666666) internal successors, (563), 3 states have internal predecessors, (563), 0 states have call successors, (0), 0 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 17:59:25,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:59:25,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 187 of 428 [2022-11-25 17:59:25,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand