./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.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_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/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_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/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_b88383ea-8fd3-4e70-af48-1372d3840711/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 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:33:42,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:33:42,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:33:42,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:33:42,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:33:42,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:33:42,792 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:33:42,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:33:42,799 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:33:42,806 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:33:42,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:33:42,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:33:42,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:33:42,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:33:42,820 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:33:42,821 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:33:42,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:33:42,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:33:42,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:33:42,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:33:42,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:33:42,839 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:33:42,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:33:42,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:33:42,855 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:33:42,856 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:33:42,856 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:33:42,858 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:33:42,859 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:33:42,860 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:33:42,861 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:33:42,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:33:42,865 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:33:42,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:33:42,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:33:42,869 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:33:42,870 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:33:42,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:33:42,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:33:42,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:33:42,872 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:33:42,873 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 17:33:42,921 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:33:42,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:33:42,922 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:33:42,922 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:33:42,923 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:33:42,923 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:33:42,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:33:42,925 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:33:42,925 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:33:42,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:33:42,926 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:33:42,927 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 17:33:42,927 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:33:42,927 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:33:42,928 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:33:42,928 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 17:33:42,928 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 17:33:42,928 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 17:33:42,929 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:33:42,929 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 17:33:42,929 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:33:42,929 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:33:42,930 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:33:42,930 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:33:42,930 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:33:42,930 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:33:42,931 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:33:42,931 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:33:42,931 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:33:42,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:33:42,932 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:33:42,932 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:33:42,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:33:42,933 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_b88383ea-8fd3-4e70-af48-1372d3840711/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3c0354ee6107efc04d15102ecf9eef73430e38e14b70f16419cd07cd733fd0df [2022-11-25 17:33:43,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:33:43,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:33:43,306 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:33:43,308 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:33:43,309 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:33:43,310 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-11-25 17:33:46,740 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:33:47,191 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:33:47,192 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i [2022-11-25 17:33:47,225 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/data/a78ebea0c/05fc67bada0d474593fc1001b2fa411d/FLAG64490eb32 [2022-11-25 17:33:47,241 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/data/a78ebea0c/05fc67bada0d474593fc1001b2fa411d [2022-11-25 17:33:47,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:33:47,249 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:33:47,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:33:47,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:33:47,257 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:33:47,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:33:47" (1/1) ... [2022-11-25 17:33:47,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e277856 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:47, skipping insertion in model container [2022-11-25 17:33:47,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:33:47" (1/1) ... [2022-11-25 17:33:47,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:33:47,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:33:47,986 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_b88383ea-8fd3-4e70-af48-1372d3840711/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-11-25 17:33:48,063 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:33:48,097 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:33:48,168 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_b88383ea-8fd3-4e70-af48-1372d3840711/sv-benchmarks/c/goblint-regression/28-race_reach_75-tricky_address2_racefree.i[41323,41336] [2022-11-25 17:33:48,196 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:33:48,294 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:33:48,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48 WrapperNode [2022-11-25 17:33:48,295 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:33:48,296 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:33:48,297 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:33:48,297 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:33:48,306 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,340 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,403 INFO L138 Inliner]: procedures = 270, calls = 41, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 186 [2022-11-25 17:33:48,403 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:33:48,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:33:48,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:33:48,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:33:48,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,434 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,434 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,442 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,465 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,467 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,469 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:33:48,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:33:48,482 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:33:48,482 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:33:48,483 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (1/1) ... [2022-11-25 17:33:48,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:33:48,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:48,536 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:33:48,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:33:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:33:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:33:48,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:33:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:33:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 17:33:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:33:48,606 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 17:33:48,606 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 17:33:48,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:33:48,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:33:48,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:33:48,609 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 17:33:48,865 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:33:48,868 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:33:49,360 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:33:49,375 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:33:49,375 INFO L300 CfgBuilder]: Removed 23 assume(true) statements. [2022-11-25 17:33:49,382 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:33:49 BoogieIcfgContainer [2022-11-25 17:33:49,383 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:33:49,388 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:33:49,389 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:33:49,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:33:49,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:33:47" (1/3) ... [2022-11-25 17:33:49,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70014c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:33:49, skipping insertion in model container [2022-11-25 17:33:49,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:33:48" (2/3) ... [2022-11-25 17:33:49,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@70014c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:33:49, skipping insertion in model container [2022-11-25 17:33:49,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:33:49" (3/3) ... [2022-11-25 17:33:49,404 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_75-tricky_address2_racefree.i [2022-11-25 17:33:49,430 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:33:49,431 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 27 error locations. [2022-11-25 17:33:49,431 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 17:33:49,636 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-25 17:33:49,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-11-25 17:33:49,953 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-11-25 17:33:49,953 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-25 17:33:49,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1206 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-11-25 17:33:49,966 INFO L82 GeneralOperation]: Start removeDead. Operand has 197 places, 225 transitions, 458 flow [2022-11-25 17:33:49,989 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 197 places, 225 transitions, 458 flow [2022-11-25 17:33:49,994 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:33:50,023 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 197 places, 225 transitions, 458 flow [2022-11-25 17:33:50,027 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 197 places, 225 transitions, 458 flow [2022-11-25 17:33:50,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 197 places, 225 transitions, 458 flow [2022-11-25 17:33:50,134 INFO L130 PetriNetUnfolder]: 45/314 cut-off events. [2022-11-25 17:33:50,134 INFO L131 PetriNetUnfolder]: For 1/2 co-relation queries the response was YES. [2022-11-25 17:33:50,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 314 events. 45/314 cut-off events. For 1/2 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1206 event pairs, 0 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 174. Up to 8 conditions per place. [2022-11-25 17:33:50,146 INFO L119 LiptonReduction]: Number of co-enabled transitions 15200 [2022-11-25 17:33:57,013 INFO L134 LiptonReduction]: Checked pairs total: 28792 [2022-11-25 17:33:57,013 INFO L136 LiptonReduction]: Total number of compositions: 219 [2022-11-25 17:33:57,031 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:33:57,038 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;@3afea700, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:33:57,039 INFO L358 AbstractCegarLoop]: Starting to check reachability of 39 error locations. [2022-11-25 17:33:57,042 INFO L130 PetriNetUnfolder]: 1/3 cut-off events. [2022-11-25 17:33:57,042 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:33:57,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:57,043 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:33:57,044 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 17:33:57,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:57,050 INFO L85 PathProgramCache]: Analyzing trace with hash 896148, now seen corresponding path program 1 times [2022-11-25 17:33:57,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:57,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167320631] [2022-11-25 17:33:57,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:57,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:57,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:57,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167320631] [2022-11-25 17:33:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167320631] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:57,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:57,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:33:57,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739356945] [2022-11-25 17:33:57,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:57,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:33:57,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:33:57,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:33:57,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 444 [2022-11-25 17:33:57,451 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 93 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:57,451 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:57,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 444 [2022-11-25 17:33:57,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:57,824 INFO L130 PetriNetUnfolder]: 601/1383 cut-off events. [2022-11-25 17:33:57,824 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:33:57,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2575 conditions, 1383 events. 601/1383 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8877 event pairs, 551 based on Foata normal form. 102/1057 useless extension candidates. Maximal degree in co-relation 2493. Up to 1185 conditions per place. [2022-11-25 17:33:57,838 INFO L137 encePairwiseOnDemand]: 414/444 looper letters, 53 selfloop transitions, 2 changer transitions 0/67 dead transitions. [2022-11-25 17:33:57,839 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 67 transitions, 252 flow [2022-11-25 17:33:57,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:33:57,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:33:57,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 653 transitions. [2022-11-25 17:33:57,863 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49024024024024027 [2022-11-25 17:33:57,864 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 653 transitions. [2022-11-25 17:33:57,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 653 transitions. [2022-11-25 17:33:57,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:57,872 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 653 transitions. [2022-11-25 17:33:57,878 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 217.66666666666666) internal successors, (653), 3 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:57,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:57,894 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:57,896 INFO L175 Difference]: Start difference. First operand has 71 places, 93 transitions, 194 flow. Second operand 3 states and 653 transitions. [2022-11-25 17:33:57,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 67 transitions, 252 flow [2022-11-25 17:33:57,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:33:57,903 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 152 flow [2022-11-25 17:33:57,905 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2022-11-25 17:33:57,909 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -3 predicate places. [2022-11-25 17:33:57,909 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 152 flow [2022-11-25 17:33:57,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 191.0) internal successors, (573), 3 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:57,910 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:57,910 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:33:57,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:33:57,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 17:33:57,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:57,912 INFO L85 PathProgramCache]: Analyzing trace with hash 27754174, now seen corresponding path program 1 times [2022-11-25 17:33:57,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:57,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391419843] [2022-11-25 17:33:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:57,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:57,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:57,989 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:57,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:57,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391419843] [2022-11-25 17:33:57,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391419843] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:57,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093140788] [2022-11-25 17:33:57,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:57,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:57,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:57,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:33:58,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:33:58,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:58,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:33:58,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:58,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:33:58,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093140788] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:58,235 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:33:58,235 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 17:33:58,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679950408] [2022-11-25 17:33:58,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:58,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:33:58,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:58,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:33:58,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:33:58,292 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 444 [2022-11-25 17:33:58,294 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 152 flow. Second operand has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:58,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:58,294 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 444 [2022-11-25 17:33:58,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:58,690 INFO L130 PetriNetUnfolder]: 601/1386 cut-off events. [2022-11-25 17:33:58,690 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 17:33:58,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1386 events. 601/1386 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8864 event pairs, 551 based on Foata normal form. 0/958 useless extension candidates. Maximal degree in co-relation 2579. Up to 1185 conditions per place. [2022-11-25 17:33:58,701 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 53 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2022-11-25 17:33:58,701 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 70 transitions, 280 flow [2022-11-25 17:33:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:33:58,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:33:58,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1195 transitions. [2022-11-25 17:33:58,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4485735735735736 [2022-11-25 17:33:58,706 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1195 transitions. [2022-11-25 17:33:58,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1195 transitions. [2022-11-25 17:33:58,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:58,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1195 transitions. [2022-11-25 17:33:58,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 199.16666666666666) internal successors, (1195), 6 states have internal predecessors, (1195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:58,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:58,720 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 444.0) internal successors, (3108), 7 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:58,720 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 152 flow. Second operand 6 states and 1195 transitions. [2022-11-25 17:33:58,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 70 transitions, 280 flow [2022-11-25 17:33:58,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 70 transitions, 276 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:33:58,725 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 184 flow [2022-11-25 17:33:58,725 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=184, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2022-11-25 17:33:58,726 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 4 predicate places. [2022-11-25 17:33:58,726 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 184 flow [2022-11-25 17:33:58,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 190.28571428571428) internal successors, (1332), 7 states have internal predecessors, (1332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:58,728 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:58,729 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 17:33:58,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:33:58,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:58,947 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 17:33:58,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:58,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2130258030, now seen corresponding path program 2 times [2022-11-25 17:33:58,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:58,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793076961] [2022-11-25 17:33:58,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:58,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:33:59,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:59,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793076961] [2022-11-25 17:33:59,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793076961] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:33:59,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:33:59,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:33:59,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531300946] [2022-11-25 17:33:59,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:33:59,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:33:59,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:59,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:33:59,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:33:59,162 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 186 out of 444 [2022-11-25 17:33:59,164 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 184 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:59,164 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:59,164 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 186 of 444 [2022-11-25 17:33:59,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:33:59,424 INFO L130 PetriNetUnfolder]: 559/1287 cut-off events. [2022-11-25 17:33:59,424 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-25 17:33:59,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2425 conditions, 1287 events. 559/1287 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8120 event pairs, 475 based on Foata normal form. 0/912 useless extension candidates. Maximal degree in co-relation 2391. Up to 1022 conditions per place. [2022-11-25 17:33:59,433 INFO L137 encePairwiseOnDemand]: 439/444 looper letters, 72 selfloop transitions, 3 changer transitions 0/87 dead transitions. [2022-11-25 17:33:59,433 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 87 transitions, 368 flow [2022-11-25 17:33:59,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:33:59,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:33:59,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 631 transitions. [2022-11-25 17:33:59,436 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47372372372372373 [2022-11-25 17:33:59,437 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 631 transitions. [2022-11-25 17:33:59,437 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 631 transitions. [2022-11-25 17:33:59,437 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:33:59,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 631 transitions. [2022-11-25 17:33:59,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 210.33333333333334) internal successors, (631), 3 states have internal predecessors, (631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:59,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:59,444 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:59,445 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 184 flow. Second operand 3 states and 631 transitions. [2022-11-25 17:33:59,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 87 transitions, 368 flow [2022-11-25 17:33:59,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 87 transitions, 354 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:33:59,449 INFO L231 Difference]: Finished difference. Result has 74 places, 68 transitions, 172 flow [2022-11-25 17:33:59,450 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=74, PETRI_TRANSITIONS=68} [2022-11-25 17:33:59,450 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2022-11-25 17:33:59,451 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 68 transitions, 172 flow [2022-11-25 17:33:59,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:59,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:33:59,452 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 17:33:59,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 17:33:59,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 17:33:59,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:33:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash -2130258028, now seen corresponding path program 1 times [2022-11-25 17:33:59,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:33:59,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157929171] [2022-11-25 17:33:59,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:59,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:33:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:59,553 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 17:33:59,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:33:59,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157929171] [2022-11-25 17:33:59,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157929171] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:33:59,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834852564] [2022-11-25 17:33:59,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:33:59,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:33:59,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:33:59,557 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:33:59,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:33:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:33:59,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:33:59,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:33:59,693 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 17:33:59,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:33:59,761 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 17:33:59,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834852564] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:33:59,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:33:59,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:33:59,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471481710] [2022-11-25 17:33:59,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:33:59,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:33:59,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:33:59,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:33:59,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:33:59,823 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 444 [2022-11-25 17:33:59,827 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 68 transitions, 172 flow. Second operand has 13 states, 13 states have (on average 190.15384615384616) internal successors, (2472), 13 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:33:59,827 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:33:59,827 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 444 [2022-11-25 17:33:59,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:00,200 INFO L130 PetriNetUnfolder]: 561/1301 cut-off events. [2022-11-25 17:34:00,201 INFO L131 PetriNetUnfolder]: For 60/60 co-relation queries the response was YES. [2022-11-25 17:34:00,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 1301 events. 561/1301 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8141 event pairs, 513 based on Foata normal form. 6/953 useless extension candidates. Maximal degree in co-relation 2442. Up to 1105 conditions per place. [2022-11-25 17:34:00,209 INFO L137 encePairwiseOnDemand]: 441/444 looper letters, 51 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2022-11-25 17:34:00,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 332 flow [2022-11-25 17:34:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:34:00,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:34:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2336 transitions. [2022-11-25 17:34:00,216 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43843843843843844 [2022-11-25 17:34:00,216 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2336 transitions. [2022-11-25 17:34:00,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2336 transitions. [2022-11-25 17:34:00,218 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:00,218 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2336 transitions. [2022-11-25 17:34:00,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 194.66666666666666) internal successors, (2336), 12 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:00,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 444.0) internal successors, (5772), 13 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:00,239 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 444.0) internal successors, (5772), 13 states have internal predecessors, (5772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:00,240 INFO L175 Difference]: Start difference. First operand has 74 places, 68 transitions, 172 flow. Second operand 12 states and 2336 transitions. [2022-11-25 17:34:00,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 332 flow [2022-11-25 17:34:00,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 326 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:34:00,247 INFO L231 Difference]: Finished difference. Result has 89 places, 74 transitions, 250 flow [2022-11-25 17:34:00,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=250, PETRI_PLACES=89, PETRI_TRANSITIONS=74} [2022-11-25 17:34:00,248 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 18 predicate places. [2022-11-25 17:34:00,248 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 74 transitions, 250 flow [2022-11-25 17:34:00,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 190.15384615384616) internal successors, (2472), 13 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:00,250 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:00,250 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1] [2022-11-25 17:34:00,257 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:00,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:00,457 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 17:34:00,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:00,457 INFO L85 PathProgramCache]: Analyzing trace with hash 684673044, now seen corresponding path program 2 times [2022-11-25 17:34:00,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:00,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915148238] [2022-11-25 17:34:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:00,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:00,597 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:00,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:00,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915148238] [2022-11-25 17:34:00,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915148238] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:00,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:00,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:34:00,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360266234] [2022-11-25 17:34:00,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:00,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:00,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:00,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:00,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:34:00,685 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 444 [2022-11-25 17:34:00,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 74 transitions, 250 flow. Second operand has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:00,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:00,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 444 [2022-11-25 17:34:00,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:01,014 INFO L130 PetriNetUnfolder]: 561/1265 cut-off events. [2022-11-25 17:34:01,015 INFO L131 PetriNetUnfolder]: For 32/32 co-relation queries the response was YES. [2022-11-25 17:34:01,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2433 conditions, 1265 events. 561/1265 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7889 event pairs, 260 based on Foata normal form. 0/898 useless extension candidates. Maximal degree in co-relation 2357. Up to 1072 conditions per place. [2022-11-25 17:34:01,023 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 80 selfloop transitions, 2 changer transitions 0/94 dead transitions. [2022-11-25 17:34:01,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 94 transitions, 454 flow [2022-11-25 17:34:01,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 641 transitions. [2022-11-25 17:34:01,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48123123123123124 [2022-11-25 17:34:01,027 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 641 transitions. [2022-11-25 17:34:01,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 641 transitions. [2022-11-25 17:34:01,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:01,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 641 transitions. [2022-11-25 17:34:01,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 213.66666666666666) internal successors, (641), 3 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:01,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:01,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 444.0) internal successors, (1776), 4 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:01,034 INFO L175 Difference]: Start difference. First operand has 89 places, 74 transitions, 250 flow. Second operand 3 states and 641 transitions. [2022-11-25 17:34:01,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 94 transitions, 454 flow [2022-11-25 17:34:01,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 94 transitions, 406 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 17:34:01,040 INFO L231 Difference]: Finished difference. Result has 87 places, 74 transitions, 212 flow [2022-11-25 17:34:01,041 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=74} [2022-11-25 17:34:01,043 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 16 predicate places. [2022-11-25 17:34:01,044 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 74 transitions, 212 flow [2022-11-25 17:34:01,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:01,045 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:01,045 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:01,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 17:34:01,045 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 17:34:01,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:01,046 INFO L85 PathProgramCache]: Analyzing trace with hash 295590401, now seen corresponding path program 1 times [2022-11-25 17:34:01,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:01,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070341645] [2022-11-25 17:34:01,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:01,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:01,286 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:01,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070341645] [2022-11-25 17:34:01,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070341645] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:01,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835434127] [2022-11-25 17:34:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:01,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:01,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:01,289 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:01,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:34:01,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:01,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:34:01,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:01,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:34:01,488 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:01,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:01,538 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:01,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835434127] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:01,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:34:01,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2022-11-25 17:34:01,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743724405] [2022-11-25 17:34:01,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:01,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:34:01,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:01,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:34:01,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:34:01,916 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 444 [2022-11-25 17:34:01,918 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 74 transitions, 212 flow. Second operand has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:01,918 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:01,918 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 444 [2022-11-25 17:34:01,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:02,068 INFO L130 PetriNetUnfolder]: 42/139 cut-off events. [2022-11-25 17:34:02,069 INFO L131 PetriNetUnfolder]: For 96/96 co-relation queries the response was YES. [2022-11-25 17:34:02,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 343 conditions, 139 events. 42/139 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 492 event pairs, 10 based on Foata normal form. 20/144 useless extension candidates. Maximal degree in co-relation 290. Up to 78 conditions per place. [2022-11-25 17:34:02,070 INFO L137 encePairwiseOnDemand]: 440/444 looper letters, 53 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2022-11-25 17:34:02,070 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 63 transitions, 293 flow [2022-11-25 17:34:02,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:34:02,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:34:02,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 787 transitions. [2022-11-25 17:34:02,098 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44313063063063063 [2022-11-25 17:34:02,098 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 787 transitions. [2022-11-25 17:34:02,098 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 787 transitions. [2022-11-25 17:34:02,099 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:02,099 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 787 transitions. [2022-11-25 17:34:02,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.75) internal successors, (787), 4 states have internal predecessors, (787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:02,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:02,107 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 444.0) internal successors, (2220), 5 states have internal predecessors, (2220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:02,108 INFO L175 Difference]: Start difference. First operand has 87 places, 74 transitions, 212 flow. Second operand 4 states and 787 transitions. [2022-11-25 17:34:02,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 63 transitions, 293 flow [2022-11-25 17:34:02,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 63 transitions, 287 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:34:02,112 INFO L231 Difference]: Finished difference. Result has 58 places, 43 transitions, 141 flow [2022-11-25 17:34:02,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=444, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=141, PETRI_PLACES=58, PETRI_TRANSITIONS=43} [2022-11-25 17:34:02,115 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, -13 predicate places. [2022-11-25 17:34:02,115 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 43 transitions, 141 flow [2022-11-25 17:34:02,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 187.125) internal successors, (1497), 8 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:02,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:02,117 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1] [2022-11-25 17:34:02,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:02,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:34:02,323 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 36 more)] === [2022-11-25 17:34:02,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:02,323 INFO L85 PathProgramCache]: Analyzing trace with hash 573368461, now seen corresponding path program 1 times [2022-11-25 17:34:02,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:02,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32003546] [2022-11-25 17:34:02,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:02,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:02,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:34:02,369 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:34:02,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:34:02,419 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:34:02,419 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:34:02,424 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (38 of 39 remaining) [2022-11-25 17:34:02,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 39 remaining) [2022-11-25 17:34:02,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 39 remaining) [2022-11-25 17:34:02,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 39 remaining) [2022-11-25 17:34:02,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 39 remaining) [2022-11-25 17:34:02,429 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (33 of 39 remaining) [2022-11-25 17:34:02,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 39 remaining) [2022-11-25 17:34:02,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 39 remaining) [2022-11-25 17:34:02,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 39 remaining) [2022-11-25 17:34:02,430 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 39 remaining) [2022-11-25 17:34:02,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 39 remaining) [2022-11-25 17:34:02,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (27 of 39 remaining) [2022-11-25 17:34:02,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 39 remaining) [2022-11-25 17:34:02,431 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 39 remaining) [2022-11-25 17:34:02,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 39 remaining) [2022-11-25 17:34:02,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 39 remaining) [2022-11-25 17:34:02,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (22 of 39 remaining) [2022-11-25 17:34:02,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 39 remaining) [2022-11-25 17:34:02,432 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 39 remaining) [2022-11-25 17:34:02,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 39 remaining) [2022-11-25 17:34:02,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 39 remaining) [2022-11-25 17:34:02,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 39 remaining) [2022-11-25 17:34:02,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 39 remaining) [2022-11-25 17:34:02,433 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 39 remaining) [2022-11-25 17:34:02,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 39 remaining) [2022-11-25 17:34:02,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 39 remaining) [2022-11-25 17:34:02,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 39 remaining) [2022-11-25 17:34:02,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 39 remaining) [2022-11-25 17:34:02,434 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 39 remaining) [2022-11-25 17:34:02,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 39 remaining) [2022-11-25 17:34:02,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 39 remaining) [2022-11-25 17:34:02,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 39 remaining) [2022-11-25 17:34:02,435 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 39 remaining) [2022-11-25 17:34:02,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 39 remaining) [2022-11-25 17:34:02,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 39 remaining) [2022-11-25 17:34:02,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 39 remaining) [2022-11-25 17:34:02,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 39 remaining) [2022-11-25 17:34:02,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 39 remaining) [2022-11-25 17:34:02,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 39 remaining) [2022-11-25 17:34:02,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 17:34:02,438 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2022-11-25 17:34:02,440 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:34:02,441 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-25 17:34:02,513 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 17:34:02,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-11-25 17:34:02,608 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-11-25 17:34:02,608 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-25 17:34:02,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2362 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-11-25 17:34:02,613 INFO L82 GeneralOperation]: Start removeDead. Operand has 267 places, 307 transitions, 632 flow [2022-11-25 17:34:02,620 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 267 places, 307 transitions, 632 flow [2022-11-25 17:34:02,620 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:34:02,620 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 267 places, 307 transitions, 632 flow [2022-11-25 17:34:02,621 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 267 places, 307 transitions, 632 flow [2022-11-25 17:34:02,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 267 places, 307 transitions, 632 flow [2022-11-25 17:34:02,700 INFO L130 PetriNetUnfolder]: 75/515 cut-off events. [2022-11-25 17:34:02,700 INFO L131 PetriNetUnfolder]: For 6/8 co-relation queries the response was YES. [2022-11-25 17:34:02,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 515 events. 75/515 cut-off events. For 6/8 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 2362 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2022-11-25 17:34:02,729 INFO L119 LiptonReduction]: Number of co-enabled transitions 44960 [2022-11-25 17:34:11,045 INFO L134 LiptonReduction]: Checked pairs total: 97629 [2022-11-25 17:34:11,046 INFO L136 LiptonReduction]: Total number of compositions: 299 [2022-11-25 17:34:11,049 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:34:11,049 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;@3afea700, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:34:11,050 INFO L358 AbstractCegarLoop]: Starting to check reachability of 50 error locations. [2022-11-25 17:34:11,053 INFO L130 PetriNetUnfolder]: 1/5 cut-off events. [2022-11-25 17:34:11,053 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:34:11,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:11,054 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:34:11,054 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1579680, now seen corresponding path program 1 times [2022-11-25 17:34:11,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:11,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854037909] [2022-11-25 17:34:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:11,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:11,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:11,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854037909] [2022-11-25 17:34:11,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854037909] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:11,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:11,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:34:11,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118144175] [2022-11-25 17:34:11,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:11,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:11,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:11,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:11,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:34:11,112 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 257 out of 606 [2022-11-25 17:34:11,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 137 transitions, 292 flow. Second operand has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:11,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:11,115 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 257 of 606 [2022-11-25 17:34:11,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:17,584 INFO L130 PetriNetUnfolder]: 25705/43468 cut-off events. [2022-11-25 17:34:17,584 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-11-25 17:34:17,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81461 conditions, 43468 events. 25705/43468 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 1968. Compared 383538 event pairs, 24304 based on Foata normal form. 4057/34518 useless extension candidates. Maximal degree in co-relation 33059. Up to 37859 conditions per place. [2022-11-25 17:34:17,893 INFO L137 encePairwiseOnDemand]: 563/606 looper letters, 75 selfloop transitions, 2 changer transitions 0/98 dead transitions. [2022-11-25 17:34:17,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 98 transitions, 368 flow [2022-11-25 17:34:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:17,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 889 transitions. [2022-11-25 17:34:17,897 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.488998899889989 [2022-11-25 17:34:17,897 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 889 transitions. [2022-11-25 17:34:17,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 889 transitions. [2022-11-25 17:34:17,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:17,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 889 transitions. [2022-11-25 17:34:17,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.3333333333333) internal successors, (889), 3 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:17,905 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 606.0) internal successors, (2424), 4 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:17,906 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 606.0) internal successors, (2424), 4 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:17,906 INFO L175 Difference]: Start difference. First operand has 104 places, 137 transitions, 292 flow. Second operand 3 states and 889 transitions. [2022-11-25 17:34:17,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 98 transitions, 368 flow [2022-11-25 17:34:17,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 368 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 17:34:17,910 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 224 flow [2022-11-25 17:34:17,910 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2022-11-25 17:34:17,912 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -5 predicate places. [2022-11-25 17:34:17,912 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 224 flow [2022-11-25 17:34:17,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 258.0) internal successors, (774), 3 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:17,913 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:17,913 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-11-25 17:34:17,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 17:34:17,914 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:17,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:17,914 INFO L85 PathProgramCache]: Analyzing trace with hash 48912775, now seen corresponding path program 1 times [2022-11-25 17:34:17,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:17,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230218620] [2022-11-25 17:34:17,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:17,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:17,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:17,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230218620] [2022-11-25 17:34:17,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230218620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:17,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528315980] [2022-11-25 17:34:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:17,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:17,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:17,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:17,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:34:18,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:18,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:34:18,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:18,083 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 17:34:18,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:34:18,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528315980] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:18,102 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:34:18,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-11-25 17:34:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209948055] [2022-11-25 17:34:18,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:34:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:34:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:34:18,125 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 606 [2022-11-25 17:34:18,128 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 224 flow. Second operand has 6 states, 6 states have (on average 257.1666666666667) internal successors, (1543), 6 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:18,128 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:18,128 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 606 [2022-11-25 17:34:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:23,317 INFO L130 PetriNetUnfolder]: 25705/43471 cut-off events. [2022-11-25 17:34:23,317 INFO L131 PetriNetUnfolder]: For 149/149 co-relation queries the response was YES. [2022-11-25 17:34:23,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81477 conditions, 43471 events. 25705/43471 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 1964. Compared 383483 event pairs, 24304 based on Foata normal form. 0/30464 useless extension candidates. Maximal degree in co-relation 81464. Up to 37859 conditions per place. [2022-11-25 17:34:23,562 INFO L137 encePairwiseOnDemand]: 603/606 looper letters, 75 selfloop transitions, 5 changer transitions 0/101 dead transitions. [2022-11-25 17:34:23,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 101 transitions, 396 flow [2022-11-25 17:34:23,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:34:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:34:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1619 transitions. [2022-11-25 17:34:23,570 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4452695269526953 [2022-11-25 17:34:23,570 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1619 transitions. [2022-11-25 17:34:23,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1619 transitions. [2022-11-25 17:34:23,572 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:23,572 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1619 transitions. [2022-11-25 17:34:23,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 269.8333333333333) internal successors, (1619), 6 states have internal predecessors, (1619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:23,582 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 606.0) internal successors, (4242), 7 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:23,584 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 606.0) internal successors, (4242), 7 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:23,584 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 224 flow. Second operand 6 states and 1619 transitions. [2022-11-25 17:34:23,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 101 transitions, 396 flow [2022-11-25 17:34:23,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 101 transitions, 392 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 17:34:23,588 INFO L231 Difference]: Finished difference. Result has 106 places, 101 transitions, 256 flow [2022-11-25 17:34:23,589 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=256, PETRI_PLACES=106, PETRI_TRANSITIONS=101} [2022-11-25 17:34:23,591 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 2 predicate places. [2022-11-25 17:34:23,591 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 101 transitions, 256 flow [2022-11-25 17:34:23,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 257.1666666666667) internal successors, (1543), 6 states have internal predecessors, (1543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:23,592 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:23,593 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 17:34:23,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:23,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:23,800 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:23,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:23,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1109632033, now seen corresponding path program 2 times [2022-11-25 17:34:23,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:23,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113088224] [2022-11-25 17:34:23,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:23,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:23,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:23,888 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 17:34:23,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:23,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113088224] [2022-11-25 17:34:23,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113088224] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:23,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072559182] [2022-11-25 17:34:23,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:34:23,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:23,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:23,891 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:23,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:34:24,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 17:34:24,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:34:24,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 17:34:24,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:24,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:34:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:34:24,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:24,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072559182] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:24,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:34:24,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 8 [2022-11-25 17:34:24,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415845215] [2022-11-25 17:34:24,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:24,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:24,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:24,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:24,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:34:24,172 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 606 [2022-11-25 17:34:24,173 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 101 transitions, 256 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 17:34:24,173 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:24,173 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 606 [2022-11-25 17:34:24,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:28,323 INFO L130 PetriNetUnfolder]: 25885/43098 cut-off events. [2022-11-25 17:34:28,324 INFO L131 PetriNetUnfolder]: For 119/119 co-relation queries the response was YES. [2022-11-25 17:34:28,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81325 conditions, 43098 events. 25885/43098 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 1876. Compared 371331 event pairs, 17994 based on Foata normal form. 0/30046 useless extension candidates. Maximal degree in co-relation 81290. Up to 38043 conditions per place. [2022-11-25 17:34:28,599 INFO L137 encePairwiseOnDemand]: 602/606 looper letters, 101 selfloop transitions, 2 changer transitions 0/124 dead transitions. [2022-11-25 17:34:28,600 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 124 transitions, 508 flow [2022-11-25 17:34:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:28,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:28,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 869 transitions. [2022-11-25 17:34:28,604 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47799779977997797 [2022-11-25 17:34:28,604 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 869 transitions. [2022-11-25 17:34:28,605 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 869 transitions. [2022-11-25 17:34:28,605 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:28,606 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 869 transitions. [2022-11-25 17:34:28,608 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:28,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 606.0) internal successors, (2424), 4 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:28,614 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 606.0) internal successors, (2424), 4 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:28,614 INFO L175 Difference]: Start difference. First operand has 106 places, 101 transitions, 256 flow. Second operand 3 states and 869 transitions. [2022-11-25 17:34:28,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 124 transitions, 508 flow [2022-11-25 17:34:28,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 124 transitions, 494 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-25 17:34:28,619 INFO L231 Difference]: Finished difference. Result has 108 places, 102 transitions, 256 flow [2022-11-25 17:34:28,619 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=108, PETRI_TRANSITIONS=102} [2022-11-25 17:34:28,620 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 4 predicate places. [2022-11-25 17:34:28,621 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 102 transitions, 256 flow [2022-11-25 17:34:28,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has 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 17:34:28,622 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:28,622 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1] [2022-11-25 17:34:28,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:28,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:34:28,829 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:28,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1109632032, now seen corresponding path program 1 times [2022-11-25 17:34:28,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:28,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114980595] [2022-11-25 17:34:28,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:28,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 17:34:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114980595] [2022-11-25 17:34:28,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114980595] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:28,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:28,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:34:28,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949799173] [2022-11-25 17:34:28,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:34:28,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:34:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:34:28,991 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 606 [2022-11-25 17:34:28,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 102 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:28,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:28,993 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 606 [2022-11-25 17:34:28,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:32,803 INFO L130 PetriNetUnfolder]: 24011/39825 cut-off events. [2022-11-25 17:34:32,803 INFO L131 PetriNetUnfolder]: For 1021/1021 co-relation queries the response was YES. [2022-11-25 17:34:32,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76728 conditions, 39825 events. 24011/39825 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 1755. Compared 338958 event pairs, 20971 based on Foata normal form. 0/28598 useless extension candidates. Maximal degree in co-relation 76698. Up to 32792 conditions per place. [2022-11-25 17:34:33,024 INFO L137 encePairwiseOnDemand]: 601/606 looper letters, 115 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2022-11-25 17:34:33,024 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 139 transitions, 566 flow [2022-11-25 17:34:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:34:33,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 17:34:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 874 transitions. [2022-11-25 17:34:33,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4807480748074808 [2022-11-25 17:34:33,028 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 874 transitions. [2022-11-25 17:34:33,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 874 transitions. [2022-11-25 17:34:33,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:33,029 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 874 transitions. [2022-11-25 17:34:33,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 291.3333333333333) internal successors, (874), 3 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:33,033 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 606.0) internal successors, (2424), 4 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:33,034 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 606.0) internal successors, (2424), 4 states have internal predecessors, (2424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:33,035 INFO L175 Difference]: Start difference. First operand has 108 places, 102 transitions, 256 flow. Second operand 3 states and 874 transitions. [2022-11-25 17:34:33,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 139 transitions, 566 flow [2022-11-25 17:34:33,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 139 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:34:33,042 INFO L231 Difference]: Finished difference. Result has 107 places, 100 transitions, 256 flow [2022-11-25 17:34:33,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=107, PETRI_TRANSITIONS=100} [2022-11-25 17:34:33,043 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 3 predicate places. [2022-11-25 17:34:33,043 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 100 transitions, 256 flow [2022-11-25 17:34:33,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 254.33333333333334) internal successors, (763), 3 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:33,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:33,044 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:33,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-25 17:34:33,044 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:33,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:33,045 INFO L85 PathProgramCache]: Analyzing trace with hash -2085473893, now seen corresponding path program 1 times [2022-11-25 17:34:33,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:33,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124618773] [2022-11-25 17:34:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:33,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:34:33,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:33,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124618773] [2022-11-25 17:34:33,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124618773] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:33,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309225944] [2022-11-25 17:34:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:33,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:33,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:33,116 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:33,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:34:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 17:34:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:33,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:34:33,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:34:33,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309225944] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:33,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:34:33,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-25 17:34:33,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219033963] [2022-11-25 17:34:33,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 17:34:33,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 17:34:33,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-25 17:34:33,360 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 606 [2022-11-25 17:34:33,371 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 100 transitions, 256 flow. Second operand has 13 states, 13 states have (on average 257.38461538461536) internal successors, (3346), 13 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:33,371 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:33,372 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 606 [2022-11-25 17:34:33,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:37,734 INFO L130 PetriNetUnfolder]: 24079/40053 cut-off events. [2022-11-25 17:34:37,734 INFO L131 PetriNetUnfolder]: For 1346/1346 co-relation queries the response was YES. [2022-11-25 17:34:37,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77914 conditions, 40053 events. 24079/40053 cut-off events. For 1346/1346 co-relation queries the response was YES. Maximal size of possible extension queue 1757. Compared 341288 event pairs, 22647 based on Foata normal form. 6/29279 useless extension candidates. Maximal degree in co-relation 77860. Up to 35439 conditions per place. [2022-11-25 17:34:38,303 INFO L137 encePairwiseOnDemand]: 603/606 looper letters, 74 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2022-11-25 17:34:38,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 106 transitions, 462 flow [2022-11-25 17:34:38,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:34:38,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 17:34:38,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 3162 transitions. [2022-11-25 17:34:38,316 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43481848184818483 [2022-11-25 17:34:38,316 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 3162 transitions. [2022-11-25 17:34:38,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 3162 transitions. [2022-11-25 17:34:38,319 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:38,319 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 3162 transitions. [2022-11-25 17:34:38,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 263.5) internal successors, (3162), 12 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 606.0) internal successors, (7878), 13 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,343 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 606.0) internal successors, (7878), 13 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,343 INFO L175 Difference]: Start difference. First operand has 107 places, 100 transitions, 256 flow. Second operand 12 states and 3162 transitions. [2022-11-25 17:34:38,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 106 transitions, 462 flow [2022-11-25 17:34:38,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 106 transitions, 456 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 17:34:38,436 INFO L231 Difference]: Finished difference. Result has 122 places, 106 transitions, 334 flow [2022-11-25 17:34:38,437 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=334, PETRI_PLACES=122, PETRI_TRANSITIONS=106} [2022-11-25 17:34:38,437 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 18 predicate places. [2022-11-25 17:34:38,437 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 106 transitions, 334 flow [2022-11-25 17:34:38,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 257.38461538461536) internal successors, (3346), 13 states have internal predecessors, (3346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:38,438 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:38,438 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:38,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:38,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:34:38,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:38,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash -268503077, now seen corresponding path program 2 times [2022-11-25 17:34:38,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:38,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126421774] [2022-11-25 17:34:38,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:38,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:38,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:38,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126421774] [2022-11-25 17:34:38,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126421774] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:38,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099458085] [2022-11-25 17:34:38,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:34:38,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:38,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:38,819 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:38,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:34:38,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:34:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:34:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 17:34:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:38,977 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-11-25 17:34:39,033 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:39,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:39,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099458085] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:39,034 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:34:39,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-11-25 17:34:39,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016663904] [2022-11-25 17:34:39,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:39,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:34:39,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:39,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:34:39,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:34:39,242 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 255 out of 606 [2022-11-25 17:34:39,243 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 106 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 256.75) internal successors, (1027), 4 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:39,243 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:39,243 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 255 of 606 [2022-11-25 17:34:39,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:43,787 INFO L130 PetriNetUnfolder]: 22782/37984 cut-off events. [2022-11-25 17:34:43,787 INFO L131 PetriNetUnfolder]: For 978/978 co-relation queries the response was YES. [2022-11-25 17:34:44,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73173 conditions, 37984 events. 22782/37984 cut-off events. For 978/978 co-relation queries the response was YES. Maximal size of possible extension queue 1673. Compared 325975 event pairs, 9652 based on Foata normal form. 0/27447 useless extension candidates. Maximal degree in co-relation 73095. Up to 31455 conditions per place. [2022-11-25 17:34:44,221 INFO L137 encePairwiseOnDemand]: 601/606 looper letters, 140 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2022-11-25 17:34:44,221 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 165 transitions, 738 flow [2022-11-25 17:34:44,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:34:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:34:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1155 transitions. [2022-11-25 17:34:44,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47648514851485146 [2022-11-25 17:34:44,226 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1155 transitions. [2022-11-25 17:34:44,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1155 transitions. [2022-11-25 17:34:44,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:44,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1155 transitions. [2022-11-25 17:34:44,230 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 288.75) internal successors, (1155), 4 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:44,234 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 606.0) internal successors, (3030), 5 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:44,235 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 606.0) internal successors, (3030), 5 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:44,236 INFO L175 Difference]: Start difference. First operand has 122 places, 106 transitions, 334 flow. Second operand 4 states and 1155 transitions. [2022-11-25 17:34:44,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 165 transitions, 738 flow [2022-11-25 17:34:44,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 690 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-25 17:34:44,242 INFO L231 Difference]: Finished difference. Result has 119 places, 105 transitions, 290 flow [2022-11-25 17:34:44,242 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=290, PETRI_PLACES=119, PETRI_TRANSITIONS=105} [2022-11-25 17:34:44,243 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 15 predicate places. [2022-11-25 17:34:44,243 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 105 transitions, 290 flow [2022-11-25 17:34:44,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 256.75) internal successors, (1027), 4 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:44,244 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:44,244 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:44,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:44,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:44,451 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:44,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:44,451 INFO L85 PathProgramCache]: Analyzing trace with hash -267946152, now seen corresponding path program 1 times [2022-11-25 17:34:44,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:44,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043451741] [2022-11-25 17:34:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:44,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:44,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:44,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043451741] [2022-11-25 17:34:44,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043451741] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:44,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:44,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:34:44,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840739585] [2022-11-25 17:34:44,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:44,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:34:44,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:44,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:34:44,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:34:45,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 218 out of 606 [2022-11-25 17:34:45,627 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 105 transitions, 290 flow. Second operand has 6 states, 6 states have (on average 219.33333333333334) internal successors, (1316), 6 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:45,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:45,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 218 of 606 [2022-11-25 17:34:45,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:48,241 INFO L130 PetriNetUnfolder]: 14350/23528 cut-off events. [2022-11-25 17:34:48,241 INFO L131 PetriNetUnfolder]: For 1138/1138 co-relation queries the response was YES. [2022-11-25 17:34:48,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46540 conditions, 23528 events. 14350/23528 cut-off events. For 1138/1138 co-relation queries the response was YES. Maximal size of possible extension queue 851. Compared 186442 event pairs, 399 based on Foata normal form. 1010/20044 useless extension candidates. Maximal degree in co-relation 46486. Up to 18813 conditions per place. [2022-11-25 17:34:48,375 INFO L137 encePairwiseOnDemand]: 585/606 looper letters, 165 selfloop transitions, 8 changer transitions 0/187 dead transitions. [2022-11-25 17:34:48,375 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 187 transitions, 820 flow [2022-11-25 17:34:48,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:34:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 17:34:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1511 transitions. [2022-11-25 17:34:48,381 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41556655665566555 [2022-11-25 17:34:48,381 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1511 transitions. [2022-11-25 17:34:48,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1511 transitions. [2022-11-25 17:34:48,383 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:48,383 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1511 transitions. [2022-11-25 17:34:48,387 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 251.83333333333334) internal successors, (1511), 6 states have internal predecessors, (1511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:48,394 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 606.0) internal successors, (4242), 7 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:48,395 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 606.0) internal successors, (4242), 7 states have internal predecessors, (4242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:48,395 INFO L175 Difference]: Start difference. First operand has 119 places, 105 transitions, 290 flow. Second operand 6 states and 1511 transitions. [2022-11-25 17:34:48,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 187 transitions, 820 flow [2022-11-25 17:34:48,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 187 transitions, 806 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-25 17:34:48,409 INFO L231 Difference]: Finished difference. Result has 105 places, 92 transitions, 272 flow [2022-11-25 17:34:48,409 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=105, PETRI_TRANSITIONS=92} [2022-11-25 17:34:48,410 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 1 predicate places. [2022-11-25 17:34:48,410 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 92 transitions, 272 flow [2022-11-25 17:34:48,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 219.33333333333334) internal successors, (1316), 6 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:48,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:48,411 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:48,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 17:34:48,411 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t_funErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash 283596274, now seen corresponding path program 1 times [2022-11-25 17:34:48,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:48,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723836420] [2022-11-25 17:34:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:48,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:48,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723836420] [2022-11-25 17:34:48,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723836420] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:48,698 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:34:48,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:34:48,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436452908] [2022-11-25 17:34:48,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:48,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 17:34:48,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:48,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 17:34:48,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-11-25 17:34:48,941 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 230 out of 606 [2022-11-25 17:34:48,942 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 92 transitions, 272 flow. Second operand has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:48,943 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:48,943 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 230 of 606 [2022-11-25 17:34:48,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:51,621 INFO L130 PetriNetUnfolder]: 15304/24547 cut-off events. [2022-11-25 17:34:51,621 INFO L131 PetriNetUnfolder]: For 1570/1570 co-relation queries the response was YES. [2022-11-25 17:34:51,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50153 conditions, 24547 events. 15304/24547 cut-off events. For 1570/1570 co-relation queries the response was YES. Maximal size of possible extension queue 936. Compared 183421 event pairs, 5551 based on Foata normal form. 0/19963 useless extension candidates. Maximal degree in co-relation 50098. Up to 18454 conditions per place. [2022-11-25 17:34:51,734 INFO L137 encePairwiseOnDemand]: 596/606 looper letters, 131 selfloop transitions, 11 changer transitions 0/156 dead transitions. [2022-11-25 17:34:51,734 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 156 transitions, 713 flow [2022-11-25 17:34:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:34:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:34:51,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1050 transitions. [2022-11-25 17:34:51,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43316831683168316 [2022-11-25 17:34:51,737 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1050 transitions. [2022-11-25 17:34:51,737 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1050 transitions. [2022-11-25 17:34:51,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:51,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1050 transitions. [2022-11-25 17:34:51,740 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 262.5) internal successors, (1050), 4 states have internal predecessors, (1050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:51,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 606.0) internal successors, (3030), 5 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:51,745 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 606.0) internal successors, (3030), 5 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:51,745 INFO L175 Difference]: Start difference. First operand has 105 places, 92 transitions, 272 flow. Second operand 4 states and 1050 transitions. [2022-11-25 17:34:51,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 156 transitions, 713 flow [2022-11-25 17:34:51,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 156 transitions, 712 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 17:34:51,753 INFO L231 Difference]: Finished difference. Result has 109 places, 101 transitions, 359 flow [2022-11-25 17:34:51,753 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=359, PETRI_PLACES=109, PETRI_TRANSITIONS=101} [2022-11-25 17:34:51,754 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, 5 predicate places. [2022-11-25 17:34:51,754 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 101 transitions, 359 flow [2022-11-25 17:34:51,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 231.33333333333334) internal successors, (1388), 6 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:51,755 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:51,755 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:51,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 17:34:51,755 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:51,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:51,756 INFO L85 PathProgramCache]: Analyzing trace with hash -333361989, now seen corresponding path program 1 times [2022-11-25 17:34:51,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:51,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345570033] [2022-11-25 17:34:51,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:51,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:51,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:51,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345570033] [2022-11-25 17:34:51,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345570033] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:51,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101767652] [2022-11-25 17:34:51,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:51,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:51,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:51,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:51,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:34:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:51,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:34:51,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:51,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:34:51,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-11-25 17:34:51,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101767652] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:34:51,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 17:34:51,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 17:34:51,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106884141] [2022-11-25 17:34:51,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 17:34:51,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:34:51,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:34:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:34:52,024 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 256 out of 606 [2022-11-25 17:34:52,026 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 101 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 258.57142857142856) internal successors, (1810), 7 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,026 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:52,026 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 256 of 606 [2022-11-25 17:34:52,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:52,397 INFO L130 PetriNetUnfolder]: 1478/2793 cut-off events. [2022-11-25 17:34:52,398 INFO L131 PetriNetUnfolder]: For 1032/1032 co-relation queries the response was YES. [2022-11-25 17:34:52,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6560 conditions, 2793 events. 1478/2793 cut-off events. For 1032/1032 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 18083 event pairs, 159 based on Foata normal form. 315/2864 useless extension candidates. Maximal degree in co-relation 6502. Up to 1754 conditions per place. [2022-11-25 17:34:52,409 INFO L137 encePairwiseOnDemand]: 603/606 looper letters, 100 selfloop transitions, 3 changer transitions 0/112 dead transitions. [2022-11-25 17:34:52,410 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 112 transitions, 549 flow [2022-11-25 17:34:52,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 17:34:52,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 17:34:52,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1371 transitions. [2022-11-25 17:34:52,415 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4524752475247525 [2022-11-25 17:34:52,415 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1371 transitions. [2022-11-25 17:34:52,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1371 transitions. [2022-11-25 17:34:52,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:52,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1371 transitions. [2022-11-25 17:34:52,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 274.2) internal successors, (1371), 5 states have internal predecessors, (1371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,421 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 606.0) internal successors, (3636), 6 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,423 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 606.0) internal successors, (3636), 6 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,423 INFO L175 Difference]: Start difference. First operand has 109 places, 101 transitions, 359 flow. Second operand 5 states and 1371 transitions. [2022-11-25 17:34:52,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 112 transitions, 549 flow [2022-11-25 17:34:52,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 112 transitions, 529 flow, removed 5 selfloop flow, removed 4 redundant places. [2022-11-25 17:34:52,430 INFO L231 Difference]: Finished difference. Result has 82 places, 62 transitions, 210 flow [2022-11-25 17:34:52,431 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=82, PETRI_TRANSITIONS=62} [2022-11-25 17:34:52,431 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -22 predicate places. [2022-11-25 17:34:52,431 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 62 transitions, 210 flow [2022-11-25 17:34:52,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 258.57142857142856) internal successors, (1810), 7 states have internal predecessors, (1810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:52,432 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:52,432 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:52,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:52,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 17:34:52,638 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:52,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:52,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1743919404, now seen corresponding path program 1 times [2022-11-25 17:34:52,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:52,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244239328] [2022-11-25 17:34:52,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:52,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:52,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 17:34:53,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:34:53,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244239328] [2022-11-25 17:34:53,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244239328] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 17:34:53,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247679339] [2022-11-25 17:34:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:53,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:34:53,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:34:53,060 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:34:53,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:34:53,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:34:53,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 17:34:53,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:34:53,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 17:34:53,351 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2022-11-25 17:34:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-11-25 17:34:53,457 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:34:53,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247679339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:34:53,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:34:53,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2022-11-25 17:34:53,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091570658] [2022-11-25 17:34:53,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:34:53,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:34:53,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:34:53,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:34:53,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-11-25 17:34:53,792 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 223 out of 606 [2022-11-25 17:34:53,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 62 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:53,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:34:53,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 223 of 606 [2022-11-25 17:34:53,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 17:34:54,150 INFO L130 PetriNetUnfolder]: 1265/2230 cut-off events. [2022-11-25 17:34:54,150 INFO L131 PetriNetUnfolder]: For 998/998 co-relation queries the response was YES. [2022-11-25 17:34:54,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5187 conditions, 2230 events. 1265/2230 cut-off events. For 998/998 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 12954 event pairs, 88 based on Foata normal form. 0/2130 useless extension candidates. Maximal degree in co-relation 5131. Up to 1893 conditions per place. [2022-11-25 17:34:54,159 INFO L137 encePairwiseOnDemand]: 601/606 looper letters, 63 selfloop transitions, 2 changer transitions 0/74 dead transitions. [2022-11-25 17:34:54,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 74 transitions, 372 flow [2022-11-25 17:34:54,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:34:54,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 17:34:54,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 947 transitions. [2022-11-25 17:34:54,164 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.39067656765676567 [2022-11-25 17:34:54,164 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 947 transitions. [2022-11-25 17:34:54,165 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 947 transitions. [2022-11-25 17:34:54,165 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 17:34:54,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 947 transitions. [2022-11-25 17:34:54,168 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 236.75) internal successors, (947), 4 states have internal predecessors, (947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:54,171 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 606.0) internal successors, (3030), 5 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:54,172 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 606.0) internal successors, (3030), 5 states have internal predecessors, (3030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:54,172 INFO L175 Difference]: Start difference. First operand has 82 places, 62 transitions, 210 flow. Second operand 4 states and 947 transitions. [2022-11-25 17:34:54,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 74 transitions, 372 flow [2022-11-25 17:34:54,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 363 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-11-25 17:34:54,176 INFO L231 Difference]: Finished difference. Result has 79 places, 59 transitions, 201 flow [2022-11-25 17:34:54,177 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=606, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=201, PETRI_PLACES=79, PETRI_TRANSITIONS=59} [2022-11-25 17:34:54,177 INFO L288 CegarLoopForPetriNet]: 104 programPoint places, -25 predicate places. [2022-11-25 17:34:54,178 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 59 transitions, 201 flow [2022-11-25 17:34:54,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 225.0) internal successors, (1125), 5 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:34:54,178 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:34:54,178 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 3, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 17:34:54,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:34:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b88383ea-8fd3-4e70-af48-1372d3840711/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 17:34:54,386 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 47 more)] === [2022-11-25 17:34:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:34:54,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1790439815, now seen corresponding path program 1 times [2022-11-25 17:34:54,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:34:54,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034494619] [2022-11-25 17:34:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:34:54,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:34:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:34:54,418 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 17:34:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 17:34:54,447 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 17:34:54,448 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 17:34:54,448 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (49 of 50 remaining) [2022-11-25 17:34:54,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (48 of 50 remaining) [2022-11-25 17:34:54,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (47 of 50 remaining) [2022-11-25 17:34:54,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (46 of 50 remaining) [2022-11-25 17:34:54,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (45 of 50 remaining) [2022-11-25 17:34:54,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (44 of 50 remaining) [2022-11-25 17:34:54,449 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (43 of 50 remaining) [2022-11-25 17:34:54,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (42 of 50 remaining) [2022-11-25 17:34:54,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (41 of 50 remaining) [2022-11-25 17:34:54,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (40 of 50 remaining) [2022-11-25 17:34:54,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (39 of 50 remaining) [2022-11-25 17:34:54,450 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (38 of 50 remaining) [2022-11-25 17:34:54,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (37 of 50 remaining) [2022-11-25 17:34:54,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (36 of 50 remaining) [2022-11-25 17:34:54,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (35 of 50 remaining) [2022-11-25 17:34:54,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (34 of 50 remaining) [2022-11-25 17:34:54,451 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (33 of 50 remaining) [2022-11-25 17:34:54,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (32 of 50 remaining) [2022-11-25 17:34:54,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (31 of 50 remaining) [2022-11-25 17:34:54,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (30 of 50 remaining) [2022-11-25 17:34:54,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (29 of 50 remaining) [2022-11-25 17:34:54,452 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (28 of 50 remaining) [2022-11-25 17:34:54,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (27 of 50 remaining) [2022-11-25 17:34:54,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (26 of 50 remaining) [2022-11-25 17:34:54,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (25 of 50 remaining) [2022-11-25 17:34:54,453 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (24 of 50 remaining) [2022-11-25 17:34:54,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (23 of 50 remaining) [2022-11-25 17:34:54,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (22 of 50 remaining) [2022-11-25 17:34:54,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 50 remaining) [2022-11-25 17:34:54,454 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 50 remaining) [2022-11-25 17:34:54,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 50 remaining) [2022-11-25 17:34:54,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 50 remaining) [2022-11-25 17:34:54,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 50 remaining) [2022-11-25 17:34:54,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 50 remaining) [2022-11-25 17:34:54,455 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 50 remaining) [2022-11-25 17:34:54,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 50 remaining) [2022-11-25 17:34:54,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 50 remaining) [2022-11-25 17:34:54,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 50 remaining) [2022-11-25 17:34:54,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (11 of 50 remaining) [2022-11-25 17:34:54,456 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 50 remaining) [2022-11-25 17:34:54,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 50 remaining) [2022-11-25 17:34:54,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 50 remaining) [2022-11-25 17:34:54,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 50 remaining) [2022-11-25 17:34:54,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 50 remaining) [2022-11-25 17:34:54,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 50 remaining) [2022-11-25 17:34:54,457 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 50 remaining) [2022-11-25 17:34:54,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 50 remaining) [2022-11-25 17:34:54,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 50 remaining) [2022-11-25 17:34:54,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 50 remaining) [2022-11-25 17:34:54,458 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr10ASSERT_VIOLATIONMEMORY_LEAK (0 of 50 remaining) [2022-11-25 17:34:54,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 17:34:54,459 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:34:54,460 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-25 17:34:54,460 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-25 17:34:54,516 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-25 17:34:54,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-11-25 17:34:54,808 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-11-25 17:34:54,809 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-25 17:34:54,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3783 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-11-25 17:34:54,816 INFO L82 GeneralOperation]: Start removeDead. Operand has 337 places, 389 transitions, 808 flow [2022-11-25 17:34:54,830 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 337 places, 389 transitions, 808 flow [2022-11-25 17:34:54,830 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 17:34:54,830 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 337 places, 389 transitions, 808 flow [2022-11-25 17:34:54,830 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 337 places, 389 transitions, 808 flow [2022-11-25 17:34:54,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 337 places, 389 transitions, 808 flow [2022-11-25 17:34:55,027 INFO L130 PetriNetUnfolder]: 110/759 cut-off events. [2022-11-25 17:34:55,028 INFO L131 PetriNetUnfolder]: For 19/22 co-relation queries the response was YES. [2022-11-25 17:34:55,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 787 conditions, 759 events. 110/759 cut-off events. For 19/22 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3783 event pairs, 1 based on Foata normal form. 0/536 useless extension candidates. Maximal degree in co-relation 523. Up to 16 conditions per place. [2022-11-25 17:34:55,089 INFO L119 LiptonReduction]: Number of co-enabled transitions 87360 [2022-11-25 17:35:04,621 INFO L134 LiptonReduction]: Checked pairs total: 178482 [2022-11-25 17:35:04,621 INFO L136 LiptonReduction]: Total number of compositions: 376 [2022-11-25 17:35:04,623 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:35:04,624 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;@3afea700, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:35:04,624 INFO L358 AbstractCegarLoop]: Starting to check reachability of 61 error locations. [2022-11-25 17:35:04,625 INFO L130 PetriNetUnfolder]: 1/4 cut-off events. [2022-11-25 17:35:04,626 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 17:35:04,626 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 17:35:04,626 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 17:35:04,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 58 more)] === [2022-11-25 17:35:04,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:35:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash 2420070, now seen corresponding path program 1 times [2022-11-25 17:35:04,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:35:04,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619917465] [2022-11-25 17:35:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:35:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:35:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:35:04,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:35:04,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:35:04,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619917465] [2022-11-25 17:35:04,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619917465] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:35:04,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:35:04,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:35:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210291826] [2022-11-25 17:35:04,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:35:04,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:35:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:35:04,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:35:04,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:35:04,667 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 324 out of 765 [2022-11-25 17:35:04,668 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 384 flow. Second operand has 3 states, 3 states have (on average 325.0) internal successors, (975), 3 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:35:04,668 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 17:35:04,669 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 324 of 765 [2022-11-25 17:35:04,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand