./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:27:46,921 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:27:46,924 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:27:46,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:27:46,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:27:46,969 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:27:46,972 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:27:46,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:27:46,977 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:27:46,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:27:46,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:27:46,986 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:27:46,986 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:27:46,989 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:27:46,990 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:27:46,992 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:27:46,994 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:27:46,995 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:27:46,997 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:27:47,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:27:47,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:27:47,007 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:27:47,009 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:27:47,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:27:47,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:27:47,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:27:47,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:27:47,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:27:47,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:27:47,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:27:47,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:27:47,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:27:47,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:27:47,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:27:47,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:27:47,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:27:47,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:27:47,032 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:27:47,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:27:47,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:27:47,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:27:47,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:27:47,075 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:27:47,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:27:47,076 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:27:47,077 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:27:47,078 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:27:47,078 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:27:47,079 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:27:47,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:27:47,080 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:27:47,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:27:47,081 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:27:47,082 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:27:47,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:27:47,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:27:47,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:27:47,083 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:27:47,083 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:27:47,084 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:27:47,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:27:47,084 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:27:47,084 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:27:47,085 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:27:47,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:27:47,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:27:47,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:27:47,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:27:47,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:27:47,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:27:47,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:27:47,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:27:47,088 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:27:47,088 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:27:47,089 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:27:47,089 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_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> db5eab03de8fef3e653289c5dcf0b220be6d8b09a4df3c07d6d5a066426e755a [2022-11-25 18:27:47,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:27:47,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:27:47,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:27:47,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:27:47,402 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:27:47,403 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-25 18:27:50,512 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:27:50,798 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:27:50,799 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i [2022-11-25 18:27:50,816 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/data/597995d49/47692a319a244fbab26bf9100ac69875/FLAG581abb990 [2022-11-25 18:27:50,834 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/data/597995d49/47692a319a244fbab26bf9100ac69875 [2022-11-25 18:27:50,837 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:27:50,838 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:27:50,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:27:50,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:27:50,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:27:50,848 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:27:50" (1/1) ... [2022-11-25 18:27:50,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5309f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:50, skipping insertion in model container [2022-11-25 18:27:50,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:27:50" (1/1) ... [2022-11-25 18:27:50,857 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:27:50,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:27:51,379 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_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-25 18:27:51,436 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:27:51,527 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:27:51,565 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_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/sv-benchmarks/c/goblint-regression/28-race_reach_86-lists_racing.i[47038,47051] [2022-11-25 18:27:51,580 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:27:51,647 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:27:51,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51 WrapperNode [2022-11-25 18:27:51,647 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:27:51,648 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:27:51,648 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:27:51,648 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:27:51,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,673 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,716 INFO L138 Inliner]: procedures = 278, calls = 60, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 227 [2022-11-25 18:27:51,717 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:27:51,718 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:27:51,718 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:27:51,718 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:27:51,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,754 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:27:51,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:27:51,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:27:51,761 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:27:51,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (1/1) ... [2022-11-25 18:27:51,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:27:51,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:27:51,794 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:27:51,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:27:51,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:27:51,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 18:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure t1_fun [2022-11-25 18:27:51,844 INFO L138 BoogieDeclarations]: Found implementation of procedure t1_fun [2022-11-25 18:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure t2_fun [2022-11-25 18:27:51,844 INFO L138 BoogieDeclarations]: Found implementation of procedure t2_fun [2022-11-25 18:27:51,844 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 18:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:27:51,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:27:51,845 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:27:51,847 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:27:52,084 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:27:52,086 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:27:52,770 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:27:52,779 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:27:52,780 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-25 18:27:52,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:27:52 BoogieIcfgContainer [2022-11-25 18:27:52,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:27:52,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:27:52,786 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:27:52,789 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:27:52,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:27:50" (1/3) ... [2022-11-25 18:27:52,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61013a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:27:52, skipping insertion in model container [2022-11-25 18:27:52,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:27:51" (2/3) ... [2022-11-25 18:27:52,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61013a02 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:27:52, skipping insertion in model container [2022-11-25 18:27:52,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:27:52" (3/3) ... [2022-11-25 18:27:52,799 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_86-lists_racing.i [2022-11-25 18:27:52,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:27:52,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 44 error locations. [2022-11-25 18:27:52,819 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:27:53,065 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-25 18:27:53,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 287 transitions, 596 flow [2022-11-25 18:27:53,343 INFO L130 PetriNetUnfolder]: 54/537 cut-off events. [2022-11-25 18:27:53,343 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 18:27:53,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 537 events. 54/537 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2462 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2022-11-25 18:27:53,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 287 transitions, 596 flow [2022-11-25 18:27:53,365 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 267 places, 287 transitions, 596 flow [2022-11-25 18:27:53,369 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:27:53,383 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-25 18:27:53,385 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 287 transitions, 596 flow [2022-11-25 18:27:53,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 287 transitions, 596 flow [2022-11-25 18:27:53,478 INFO L130 PetriNetUnfolder]: 54/537 cut-off events. [2022-11-25 18:27:53,479 INFO L131 PetriNetUnfolder]: For 8/16 co-relation queries the response was YES. [2022-11-25 18:27:53,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 557 conditions, 537 events. 54/537 cut-off events. For 8/16 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 2462 event pairs, 0 based on Foata normal form. 0/391 useless extension candidates. Maximal degree in co-relation 272. Up to 8 conditions per place. [2022-11-25 18:27:53,505 INFO L119 LiptonReduction]: Number of co-enabled transitions 27012 [2022-11-25 18:28:18,691 INFO L134 LiptonReduction]: Checked pairs total: 63208 [2022-11-25 18:28:18,691 INFO L136 LiptonReduction]: Total number of compositions: 261 [2022-11-25 18:28:18,729 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:28:18,739 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;@1ca5a8fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:28:18,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 75 error locations. [2022-11-25 18:28:18,742 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 18:28:18,743 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:28:18,743 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:18,744 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:28:18,745 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:28:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash 36150, now seen corresponding path program 1 times [2022-11-25 18:28:18,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:18,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752621757] [2022-11-25 18:28:18,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:18,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:18,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752621757] [2022-11-25 18:28:18,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752621757] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:28:18,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:28:18,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:28:18,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851537208] [2022-11-25 18:28:18,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:28:19,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:28:19,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:19,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:28:19,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:28:19,038 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 548 [2022-11-25 18:28:19,045 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 250 flow. Second operand has 2 states, 2 states have (on average 264.0) internal successors, (528), 2 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:19,046 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:19,046 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 548 [2022-11-25 18:28:19,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:23,013 INFO L130 PetriNetUnfolder]: 18093/31373 cut-off events. [2022-11-25 18:28:23,013 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-25 18:28:23,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59180 conditions, 31373 events. 18093/31373 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 1022. Compared 252221 event pairs, 17344 based on Foata normal form. 1304/17107 useless extension candidates. Maximal degree in co-relation 56426. Up to 27656 conditions per place. [2022-11-25 18:28:23,263 INFO L137 encePairwiseOnDemand]: 533/548 looper letters, 80 selfloop transitions, 0 changer transitions 0/99 dead transitions. [2022-11-25 18:28:23,263 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 99 transitions, 380 flow [2022-11-25 18:28:23,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:28:23,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:28:23,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 621 transitions. [2022-11-25 18:28:23,285 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5666058394160584 [2022-11-25 18:28:23,286 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 621 transitions. [2022-11-25 18:28:23,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 621 transitions. [2022-11-25 18:28:23,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:23,294 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 621 transitions. [2022-11-25 18:28:23,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 310.5) internal successors, (621), 2 states have internal predecessors, (621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:23,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 548.0) internal successors, (1644), 3 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:23,312 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 548.0) internal successors, (1644), 3 states have internal predecessors, (1644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:23,314 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 250 flow. Second operand 2 states and 621 transitions. [2022-11-25 18:28:23,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 99 transitions, 380 flow [2022-11-25 18:28:23,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 99 transitions, 380 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:28:23,339 INFO L231 Difference]: Finished difference. Result has 98 places, 99 transitions, 220 flow [2022-11-25 18:28:23,341 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=220, PETRI_PLACES=98, PETRI_TRANSITIONS=99} [2022-11-25 18:28:23,345 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, -3 predicate places. [2022-11-25 18:28:23,345 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 99 transitions, 220 flow [2022-11-25 18:28:23,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 264.0) internal successors, (528), 2 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:23,346 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:23,346 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:28:23,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:28:23,347 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:28:23,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:23,349 INFO L85 PathProgramCache]: Analyzing trace with hash 36145, now seen corresponding path program 1 times [2022-11-25 18:28:23,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:23,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500822918] [2022-11-25 18:28:23,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:23,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:23,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:23,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:23,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500822918] [2022-11-25 18:28:23,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500822918] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:28:23,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:28:23,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:28:23,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494315531] [2022-11-25 18:28:23,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:28:23,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:28:23,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:23,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:28:23,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:28:23,963 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 548 [2022-11-25 18:28:23,965 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 99 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:23,965 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:23,965 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 548 [2022-11-25 18:28:23,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:27,455 INFO L130 PetriNetUnfolder]: 18093/31374 cut-off events. [2022-11-25 18:28:27,456 INFO L131 PetriNetUnfolder]: For 159/159 co-relation queries the response was YES. [2022-11-25 18:28:27,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59183 conditions, 31374 events. 18093/31374 cut-off events. For 159/159 co-relation queries the response was YES. Maximal size of possible extension queue 1048. Compared 252368 event pairs, 17344 based on Foata normal form. 0/15804 useless extension candidates. Maximal degree in co-relation 59178. Up to 27656 conditions per place. [2022-11-25 18:28:27,634 INFO L137 encePairwiseOnDemand]: 543/548 looper letters, 79 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2022-11-25 18:28:27,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 100 transitions, 384 flow [2022-11-25 18:28:27,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:28:27,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:28:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 846 transitions. [2022-11-25 18:28:27,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5145985401459854 [2022-11-25 18:28:27,639 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 846 transitions. [2022-11-25 18:28:27,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 846 transitions. [2022-11-25 18:28:27,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:27,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 846 transitions. [2022-11-25 18:28:27,643 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 282.0) internal successors, (846), 3 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:27,648 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:27,650 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:27,650 INFO L175 Difference]: Start difference. First operand has 98 places, 99 transitions, 220 flow. Second operand 3 states and 846 transitions. [2022-11-25 18:28:27,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 100 transitions, 384 flow [2022-11-25 18:28:27,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 100 transitions, 384 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:28:27,662 INFO L231 Difference]: Finished difference. Result has 101 places, 100 transitions, 236 flow [2022-11-25 18:28:27,662 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=236, PETRI_PLACES=101, PETRI_TRANSITIONS=100} [2022-11-25 18:28:27,663 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 0 predicate places. [2022-11-25 18:28:27,663 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 100 transitions, 236 flow [2022-11-25 18:28:27,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.66666666666666) internal successors, (764), 3 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:27,664 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:27,664 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:28:27,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:28:27,665 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:28:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:27,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1121951, now seen corresponding path program 1 times [2022-11-25 18:28:27,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:27,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772877307] [2022-11-25 18:28:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:27,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:28,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:28,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772877307] [2022-11-25 18:28:28,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772877307] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:28,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227393180] [2022-11-25 18:28:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:28,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:28,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:28,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:28,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:28:28,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:28,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:28:28,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:28,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:28:28,508 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:28:28,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:28,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:30,666 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:28:30,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-25 18:28:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:34,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227393180] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:34,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:34,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:28:34,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782629053] [2022-11-25 18:28:34,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:34,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:28:34,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:34,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:28:34,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:28:37,324 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 548 [2022-11-25 18:28:37,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 100 transitions, 236 flow. Second operand has 8 states, 8 states have (on average 245.125) internal successors, (1961), 8 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:37,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:37,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 548 [2022-11-25 18:28:37,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:45,309 INFO L130 PetriNetUnfolder]: 45067/76945 cut-off events. [2022-11-25 18:28:45,309 INFO L131 PetriNetUnfolder]: For 477/477 co-relation queries the response was YES. [2022-11-25 18:28:45,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146033 conditions, 76945 events. 45067/76945 cut-off events. For 477/477 co-relation queries the response was YES. Maximal size of possible extension queue 2417. Compared 693857 event pairs, 37272 based on Foata normal form. 0/37299 useless extension candidates. Maximal degree in co-relation 146026. Up to 28736 conditions per place. [2022-11-25 18:28:45,662 INFO L137 encePairwiseOnDemand]: 542/548 looper letters, 223 selfloop transitions, 7 changer transitions 0/249 dead transitions. [2022-11-25 18:28:45,662 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 249 transitions, 1044 flow [2022-11-25 18:28:45,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:28:45,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:28:45,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1699 transitions. [2022-11-25 18:28:45,675 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5167274939172749 [2022-11-25 18:28:45,675 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1699 transitions. [2022-11-25 18:28:45,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1699 transitions. [2022-11-25 18:28:45,676 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:45,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1699 transitions. [2022-11-25 18:28:45,680 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 283.1666666666667) internal successors, (1699), 6 states have internal predecessors, (1699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:45,686 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:45,688 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 548.0) internal successors, (3836), 7 states have internal predecessors, (3836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:45,689 INFO L175 Difference]: Start difference. First operand has 101 places, 100 transitions, 236 flow. Second operand 6 states and 1699 transitions. [2022-11-25 18:28:45,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 249 transitions, 1044 flow [2022-11-25 18:28:45,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 249 transitions, 1040 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:28:45,698 INFO L231 Difference]: Finished difference. Result has 108 places, 105 transitions, 284 flow [2022-11-25 18:28:45,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=284, PETRI_PLACES=108, PETRI_TRANSITIONS=105} [2022-11-25 18:28:45,699 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 7 predicate places. [2022-11-25 18:28:45,700 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 105 transitions, 284 flow [2022-11-25 18:28:45,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 245.125) internal successors, (1961), 8 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:45,701 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:45,701 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-25 18:28:45,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:45,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:45,917 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:28:45,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:45,918 INFO L85 PathProgramCache]: Analyzing trace with hash 34781940, now seen corresponding path program 1 times [2022-11-25 18:28:45,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:45,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773419945] [2022-11-25 18:28:45,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:45,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:45,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:28:46,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:46,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773419945] [2022-11-25 18:28:46,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773419945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:28:46,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:28:46,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:28:46,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344312674] [2022-11-25 18:28:46,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:28:46,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:28:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:46,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:28:46,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:28:46,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 548 [2022-11-25 18:28:46,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 105 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:46,213 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:46,213 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 548 [2022-11-25 18:28:46,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:52,774 INFO L130 PetriNetUnfolder]: 45566/78515 cut-off events. [2022-11-25 18:28:52,775 INFO L131 PetriNetUnfolder]: For 1907/1907 co-relation queries the response was YES. [2022-11-25 18:28:52,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151162 conditions, 78515 events. 45566/78515 cut-off events. For 1907/1907 co-relation queries the response was YES. Maximal size of possible extension queue 2548. Compared 720309 event pairs, 36064 based on Foata normal form. 0/41445 useless extension candidates. Maximal degree in co-relation 151152. Up to 60818 conditions per place. [2022-11-25 18:28:53,323 INFO L137 encePairwiseOnDemand]: 540/548 looper letters, 125 selfloop transitions, 7 changer transitions 0/151 dead transitions. [2022-11-25 18:28:53,323 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 151 transitions, 636 flow [2022-11-25 18:28:53,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:28:53,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:28:53,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 891 transitions. [2022-11-25 18:28:53,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.541970802919708 [2022-11-25 18:28:53,328 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 891 transitions. [2022-11-25 18:28:53,329 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 891 transitions. [2022-11-25 18:28:53,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:53,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 891 transitions. [2022-11-25 18:28:53,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 297.0) internal successors, (891), 3 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:53,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:53,338 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 548.0) internal successors, (2192), 4 states have internal predecessors, (2192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:53,338 INFO L175 Difference]: Start difference. First operand has 108 places, 105 transitions, 284 flow. Second operand 3 states and 891 transitions. [2022-11-25 18:28:53,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 151 transitions, 636 flow [2022-11-25 18:28:53,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 151 transitions, 630 flow, removed 2 selfloop flow, removed 1 redundant places. [2022-11-25 18:28:53,356 INFO L231 Difference]: Finished difference. Result has 110 places, 107 transitions, 316 flow [2022-11-25 18:28:53,357 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=316, PETRI_PLACES=110, PETRI_TRANSITIONS=107} [2022-11-25 18:28:53,358 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 9 predicate places. [2022-11-25 18:28:53,359 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 107 transitions, 316 flow [2022-11-25 18:28:53,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 255.33333333333334) internal successors, (766), 3 states have internal predecessors, (766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:53,359 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:53,360 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2022-11-25 18:28:53,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:28:53,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:28:53,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:53,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1078239598, now seen corresponding path program 1 times [2022-11-25 18:28:53,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:53,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108161574] [2022-11-25 18:28:53,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:53,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:53,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:53,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:53,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108161574] [2022-11-25 18:28:53,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108161574] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:53,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907636452] [2022-11-25 18:28:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:53,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:53,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:53,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:53,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:28:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:53,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:28:53,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:53,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:53,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:28:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:53,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907636452] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:28:53,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:28:53,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-25 18:28:53,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071550723] [2022-11-25 18:28:53,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:28:53,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:28:53,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:28:53,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:28:53,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:28:53,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 258 out of 548 [2022-11-25 18:28:53,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 107 transitions, 316 flow. Second operand has 9 states, 9 states have (on average 259.22222222222223) internal successors, (2333), 9 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) [2022-11-25 18:28:53,741 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:28:53,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 258 of 548 [2022-11-25 18:28:53,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:28:57,338 INFO L130 PetriNetUnfolder]: 21011/36823 cut-off events. [2022-11-25 18:28:57,338 INFO L131 PetriNetUnfolder]: For 6543/6543 co-relation queries the response was YES. [2022-11-25 18:28:57,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73936 conditions, 36823 events. 21011/36823 cut-off events. For 6543/6543 co-relation queries the response was YES. Maximal size of possible extension queue 1271. Compared 308849 event pairs, 19432 based on Foata normal form. 4/21501 useless extension candidates. Maximal degree in co-relation 73924. Up to 32395 conditions per place. [2022-11-25 18:28:57,497 INFO L137 encePairwiseOnDemand]: 544/548 looper letters, 82 selfloop transitions, 8 changer transitions 0/109 dead transitions. [2022-11-25 18:28:57,498 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 109 transitions, 510 flow [2022-11-25 18:28:57,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:28:57,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:28:57,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2155 transitions. [2022-11-25 18:28:57,505 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4915602189781022 [2022-11-25 18:28:57,505 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2155 transitions. [2022-11-25 18:28:57,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2155 transitions. [2022-11-25 18:28:57,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:28:57,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2155 transitions. [2022-11-25 18:28:57,511 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 269.375) internal successors, (2155), 8 states have internal predecessors, (2155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:57,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:57,520 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 548.0) internal successors, (4932), 9 states have internal predecessors, (4932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:28:57,520 INFO L175 Difference]: Start difference. First operand has 110 places, 107 transitions, 316 flow. Second operand 8 states and 2155 transitions. [2022-11-25 18:28:57,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 109 transitions, 510 flow [2022-11-25 18:28:57,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 109 transitions, 490 flow, removed 5 selfloop flow, removed 2 redundant places. [2022-11-25 18:28:57,549 INFO L231 Difference]: Finished difference. Result has 120 places, 108 transitions, 340 flow [2022-11-25 18:28:57,549 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=340, PETRI_PLACES=120, PETRI_TRANSITIONS=108} [2022-11-25 18:28:57,552 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 19 predicate places. [2022-11-25 18:28:57,552 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 108 transitions, 340 flow [2022-11-25 18:28:57,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 259.22222222222223) internal successors, (2333), 9 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) [2022-11-25 18:28:57,553 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:28:57,554 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:28:57,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:28:57,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:57,759 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:28:57,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:28:57,760 INFO L85 PathProgramCache]: Analyzing trace with hash -934250319, now seen corresponding path program 2 times [2022-11-25 18:28:57,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:28:57,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122387746] [2022-11-25 18:28:57,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:28:57,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:28:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:28:58,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:58,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:28:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122387746] [2022-11-25 18:28:58,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122387746] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:28:58,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893874695] [2022-11-25 18:28:58,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:28:58,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:28:58,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:28:58,675 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:28:58,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:28:58,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:28:58,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:28:58,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-25 18:28:58,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:28:58,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:28:58,954 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:28:59,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:28:59,005 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:28:59,014 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:28:59,015 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 [2022-11-25 18:28:59,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:28:59,062 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:28:59,072 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:28:59,072 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 [2022-11-25 18:28:59,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:28:59,126 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 18:28:59,136 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-25 18:28:59,136 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 [2022-11-25 18:28:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:28:59,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:03,315 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:03,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 64 [2022-11-25 18:29:07,555 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:07,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 70 [2022-11-25 18:29:09,757 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:09,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 76 [2022-11-25 18:29:13,967 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-25 18:29:13,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 82 [2022-11-25 18:29:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:18,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893874695] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:18,361 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:29:18,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2022-11-25 18:29:18,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701234816] [2022-11-25 18:29:18,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:18,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:29:18,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:18,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:29:18,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:29:22,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:29:33,300 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 244 out of 548 [2022-11-25 18:29:33,303 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 108 transitions, 340 flow. Second operand has 17 states, 17 states have (on average 245.05882352941177) internal successors, (4166), 17 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:33,303 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:33,304 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 244 of 548 [2022-11-25 18:29:33,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:29:36,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:29:38,142 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:29:48,140 INFO L130 PetriNetUnfolder]: 45810/79345 cut-off events. [2022-11-25 18:29:48,140 INFO L131 PetriNetUnfolder]: For 4865/4865 co-relation queries the response was YES. [2022-11-25 18:29:48,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154970 conditions, 79345 events. 45810/79345 cut-off events. For 4865/4865 co-relation queries the response was YES. Maximal size of possible extension queue 2449. Compared 730042 event pairs, 33586 based on Foata normal form. 6/44703 useless extension candidates. Maximal degree in co-relation 154954. Up to 33416 conditions per place. [2022-11-25 18:29:48,481 INFO L137 encePairwiseOnDemand]: 543/548 looper letters, 261 selfloop transitions, 15 changer transitions 0/295 dead transitions. [2022-11-25 18:29:48,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 295 transitions, 1386 flow [2022-11-25 18:29:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:29:48,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:29:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3207 transitions. [2022-11-25 18:29:48,490 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4876824817518248 [2022-11-25 18:29:48,490 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3207 transitions. [2022-11-25 18:29:48,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3207 transitions. [2022-11-25 18:29:48,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:29:48,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3207 transitions. [2022-11-25 18:29:48,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 267.25) internal successors, (3207), 12 states have internal predecessors, (3207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:48,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:48,514 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 548.0) internal successors, (7124), 13 states have internal predecessors, (7124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:48,514 INFO L175 Difference]: Start difference. First operand has 120 places, 108 transitions, 340 flow. Second operand 12 states and 3207 transitions. [2022-11-25 18:29:48,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 295 transitions, 1386 flow [2022-11-25 18:29:48,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 295 transitions, 1345 flow, removed 12 selfloop flow, removed 8 redundant places. [2022-11-25 18:29:48,527 INFO L231 Difference]: Finished difference. Result has 127 places, 115 transitions, 389 flow [2022-11-25 18:29:48,527 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=548, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=389, PETRI_PLACES=127, PETRI_TRANSITIONS=115} [2022-11-25 18:29:48,528 INFO L288 CegarLoopForPetriNet]: 101 programPoint places, 26 predicate places. [2022-11-25 18:29:48,528 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 115 transitions, 389 flow [2022-11-25 18:29:48,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 245.05882352941177) internal successors, (4166), 17 states have internal predecessors, (4166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:48,530 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:29:48,530 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1] [2022-11-25 18:29:48,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-25 18:29:48,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:29:48,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [t2_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, t2_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 72 more)] === [2022-11-25 18:29:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash -861731346, now seen corresponding path program 2 times [2022-11-25 18:29:48,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:48,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83761401] [2022-11-25 18:29:48,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:29:48,952 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:29:48,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:48,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83761401] [2022-11-25 18:29:48,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83761401] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:29:48,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837353381] [2022-11-25 18:29:48,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:29:48,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:48,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:48,955 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:48,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b9160cf0-9010-4f9f-82dc-ce3a3895ef50/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:29:49,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:29:49,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:29:49,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:49,145 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 18:29:49,164 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-25 18:29:49,164 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:29:49,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837353381] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:29:49,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:29:49,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [8] total 10 [2022-11-25 18:29:49,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003794226] [2022-11-25 18:29:49,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:29:49,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:29:49,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:29:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:29:49,311 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 548 [2022-11-25 18:29:49,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 115 transitions, 389 flow. Second operand has 3 states, 3 states have (on average 257.3333333333333) internal successors, (772), 3 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:29:49,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:29:49,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 548 [2022-11-25 18:29:49,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand