./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 22:06:57,894 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 22:06:57,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 22:06:57,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 22:06:57,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 22:06:57,913 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 22:06:57,915 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 22:06:57,916 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 22:06:57,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 22:06:57,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 22:06:57,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 22:06:57,920 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 22:06:57,920 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 22:06:57,921 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 22:06:57,922 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 22:06:57,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 22:06:57,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 22:06:57,925 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 22:06:57,926 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 22:06:57,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 22:06:57,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 22:06:57,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 22:06:57,931 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 22:06:57,932 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 22:06:57,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 22:06:57,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 22:06:57,936 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 22:06:57,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 22:06:57,937 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 22:06:57,938 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 22:06:57,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 22:06:57,939 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 22:06:57,939 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 22:06:57,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 22:06:57,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 22:06:57,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 22:06:57,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 22:06:57,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 22:06:57,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 22:06:57,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 22:06:57,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 22:06:57,944 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-12-13 22:06:57,957 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 22:06:57,957 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 22:06:57,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 22:06:57,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 22:06:57,962 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 22:06:57,962 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 22:06:57,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 22:06:57,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 22:06:57,963 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 22:06:57,964 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 22:06:57,964 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 22:06:57,964 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-13 22:06:57,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 22:06:57,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 22:06:57,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 22:06:57,965 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-12-13 22:06:57,965 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-12-13 22:06:57,965 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-12-13 22:06:57,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 22:06:57,966 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-12-13 22:06:57,966 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 22:06:57,966 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 22:06:57,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 22:06:57,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 22:06:57,967 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 22:06:57,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:06:57,967 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 22:06:57,967 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 22:06:57,968 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 22:06:57,968 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 22:06:57,968 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 22:06:57,968 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 22:06:57,968 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 22:06:57,968 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 22:06:57,969 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_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dce9d71ca8bbe247a74e6b2653e5cdb882c6b8b5d902edf534df70d90ee806fe [2022-12-13 22:06:58,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 22:06:58,164 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 22:06:58,166 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 22:06:58,167 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 22:06:58,167 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 22:06:58,168 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-12-13 22:07:00,693 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 22:07:00,888 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 22:07:00,889 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i [2022-12-13 22:07:00,898 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/data/eb631a8bf/f02a7b61d72147ada03d8041cccf1a68/FLAGd24046faf [2022-12-13 22:07:01,291 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/data/eb631a8bf/f02a7b61d72147ada03d8041cccf1a68 [2022-12-13 22:07:01,297 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 22:07:01,299 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 22:07:01,301 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 22:07:01,301 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 22:07:01,305 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 22:07:01,306 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,307 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25dc475f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01, skipping insertion in model container [2022-12-13 22:07:01,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,313 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 22:07:01,339 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 22:07:01,631 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_25743dcb-b2ae-4358-8a35-50bee79c2115/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-12-13 22:07:01,652 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:07:01,663 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 22:07:01,685 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_25743dcb-b2ae-4358-8a35-50bee79c2115/sv-benchmarks/c/goblint-regression/28-race_reach_77-tricky_address4_racing.i[41323,41336] [2022-12-13 22:07:01,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 22:07:01,734 INFO L208 MainTranslator]: Completed translation [2022-12-13 22:07:01,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01 WrapperNode [2022-12-13 22:07:01,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 22:07:01,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 22:07:01,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 22:07:01,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 22:07:01,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,758 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,776 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 189 [2022-12-13 22:07:01,776 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 22:07:01,777 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 22:07:01,777 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 22:07:01,777 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 22:07:01,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,787 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,793 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,797 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,798 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,799 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,801 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 22:07:01,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 22:07:01,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 22:07:01,802 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 22:07:01,803 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (1/1) ... [2022-12-13 22:07:01,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 22:07:01,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:01,825 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 22:07:01,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 22:07:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 22:07:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 22:07:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 22:07:01,852 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 22:07:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 22:07:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 22:07:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 22:07:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 22:07:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 22:07:01,853 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 22:07:01,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 22:07:01,854 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 22:07:01,960 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 22:07:01,962 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 22:07:02,228 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 22:07:02,234 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 22:07:02,234 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-12-13 22:07:02,236 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:07:02 BoogieIcfgContainer [2022-12-13 22:07:02,236 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 22:07:02,237 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 22:07:02,237 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 22:07:02,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 22:07:02,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:07:01" (1/3) ... [2022-12-13 22:07:02,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af3b7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:07:02, skipping insertion in model container [2022-12-13 22:07:02,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:07:01" (2/3) ... [2022-12-13 22:07:02,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3af3b7d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:07:02, skipping insertion in model container [2022-12-13 22:07:02,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:07:02" (3/3) ... [2022-12-13 22:07:02,242 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_77-tricky_address4_racing.i [2022-12-13 22:07:02,255 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 22:07:02,255 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-12-13 22:07:02,255 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 22:07:02,304 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 22:07:02,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 228 transitions, 464 flow [2022-12-13 22:07:02,422 INFO L130 PetriNetUnfolder]: 45/317 cut-off events. [2022-12-13 22:07:02,422 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 22:07:02,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 317 events. 45/317 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1149 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 177. Up to 8 conditions per place. [2022-12-13 22:07:02,430 INFO L82 GeneralOperation]: Start removeDead. Operand has 200 places, 228 transitions, 464 flow [2022-12-13 22:07:02,437 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 200 places, 228 transitions, 464 flow [2022-12-13 22:07:02,441 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:07:02,451 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 200 places, 228 transitions, 464 flow [2022-12-13 22:07:02,454 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 200 places, 228 transitions, 464 flow [2022-12-13 22:07:02,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 200 places, 228 transitions, 464 flow [2022-12-13 22:07:02,506 INFO L130 PetriNetUnfolder]: 45/317 cut-off events. [2022-12-13 22:07:02,506 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-12-13 22:07:02,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 323 conditions, 317 events. 45/317 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1149 event pairs, 0 based on Foata normal form. 0/226 useless extension candidates. Maximal degree in co-relation 177. Up to 8 conditions per place. [2022-12-13 22:07:02,515 INFO L119 LiptonReduction]: Number of co-enabled transitions 15770 [2022-12-13 22:07:05,742 INFO L134 LiptonReduction]: Checked pairs total: 33560 [2022-12-13 22:07:05,743 INFO L136 LiptonReduction]: Total number of compositions: 222 [2022-12-13 22:07:05,754 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:07:05,758 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;@3e8c652, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:07:05,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-12-13 22:07:05,760 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-12-13 22:07:05,760 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:07:05,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:05,761 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 22:07:05,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:07:05,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:05,764 INFO L85 PathProgramCache]: Analyzing trace with hash 907155, now seen corresponding path program 1 times [2022-12-13 22:07:05,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:05,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211129743] [2022-12-13 22:07:05,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:05,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:05,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:05,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:05,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211129743] [2022-12-13 22:07:05,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211129743] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:05,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:07:05,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:07:05,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216316104] [2022-12-13 22:07:05,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:05,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:07:05,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:05,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:07:05,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:07:06,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 193 out of 450 [2022-12-13 22:07:06,010 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 94 transitions, 196 flow. Second operand has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,010 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:06,010 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 193 of 450 [2022-12-13 22:07:06,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:06,259 INFO L130 PetriNetUnfolder]: 610/1362 cut-off events. [2022-12-13 22:07:06,259 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:07:06,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2571 conditions, 1362 events. 610/1362 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8791 event pairs, 560 based on Foata normal form. 102/953 useless extension candidates. Maximal degree in co-relation 2490. Up to 1202 conditions per place. [2022-12-13 22:07:06,269 INFO L137 encePairwiseOnDemand]: 419/450 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-12-13 22:07:06,269 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 252 flow [2022-12-13 22:07:06,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:07:06,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:07:06,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 663 transitions. [2022-12-13 22:07:06,283 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4911111111111111 [2022-12-13 22:07:06,284 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 663 transitions. [2022-12-13 22:07:06,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 663 transitions. [2022-12-13 22:07:06,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:06,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 663 transitions. [2022-12-13 22:07:06,293 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 221.0) internal successors, (663), 3 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,300 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,302 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,303 INFO L175 Difference]: Start difference. First operand has 71 places, 94 transitions, 196 flow. Second operand 3 states and 663 transitions. [2022-12-13 22:07:06,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 252 flow [2022-12-13 22:07:06,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:07:06,309 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2022-12-13 22:07:06,311 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-12-13 22:07:06,315 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-12-13 22:07:06,315 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2022-12-13 22:07:06,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 194.0) internal successors, (582), 3 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,316 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:06,316 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 22:07:06,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 22:07:06,316 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:07:06,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:06,317 INFO L85 PathProgramCache]: Analyzing trace with hash 28105377, now seen corresponding path program 1 times [2022-12-13 22:07:06,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:06,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426346612] [2022-12-13 22:07:06,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:06,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:06,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426346612] [2022-12-13 22:07:06,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426346612] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:06,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792772106] [2022-12-13 22:07:06,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:06,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:06,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:06,389 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:06,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 22:07:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:06,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:07:06,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:06,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:07:06,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:06,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792772106] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:07:06,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:07:06,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 22:07:06,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201464660] [2022-12-13 22:07:06,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:07:06,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:07:06,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:06,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:07:06,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:07:06,499 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 450 [2022-12-13 22:07:06,500 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 193.28571428571428) internal successors, (1353), 7 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:06,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 450 [2022-12-13 22:07:06,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:06,697 INFO L130 PetriNetUnfolder]: 610/1365 cut-off events. [2022-12-13 22:07:06,698 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 22:07:06,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2587 conditions, 1365 events. 610/1365 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8739 event pairs, 560 based on Foata normal form. 0/854 useless extension candidates. Maximal degree in co-relation 2575. Up to 1202 conditions per place. [2022-12-13 22:07:06,702 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-12-13 22:07:06,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 280 flow [2022-12-13 22:07:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:07:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:07:06,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1213 transitions. [2022-12-13 22:07:06,705 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44925925925925925 [2022-12-13 22:07:06,705 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1213 transitions. [2022-12-13 22:07:06,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1213 transitions. [2022-12-13 22:07:06,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:06,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1213 transitions. [2022-12-13 22:07:06,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.16666666666666) internal successors, (1213), 6 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,711 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 450.0) internal successors, (3150), 7 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,711 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1213 transitions. [2022-12-13 22:07:06,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 280 flow [2022-12-13 22:07:06,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 276 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 22:07:06,712 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2022-12-13 22:07:06,712 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2022-12-13 22:07:06,713 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-12-13 22:07:06,713 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2022-12-13 22:07:06,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 193.28571428571428) internal successors, (1353), 7 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:06,714 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:06,714 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 22:07:06,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 22:07:06,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:06,915 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:07:06,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:06,915 INFO L85 PathProgramCache]: Analyzing trace with hash -247649517, now seen corresponding path program 2 times [2022-12-13 22:07:06,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:06,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847559550] [2022-12-13 22:07:06,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:06,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:07,015 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:07,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:07,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847559550] [2022-12-13 22:07:07,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847559550] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:07,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286809272] [2022-12-13 22:07:07,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:07:07,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:07,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:07,017 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:07,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 22:07:07,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 22:07:07,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:07:07,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:07:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:07,111 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 [2022-12-13 22:07:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 22:07:07,123 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:07:07,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286809272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:07,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:07:07,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 22:07:07,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367662068] [2022-12-13 22:07:07,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:07,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:07:07,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:07,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:07:07,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:07:07,177 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 450 [2022-12-13 22:07:07,178 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,178 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:07,178 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 450 [2022-12-13 22:07:07,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:07,399 INFO L130 PetriNetUnfolder]: 583/1317 cut-off events. [2022-12-13 22:07:07,399 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-12-13 22:07:07,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2552 conditions, 1317 events. 583/1317 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 9162 event pairs, 0 based on Foata normal form. 0/835 useless extension candidates. Maximal degree in co-relation 2518. Up to 1162 conditions per place. [2022-12-13 22:07:07,406 INFO L137 encePairwiseOnDemand]: 446/450 looper letters, 78 selfloop transitions, 2 changer transitions 0/92 dead transitions. [2022-12-13 22:07:07,407 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 92 transitions, 388 flow [2022-12-13 22:07:07,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:07:07,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:07:07,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 654 transitions. [2022-12-13 22:07:07,409 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48444444444444446 [2022-12-13 22:07:07,409 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 654 transitions. [2022-12-13 22:07:07,409 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 654 transitions. [2022-12-13 22:07:07,410 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:07,410 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 654 transitions. [2022-12-13 22:07:07,411 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,415 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,415 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 654 transitions. [2022-12-13 22:07:07,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 92 transitions, 388 flow [2022-12-13 22:07:07,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 374 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 22:07:07,418 INFO L231 Difference]: Finished difference. Result has 77 places, 70 transitions, 180 flow [2022-12-13 22:07:07,418 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=180, PETRI_PLACES=77, PETRI_TRANSITIONS=70} [2022-12-13 22:07:07,419 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 6 predicate places. [2022-12-13 22:07:07,419 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 70 transitions, 180 flow [2022-12-13 22:07:07,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 193.33333333333334) internal successors, (580), 3 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:07,420 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 22:07:07,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 22:07:07,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:07,621 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:07:07,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:07,621 INFO L85 PathProgramCache]: Analyzing trace with hash -247649518, now seen corresponding path program 1 times [2022-12-13 22:07:07,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:07,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696589537] [2022-12-13 22:07:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:07,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 22:07:07,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:07,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696589537] [2022-12-13 22:07:07,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696589537] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:07,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:07:07,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:07:07,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714721135] [2022-12-13 22:07:07,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:07,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:07:07,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:07,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:07:07,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:07:07,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 450 [2022-12-13 22:07:07,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 70 transitions, 180 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,736 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:07,736 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 450 [2022-12-13 22:07:07,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:07,923 INFO L130 PetriNetUnfolder]: 565/1225 cut-off events. [2022-12-13 22:07:07,923 INFO L131 PetriNetUnfolder]: For 56/56 co-relation queries the response was YES. [2022-12-13 22:07:07,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2437 conditions, 1225 events. 565/1225 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7627 event pairs, 480 based on Foata normal form. 0/809 useless extension candidates. Maximal degree in co-relation 2408. Up to 1011 conditions per place. [2022-12-13 22:07:07,930 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 73 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2022-12-13 22:07:07,930 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 88 transitions, 368 flow [2022-12-13 22:07:07,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:07:07,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:07:07,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2022-12-13 22:07:07,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4748148148148148 [2022-12-13 22:07:07,933 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2022-12-13 22:07:07,933 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2022-12-13 22:07:07,933 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:07,933 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2022-12-13 22:07:07,935 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,937 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,938 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 450.0) internal successors, (1800), 4 states have internal predecessors, (1800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,938 INFO L175 Difference]: Start difference. First operand has 77 places, 70 transitions, 180 flow. Second operand 3 states and 641 transitions. [2022-12-13 22:07:07,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 88 transitions, 368 flow [2022-12-13 22:07:07,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 88 transitions, 364 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:07:07,940 INFO L231 Difference]: Finished difference. Result has 75 places, 68 transitions, 178 flow [2022-12-13 22:07:07,941 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=75, PETRI_TRANSITIONS=68} [2022-12-13 22:07:07,941 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-12-13 22:07:07,941 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 68 transitions, 178 flow [2022-12-13 22:07:07,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:07,941 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:07,941 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:07,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 22:07:07,942 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:07:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:07,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1027658114, now seen corresponding path program 1 times [2022-12-13 22:07:07,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:07,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227637425] [2022-12-13 22:07:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:07,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:07:08,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:08,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227637425] [2022-12-13 22:07:08,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227637425] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:08,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333710442] [2022-12-13 22:07:08,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:08,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:08,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:08,017 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:08,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 22:07:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:08,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:07:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:08,093 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:07:08,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:07:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 22:07:08,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333710442] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:07:08,134 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:07:08,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 22:07:08,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588349240] [2022-12-13 22:07:08,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:07:08,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 22:07:08,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:08,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 22:07:08,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:07:08,160 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 192 out of 450 [2022-12-13 22:07:08,165 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 68 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:08,165 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:08,165 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 192 of 450 [2022-12-13 22:07:08,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:08,383 INFO L130 PetriNetUnfolder]: 568/1241 cut-off events. [2022-12-13 22:07:08,383 INFO L131 PetriNetUnfolder]: For 104/104 co-relation queries the response was YES. [2022-12-13 22:07:08,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2493 conditions, 1241 events. 568/1241 cut-off events. For 104/104 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7723 event pairs, 520 based on Foata normal form. 6/846 useless extension candidates. Maximal degree in co-relation 2440. Up to 1098 conditions per place. [2022-12-13 22:07:08,388 INFO L137 encePairwiseOnDemand]: 447/450 looper letters, 51 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2022-12-13 22:07:08,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 74 transitions, 338 flow [2022-12-13 22:07:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 22:07:08,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 22:07:08,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2372 transitions. [2022-12-13 22:07:08,391 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43925925925925924 [2022-12-13 22:07:08,391 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2372 transitions. [2022-12-13 22:07:08,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2372 transitions. [2022-12-13 22:07:08,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:08,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2372 transitions. [2022-12-13 22:07:08,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 197.66666666666666) internal successors, (2372), 12 states have internal predecessors, (2372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:08,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:08,401 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 450.0) internal successors, (5850), 13 states have internal predecessors, (5850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:08,401 INFO L175 Difference]: Start difference. First operand has 75 places, 68 transitions, 178 flow. Second operand 12 states and 2372 transitions. [2022-12-13 22:07:08,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 74 transitions, 338 flow [2022-12-13 22:07:08,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 74 transitions, 332 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:07:08,403 INFO L231 Difference]: Finished difference. Result has 90 places, 74 transitions, 256 flow [2022-12-13 22:07:08,403 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=256, PETRI_PLACES=90, PETRI_TRANSITIONS=74} [2022-12-13 22:07:08,404 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 19 predicate places. [2022-12-13 22:07:08,404 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 74 transitions, 256 flow [2022-12-13 22:07:08,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 193.3846153846154) internal successors, (2514), 13 states have internal predecessors, (2514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:08,405 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:08,405 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:08,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 22:07:08,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:08,605 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:07:08,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:08,605 INFO L85 PathProgramCache]: Analyzing trace with hash 274306114, now seen corresponding path program 2 times [2022-12-13 22:07:08,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:08,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711216958] [2022-12-13 22:07:08,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:08,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:08,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:08,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711216958] [2022-12-13 22:07:08,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711216958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:08,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767578546] [2022-12-13 22:07:08,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:07:08,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:08,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:08,698 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:08,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 22:07:08,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 22:07:08,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:07:08,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 8 conjunts are in the unsatisfiable core [2022-12-13 22:07:08,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:08,781 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 [2022-12-13 22:07:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:08,823 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:07:08,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767578546] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:08,823 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:07:08,823 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-12-13 22:07:08,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219677354] [2022-12-13 22:07:08,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:08,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-12-13 22:07:08,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:08,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-12-13 22:07:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:07:08,908 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 191 out of 450 [2022-12-13 22:07:08,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 74 transitions, 256 flow. Second operand has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:08,910 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:08,910 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 191 of 450 [2022-12-13 22:07:08,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:09,141 INFO L130 PetriNetUnfolder]: 523/1198 cut-off events. [2022-12-13 22:07:09,141 INFO L131 PetriNetUnfolder]: For 40/40 co-relation queries the response was YES. [2022-12-13 22:07:09,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2393 conditions, 1198 events. 523/1198 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 8006 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 2316. Up to 947 conditions per place. [2022-12-13 22:07:09,145 INFO L137 encePairwiseOnDemand]: 445/450 looper letters, 98 selfloop transitions, 4 changer transitions 0/114 dead transitions. [2022-12-13 22:07:09,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 114 transitions, 538 flow [2022-12-13 22:07:09,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:07:09,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:07:09,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 857 transitions. [2022-12-13 22:07:09,147 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4761111111111111 [2022-12-13 22:07:09,147 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 857 transitions. [2022-12-13 22:07:09,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 857 transitions. [2022-12-13 22:07:09,147 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:09,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 857 transitions. [2022-12-13 22:07:09,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 214.25) internal successors, (857), 4 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:09,150 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:09,150 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 450.0) internal successors, (2250), 5 states have internal predecessors, (2250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:09,150 INFO L175 Difference]: Start difference. First operand has 90 places, 74 transitions, 256 flow. Second operand 4 states and 857 transitions. [2022-12-13 22:07:09,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 114 transitions, 538 flow [2022-12-13 22:07:09,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 114 transitions, 490 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 22:07:09,153 INFO L231 Difference]: Finished difference. Result has 87 places, 73 transitions, 212 flow [2022-12-13 22:07:09,153 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=450, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=73} [2022-12-13 22:07:09,154 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-12-13 22:07:09,154 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 73 transitions, 212 flow [2022-12-13 22:07:09,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 192.75) internal successors, (771), 4 states have internal predecessors, (771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:09,154 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:09,154 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-12-13 22:07:09,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 22:07:09,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-12-13 22:07:09,355 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-12-13 22:07:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:09,356 INFO L85 PathProgramCache]: Analyzing trace with hash -86444458, now seen corresponding path program 1 times [2022-12-13 22:07:09,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:09,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552815598] [2022-12-13 22:07:09,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:09,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:07:09,383 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:07:09,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:07:09,450 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:07:09,450 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:07:09,452 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-12-13 22:07:09,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-12-13 22:07:09,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-12-13 22:07:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-12-13 22:07:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-12-13 22:07:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-12-13 22:07:09,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-12-13 22:07:09,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-12-13 22:07:09,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-12-13 22:07:09,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (29 of 39 remaining) [2022-12-13 22:07:09,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-12-13 22:07:09,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 39 remaining) [2022-12-13 22:07:09,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-12-13 22:07:09,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-12-13 22:07:09,459 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-12-13 22:07:09,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-12-13 22:07:09,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-12-13 22:07:09,460 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-12-13 22:07:09,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-12-13 22:07:09,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-12-13 22:07:09,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-12-13 22:07:09,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-12-13 22:07:09,461 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-12-13 22:07:09,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-12-13 22:07:09,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-12-13 22:07:09,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-12-13 22:07:09,462 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-12-13 22:07:09,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-12-13 22:07:09,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-12-13 22:07:09,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-12-13 22:07:09,463 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-12-13 22:07:09,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-12-13 22:07:09,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-12-13 22:07:09,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-12-13 22:07:09,464 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-12-13 22:07:09,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-12-13 22:07:09,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-12-13 22:07:09,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-12-13 22:07:09,465 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-12-13 22:07:09,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 22:07:09,466 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-12-13 22:07:09,471 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:07:09,472 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 22:07:09,522 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 22:07:09,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 313 transitions, 644 flow [2022-12-13 22:07:09,567 INFO L130 PetriNetUnfolder]: 75/521 cut-off events. [2022-12-13 22:07:09,567 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-12-13 22:07:09,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 521 events. 75/521 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2339 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 319. Up to 12 conditions per place. [2022-12-13 22:07:09,570 INFO L82 GeneralOperation]: Start removeDead. Operand has 273 places, 313 transitions, 644 flow [2022-12-13 22:07:09,574 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 273 places, 313 transitions, 644 flow [2022-12-13 22:07:09,574 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:07:09,574 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 273 places, 313 transitions, 644 flow [2022-12-13 22:07:09,574 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 273 places, 313 transitions, 644 flow [2022-12-13 22:07:09,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 273 places, 313 transitions, 644 flow [2022-12-13 22:07:09,616 INFO L130 PetriNetUnfolder]: 75/521 cut-off events. [2022-12-13 22:07:09,616 INFO L131 PetriNetUnfolder]: For 6/9 co-relation queries the response was YES. [2022-12-13 22:07:09,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 521 events. 75/521 cut-off events. For 6/9 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2339 event pairs, 0 based on Foata normal form. 0/369 useless extension candidates. Maximal degree in co-relation 319. Up to 12 conditions per place. [2022-12-13 22:07:09,632 INFO L119 LiptonReduction]: Number of co-enabled transitions 47144 [2022-12-13 22:07:13,175 INFO L134 LiptonReduction]: Checked pairs total: 104912 [2022-12-13 22:07:13,175 INFO L136 LiptonReduction]: Total number of compositions: 297 [2022-12-13 22:07:13,177 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:07:13,178 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;@3e8c652, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:07:13,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-12-13 22:07:13,179 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-12-13 22:07:13,179 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:07:13,179 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:13,179 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 22:07:13,179 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:13,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:13,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1598566, now seen corresponding path program 1 times [2022-12-13 22:07:13,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:13,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679203495] [2022-12-13 22:07:13,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:13,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:13,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:13,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679203495] [2022-12-13 22:07:13,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679203495] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:13,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:07:13,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:07:13,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712368940] [2022-12-13 22:07:13,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:13,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:07:13,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:13,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:07:13,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:07:13,210 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 610 [2022-12-13 22:07:13,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 135 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:13,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:13,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 610 [2022-12-13 22:07:13,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:16,225 INFO L130 PetriNetUnfolder]: 27243/44246 cut-off events. [2022-12-13 22:07:16,225 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-12-13 22:07:16,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84500 conditions, 44246 events. 27243/44246 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 1882. Compared 371228 event pairs, 25858 based on Foata normal form. 3538/31479 useless extension candidates. Maximal degree in co-relation 36194. Up to 40119 conditions per place. [2022-12-13 22:07:16,429 INFO L137 encePairwiseOnDemand]: 568/610 looper letters, 76 selfloop transitions, 2 changer transitions 0/97 dead transitions. [2022-12-13 22:07:16,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 97 transitions, 368 flow [2022-12-13 22:07:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:07:16,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:07:16,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 907 transitions. [2022-12-13 22:07:16,431 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49562841530054647 [2022-12-13 22:07:16,431 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 907 transitions. [2022-12-13 22:07:16,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 907 transitions. [2022-12-13 22:07:16,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:16,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 907 transitions. [2022-12-13 22:07:16,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 302.3333333333333) internal successors, (907), 3 states have internal predecessors, (907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:16,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:16,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:16,436 INFO L175 Difference]: Start difference. First operand has 103 places, 135 transitions, 288 flow. Second operand 3 states and 907 transitions. [2022-12-13 22:07:16,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 97 transitions, 368 flow [2022-12-13 22:07:16,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 97 transitions, 368 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:07:16,438 INFO L231 Difference]: Finished difference. Result has 98 places, 97 transitions, 222 flow [2022-12-13 22:07:16,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=98, PETRI_TRANSITIONS=97} [2022-12-13 22:07:16,439 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -5 predicate places. [2022-12-13 22:07:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 97 transitions, 222 flow [2022-12-13 22:07:16,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 264.0) internal successors, (792), 3 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:16,439 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:16,439 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 22:07:16,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 22:07:16,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash 49522675, now seen corresponding path program 1 times [2022-12-13 22:07:16,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:16,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705817249] [2022-12-13 22:07:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:16,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:16,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:16,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705817249] [2022-12-13 22:07:16,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705817249] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:16,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919396724] [2022-12-13 22:07:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:16,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:16,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:16,466 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:16,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-13 22:07:16,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:07:16,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:16,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:07:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:16,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919396724] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:07:16,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:07:16,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 22:07:16,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703803982] [2022-12-13 22:07:16,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:07:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:07:16,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:07:16,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:07:16,555 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 610 [2022-12-13 22:07:16,556 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 97 transitions, 222 flow. Second operand has 7 states, 7 states have (on average 263.2857142857143) internal successors, (1843), 7 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:16,556 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:16,556 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 610 [2022-12-13 22:07:16,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:19,513 INFO L130 PetriNetUnfolder]: 27243/44249 cut-off events. [2022-12-13 22:07:19,513 INFO L131 PetriNetUnfolder]: For 152/152 co-relation queries the response was YES. [2022-12-13 22:07:19,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84516 conditions, 44249 events. 27243/44249 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 1882. Compared 371046 event pairs, 25858 based on Foata normal form. 0/27944 useless extension candidates. Maximal degree in co-relation 84503. Up to 40119 conditions per place. [2022-12-13 22:07:19,724 INFO L137 encePairwiseOnDemand]: 607/610 looper letters, 76 selfloop transitions, 5 changer transitions 0/100 dead transitions. [2022-12-13 22:07:19,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 100 transitions, 396 flow [2022-12-13 22:07:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:07:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:07:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1656 transitions. [2022-12-13 22:07:19,728 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2022-12-13 22:07:19,728 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1656 transitions. [2022-12-13 22:07:19,728 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1656 transitions. [2022-12-13 22:07:19,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:19,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1656 transitions. [2022-12-13 22:07:19,731 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 276.0) internal successors, (1656), 6 states have internal predecessors, (1656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:19,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:19,735 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:19,735 INFO L175 Difference]: Start difference. First operand has 98 places, 97 transitions, 222 flow. Second operand 6 states and 1656 transitions. [2022-12-13 22:07:19,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 100 transitions, 396 flow [2022-12-13 22:07:19,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 100 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 22:07:19,738 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 254 flow [2022-12-13 22:07:19,738 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=254, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2022-12-13 22:07:19,739 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2022-12-13 22:07:19,739 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 254 flow [2022-12-13 22:07:19,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 263.2857142857143) internal successors, (1843), 7 states have internal predecessors, (1843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:19,740 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:19,740 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 22:07:19,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-13 22:07:19,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:19,942 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:19,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:19,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2123587494, now seen corresponding path program 2 times [2022-12-13 22:07:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:19,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160889938] [2022-12-13 22:07:19,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:19,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:19,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:20,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160889938] [2022-12-13 22:07:20,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160889938] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:20,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075581810] [2022-12-13 22:07:20,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 22:07:20,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:20,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:20,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:20,031 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-13 22:07:20,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-12-13 22:07:20,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 22:07:20,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-13 22:07:20,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:20,101 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 [2022-12-13 22:07:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 22:07:20,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:07:20,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075581810] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:20,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:07:20,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-12-13 22:07:20,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475416459] [2022-12-13 22:07:20,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:20,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:07:20,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:20,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:07:20,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:07:20,168 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 610 [2022-12-13 22:07:20,169 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:20,169 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:20,169 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 610 [2022-12-13 22:07:20,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:23,083 INFO L130 PetriNetUnfolder]: 27570/44187 cut-off events. [2022-12-13 22:07:23,083 INFO L131 PetriNetUnfolder]: For 126/126 co-relation queries the response was YES. [2022-12-13 22:07:23,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84455 conditions, 44187 events. 27570/44187 cut-off events. For 126/126 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 364323 event pairs, 19467 based on Foata normal form. 0/28051 useless extension candidates. Maximal degree in co-relation 84420. Up to 40078 conditions per place. [2022-12-13 22:07:23,239 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 103 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2022-12-13 22:07:23,240 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 124 transitions, 512 flow [2022-12-13 22:07:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:07:23,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:07:23,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2022-12-13 22:07:23,242 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48579234972677593 [2022-12-13 22:07:23,242 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2022-12-13 22:07:23,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2022-12-13 22:07:23,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:23,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2022-12-13 22:07:23,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:23,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:23,246 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:23,246 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 254 flow. Second operand 3 states and 889 transitions. [2022-12-13 22:07:23,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 124 transitions, 512 flow [2022-12-13 22:07:23,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 124 transitions, 498 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 22:07:23,248 INFO L231 Difference]: Finished difference. Result has 107 places, 101 transitions, 254 flow [2022-12-13 22:07:23,249 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=107, PETRI_TRANSITIONS=101} [2022-12-13 22:07:23,249 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 4 predicate places. [2022-12-13 22:07:23,249 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 101 transitions, 254 flow [2022-12-13 22:07:23,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 263.3333333333333) internal successors, (790), 3 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:23,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:23,250 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 22:07:23,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-13 22:07:23,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:23,451 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:23,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:23,453 INFO L85 PathProgramCache]: Analyzing trace with hash 2123587495, now seen corresponding path program 1 times [2022-12-13 22:07:23,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:23,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950855441] [2022-12-13 22:07:23,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:23,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:23,513 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 22:07:23,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:23,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950855441] [2022-12-13 22:07:23,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950855441] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:23,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:07:23,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:07:23,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958766765] [2022-12-13 22:07:23,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:23,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:07:23,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:23,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:07:23,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:07:23,567 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 259 out of 610 [2022-12-13 22:07:23,568 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 101 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:23,568 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:23,568 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 259 of 610 [2022-12-13 22:07:23,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:26,861 INFO L130 PetriNetUnfolder]: 25461/40822 cut-off events. [2022-12-13 22:07:26,861 INFO L131 PetriNetUnfolder]: For 1116/1116 co-relation queries the response was YES. [2022-12-13 22:07:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79737 conditions, 40822 events. 25461/40822 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 1773. Compared 335981 event pairs, 22190 based on Foata normal form. 0/26696 useless extension candidates. Maximal degree in co-relation 79707. Up to 34425 conditions per place. [2022-12-13 22:07:27,084 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 118 selfloop transitions, 3 changer transitions 0/140 dead transitions. [2022-12-13 22:07:27,084 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 140 transitions, 574 flow [2022-12-13 22:07:27,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:07:27,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:07:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 895 transitions. [2022-12-13 22:07:27,086 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4890710382513661 [2022-12-13 22:07:27,087 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 895 transitions. [2022-12-13 22:07:27,087 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 895 transitions. [2022-12-13 22:07:27,087 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:27,087 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 895 transitions. [2022-12-13 22:07:27,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 298.3333333333333) internal successors, (895), 3 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:27,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:27,092 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 610.0) internal successors, (2440), 4 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:27,092 INFO L175 Difference]: Start difference. First operand has 107 places, 101 transitions, 254 flow. Second operand 3 states and 895 transitions. [2022-12-13 22:07:27,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 140 transitions, 574 flow [2022-12-13 22:07:27,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 140 transitions, 572 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:07:27,097 INFO L231 Difference]: Finished difference. Result has 106 places, 99 transitions, 254 flow [2022-12-13 22:07:27,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=106, PETRI_TRANSITIONS=99} [2022-12-13 22:07:27,097 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 3 predicate places. [2022-12-13 22:07:27,097 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 99 transitions, 254 flow [2022-12-13 22:07:27,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 260.3333333333333) internal successors, (781), 3 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:27,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:27,098 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:27,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 22:07:27,098 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:27,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:27,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1130977817, now seen corresponding path program 1 times [2022-12-13 22:07:27,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:27,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064300699] [2022-12-13 22:07:27,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:27,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:27,174 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:27,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:27,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064300699] [2022-12-13 22:07:27,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064300699] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:27,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820154337] [2022-12-13 22:07:27,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:27,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:27,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:27,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:27,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-13 22:07:27,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:27,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:07:27,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:27,252 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:27,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:07:27,285 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:27,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820154337] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:07:27,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:07:27,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 22:07:27,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437872712] [2022-12-13 22:07:27,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:07:27,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 22:07:27,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:27,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 22:07:27,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:07:27,314 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 262 out of 610 [2022-12-13 22:07:27,318 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 99 transitions, 254 flow. Second operand has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:27,318 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:27,318 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 262 of 610 [2022-12-13 22:07:27,318 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:30,304 INFO L130 PetriNetUnfolder]: 25539/40994 cut-off events. [2022-12-13 22:07:30,304 INFO L131 PetriNetUnfolder]: For 1432/1432 co-relation queries the response was YES. [2022-12-13 22:07:30,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80918 conditions, 40994 events. 25539/40994 cut-off events. For 1432/1432 co-relation queries the response was YES. Maximal size of possible extension queue 1773. Compared 336593 event pairs, 24034 based on Foata normal form. 6/27358 useless extension candidates. Maximal degree in co-relation 80864. Up to 37284 conditions per place. [2022-12-13 22:07:30,540 INFO L137 encePairwiseOnDemand]: 607/610 looper letters, 75 selfloop transitions, 11 changer transitions 0/105 dead transitions. [2022-12-13 22:07:30,540 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 105 transitions, 462 flow [2022-12-13 22:07:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-12-13 22:07:30,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-12-13 22:07:30,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3235 transitions. [2022-12-13 22:07:30,544 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44193989071038253 [2022-12-13 22:07:30,544 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3235 transitions. [2022-12-13 22:07:30,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3235 transitions. [2022-12-13 22:07:30,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:30,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3235 transitions. [2022-12-13 22:07:30,549 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 269.5833333333333) internal successors, (3235), 12 states have internal predecessors, (3235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:30,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 610.0) internal successors, (7930), 13 states have internal predecessors, (7930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:30,555 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 610.0) internal successors, (7930), 13 states have internal predecessors, (7930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:30,556 INFO L175 Difference]: Start difference. First operand has 106 places, 99 transitions, 254 flow. Second operand 12 states and 3235 transitions. [2022-12-13 22:07:30,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 105 transitions, 462 flow [2022-12-13 22:07:30,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 105 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-12-13 22:07:30,606 INFO L231 Difference]: Finished difference. Result has 121 places, 105 transitions, 332 flow [2022-12-13 22:07:30,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=121, PETRI_TRANSITIONS=105} [2022-12-13 22:07:30,607 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 18 predicate places. [2022-12-13 22:07:30,607 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 105 transitions, 332 flow [2022-12-13 22:07:30,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 263.46153846153845) internal successors, (3425), 13 states have internal predecessors, (3425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:30,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:30,608 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:30,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-12-13 22:07:30,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-13 22:07:30,809 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:30,811 INFO L85 PathProgramCache]: Analyzing trace with hash 956307193, now seen corresponding path program 2 times [2022-12-13 22:07:30,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:30,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285400516] [2022-12-13 22:07:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:30,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:31,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:31,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285400516] [2022-12-13 22:07:31,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285400516] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:31,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:07:31,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:07:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700611832] [2022-12-13 22:07:31,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:31,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:07:31,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:31,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:07:31,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:07:31,376 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 610 [2022-12-13 22:07:31,377 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 105 transitions, 332 flow. Second operand has 6 states, 6 states have (on average 239.33333333333334) internal successors, (1436), 6 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:31,377 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:31,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 610 [2022-12-13 22:07:31,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:33,195 INFO L130 PetriNetUnfolder]: 13037/21144 cut-off events. [2022-12-13 22:07:33,195 INFO L131 PetriNetUnfolder]: For 638/638 co-relation queries the response was YES. [2022-12-13 22:07:33,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41498 conditions, 21144 events. 13037/21144 cut-off events. For 638/638 co-relation queries the response was YES. Maximal size of possible extension queue 807. Compared 161265 event pairs, 3179 based on Foata normal form. 1280/17905 useless extension candidates. Maximal degree in co-relation 41420. Up to 16875 conditions per place. [2022-12-13 22:07:33,308 INFO L137 encePairwiseOnDemand]: 589/610 looper letters, 157 selfloop transitions, 8 changer transitions 0/181 dead transitions. [2022-12-13 22:07:33,308 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 181 transitions, 830 flow [2022-12-13 22:07:33,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:07:33,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:07:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1623 transitions. [2022-12-13 22:07:33,310 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44344262295081965 [2022-12-13 22:07:33,310 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1623 transitions. [2022-12-13 22:07:33,311 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1623 transitions. [2022-12-13 22:07:33,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:33,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1623 transitions. [2022-12-13 22:07:33,313 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 270.5) internal successors, (1623), 6 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:33,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:33,315 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:33,315 INFO L175 Difference]: Start difference. First operand has 121 places, 105 transitions, 332 flow. Second operand 6 states and 1623 transitions. [2022-12-13 22:07:33,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 181 transitions, 830 flow [2022-12-13 22:07:33,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 181 transitions, 782 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-12-13 22:07:33,318 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 274 flow [2022-12-13 22:07:33,318 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2022-12-13 22:07:33,319 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, 2 predicate places. [2022-12-13 22:07:33,319 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 274 flow [2022-12-13 22:07:33,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 239.33333333333334) internal successors, (1436), 6 states have internal predecessors, (1436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:33,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:33,319 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:33,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 22:07:33,319 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:33,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:33,320 INFO L85 PathProgramCache]: Analyzing trace with hash 955727998, now seen corresponding path program 1 times [2022-12-13 22:07:33,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:33,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39207043] [2022-12-13 22:07:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:33,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:33,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39207043] [2022-12-13 22:07:33,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39207043] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:33,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570975891] [2022-12-13 22:07:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:33,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:33,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:33,392 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:33,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-13 22:07:33,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:33,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 22:07:33,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:33,478 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 [2022-12-13 22:07:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:33,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:07:33,541 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:33,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570975891] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:07:33,541 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:07:33,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-12-13 22:07:33,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390980790] [2022-12-13 22:07:33,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:07:33,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 22:07:33,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:33,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 22:07:33,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-12-13 22:07:33,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 610 [2022-12-13 22:07:33,932 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 260.125) internal successors, (2081), 8 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:33,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:33,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 610 [2022-12-13 22:07:33,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:34,288 INFO L130 PetriNetUnfolder]: 1311/2513 cut-off events. [2022-12-13 22:07:34,289 INFO L131 PetriNetUnfolder]: For 693/693 co-relation queries the response was YES. [2022-12-13 22:07:34,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5648 conditions, 2513 events. 1311/2513 cut-off events. For 693/693 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16030 event pairs, 0 based on Foata normal form. 285/2503 useless extension candidates. Maximal degree in co-relation 5593. Up to 1554 conditions per place. [2022-12-13 22:07:34,297 INFO L137 encePairwiseOnDemand]: 606/610 looper letters, 93 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2022-12-13 22:07:34,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 106 transitions, 478 flow [2022-12-13 22:07:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 22:07:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 22:07:34,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1380 transitions. [2022-12-13 22:07:34,299 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4524590163934426 [2022-12-13 22:07:34,299 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1380 transitions. [2022-12-13 22:07:34,299 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1380 transitions. [2022-12-13 22:07:34,299 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:34,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1380 transitions. [2022-12-13 22:07:34,301 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 276.0) internal successors, (1380), 5 states have internal predecessors, (1380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:34,302 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:34,303 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 610.0) internal successors, (3660), 6 states have internal predecessors, (3660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:34,303 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 274 flow. Second operand 5 states and 1380 transitions. [2022-12-13 22:07:34,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 106 transitions, 478 flow [2022-12-13 22:07:34,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 106 transitions, 469 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 22:07:34,305 INFO L231 Difference]: Finished difference. Result has 78 places, 59 transitions, 187 flow [2022-12-13 22:07:34,305 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=187, PETRI_PLACES=78, PETRI_TRANSITIONS=59} [2022-12-13 22:07:34,306 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -25 predicate places. [2022-12-13 22:07:34,306 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 59 transitions, 187 flow [2022-12-13 22:07:34,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 260.125) internal successors, (2081), 8 states have internal predecessors, (2081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:34,306 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:34,306 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:34,310 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-13 22:07:34,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-12-13 22:07:34,508 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:34,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:34,509 INFO L85 PathProgramCache]: Analyzing trace with hash -419249859, now seen corresponding path program 1 times [2022-12-13 22:07:34,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:34,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100877967] [2022-12-13 22:07:34,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:34,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:34,836 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:34,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:34,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100877967] [2022-12-13 22:07:34,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100877967] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:34,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:07:34,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-13 22:07:34,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977723543] [2022-12-13 22:07:34,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:34,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-12-13 22:07:34,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:34,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-12-13 22:07:34,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-12-13 22:07:35,254 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 252 out of 610 [2022-12-13 22:07:35,256 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 59 transitions, 187 flow. Second operand has 6 states, 6 states have (on average 253.5) internal successors, (1521), 6 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:35,256 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:35,256 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 252 of 610 [2022-12-13 22:07:35,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:35,552 INFO L130 PetriNetUnfolder]: 1380/2436 cut-off events. [2022-12-13 22:07:35,552 INFO L131 PetriNetUnfolder]: For 949/949 co-relation queries the response was YES. [2022-12-13 22:07:35,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5375 conditions, 2436 events. 1380/2436 cut-off events. For 949/949 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14246 event pairs, 841 based on Foata normal form. 0/2115 useless extension candidates. Maximal degree in co-relation 5321. Up to 2124 conditions per place. [2022-12-13 22:07:35,560 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 56 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2022-12-13 22:07:35,560 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 73 transitions, 350 flow [2022-12-13 22:07:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:07:35,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:07:35,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1565 transitions. [2022-12-13 22:07:35,563 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4275956284153005 [2022-12-13 22:07:35,563 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1565 transitions. [2022-12-13 22:07:35,563 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1565 transitions. [2022-12-13 22:07:35,564 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:35,564 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1565 transitions. [2022-12-13 22:07:35,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 260.8333333333333) internal successors, (1565), 6 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:35,567 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:35,567 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 610.0) internal successors, (4270), 7 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:35,568 INFO L175 Difference]: Start difference. First operand has 78 places, 59 transitions, 187 flow. Second operand 6 states and 1565 transitions. [2022-12-13 22:07:35,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 73 transitions, 350 flow [2022-12-13 22:07:35,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 73 transitions, 339 flow, removed 1 selfloop flow, removed 3 redundant places. [2022-12-13 22:07:35,569 INFO L231 Difference]: Finished difference. Result has 82 places, 64 transitions, 219 flow [2022-12-13 22:07:35,569 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=219, PETRI_PLACES=82, PETRI_TRANSITIONS=64} [2022-12-13 22:07:35,570 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -21 predicate places. [2022-12-13 22:07:35,570 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 64 transitions, 219 flow [2022-12-13 22:07:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 253.5) internal successors, (1521), 6 states have internal predecessors, (1521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:35,570 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:35,570 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:35,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 22:07:35,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash -121903528, now seen corresponding path program 1 times [2022-12-13 22:07:35,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:35,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272898991] [2022-12-13 22:07:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:35,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:35,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-12-13 22:07:35,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:35,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272898991] [2022-12-13 22:07:35,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272898991] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:35,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141853299] [2022-12-13 22:07:35,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:35,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:35,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:35,801 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:35,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-13 22:07:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2022-12-13 22:07:35,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:35,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 6 [2022-12-13 22:07:35,934 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-12-13 22:07:35,934 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-12-13 22:07:35,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2022-12-13 22:07:35,988 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 15 [2022-12-13 22:07:35,998 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 22:07:35,999 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:07:35,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141853299] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:35,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:07:35,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-12-13 22:07:35,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696096533] [2022-12-13 22:07:35,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:35,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:07:36,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:36,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:07:36,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:07:36,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 229 out of 610 [2022-12-13 22:07:36,203 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 64 transitions, 219 flow. Second operand has 5 states, 5 states have (on average 231.2) internal successors, (1156), 5 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:36,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:36,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 229 of 610 [2022-12-13 22:07:36,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:36,450 INFO L130 PetriNetUnfolder]: 1407/2515 cut-off events. [2022-12-13 22:07:36,450 INFO L131 PetriNetUnfolder]: For 852/852 co-relation queries the response was YES. [2022-12-13 22:07:36,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5772 conditions, 2515 events. 1407/2515 cut-off events. For 852/852 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 14997 event pairs, 546 based on Foata normal form. 34/2313 useless extension candidates. Maximal degree in co-relation 5716. Up to 1499 conditions per place. [2022-12-13 22:07:36,459 INFO L137 encePairwiseOnDemand]: 604/610 looper letters, 74 selfloop transitions, 5 changer transitions 0/88 dead transitions. [2022-12-13 22:07:36,459 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 88 transitions, 441 flow [2022-12-13 22:07:36,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:07:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:07:36,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 980 transitions. [2022-12-13 22:07:36,461 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4016393442622951 [2022-12-13 22:07:36,461 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 980 transitions. [2022-12-13 22:07:36,461 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 980 transitions. [2022-12-13 22:07:36,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:36,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 980 transitions. [2022-12-13 22:07:36,462 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:36,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:36,464 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:36,464 INFO L175 Difference]: Start difference. First operand has 82 places, 64 transitions, 219 flow. Second operand 4 states and 980 transitions. [2022-12-13 22:07:36,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 88 transitions, 441 flow [2022-12-13 22:07:36,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 439 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-12-13 22:07:36,466 INFO L231 Difference]: Finished difference. Result has 85 places, 66 transitions, 245 flow [2022-12-13 22:07:36,466 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=245, PETRI_PLACES=85, PETRI_TRANSITIONS=66} [2022-12-13 22:07:36,466 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -18 predicate places. [2022-12-13 22:07:36,466 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 66 transitions, 245 flow [2022-12-13 22:07:36,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 231.2) internal successors, (1156), 5 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:36,467 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:36,467 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:36,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-13 22:07:36,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-13 22:07:36,667 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:36,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:36,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1958846934, now seen corresponding path program 1 times [2022-12-13 22:07:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:36,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787389989] [2022-12-13 22:07:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:36,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-12-13 22:07:36,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787389989] [2022-12-13 22:07:36,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787389989] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:07:36,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876178654] [2022-12-13 22:07:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:36,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:07:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:07:36,815 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:07:36,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-13 22:07:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:36,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-13 22:07:36,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:07:36,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-12-13 22:07:36,975 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 [2022-12-13 22:07:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-12-13 22:07:37,030 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-12-13 22:07:37,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876178654] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:37,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-12-13 22:07:37,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-12-13 22:07:37,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234590533] [2022-12-13 22:07:37,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:37,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-13 22:07:37,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:37,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-13 22:07:37,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-12-13 22:07:37,226 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 610 [2022-12-13 22:07:37,227 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 66 transitions, 245 flow. Second operand has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:37,227 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:37,227 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 610 [2022-12-13 22:07:37,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:07:37,494 INFO L130 PetriNetUnfolder]: 1188/2116 cut-off events. [2022-12-13 22:07:37,494 INFO L131 PetriNetUnfolder]: For 848/848 co-relation queries the response was YES. [2022-12-13 22:07:37,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5055 conditions, 2116 events. 1188/2116 cut-off events. For 848/848 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 12080 event pairs, 78 based on Foata normal form. 45/2063 useless extension candidates. Maximal degree in co-relation 4997. Up to 1774 conditions per place. [2022-12-13 22:07:37,500 INFO L137 encePairwiseOnDemand]: 605/610 looper letters, 67 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2022-12-13 22:07:37,501 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 78 transitions, 419 flow [2022-12-13 22:07:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-12-13 22:07:37,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-12-13 22:07:37,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 966 transitions. [2022-12-13 22:07:37,503 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3959016393442623 [2022-12-13 22:07:37,503 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 966 transitions. [2022-12-13 22:07:37,503 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 966 transitions. [2022-12-13 22:07:37,503 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:07:37,503 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 966 transitions. [2022-12-13 22:07:37,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 241.5) internal successors, (966), 4 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:37,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:37,506 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 610.0) internal successors, (3050), 5 states have internal predecessors, (3050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:37,506 INFO L175 Difference]: Start difference. First operand has 85 places, 66 transitions, 245 flow. Second operand 4 states and 966 transitions. [2022-12-13 22:07:37,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 78 transitions, 419 flow [2022-12-13 22:07:37,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 408 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-12-13 22:07:37,508 INFO L231 Difference]: Finished difference. Result has 83 places, 63 transitions, 233 flow [2022-12-13 22:07:37,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=610, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=233, PETRI_PLACES=83, PETRI_TRANSITIONS=63} [2022-12-13 22:07:37,508 INFO L288 CegarLoopForPetriNet]: 103 programPoint places, -20 predicate places. [2022-12-13 22:07:37,508 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 63 transitions, 233 flow [2022-12-13 22:07:37,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 230.0) internal successors, (1150), 5 states have internal predecessors, (1150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:37,509 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:37,509 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-12-13 22:07:37,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-12-13 22:07:37,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-13 22:07:37,710 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-12-13 22:07:37,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 576516873, now seen corresponding path program 1 times [2022-12-13 22:07:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:37,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357808738] [2022-12-13 22:07:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:37,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:07:37,752 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 22:07:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 22:07:37,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 22:07:37,766 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-12-13 22:07:37,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (40 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (38 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-12-13 22:07:37,767 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-12-13 22:07:37,768 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-12-13 22:07:37,769 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-12-13 22:07:37,770 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-12-13 22:07:37,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-12-13 22:07:37,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-12-13 22:07:37,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-12-13 22:07:37,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-12-13 22:07:37,771 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-12-13 22:07:37,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-12-13 22:07:37,771 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 22:07:37,772 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 22:07:37,772 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 22:07:37,808 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 22:07:37,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 398 transitions, 826 flow [2022-12-13 22:07:37,895 INFO L130 PetriNetUnfolder]: 110/768 cut-off events. [2022-12-13 22:07:37,895 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-12-13 22:07:37,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 768 events. 110/768 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3789 event pairs, 1 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 529. Up to 16 conditions per place. [2022-12-13 22:07:37,900 INFO L82 GeneralOperation]: Start removeDead. Operand has 346 places, 398 transitions, 826 flow [2022-12-13 22:07:37,908 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 346 places, 398 transitions, 826 flow [2022-12-13 22:07:37,908 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 22:07:37,908 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 346 places, 398 transitions, 826 flow [2022-12-13 22:07:37,908 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 346 places, 398 transitions, 826 flow [2022-12-13 22:07:37,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 346 places, 398 transitions, 826 flow [2022-12-13 22:07:37,994 INFO L130 PetriNetUnfolder]: 110/768 cut-off events. [2022-12-13 22:07:37,994 INFO L131 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2022-12-13 22:07:38,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 796 conditions, 768 events. 110/768 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 3789 event pairs, 1 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 529. Up to 16 conditions per place. [2022-12-13 22:07:38,027 INFO L119 LiptonReduction]: Number of co-enabled transitions 92130 [2022-12-13 22:07:42,202 INFO L134 LiptonReduction]: Checked pairs total: 204976 [2022-12-13 22:07:42,202 INFO L136 LiptonReduction]: Total number of compositions: 354 [2022-12-13 22:07:42,204 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 22:07:42,204 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;@3e8c652, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 22:07:42,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-12-13 22:07:42,206 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-12-13 22:07:42,206 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 22:07:42,206 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:07:42,206 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-12-13 22:07:42,206 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 22:07:42,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:07:42,206 INFO L85 PathProgramCache]: Analyzing trace with hash 2429645, now seen corresponding path program 1 times [2022-12-13 22:07:42,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:07:42,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251294974] [2022-12-13 22:07:42,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:07:42,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:07:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:07:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:07:42,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:07:42,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251294974] [2022-12-13 22:07:42,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251294974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:07:42,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:07:42,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:07:42,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048211800] [2022-12-13 22:07:42,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:07:42,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:07:42,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:07:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:07:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:07:42,227 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 333 out of 752 [2022-12-13 22:07:42,228 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 175 transitions, 380 flow. Second operand has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:07:42,228 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:07:42,228 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 333 of 752 [2022-12-13 22:07:42,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:08:57,754 INFO L130 PetriNetUnfolder]: 787009/1131341 cut-off events. [2022-12-13 22:08:57,754 INFO L131 PetriNetUnfolder]: For 6112/6112 co-relation queries the response was YES. [2022-12-13 22:08:59,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170012 conditions, 1131341 events. 787009/1131341 cut-off events. For 6112/6112 co-relation queries the response was YES. Maximal size of possible extension queue 35839. Compared 10843276 event pairs, 758651 based on Foata normal form. 96620/879493 useless extension candidates. Maximal degree in co-relation 239669. Up to 1034997 conditions per place. [2022-12-13 22:09:03,429 INFO L137 encePairwiseOnDemand]: 698/752 looper letters, 96 selfloop transitions, 2 changer transitions 0/125 dead transitions. [2022-12-13 22:09:03,429 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 125 transitions, 476 flow [2022-12-13 22:09:03,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:09:03,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:09:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1149 transitions. [2022-12-13 22:09:03,432 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5093085106382979 [2022-12-13 22:09:03,432 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1149 transitions. [2022-12-13 22:09:03,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1149 transitions. [2022-12-13 22:09:03,432 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:09:03,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1149 transitions. [2022-12-13 22:09:03,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 383.0) internal successors, (1149), 3 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:09:03,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:09:03,436 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:09:03,436 INFO L175 Difference]: Start difference. First operand has 133 places, 175 transitions, 380 flow. Second operand 3 states and 1149 transitions. [2022-12-13 22:09:03,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 125 transitions, 476 flow [2022-12-13 22:09:03,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 125 transitions, 476 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 22:09:03,442 INFO L231 Difference]: Finished difference. Result has 126 places, 125 transitions, 290 flow [2022-12-13 22:09:03,442 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=290, PETRI_PLACES=126, PETRI_TRANSITIONS=125} [2022-12-13 22:09:03,443 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, -7 predicate places. [2022-12-13 22:09:03,443 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 125 transitions, 290 flow [2022-12-13 22:09:03,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 334.0) internal successors, (1002), 3 states have internal predecessors, (1002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:09:03,443 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:09:03,443 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 22:09:03,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-12-13 22:09:03,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 22:09:03,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:09:03,444 INFO L85 PathProgramCache]: Analyzing trace with hash 75296508, now seen corresponding path program 1 times [2022-12-13 22:09:03,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:09:03,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191407441] [2022-12-13 22:09:03,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:09:03,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:09:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:09:03,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:09:03,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:09:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191407441] [2022-12-13 22:09:03,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191407441] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:09:03,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507629981] [2022-12-13 22:09:03,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:09:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:09:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:09:03,464 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:09:03,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-13 22:09:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:09:03,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 22:09:03,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:09:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:09:03,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:09:03,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:09:03,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507629981] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:09:03,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:09:03,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 22:09:03,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145355034] [2022-12-13 22:09:03,546 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:09:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 22:09:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:09:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 22:09:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 22:09:03,557 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 752 [2022-12-13 22:09:03,559 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 125 transitions, 290 flow. Second operand has 7 states, 7 states have (on average 333.2857142857143) internal successors, (2333), 7 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:09:03,559 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:09:03,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 752 [2022-12-13 22:09:03,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:10:20,150 INFO L130 PetriNetUnfolder]: 787009/1131344 cut-off events. [2022-12-13 22:10:20,150 INFO L131 PetriNetUnfolder]: For 6112/6112 co-relation queries the response was YES. [2022-12-13 22:10:22,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2170028 conditions, 1131344 events. 787009/1131344 cut-off events. For 6112/6112 co-relation queries the response was YES. Maximal size of possible extension queue 35839. Compared 10841454 event pairs, 758651 based on Foata normal form. 0/782876 useless extension candidates. Maximal degree in co-relation 2170014. Up to 1034997 conditions per place. [2022-12-13 22:10:26,106 INFO L137 encePairwiseOnDemand]: 749/752 looper letters, 96 selfloop transitions, 5 changer transitions 0/128 dead transitions. [2022-12-13 22:10:26,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 128 transitions, 504 flow [2022-12-13 22:10:26,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 22:10:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 22:10:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2096 transitions. [2022-12-13 22:10:26,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4645390070921986 [2022-12-13 22:10:26,110 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2096 transitions. [2022-12-13 22:10:26,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2096 transitions. [2022-12-13 22:10:26,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:10:26,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2096 transitions. [2022-12-13 22:10:26,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 349.3333333333333) internal successors, (2096), 6 states have internal predecessors, (2096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:10:26,117 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 752.0) internal successors, (5264), 7 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:10:26,117 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 752.0) internal successors, (5264), 7 states have internal predecessors, (5264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:10:26,117 INFO L175 Difference]: Start difference. First operand has 126 places, 125 transitions, 290 flow. Second operand 6 states and 2096 transitions. [2022-12-13 22:10:26,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 128 transitions, 504 flow [2022-12-13 22:10:26,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 128 transitions, 500 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 22:10:26,123 INFO L231 Difference]: Finished difference. Result has 133 places, 128 transitions, 322 flow [2022-12-13 22:10:26,123 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=322, PETRI_PLACES=133, PETRI_TRANSITIONS=128} [2022-12-13 22:10:26,123 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, 0 predicate places. [2022-12-13 22:10:26,123 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 128 transitions, 322 flow [2022-12-13 22:10:26,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 333.2857142857143) internal successors, (2333), 7 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:10:26,124 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:10:26,124 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 22:10:26,128 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-13 22:10:26,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:10:26,325 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 22:10:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:10:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1163042508, now seen corresponding path program 2 times [2022-12-13 22:10:26,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:10:26,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10357664] [2022-12-13 22:10:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:10:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:10:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:10:26,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-12-13 22:10:26,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:10:26,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10357664] [2022-12-13 22:10:26,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10357664] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 22:10:26,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 22:10:26,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 22:10:26,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268084772] [2022-12-13 22:10:26,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 22:10:26,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 22:10:26,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:10:26,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 22:10:26,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 22:10:26,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 329 out of 752 [2022-12-13 22:10:26,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 128 transitions, 322 flow. Second operand has 3 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:10:26,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:10:26,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 329 of 752 [2022-12-13 22:10:26,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 22:11:40,883 INFO L130 PetriNetUnfolder]: 729507/1045181 cut-off events. [2022-12-13 22:11:40,883 INFO L131 PetriNetUnfolder]: For 6114/6114 co-relation queries the response was YES. [2022-12-13 22:11:43,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2010716 conditions, 1045181 events. 729507/1045181 cut-off events. For 6114/6114 co-relation queries the response was YES. Maximal size of possible extension queue 33378. Compared 9944582 event pairs, 649584 based on Foata normal form. 0/731614 useless extension candidates. Maximal degree in co-relation 2010680. Up to 886152 conditions per place. [2022-12-13 22:11:46,923 INFO L137 encePairwiseOnDemand]: 747/752 looper letters, 155 selfloop transitions, 3 changer transitions 0/185 dead transitions. [2022-12-13 22:11:46,923 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 185 transitions, 752 flow [2022-12-13 22:11:46,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 22:11:46,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 22:11:46,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1143 transitions. [2022-12-13 22:11:46,926 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5066489361702128 [2022-12-13 22:11:46,926 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1143 transitions. [2022-12-13 22:11:46,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1143 transitions. [2022-12-13 22:11:46,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 22:11:46,926 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1143 transitions. [2022-12-13 22:11:46,928 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 381.0) internal successors, (1143), 3 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:11:46,929 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:11:46,930 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 752.0) internal successors, (3008), 4 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:11:46,930 INFO L175 Difference]: Start difference. First operand has 133 places, 128 transitions, 322 flow. Second operand 3 states and 1143 transitions. [2022-12-13 22:11:46,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 185 transitions, 752 flow [2022-12-13 22:11:46,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 185 transitions, 738 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 22:11:46,934 INFO L231 Difference]: Finished difference. Result has 132 places, 126 transitions, 310 flow [2022-12-13 22:11:46,934 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=752, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=310, PETRI_PLACES=132, PETRI_TRANSITIONS=126} [2022-12-13 22:11:46,935 INFO L288 CegarLoopForPetriNet]: 133 programPoint places, -1 predicate places. [2022-12-13 22:11:46,935 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 126 transitions, 310 flow [2022-12-13 22:11:46,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 330.3333333333333) internal successors, (991), 3 states have internal predecessors, (991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:11:46,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 22:11:46,935 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-12-13 22:11:46,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-12-13 22:11:46,935 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-12-13 22:11:46,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 22:11:46,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1163042509, now seen corresponding path program 1 times [2022-12-13 22:11:46,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 22:11:46,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123447533] [2022-12-13 22:11:46,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:11:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 22:11:46,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:11:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:11:46,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 22:11:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123447533] [2022-12-13 22:11:46,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123447533] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 22:11:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834455244] [2022-12-13 22:11:46,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 22:11:46,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 22:11:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 22:11:46,974 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 22:11:46,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_25743dcb-b2ae-4358-8a35-50bee79c2115/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-13 22:11:47,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 22:11:47,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 22:11:47,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 22:11:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:11:47,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 22:11:47,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 22:11:47,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834455244] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 22:11:47,088 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 22:11:47,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-13 22:11:47,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570290764] [2022-12-13 22:11:47,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 22:11:47,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-13 22:11:47,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 22:11:47,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-13 22:11:47,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-12-13 22:11:47,104 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 752 [2022-12-13 22:11:47,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 126 transitions, 310 flow. Second operand has 13 states, 13 states have (on average 333.15384615384613) internal successors, (4331), 13 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 22:11:47,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 22:11:47,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 752 [2022-12-13 22:11:47,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand