./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.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_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/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_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/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_6ee26299-8f6e-4433-a87b-6b500912c960/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 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:02:46,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:02:46,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:02:46,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:02:46,289 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:02:46,293 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:02:46,297 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:02:46,302 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:02:46,304 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:02:46,310 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:02:46,312 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:02:46,314 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:02:46,315 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:02:46,318 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:02:46,322 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:02:46,324 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:02:46,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:02:46,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:02:46,330 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:02:46,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:02:46,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:02:46,341 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:02:46,344 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:02:46,345 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:02:46,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:02:46,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:02:46,359 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:02:46,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:02:46,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:02:46,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:02:46,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:02:46,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:02:46,370 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:02:46,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:02:46,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:02:46,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:02:46,374 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:02:46,374 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:02:46,375 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:02:46,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:02:46,377 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:02:46,378 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:02:46,417 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:02:46,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:02:46,418 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:02:46,418 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:02:46,419 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:02:46,419 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:02:46,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:02:46,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:02:46,442 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:02:46,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:02:46,442 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:02:46,442 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:02:46,443 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:02:46,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:02:46,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:02:46,443 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:02:46,444 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:02:46,444 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:02:46,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:02:46,444 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:02:46,445 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:02:46,445 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:02:46,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:02:46,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:02:46,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:02:46,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:46,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:02:46,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:02:46,447 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:02:46,447 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:02:46,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:02:46,447 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:02:46,447 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:02:46,448 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_6ee26299-8f6e-4433-a87b-6b500912c960/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 034172cc4904075fab6f792587170b7236be9fb41f3a62fa7fbe9a216ec4ca2c [2022-11-25 18:02:46,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:02:46,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:02:46,762 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:02:46,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:02:46,764 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:02:46,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2022-11-25 18:02:50,422 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:02:50,843 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:02:50,844 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/sv-benchmarks/c/goblint-regression/09-regions_12-arraycollapse_rc.i [2022-11-25 18:02:50,882 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/data/87a6d6d2e/2619abf682e941bb9eecfda9b1c10dae/FLAG11ce9f10b [2022-11-25 18:02:51,039 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/data/87a6d6d2e/2619abf682e941bb9eecfda9b1c10dae [2022-11-25 18:02:51,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:02:51,044 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:02:51,046 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:51,046 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:02:51,051 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:02:51,051 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:51" (1/1) ... [2022-11-25 18:02:51,053 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@450c6c1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:51, skipping insertion in model container [2022-11-25 18:02:51,053 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:02:51" (1/1) ... [2022-11-25 18:02:51,062 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:02:51,129 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:02:51,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:51,905 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:02:51,973 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:02:52,083 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:02:52,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52 WrapperNode [2022-11-25 18:02:52,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:02:52,089 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:52,089 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:02:52,089 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:02:52,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,135 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,171 INFO L138 Inliner]: procedures = 370, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 154 [2022-11-25 18:02:52,171 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:02:52,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:02:52,173 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:02:52,173 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:02:52,184 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,213 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,215 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:02:52,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:02:52,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:02:52,221 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:02:52,222 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (1/1) ... [2022-11-25 18:02:52,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:02:52,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:02:52,267 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:02:52,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:02:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:02:52,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 18:02:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:02:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:02:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:02:52,327 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:02:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:02:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:02:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 18:02:52,328 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-25 18:02:52,329 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-25 18:02:52,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:02:52,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:02:52,332 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-25 18:02:52,602 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:02:52,605 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:02:53,473 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:02:53,488 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:02:53,492 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 18:02:53,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:53 BoogieIcfgContainer [2022-11-25 18:02:53,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:02:53,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:02:53,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:02:53,505 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:02:53,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:02:51" (1/3) ... [2022-11-25 18:02:53,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ded674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:53, skipping insertion in model container [2022-11-25 18:02:53,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:02:52" (2/3) ... [2022-11-25 18:02:53,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63ded674 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:02:53, skipping insertion in model container [2022-11-25 18:02:53,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:02:53" (3/3) ... [2022-11-25 18:02:53,512 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_12-arraycollapse_rc.i [2022-11-25 18:02:53,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:02:53,538 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 59 error locations. [2022-11-25 18:02:53,538 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:02:53,734 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-25 18:02:53,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 259 transitions, 523 flow [2022-11-25 18:02:53,992 INFO L130 PetriNetUnfolder]: 5/258 cut-off events. [2022-11-25 18:02:53,993 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:54,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 258 events. 5/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 401 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-11-25 18:02:54,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 258 places, 259 transitions, 523 flow [2022-11-25 18:02:54,020 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 257 places, 258 transitions, 519 flow [2022-11-25 18:02:54,024 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:02:54,045 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 257 places, 258 transitions, 519 flow [2022-11-25 18:02:54,067 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 257 places, 258 transitions, 519 flow [2022-11-25 18:02:54,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 257 places, 258 transitions, 519 flow [2022-11-25 18:02:54,167 INFO L130 PetriNetUnfolder]: 5/258 cut-off events. [2022-11-25 18:02:54,167 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:02:54,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 262 conditions, 258 events. 5/258 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 402 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 173. Up to 2 conditions per place. [2022-11-25 18:02:54,174 INFO L119 LiptonReduction]: Number of co-enabled transitions 3136 [2022-11-25 18:03:52,036 WARN L233 SmtUtils]: Spent 12.74s on a formula simplification. DAG size of input: 217 DAG size of output: 203 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:03:58,160 WARN L233 SmtUtils]: Spent 6.11s on a formula simplification that was a NOOP. DAG size: 199 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:04:10,177 WARN L233 SmtUtils]: Spent 12.01s on a formula simplification. DAG size of input: 213 DAG size of output: 200 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:04:15,640 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification that was a NOOP. DAG size: 196 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:05:11,119 WARN L233 SmtUtils]: Spent 23.17s on a formula simplification. DAG size of input: 281 DAG size of output: 269 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:05:22,330 WARN L233 SmtUtils]: Spent 11.20s on a formula simplification that was a NOOP. DAG size: 241 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:05:53,396 WARN L233 SmtUtils]: Spent 31.06s on a formula simplification. DAG size of input: 290 DAG size of output: 281 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:06:07,490 WARN L233 SmtUtils]: Spent 14.09s on a formula simplification that was a NOOP. DAG size: 253 (called from [L 301] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-11-25 18:06:22,388 INFO L134 LiptonReduction]: Checked pairs total: 14274 [2022-11-25 18:06:22,388 INFO L136 LiptonReduction]: Total number of compositions: 378 [2022-11-25 18:06:22,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:06:22,411 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;@5f286f32, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:06:22,412 INFO L358 AbstractCegarLoop]: Starting to check reachability of 72 error locations. [2022-11-25 18:06:22,416 INFO L130 PetriNetUnfolder]: 1/2 cut-off events. [2022-11-25 18:06:22,417 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:06:22,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:22,418 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:06:22,418 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-25 18:06:22,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:22,424 INFO L85 PathProgramCache]: Analyzing trace with hash 29513, now seen corresponding path program 1 times [2022-11-25 18:06:22,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:06:22,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997854894] [2022-11-25 18:06:22,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:22,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:06:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:06:22,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:06:22,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997854894] [2022-11-25 18:06:22,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997854894] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:22,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:22,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:06:22,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663617496] [2022-11-25 18:06:22,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:22,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:06:22,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:06:22,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:06:22,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:06:22,703 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 254 out of 637 [2022-11-25 18:06:22,710 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 80 transitions, 163 flow. Second operand has 2 states, 2 states have (on average 255.0) internal successors, (510), 2 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:22,711 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:22,711 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 254 of 637 [2022-11-25 18:06:22,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:23,252 INFO L130 PetriNetUnfolder]: 239/539 cut-off events. [2022-11-25 18:06:23,252 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:06:23,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1064 conditions, 539 events. 239/539 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2739 event pairs, 238 based on Foata normal form. 0/301 useless extension candidates. Maximal degree in co-relation 1033. Up to 521 conditions per place. [2022-11-25 18:06:23,260 INFO L137 encePairwiseOnDemand]: 604/637 looper letters, 44 selfloop transitions, 0 changer transitions 0/47 dead transitions. [2022-11-25 18:06:23,260 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 185 flow [2022-11-25 18:06:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:06:23,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:06:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 585 transitions. [2022-11-25 18:06:23,288 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2022-11-25 18:06:23,289 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 585 transitions. [2022-11-25 18:06:23,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 585 transitions. [2022-11-25 18:06:23,294 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:23,297 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 585 transitions. [2022-11-25 18:06:23,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 292.5) internal successors, (585), 2 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:23,321 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 637.0) internal successors, (1911), 3 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:23,323 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 637.0) internal successors, (1911), 3 states have internal predecessors, (1911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:23,325 INFO L175 Difference]: Start difference. First operand has 83 places, 80 transitions, 163 flow. Second operand 2 states and 585 transitions. [2022-11-25 18:06:23,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 185 flow [2022-11-25 18:06:23,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 47 transitions, 184 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:06:23,332 INFO L231 Difference]: Finished difference. Result has 50 places, 47 transitions, 96 flow [2022-11-25 18:06:23,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=637, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=96, PETRI_PLACES=50, PETRI_TRANSITIONS=47} [2022-11-25 18:06:23,339 INFO L288 CegarLoopForPetriNet]: 83 programPoint places, -33 predicate places. [2022-11-25 18:06:23,339 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 47 transitions, 96 flow [2022-11-25 18:06:23,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 255.0) internal successors, (510), 2 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:23,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:23,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:06:23,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:06:23,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-25 18:06:23,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:23,358 INFO L85 PathProgramCache]: Analyzing trace with hash 29575, now seen corresponding path program 1 times [2022-11-25 18:06:23,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:06:23,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580505112] [2022-11-25 18:06:23,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:23,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:06:23,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:06:23,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:06:23,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580505112] [2022-11-25 18:06:23,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580505112] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:23,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:23,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:06:23,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609114146] [2022-11-25 18:06:23,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:23,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:06:23,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:06:23,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:06:23,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:06:23,605 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 250 out of 637 [2022-11-25 18:06:23,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 47 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:23,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:23,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 250 of 637 [2022-11-25 18:06:23,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:24,220 INFO L130 PetriNetUnfolder]: 239/542 cut-off events. [2022-11-25 18:06:24,221 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:06:24,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1070 conditions, 542 events. 239/542 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2737 event pairs, 238 based on Foata normal form. 0/302 useless extension candidates. Maximal degree in co-relation 1067. Up to 521 conditions per place. [2022-11-25 18:06:24,224 INFO L137 encePairwiseOnDemand]: 627/637 looper letters, 45 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2022-11-25 18:06:24,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 50 transitions, 196 flow [2022-11-25 18:06:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:06:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:06:24,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 805 transitions. [2022-11-25 18:06:24,228 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.42124542124542125 [2022-11-25 18:06:24,228 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 805 transitions. [2022-11-25 18:06:24,228 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 805 transitions. [2022-11-25 18:06:24,229 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:24,229 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 805 transitions. [2022-11-25 18:06:24,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 268.3333333333333) internal successors, (805), 3 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:24,235 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 637.0) internal successors, (2548), 4 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:24,237 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 637.0) internal successors, (2548), 4 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:24,237 INFO L175 Difference]: Start difference. First operand has 50 places, 47 transitions, 96 flow. Second operand 3 states and 805 transitions. [2022-11-25 18:06:24,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 50 transitions, 196 flow [2022-11-25 18:06:24,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 196 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:06:24,239 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 122 flow [2022-11-25 18:06:24,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=637, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2022-11-25 18:06:24,240 INFO L288 CegarLoopForPetriNet]: 83 programPoint places, -30 predicate places. [2022-11-25 18:06:24,241 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 122 flow [2022-11-25 18:06:24,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:24,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:24,242 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1] [2022-11-25 18:06:24,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:06:24,242 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-25 18:06:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 29518, now seen corresponding path program 1 times [2022-11-25 18:06:24,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:06:24,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374082587] [2022-11-25 18:06:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:24,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:06:24,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:24,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:06:24,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:06:24,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374082587] [2022-11-25 18:06:24,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374082587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:06:24,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:06:24,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:06:24,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445739892] [2022-11-25 18:06:24,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:06:24,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:06:24,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:06:24,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:06:24,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:06:24,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 242 out of 637 [2022-11-25 18:06:24,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:24,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:24,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 242 of 637 [2022-11-25 18:06:24,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:25,298 INFO L130 PetriNetUnfolder]: 239/540 cut-off events. [2022-11-25 18:06:25,298 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:06:25,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 540 events. 239/540 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2703 event pairs, 238 based on Foata normal form. 1/304 useless extension candidates. Maximal degree in co-relation 1075. Up to 521 conditions per place. [2022-11-25 18:06:25,302 INFO L137 encePairwiseOnDemand]: 633/637 looper letters, 43 selfloop transitions, 2 changer transitions 0/48 dead transitions. [2022-11-25 18:06:25,302 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 48 transitions, 212 flow [2022-11-25 18:06:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:06:25,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:06:25,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 773 transitions. [2022-11-25 18:06:25,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4045002616431188 [2022-11-25 18:06:25,305 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 773 transitions. [2022-11-25 18:06:25,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 773 transitions. [2022-11-25 18:06:25,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:06:25,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 773 transitions. [2022-11-25 18:06:25,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 257.6666666666667) internal successors, (773), 3 states have internal predecessors, (773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:25,312 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 637.0) internal successors, (2548), 4 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:25,314 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 637.0) internal successors, (2548), 4 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:25,314 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 122 flow. Second operand 3 states and 773 transitions. [2022-11-25 18:06:25,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 48 transitions, 212 flow [2022-11-25 18:06:25,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 48 transitions, 208 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-11-25 18:06:25,316 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 128 flow [2022-11-25 18:06:25,317 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=637, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2022-11-25 18:06:25,317 INFO L288 CegarLoopForPetriNet]: 83 programPoint places, -28 predicate places. [2022-11-25 18:06:25,318 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 128 flow [2022-11-25 18:06:25,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:25,318 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:06:25,319 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:06:25,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:06:25,319 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-25 18:06:25,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:06:25,320 INFO L85 PathProgramCache]: Analyzing trace with hash 917358, now seen corresponding path program 1 times [2022-11-25 18:06:25,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:06:25,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588368289] [2022-11-25 18:06:25,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:25,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:06:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:06:25,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:06:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588368289] [2022-11-25 18:06:25,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588368289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:06:25,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262613728] [2022-11-25 18:06:25,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:06:25,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:06:25,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:06:25,969 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:06:25,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:06:26,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:06:26,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-25 18:06:26,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:06:26,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:26,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:26,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:06:26,248 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-25 18:06:26,315 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:06:26,316 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-11-25 18:06:26,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:06:26,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:06:30,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:06:30,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262613728] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:06:30,849 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:06:30,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2022-11-25 18:06:30,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846699801] [2022-11-25 18:06:30,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:06:30,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:06:30,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:06:30,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:06:30,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:06:33,052 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 228 out of 637 [2022-11-25 18:06:33,055 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 128 flow. Second operand has 8 states, 8 states have (on average 229.125) internal successors, (1833), 8 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:06:33,055 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:06:33,055 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 228 of 637 [2022-11-25 18:06:33,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:06:41,935 WARN L233 SmtUtils]: Spent 8.59s on a formula simplification. DAG size of input: 63 DAG size of output: 59 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:06:44,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:06:47,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:06:49,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:06:51,208 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:06:52,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:06:54,409 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:06:56,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:06:58,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:07:00,457 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:07:03,623 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:07:06,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-25 18:07:07,545 INFO L130 PetriNetUnfolder]: 251/561 cut-off events. [2022-11-25 18:07:07,546 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:07:07,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1147 conditions, 561 events. 251/561 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2768 event pairs, 238 based on Foata normal form. 1/309 useless extension candidates. Maximal degree in co-relation 1141. Up to 527 conditions per place. [2022-11-25 18:07:07,550 INFO L137 encePairwiseOnDemand]: 625/637 looper letters, 49 selfloop transitions, 17 changer transitions 0/69 dead transitions. [2022-11-25 18:07:07,550 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 344 flow [2022-11-25 18:07:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:07:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:07:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1446 transitions. [2022-11-25 18:07:07,556 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.3783359497645212 [2022-11-25 18:07:07,556 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1446 transitions. [2022-11-25 18:07:07,556 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1446 transitions. [2022-11-25 18:07:07,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:07,557 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1446 transitions. [2022-11-25 18:07:07,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 241.0) internal successors, (1446), 6 states have internal predecessors, (1446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:07,568 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 637.0) internal successors, (4459), 7 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:07,571 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 637.0) internal successors, (4459), 7 states have internal predecessors, (4459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:07,571 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 128 flow. Second operand 6 states and 1446 transitions. [2022-11-25 18:07:07,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 344 flow [2022-11-25 18:07:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 69 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:07,574 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 280 flow [2022-11-25 18:07:07,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=637, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=280, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2022-11-25 18:07:07,575 INFO L288 CegarLoopForPetriNet]: 83 programPoint places, -22 predicate places. [2022-11-25 18:07:07,575 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 280 flow [2022-11-25 18:07:07,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 229.125) internal successors, (1833), 8 states have internal predecessors, (1833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:07,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:07,577 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-25 18:07:07,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:07:07,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-11-25 18:07:07,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-25 18:07:07,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:07,786 INFO L85 PathProgramCache]: Analyzing trace with hash 28440397, now seen corresponding path program 1 times [2022-11-25 18:07:07,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:07,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996873545] [2022-11-25 18:07:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:07,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:07,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:07:08,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:08,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996873545] [2022-11-25 18:07:08,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996873545] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:08,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:08,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:07:08,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787728321] [2022-11-25 18:07:08,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:08,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:08,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:08,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:08,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:08,364 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 637 [2022-11-25 18:07:08,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:08,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 637 [2022-11-25 18:07:08,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:08,983 INFO L130 PetriNetUnfolder]: 237/553 cut-off events. [2022-11-25 18:07:08,983 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:07:08,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1175 conditions, 553 events. 237/553 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2823 event pairs, 147 based on Foata normal form. 16/336 useless extension candidates. Maximal degree in co-relation 1166. Up to 405 conditions per place. [2022-11-25 18:07:08,987 INFO L137 encePairwiseOnDemand]: 628/637 looper letters, 69 selfloop transitions, 5 changer transitions 0/77 dead transitions. [2022-11-25 18:07:08,987 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 77 transitions, 432 flow [2022-11-25 18:07:08,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:08,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 784 transitions. [2022-11-25 18:07:08,990 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2022-11-25 18:07:08,990 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 784 transitions. [2022-11-25 18:07:08,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 784 transitions. [2022-11-25 18:07:08,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:08,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 784 transitions. [2022-11-25 18:07:08,993 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,997 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 637.0) internal successors, (2548), 4 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,999 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 637.0) internal successors, (2548), 4 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:08,999 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 280 flow. Second operand 3 states and 784 transitions. [2022-11-25 18:07:08,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 77 transitions, 432 flow [2022-11-25 18:07:09,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 77 transitions, 408 flow, removed 11 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:09,005 INFO L231 Difference]: Finished difference. Result has 61 places, 61 transitions, 256 flow [2022-11-25 18:07:09,005 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=637, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=256, PETRI_PLACES=61, PETRI_TRANSITIONS=61} [2022-11-25 18:07:09,008 INFO L288 CegarLoopForPetriNet]: 83 programPoint places, -22 predicate places. [2022-11-25 18:07:09,009 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 61 transitions, 256 flow [2022-11-25 18:07:09,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 241.33333333333334) internal successors, (724), 3 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:09,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:09,010 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1] [2022-11-25 18:07:09,010 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:07:09,011 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-25 18:07:09,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:09,011 INFO L85 PathProgramCache]: Analyzing trace with hash 28440467, now seen corresponding path program 1 times [2022-11-25 18:07:09,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:09,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459292026] [2022-11-25 18:07:09,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:09,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:09,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:09,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:09,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459292026] [2022-11-25 18:07:09,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459292026] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:07:09,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523212234] [2022-11-25 18:07:09,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:09,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:09,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:09,219 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:07:09,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:07:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:09,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:07:09,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:09,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:09,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:09,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523212234] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:07:09,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:07:09,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-25 18:07:09,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131410039] [2022-11-25 18:07:09,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:07:09,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:07:09,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:09,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:07:09,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:07:09,652 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 249 out of 637 [2022-11-25 18:07:09,655 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 61 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:09,655 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:09,655 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 249 of 637 [2022-11-25 18:07:09,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:11,175 INFO L130 PetriNetUnfolder]: 228/543 cut-off events. [2022-11-25 18:07:11,175 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-11-25 18:07:11,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1216 conditions, 543 events. 228/543 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2777 event pairs, 226 based on Foata normal form. 5/341 useless extension candidates. Maximal degree in co-relation 1205. Up to 514 conditions per place. [2022-11-25 18:07:11,179 INFO L137 encePairwiseOnDemand]: 627/637 looper letters, 44 selfloop transitions, 8 changer transitions 0/55 dead transitions. [2022-11-25 18:07:11,179 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 55 transitions, 332 flow [2022-11-25 18:07:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:07:11,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:07:11,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 2069 transitions. [2022-11-25 18:07:11,185 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40600470957613816 [2022-11-25 18:07:11,186 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 2069 transitions. [2022-11-25 18:07:11,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 2069 transitions. [2022-11-25 18:07:11,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:11,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 2069 transitions. [2022-11-25 18:07:11,192 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 258.625) internal successors, (2069), 8 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,200 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 637.0) internal successors, (5733), 9 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,203 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 637.0) internal successors, (5733), 9 states have internal predecessors, (5733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,203 INFO L175 Difference]: Start difference. First operand has 61 places, 61 transitions, 256 flow. Second operand 8 states and 2069 transitions. [2022-11-25 18:07:11,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 55 transitions, 332 flow [2022-11-25 18:07:11,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 318 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:11,207 INFO L231 Difference]: Finished difference. Result has 70 places, 54 transitions, 270 flow [2022-11-25 18:07:11,208 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=637, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=270, PETRI_PLACES=70, PETRI_TRANSITIONS=54} [2022-11-25 18:07:11,208 INFO L288 CegarLoopForPetriNet]: 83 programPoint places, -13 predicate places. [2022-11-25 18:07:11,209 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 54 transitions, 270 flow [2022-11-25 18:07:11,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 250.0) internal successors, (2000), 8 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,210 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:11,210 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 1, 1] [2022-11-25 18:07:11,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 18:07:11,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 18:07:11,417 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 69 more)] === [2022-11-25 18:07:11,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:11,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1561492302, now seen corresponding path program 2 times [2022-11-25 18:07:11,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:11,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702236998] [2022-11-25 18:07:11,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:11,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:14,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:14,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702236998] [2022-11-25 18:07:14,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702236998] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:07:14,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024365703] [2022-11-25 18:07:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:07:14,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:14,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:14,482 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:07:14,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6ee26299-8f6e-4433-a87b-6b500912c960/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:07:14,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:07:14,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:07:14,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 76 conjunts are in the unsatisfiable core [2022-11-25 18:07:14,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:14,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:14,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:14,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:14,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-25 18:07:15,014 INFO L321 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2022-11-25 18:07:15,014 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 9 case distinctions, treesize of input 43 treesize of output 49 [2022-11-25 18:07:15,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,122 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:07:15,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 23 [2022-11-25 18:07:15,175 INFO L321 Elim1Store]: treesize reduction 21, result has 48.8 percent of original size [2022-11-25 18:07:15,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 52 treesize of output 61 [2022-11-25 18:07:15,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,311 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:07:15,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2022-11-25 18:07:15,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,356 INFO L321 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2022-11-25 18:07:15,357 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2022-11-25 18:07:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:15,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-25 18:07:15,545 INFO L321 Elim1Store]: treesize reduction 98, result has 24.6 percent of original size [2022-11-25 18:07:15,546 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 48 treesize of output 65 [2022-11-25 18:07:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:15,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:19,107 INFO L321 Elim1Store]: treesize reduction 5, result has 97.8 percent of original size [2022-11-25 18:07:19,108 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 8773 treesize of output 8872