./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c --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_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/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_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/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_f7785241-9997-4f12-9c27-39766efc4d64/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 c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f --- 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 18:30:09,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:30:09,106 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:30:09,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:30:09,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:30:09,159 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:30:09,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:30:09,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:30:09,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:30:09,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:30:09,181 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:30:09,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:30:09,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:30:09,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:30:09,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:30:09,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:30:09,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:30:09,199 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:30:09,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:30:09,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:30:09,212 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:30:09,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:30:09,217 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:30:09,219 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:30:09,231 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:30:09,233 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:30:09,234 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:30:09,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:30:09,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:30:09,238 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:30:09,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:30:09,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:30:09,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:30:09,244 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:30:09,246 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:30:09,246 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:30:09,247 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:30:09,248 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:30:09,248 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:30:09,250 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:30:09,251 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:30:09,253 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:30:09,300 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:30:09,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:30:09,302 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:30:09,302 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:30:09,303 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:30:09,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:30:09,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:30:09,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:30:09,306 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:30:09,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:30:09,308 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:30:09,308 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:30:09,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:30:09,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:30:09,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:30:09,309 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:30:09,309 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:30:09,309 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:30:09,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:30:09,310 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:30:09,311 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:30:09,311 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:30:09,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:30:09,312 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:30:09,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:30:09,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:30:09,313 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:30:09,313 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:30:09,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:30:09,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:30:09,315 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:30:09,315 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:30:09,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:30:09,316 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_f7785241-9997-4f12-9c27-39766efc4d64/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c17307c3ae663be4a153b702602dea6d5ee45f14a080e7a1fb720e97140b770f [2022-11-25 18:30:09,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:30:09,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:30:09,761 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:30:09,763 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:30:09,764 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:30:09,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-25 18:30:13,362 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:30:13,646 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:30:13,647 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c [2022-11-25 18:30:13,657 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/data/28cd44a1f/21c5eeb3e9924ba1aebdb2d717a12255/FLAGdfa9828e4 [2022-11-25 18:30:13,958 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/data/28cd44a1f/21c5eeb3e9924ba1aebdb2d717a12255 [2022-11-25 18:30:13,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:30:13,963 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:30:13,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:13,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:30:13,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:30:13,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:13" (1/1) ... [2022-11-25 18:30:13,976 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19769cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:13, skipping insertion in model container [2022-11-25 18:30:13,977 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:30:13" (1/1) ... [2022-11-25 18:30:13,986 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:30:14,006 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:30:14,214 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:30:14,215 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:30:14,224 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:30:14,226 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:30:14,245 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-25 18:30:14,256 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:14,273 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:30:14,297 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:30:14,298 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:30:14,300 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-11-25 18:30:14,305 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-11-25 18:30:14,317 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/sv-benchmarks/c/weaver/popl20-nonblocking-cntr.wvr.c[2037,2050] [2022-11-25 18:30:14,325 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:30:14,347 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:30:14,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14 WrapperNode [2022-11-25 18:30:14,348 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:30:14,350 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:30:14,350 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:30:14,351 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:30:14,360 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,409 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-25 18:30:14,410 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:30:14,410 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:30:14,411 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:30:14,411 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:30:14,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,426 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,427 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,439 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,440 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,442 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:30:14,443 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:30:14,444 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:30:14,444 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:30:14,445 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (1/1) ... [2022-11-25 18:30:14,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:30:14,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:14,483 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:30:14,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:30:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:30:14,543 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-25 18:30:14,543 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-25 18:30:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-25 18:30:14,544 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-25 18:30:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:30:14,544 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:30:14,545 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:30:14,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-25 18:30:14,545 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-25 18:30:14,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:30:14,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:30:14,546 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:30:14,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:30:14,548 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 18:30:14,709 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:30:14,712 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:30:14,997 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:30:15,090 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:30:15,090 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:30:15,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:15 BoogieIcfgContainer [2022-11-25 18:30:15,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:30:15,096 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:30:15,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:30:15,113 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:30:15,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:30:13" (1/3) ... [2022-11-25 18:30:15,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afe4b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:15, skipping insertion in model container [2022-11-25 18:30:15,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:30:14" (2/3) ... [2022-11-25 18:30:15,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afe4b70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:30:15, skipping insertion in model container [2022-11-25 18:30:15,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:30:15" (3/3) ... [2022-11-25 18:30:15,120 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr.wvr.c [2022-11-25 18:30:15,146 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:30:15,147 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2022-11-25 18:30:15,147 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:30:15,225 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:30:15,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 95 places, 94 transitions, 204 flow [2022-11-25 18:30:15,338 INFO L130 PetriNetUnfolder]: 6/92 cut-off events. [2022-11-25 18:30:15,339 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:30:15,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 92 events. 6/92 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 74 event pairs, 0 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2022-11-25 18:30:15,345 INFO L82 GeneralOperation]: Start removeDead. Operand has 95 places, 94 transitions, 204 flow [2022-11-25 18:30:15,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 88 places, 87 transitions, 186 flow [2022-11-25 18:30:15,357 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:30:15,386 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 88 places, 87 transitions, 186 flow [2022-11-25 18:30:15,390 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 88 places, 87 transitions, 186 flow [2022-11-25 18:30:15,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 186 flow [2022-11-25 18:30:15,446 INFO L130 PetriNetUnfolder]: 6/87 cut-off events. [2022-11-25 18:30:15,447 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:30:15,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96 conditions, 87 events. 6/87 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 73 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2022-11-25 18:30:15,453 INFO L119 LiptonReduction]: Number of co-enabled transitions 540 [2022-11-25 18:30:20,139 INFO L134 LiptonReduction]: Checked pairs total: 667 [2022-11-25 18:30:20,139 INFO L136 LiptonReduction]: Total number of compositions: 85 [2022-11-25 18:30:20,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:30:20,167 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;@2767d38b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:30:20,168 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2022-11-25 18:30:20,170 INFO L130 PetriNetUnfolder]: 0/1 cut-off events. [2022-11-25 18:30:20,171 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:30:20,171 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:20,172 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:30:20,172 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:20,179 INFO L85 PathProgramCache]: Analyzing trace with hash 372, now seen corresponding path program 1 times [2022-11-25 18:30:20,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:20,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147231574] [2022-11-25 18:30:20,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:20,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:20,314 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 18:30:20,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:20,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147231574] [2022-11-25 18:30:20,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147231574] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:30:20,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:30:20,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:30:20,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145280630] [2022-11-25 18:30:20,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:30:20,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:30:20,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:20,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:30:20,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:30:20,367 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 179 [2022-11-25 18:30:20,370 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 60 flow. Second operand has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 18:30:20,370 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:20,370 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 179 [2022-11-25 18:30:20,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:20,510 INFO L130 PetriNetUnfolder]: 106/169 cut-off events. [2022-11-25 18:30:20,510 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-25 18:30:20,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 169 events. 106/169 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 544 event pairs, 45 based on Foata normal form. 0/76 useless extension candidates. Maximal degree in co-relation 277. Up to 167 conditions per place. [2022-11-25 18:30:20,516 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 19 selfloop transitions, 0 changer transitions 0/21 dead transitions. [2022-11-25 18:30:20,516 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 21 transitions, 92 flow [2022-11-25 18:30:20,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:30:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:30:20,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 188 transitions. [2022-11-25 18:30:20,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5251396648044693 [2022-11-25 18:30:20,539 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 188 transitions. [2022-11-25 18:30:20,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 188 transitions. [2022-11-25 18:30:20,542 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:20,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 188 transitions. [2022-11-25 18:30:20,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 94.0) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 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 18:30:20,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 18:30:20,564 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 179.0) internal successors, (537), 3 states have internal predecessors, (537), 0 states have call successors, (0), 0 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 18:30:20,567 INFO L175 Difference]: Start difference. First operand has 29 places, 24 transitions, 60 flow. Second operand 2 states and 188 transitions. [2022-11-25 18:30:20,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 21 transitions, 92 flow [2022-11-25 18:30:20,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:30:20,572 INFO L231 Difference]: Finished difference. Result has 23 places, 21 transitions, 46 flow [2022-11-25 18:30:20,574 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=46, PETRI_PLACES=23, PETRI_TRANSITIONS=21} [2022-11-25 18:30:20,579 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-25 18:30:20,580 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 21 transitions, 46 flow [2022-11-25 18:30:20,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.5) internal successors, (167), 2 states have internal predecessors, (167), 0 states have call successors, (0), 0 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 18:30:20,582 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:20,585 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:30:20,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:30:20,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:20,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:20,598 INFO L85 PathProgramCache]: Analyzing trace with hash 363703, now seen corresponding path program 1 times [2022-11-25 18:30:20,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:20,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581018255] [2022-11-25 18:30:20,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:20,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:20,929 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 18:30:20,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:20,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581018255] [2022-11-25 18:30:20,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581018255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:30:20,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:30:20,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:30:20,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323882297] [2022-11-25 18:30:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:30:20,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:30:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:20,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:30:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:30:20,997 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 179 [2022-11-25 18:30:20,997 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 21 transitions, 46 flow. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 18:30:20,998 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:20,998 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 179 [2022-11-25 18:30:20,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:21,085 INFO L130 PetriNetUnfolder]: 99/156 cut-off events. [2022-11-25 18:30:21,086 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:30:21,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 316 conditions, 156 events. 99/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 493 event pairs, 42 based on Foata normal form. 0/73 useless extension candidates. Maximal degree in co-relation 313. Up to 153 conditions per place. [2022-11-25 18:30:21,088 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 16 selfloop transitions, 1 changer transitions 0/19 dead transitions. [2022-11-25 18:30:21,088 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 19 transitions, 76 flow [2022-11-25 18:30:21,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:30:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:30:21,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 253 transitions. [2022-11-25 18:30:21,096 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47113594040968343 [2022-11-25 18:30:21,097 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 253 transitions. [2022-11-25 18:30:21,097 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 253 transitions. [2022-11-25 18:30:21,098 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:21,098 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 253 transitions. [2022-11-25 18:30:21,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 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 18:30:21,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:21,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:21,106 INFO L175 Difference]: Start difference. First operand has 23 places, 21 transitions, 46 flow. Second operand 3 states and 253 transitions. [2022-11-25 18:30:21,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 19 transitions, 76 flow [2022-11-25 18:30:21,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 19 transitions, 76 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:30:21,108 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2022-11-25 18:30:21,108 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2022-11-25 18:30:21,109 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -6 predicate places. [2022-11-25 18:30:21,110 INFO L495 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2022-11-25 18:30:21,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 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 18:30:21,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:21,112 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:30:21,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:30:21,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:21,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:21,117 INFO L85 PathProgramCache]: Analyzing trace with hash 363702, now seen corresponding path program 1 times [2022-11-25 18:30:21,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:21,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545516577] [2022-11-25 18:30:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:21,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:21,182 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 18:30:21,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:21,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545516577] [2022-11-25 18:30:21,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545516577] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:30:21,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:30:21,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:30:21,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213045096] [2022-11-25 18:30:21,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:30:21,185 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:30:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:21,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:30:21,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:30:21,259 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2022-11-25 18:30:21,260 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 18:30:21,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:21,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2022-11-25 18:30:21,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:21,336 INFO L130 PetriNetUnfolder]: 92/143 cut-off events. [2022-11-25 18:30:21,336 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:30:21,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 143 events. 92/143 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 436 event pairs, 39 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 288. Up to 140 conditions per place. [2022-11-25 18:30:21,339 INFO L137 encePairwiseOnDemand]: 176/179 looper letters, 14 selfloop transitions, 1 changer transitions 0/17 dead transitions. [2022-11-25 18:30:21,339 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 17 transitions, 70 flow [2022-11-25 18:30:21,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:30:21,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:30:21,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 239 transitions. [2022-11-25 18:30:21,343 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4450651769087523 [2022-11-25 18:30:21,343 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 239 transitions. [2022-11-25 18:30:21,343 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 239 transitions. [2022-11-25 18:30:21,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:21,344 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 239 transitions. [2022-11-25 18:30:21,345 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 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 18:30:21,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:21,348 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:21,349 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 3 states and 239 transitions. [2022-11-25 18:30:21,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 17 transitions, 70 flow [2022-11-25 18:30:21,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 17 transitions, 69 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:30:21,350 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 41 flow [2022-11-25 18:30:21,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=39, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=41, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2022-11-25 18:30:21,352 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 18:30:21,353 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 41 flow [2022-11-25 18:30:21,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 18:30:21,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:21,354 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:30:21,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:30:21,355 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 349524840, now seen corresponding path program 1 times [2022-11-25 18:30:21,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:21,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120329925] [2022-11-25 18:30:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:21,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:21,548 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 18:30:21,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:21,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120329925] [2022-11-25 18:30:21,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120329925] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:30:21,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:30:21,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:30:21,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231471561] [2022-11-25 18:30:21,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:30:21,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:30:21,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:21,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:30:21,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:30:21,623 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 70 out of 179 [2022-11-25 18:30:21,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 41 flow. Second operand has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 18:30:21,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:21,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 70 of 179 [2022-11-25 18:30:21,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:21,683 INFO L130 PetriNetUnfolder]: 70/112 cut-off events. [2022-11-25 18:30:21,683 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:30:21,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 231 conditions, 112 events. 70/112 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 309 event pairs, 29 based on Foata normal form. 0/60 useless extension candidates. Maximal degree in co-relation 227. Up to 109 conditions per place. [2022-11-25 18:30:21,688 INFO L137 encePairwiseOnDemand]: 177/179 looper letters, 13 selfloop transitions, 1 changer transitions 0/16 dead transitions. [2022-11-25 18:30:21,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 16 transitions, 67 flow [2022-11-25 18:30:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:30:21,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:30:21,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2022-11-25 18:30:21,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41899441340782123 [2022-11-25 18:30:21,691 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2022-11-25 18:30:21,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2022-11-25 18:30:21,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:21,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2022-11-25 18:30:21,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 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 18:30:21,695 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:21,695 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:21,696 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 41 flow. Second operand 3 states and 225 transitions. [2022-11-25 18:30:21,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 16 transitions, 67 flow [2022-11-25 18:30:21,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 16 transitions, 66 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:30:21,697 INFO L231 Difference]: Finished difference. Result has 22 places, 16 transitions, 40 flow [2022-11-25 18:30:21,698 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=40, PETRI_PLACES=22, PETRI_TRANSITIONS=16} [2022-11-25 18:30:21,699 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 18:30:21,699 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 16 transitions, 40 flow [2022-11-25 18:30:21,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.25) internal successors, (285), 4 states have internal predecessors, (285), 0 states have call successors, (0), 0 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 18:30:21,700 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:21,700 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:30:21,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:30:21,700 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:21,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:21,701 INFO L85 PathProgramCache]: Analyzing trace with hash 349524841, now seen corresponding path program 1 times [2022-11-25 18:30:21,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:21,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586120857] [2022-11-25 18:30:21,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:21,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:21,926 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 18:30:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:21,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586120857] [2022-11-25 18:30:21,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586120857] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:30:21,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:30:21,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:30:21,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520938728] [2022-11-25 18:30:21,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:30:21,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:30:21,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:21,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:30:21,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:30:22,022 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 76 out of 179 [2022-11-25 18:30:22,023 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 16 transitions, 40 flow. Second operand has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 18:30:22,023 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:22,023 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 76 of 179 [2022-11-25 18:30:22,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:22,071 INFO L130 PetriNetUnfolder]: 48/81 cut-off events. [2022-11-25 18:30:22,071 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-25 18:30:22,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170 conditions, 81 events. 48/81 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 194 event pairs, 19 based on Foata normal form. 0/50 useless extension candidates. Maximal degree in co-relation 166. Up to 78 conditions per place. [2022-11-25 18:30:22,076 INFO L137 encePairwiseOnDemand]: 177/179 looper letters, 12 selfloop transitions, 1 changer transitions 0/15 dead transitions. [2022-11-25 18:30:22,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 15 transitions, 64 flow [2022-11-25 18:30:22,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:30:22,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:30:22,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 242 transitions. [2022-11-25 18:30:22,079 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4506517690875233 [2022-11-25 18:30:22,079 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 242 transitions. [2022-11-25 18:30:22,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 242 transitions. [2022-11-25 18:30:22,079 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:22,079 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 242 transitions. [2022-11-25 18:30:22,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 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 18:30:22,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:22,083 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 179.0) internal successors, (716), 4 states have internal predecessors, (716), 0 states have call successors, (0), 0 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 18:30:22,083 INFO L175 Difference]: Start difference. First operand has 22 places, 16 transitions, 40 flow. Second operand 3 states and 242 transitions. [2022-11-25 18:30:22,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 15 transitions, 64 flow [2022-11-25 18:30:22,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 15 transitions, 63 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:30:22,086 INFO L231 Difference]: Finished difference. Result has 22 places, 15 transitions, 39 flow [2022-11-25 18:30:22,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=39, PETRI_PLACES=22, PETRI_TRANSITIONS=15} [2022-11-25 18:30:22,090 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -7 predicate places. [2022-11-25 18:30:22,090 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 15 transitions, 39 flow [2022-11-25 18:30:22,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 77.25) internal successors, (309), 4 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 18:30:22,090 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:22,091 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:22,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:30:22,091 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:22,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1324722165, now seen corresponding path program 1 times [2022-11-25 18:30:22,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:22,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575332967] [2022-11-25 18:30:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:22,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:22,221 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 18:30:22,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:22,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575332967] [2022-11-25 18:30:22,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575332967] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:30:22,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:30:22,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:30:22,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977242542] [2022-11-25 18:30:22,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:30:22,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:30:22,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:22,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:30:22,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:30:22,246 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 179 [2022-11-25 18:30:22,247 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 15 transitions, 39 flow. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 18:30:22,247 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:22,248 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 179 [2022-11-25 18:30:22,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:22,309 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2022-11-25 18:30:22,309 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:30:22,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 95 events. 54/95 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 239 event pairs, 9 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 197. Up to 73 conditions per place. [2022-11-25 18:30:22,312 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2022-11-25 18:30:22,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 21 transitions, 92 flow [2022-11-25 18:30:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:30:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:30:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 333 transitions. [2022-11-25 18:30:22,314 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4650837988826816 [2022-11-25 18:30:22,314 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 333 transitions. [2022-11-25 18:30:22,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 333 transitions. [2022-11-25 18:30:22,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:22,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 333 transitions. [2022-11-25 18:30:22,316 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 83.25) internal successors, (333), 4 states have internal predecessors, (333), 0 states have call successors, (0), 0 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 18:30:22,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:22,319 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:22,319 INFO L175 Difference]: Start difference. First operand has 22 places, 15 transitions, 39 flow. Second operand 4 states and 333 transitions. [2022-11-25 18:30:22,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 21 transitions, 92 flow [2022-11-25 18:30:22,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 21 transitions, 91 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:30:22,321 INFO L231 Difference]: Finished difference. Result has 25 places, 16 transitions, 52 flow [2022-11-25 18:30:22,321 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=52, PETRI_PLACES=25, PETRI_TRANSITIONS=16} [2022-11-25 18:30:22,325 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, -4 predicate places. [2022-11-25 18:30:22,325 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 16 transitions, 52 flow [2022-11-25 18:30:22,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 4 states have internal predecessors, (324), 0 states have call successors, (0), 0 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 18:30:22,326 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:22,326 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:22,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:30:22,327 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:22,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:22,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1456404500, now seen corresponding path program 1 times [2022-11-25 18:30:22,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:22,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819417532] [2022-11-25 18:30:22,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:22,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:22,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819417532] [2022-11-25 18:30:22,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819417532] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:30:22,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:30:22,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:30:22,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75330521] [2022-11-25 18:30:22,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:30:22,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:30:22,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:22,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:30:22,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:30:22,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 179 [2022-11-25 18:30:22,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 16 transitions, 52 flow. Second operand has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 18:30:22,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:22,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 179 [2022-11-25 18:30:22,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:22,604 INFO L130 PetriNetUnfolder]: 55/100 cut-off events. [2022-11-25 18:30:22,604 INFO L131 PetriNetUnfolder]: For 33/33 co-relation queries the response was YES. [2022-11-25 18:30:22,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 100 events. 55/100 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 231 event pairs, 24 based on Foata normal form. 2/82 useless extension candidates. Maximal degree in co-relation 254. Up to 76 conditions per place. [2022-11-25 18:30:22,605 INFO L137 encePairwiseOnDemand]: 174/179 looper letters, 20 selfloop transitions, 5 changer transitions 2/27 dead transitions. [2022-11-25 18:30:22,606 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 27 transitions, 132 flow [2022-11-25 18:30:22,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:30:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:30:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 403 transitions. [2022-11-25 18:30:22,608 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.45027932960893857 [2022-11-25 18:30:22,608 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 403 transitions. [2022-11-25 18:30:22,609 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 403 transitions. [2022-11-25 18:30:22,609 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:22,609 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 403 transitions. [2022-11-25 18:30:22,611 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 80.6) internal successors, (403), 5 states have internal predecessors, (403), 0 states have call successors, (0), 0 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 18:30:22,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 18:30:22,613 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 18:30:22,614 INFO L175 Difference]: Start difference. First operand has 25 places, 16 transitions, 52 flow. Second operand 5 states and 403 transitions. [2022-11-25 18:30:22,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 27 transitions, 132 flow [2022-11-25 18:30:22,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 27 transitions, 123 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:30:22,616 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 75 flow [2022-11-25 18:30:22,616 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2022-11-25 18:30:22,617 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 0 predicate places. [2022-11-25 18:30:22,617 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 75 flow [2022-11-25 18:30:22,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 77.8) internal successors, (389), 5 states have internal predecessors, (389), 0 states have call successors, (0), 0 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 18:30:22,618 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:22,618 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:22,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:30:22,619 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:22,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1431939124, now seen corresponding path program 2 times [2022-11-25 18:30:22,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:22,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292350000] [2022-11-25 18:30:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:22,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:22,709 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 18:30:22,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:22,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292350000] [2022-11-25 18:30:22,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292350000] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:22,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839538193] [2022-11-25 18:30:22,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:30:22,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:22,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:22,719 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:22,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:30:22,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:30:22,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:22,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:30:22,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:22,899 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 18:30:22,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:22,934 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 18:30:22,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839538193] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:22,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:22,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-11-25 18:30:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44748830] [2022-11-25 18:30:22,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:22,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:30:22,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:22,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:30:22,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:30:22,988 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 179 [2022-11-25 18:30:22,990 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 19 transitions, 75 flow. Second operand has 8 states, 8 states have (on average 76.75) internal successors, (614), 8 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 18:30:22,990 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:22,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 179 [2022-11-25 18:30:22,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:23,265 INFO L130 PetriNetUnfolder]: 68/121 cut-off events. [2022-11-25 18:30:23,266 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-11-25 18:30:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 121 events. 68/121 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 307 event pairs, 2 based on Foata normal form. 0/101 useless extension candidates. Maximal degree in co-relation 361. Up to 60 conditions per place. [2022-11-25 18:30:23,268 INFO L137 encePairwiseOnDemand]: 173/179 looper letters, 29 selfloop transitions, 13 changer transitions 0/42 dead transitions. [2022-11-25 18:30:23,268 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 42 transitions, 236 flow [2022-11-25 18:30:23,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:30:23,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-25 18:30:23,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 635 transitions. [2022-11-25 18:30:23,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44343575418994413 [2022-11-25 18:30:23,281 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 635 transitions. [2022-11-25 18:30:23,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 635 transitions. [2022-11-25 18:30:23,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:23,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 635 transitions. [2022-11-25 18:30:23,285 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 79.375) internal successors, (635), 8 states have internal predecessors, (635), 0 states have call successors, (0), 0 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 18:30:23,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 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 18:30:23,289 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 179.0) internal successors, (1611), 9 states have internal predecessors, (1611), 0 states have call successors, (0), 0 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 18:30:23,289 INFO L175 Difference]: Start difference. First operand has 29 places, 19 transitions, 75 flow. Second operand 8 states and 635 transitions. [2022-11-25 18:30:23,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 42 transitions, 236 flow [2022-11-25 18:30:23,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 224 flow, removed 1 selfloop flow, removed 2 redundant places. [2022-11-25 18:30:23,295 INFO L231 Difference]: Finished difference. Result has 36 places, 25 transitions, 142 flow [2022-11-25 18:30:23,295 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=142, PETRI_PLACES=36, PETRI_TRANSITIONS=25} [2022-11-25 18:30:23,298 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 7 predicate places. [2022-11-25 18:30:23,298 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 25 transitions, 142 flow [2022-11-25 18:30:23,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 76.75) internal successors, (614), 8 states have internal predecessors, (614), 0 states have call successors, (0), 0 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 18:30:23,299 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:23,299 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:23,318 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:23,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:23,507 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:23,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:23,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1950502251, now seen corresponding path program 1 times [2022-11-25 18:30:23,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:23,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778919824] [2022-11-25 18:30:23,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:23,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:23,616 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:30:23,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:23,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778919824] [2022-11-25 18:30:23,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778919824] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:23,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081475340] [2022-11-25 18:30:23,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:23,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:23,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:23,624 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:23,663 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:30:23,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:23,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:30:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:30:23,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:23,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:30:23,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081475340] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:23,900 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:23,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2022-11-25 18:30:23,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163664334] [2022-11-25 18:30:23,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:23,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:30:23,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:23,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:30:23,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:30:23,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 77 out of 179 [2022-11-25 18:30:23,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 25 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 18:30:23,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:23,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 77 of 179 [2022-11-25 18:30:23,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:24,028 INFO L130 PetriNetUnfolder]: 63/114 cut-off events. [2022-11-25 18:30:24,028 INFO L131 PetriNetUnfolder]: For 177/179 co-relation queries the response was YES. [2022-11-25 18:30:24,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438 conditions, 114 events. 63/114 cut-off events. For 177/179 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 263 event pairs, 14 based on Foata normal form. 2/95 useless extension candidates. Maximal degree in co-relation 428. Up to 81 conditions per place. [2022-11-25 18:30:24,030 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 26 selfloop transitions, 9 changer transitions 0/37 dead transitions. [2022-11-25 18:30:24,030 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 37 transitions, 261 flow [2022-11-25 18:30:24,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:30:24,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:30:24,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 416 transitions. [2022-11-25 18:30:24,033 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.464804469273743 [2022-11-25 18:30:24,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 416 transitions. [2022-11-25 18:30:24,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 416 transitions. [2022-11-25 18:30:24,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:24,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 416 transitions. [2022-11-25 18:30:24,035 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 83.2) internal successors, (416), 5 states have internal predecessors, (416), 0 states have call successors, (0), 0 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 18:30:24,037 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 18:30:24,038 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 18:30:24,038 INFO L175 Difference]: Start difference. First operand has 36 places, 25 transitions, 142 flow. Second operand 5 states and 416 transitions. [2022-11-25 18:30:24,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 37 transitions, 261 flow [2022-11-25 18:30:24,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 239 flow, removed 7 selfloop flow, removed 2 redundant places. [2022-11-25 18:30:24,042 INFO L231 Difference]: Finished difference. Result has 40 places, 27 transitions, 165 flow [2022-11-25 18:30:24,042 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=121, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=165, PETRI_PLACES=40, PETRI_TRANSITIONS=27} [2022-11-25 18:30:24,043 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 11 predicate places. [2022-11-25 18:30:24,043 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 27 transitions, 165 flow [2022-11-25 18:30:24,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 81.0) internal successors, (405), 5 states have internal predecessors, (405), 0 states have call successors, (0), 0 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 18:30:24,044 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:24,044 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:24,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:24,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-25 18:30:24,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:24,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1089396495, now seen corresponding path program 2 times [2022-11-25 18:30:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:24,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973157925] [2022-11-25 18:30:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:24,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:24,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:24,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973157925] [2022-11-25 18:30:24,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973157925] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:24,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663826007] [2022-11-25 18:30:24,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:30:24,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:24,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:24,388 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:24,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:30:24,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:30:24,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:24,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:30:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:24,561 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:24,561 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:24,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663826007] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:24,819 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:24,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 3] total 4 [2022-11-25 18:30:24,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330285691] [2022-11-25 18:30:24,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:24,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:30:24,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:30:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:30:24,831 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 179 [2022-11-25 18:30:24,832 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 27 transitions, 165 flow. Second operand has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 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 18:30:24,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:24,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 179 [2022-11-25 18:30:24,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:24,980 INFO L130 PetriNetUnfolder]: 106/194 cut-off events. [2022-11-25 18:30:24,980 INFO L131 PetriNetUnfolder]: For 1001/1016 co-relation queries the response was YES. [2022-11-25 18:30:24,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 810 conditions, 194 events. 106/194 cut-off events. For 1001/1016 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 598 event pairs, 13 based on Foata normal form. 16/178 useless extension candidates. Maximal degree in co-relation 799. Up to 77 conditions per place. [2022-11-25 18:30:24,982 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 31 selfloop transitions, 10 changer transitions 4/50 dead transitions. [2022-11-25 18:30:24,983 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 50 transitions, 371 flow [2022-11-25 18:30:24,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:30:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:30:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 363 transitions. [2022-11-25 18:30:24,985 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5069832402234636 [2022-11-25 18:30:24,985 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 363 transitions. [2022-11-25 18:30:24,985 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 363 transitions. [2022-11-25 18:30:24,986 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:24,986 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 363 transitions. [2022-11-25 18:30:24,987 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 90.75) internal successors, (363), 4 states have internal predecessors, (363), 0 states have call successors, (0), 0 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 18:30:24,989 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:24,990 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 179.0) internal successors, (895), 5 states have internal predecessors, (895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:24,990 INFO L175 Difference]: Start difference. First operand has 40 places, 27 transitions, 165 flow. Second operand 4 states and 363 transitions. [2022-11-25 18:30:24,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 50 transitions, 371 flow [2022-11-25 18:30:24,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 333 flow, removed 16 selfloop flow, removed 1 redundant places. [2022-11-25 18:30:24,998 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 217 flow [2022-11-25 18:30:24,999 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2022-11-25 18:30:25,000 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2022-11-25 18:30:25,001 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 217 flow [2022-11-25 18:30:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 85.5) internal successors, (513), 6 states have internal predecessors, (513), 0 states have call successors, (0), 0 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 18:30:25,001 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:25,002 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:25,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:25,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:25,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:25,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:25,212 INFO L85 PathProgramCache]: Analyzing trace with hash 538637604, now seen corresponding path program 3 times [2022-11-25 18:30:25,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:25,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419775199] [2022-11-25 18:30:25,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:25,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:25,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:25,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419775199] [2022-11-25 18:30:25,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419775199] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:25,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578741209] [2022-11-25 18:30:25,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:30:25,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:25,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:25,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:25,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:30:25,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-25 18:30:25,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:25,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:30:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:25,706 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:25,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:25,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578741209] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:25,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:25,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2022-11-25 18:30:25,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551072901] [2022-11-25 18:30:25,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:25,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 18:30:25,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 18:30:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-25 18:30:26,056 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:26,058 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 217 flow. Second operand has 17 states, 17 states have (on average 75.3529411764706) internal successors, (1281), 17 states have internal predecessors, (1281), 0 states have call successors, (0), 0 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 18:30:26,058 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:26,058 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:26,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:26,744 INFO L130 PetriNetUnfolder]: 214/383 cut-off events. [2022-11-25 18:30:26,744 INFO L131 PetriNetUnfolder]: For 1580/1580 co-relation queries the response was YES. [2022-11-25 18:30:26,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1578 conditions, 383 events. 214/383 cut-off events. For 1580/1580 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1414 event pairs, 1 based on Foata normal form. 34/417 useless extension candidates. Maximal degree in co-relation 1565. Up to 126 conditions per place. [2022-11-25 18:30:26,749 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 64 selfloop transitions, 40 changer transitions 1/105 dead transitions. [2022-11-25 18:30:26,749 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 105 transitions, 776 flow [2022-11-25 18:30:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:30:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:30:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1337 transitions. [2022-11-25 18:30:26,780 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43936904370686825 [2022-11-25 18:30:26,780 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1337 transitions. [2022-11-25 18:30:26,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1337 transitions. [2022-11-25 18:30:26,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:26,782 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1337 transitions. [2022-11-25 18:30:26,786 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 78.6470588235294) internal successors, (1337), 17 states have internal predecessors, (1337), 0 states have call successors, (0), 0 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 18:30:26,793 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 179.0) internal successors, (3222), 18 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 18:30:26,795 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 179.0) internal successors, (3222), 18 states have internal predecessors, (3222), 0 states have call successors, (0), 0 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 18:30:26,795 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 217 flow. Second operand 17 states and 1337 transitions. [2022-11-25 18:30:26,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 105 transitions, 776 flow [2022-11-25 18:30:26,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 105 transitions, 776 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:30:26,805 INFO L231 Difference]: Finished difference. Result has 69 places, 60 transitions, 601 flow [2022-11-25 18:30:26,805 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=217, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=10, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=601, PETRI_PLACES=69, PETRI_TRANSITIONS=60} [2022-11-25 18:30:26,806 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2022-11-25 18:30:26,806 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 60 transitions, 601 flow [2022-11-25 18:30:26,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 75.3529411764706) internal successors, (1281), 17 states have internal predecessors, (1281), 0 states have call successors, (0), 0 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 18:30:26,807 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:26,807 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:26,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:27,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:27,014 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:27,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:27,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1994437655, now seen corresponding path program 4 times [2022-11-25 18:30:27,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:27,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175259716] [2022-11-25 18:30:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:27,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:27,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:27,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:27,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175259716] [2022-11-25 18:30:27,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175259716] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:27,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230566417] [2022-11-25 18:30:27,184 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:30:27,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:27,185 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:27,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:30:27,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:30:27,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:27,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:30:27,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:27,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:27,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230566417] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:27,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:27,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-11-25 18:30:27,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218976361] [2022-11-25 18:30:27,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:27,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:30:27,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:27,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:30:27,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:30:27,656 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:27,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 60 transitions, 601 flow. Second operand has 18 states, 18 states have (on average 75.0) internal successors, (1350), 18 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:27,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:27,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:27,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:28,410 INFO L130 PetriNetUnfolder]: 371/693 cut-off events. [2022-11-25 18:30:28,411 INFO L131 PetriNetUnfolder]: For 8178/8178 co-relation queries the response was YES. [2022-11-25 18:30:28,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4158 conditions, 693 events. 371/693 cut-off events. For 8178/8178 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3241 event pairs, 12 based on Foata normal form. 12/705 useless extension candidates. Maximal degree in co-relation 4135. Up to 243 conditions per place. [2022-11-25 18:30:28,420 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 98 selfloop transitions, 71 changer transitions 6/175 dead transitions. [2022-11-25 18:30:28,420 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 175 transitions, 1964 flow [2022-11-25 18:30:28,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:30:28,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:30:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1638 transitions. [2022-11-25 18:30:28,426 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43575418994413406 [2022-11-25 18:30:28,427 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1638 transitions. [2022-11-25 18:30:28,427 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1638 transitions. [2022-11-25 18:30:28,428 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:28,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1638 transitions. [2022-11-25 18:30:28,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 78.0) internal successors, (1638), 21 states have internal predecessors, (1638), 0 states have call successors, (0), 0 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 18:30:28,440 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 179.0) internal successors, (3938), 22 states have internal predecessors, (3938), 0 states have call successors, (0), 0 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 18:30:28,442 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 179.0) internal successors, (3938), 22 states have internal predecessors, (3938), 0 states have call successors, (0), 0 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 18:30:28,442 INFO L175 Difference]: Start difference. First operand has 69 places, 60 transitions, 601 flow. Second operand 21 states and 1638 transitions. [2022-11-25 18:30:28,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 175 transitions, 1964 flow [2022-11-25 18:30:28,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 175 transitions, 1755 flow, removed 98 selfloop flow, removed 3 redundant places. [2022-11-25 18:30:28,469 INFO L231 Difference]: Finished difference. Result has 93 places, 107 transitions, 1273 flow [2022-11-25 18:30:28,470 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=467, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1273, PETRI_PLACES=93, PETRI_TRANSITIONS=107} [2022-11-25 18:30:28,471 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2022-11-25 18:30:28,471 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 107 transitions, 1273 flow [2022-11-25 18:30:28,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.0) internal successors, (1350), 18 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:30:28,472 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:28,472 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:28,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:28,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 18:30:28,679 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:28,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:28,681 INFO L85 PathProgramCache]: Analyzing trace with hash 2066599246, now seen corresponding path program 5 times [2022-11-25 18:30:28,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:28,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989984298] [2022-11-25 18:30:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:28,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:28,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989984298] [2022-11-25 18:30:28,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989984298] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:28,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788988301] [2022-11-25 18:30:28,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:30:28,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:28,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:28,890 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:28,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:30:28,990 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:30:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:30:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:29,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788988301] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:29,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:29,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:30:29,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799887910] [2022-11-25 18:30:29,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:29,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:30:29,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:29,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:30:29,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:30:29,452 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:29,454 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 107 transitions, 1273 flow. Second operand has 16 states, 16 states have (on average 75.4375) internal successors, (1207), 16 states have internal predecessors, (1207), 0 states have call successors, (0), 0 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 18:30:29,454 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:29,454 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:29,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:30,326 INFO L130 PetriNetUnfolder]: 509/974 cut-off events. [2022-11-25 18:30:30,327 INFO L131 PetriNetUnfolder]: For 17516/17516 co-relation queries the response was YES. [2022-11-25 18:30:30,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6572 conditions, 974 events. 509/974 cut-off events. For 17516/17516 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 5153 event pairs, 44 based on Foata normal form. 12/986 useless extension candidates. Maximal degree in co-relation 6542. Up to 303 conditions per place. [2022-11-25 18:30:30,342 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 110 selfloop transitions, 97 changer transitions 25/232 dead transitions. [2022-11-25 18:30:30,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 232 transitions, 3073 flow [2022-11-25 18:30:30,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-25 18:30:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2022-11-25 18:30:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1265 transitions. [2022-11-25 18:30:30,347 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4416899441340782 [2022-11-25 18:30:30,347 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1265 transitions. [2022-11-25 18:30:30,347 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1265 transitions. [2022-11-25 18:30:30,348 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:30,348 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1265 transitions. [2022-11-25 18:30:30,351 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 79.0625) internal successors, (1265), 16 states have internal predecessors, (1265), 0 states have call successors, (0), 0 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 18:30:30,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 179.0) internal successors, (3043), 17 states have internal predecessors, (3043), 0 states have call successors, (0), 0 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 18:30:30,358 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 179.0) internal successors, (3043), 17 states have internal predecessors, (3043), 0 states have call successors, (0), 0 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 18:30:30,358 INFO L175 Difference]: Start difference. First operand has 93 places, 107 transitions, 1273 flow. Second operand 16 states and 1265 transitions. [2022-11-25 18:30:30,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 232 transitions, 3073 flow [2022-11-25 18:30:30,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 232 transitions, 2495 flow, removed 282 selfloop flow, removed 3 redundant places. [2022-11-25 18:30:30,414 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1784 flow [2022-11-25 18:30:30,415 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1784, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2022-11-25 18:30:30,416 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2022-11-25 18:30:30,416 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1784 flow [2022-11-25 18:30:30,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.4375) internal successors, (1207), 16 states have internal predecessors, (1207), 0 states have call successors, (0), 0 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 18:30:30,417 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:30,417 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:30,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:30,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:30:30,624 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:30,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:30,625 INFO L85 PathProgramCache]: Analyzing trace with hash -360741237, now seen corresponding path program 6 times [2022-11-25 18:30:30,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:30,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767000620] [2022-11-25 18:30:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:30,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:30,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:30,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767000620] [2022-11-25 18:30:30,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767000620] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:30,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778027560] [2022-11-25 18:30:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:30:30,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:30,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:30,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:30:30,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-25 18:30:30,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:30,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:30:30,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:30,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:31,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778027560] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:31,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:31,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 5] total 7 [2022-11-25 18:30:31,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734144758] [2022-11-25 18:30:31,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:31,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:30:31,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:31,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:30:31,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:30:31,272 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 179 [2022-11-25 18:30:31,273 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1784 flow. Second operand has 9 states, 9 states have (on average 85.0) internal successors, (765), 9 states have internal predecessors, (765), 0 states have call successors, (0), 0 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 18:30:31,273 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:31,274 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 179 [2022-11-25 18:30:31,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:31,766 INFO L130 PetriNetUnfolder]: 746/1430 cut-off events. [2022-11-25 18:30:31,766 INFO L131 PetriNetUnfolder]: For 25922/25926 co-relation queries the response was YES. [2022-11-25 18:30:31,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9468 conditions, 1430 events. 746/1430 cut-off events. For 25922/25926 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8452 event pairs, 125 based on Foata normal form. 7/1431 useless extension candidates. Maximal degree in co-relation 9433. Up to 624 conditions per place. [2022-11-25 18:30:31,789 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 159 selfloop transitions, 65 changer transitions 31/263 dead transitions. [2022-11-25 18:30:31,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 263 transitions, 3634 flow [2022-11-25 18:30:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-25 18:30:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-11-25 18:30:31,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 456 transitions. [2022-11-25 18:30:31,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5094972067039106 [2022-11-25 18:30:31,792 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 456 transitions. [2022-11-25 18:30:31,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 456 transitions. [2022-11-25 18:30:31,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:31,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 456 transitions. [2022-11-25 18:30:31,795 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 91.2) internal successors, (456), 5 states have internal predecessors, (456), 0 states have call successors, (0), 0 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 18:30:31,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 18:30:31,797 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 179.0) internal successors, (1074), 6 states have internal predecessors, (1074), 0 states have call successors, (0), 0 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 18:30:31,797 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1784 flow. Second operand 5 states and 456 transitions. [2022-11-25 18:30:31,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 263 transitions, 3634 flow [2022-11-25 18:30:31,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 263 transitions, 3489 flow, removed 55 selfloop flow, removed 7 redundant places. [2022-11-25 18:30:31,908 INFO L231 Difference]: Finished difference. Result has 110 places, 185 transitions, 2565 flow [2022-11-25 18:30:31,909 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2565, PETRI_PLACES=110, PETRI_TRANSITIONS=185} [2022-11-25 18:30:31,910 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 81 predicate places. [2022-11-25 18:30:31,910 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 185 transitions, 2565 flow [2022-11-25 18:30:31,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 85.0) internal successors, (765), 9 states have internal predecessors, (765), 0 states have call successors, (0), 0 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 18:30:31,911 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:31,911 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:31,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 18:30:32,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:30:32,118 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:32,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:32,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1058124292, now seen corresponding path program 7 times [2022-11-25 18:30:32,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:32,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436187555] [2022-11-25 18:30:32,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:32,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:32,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:32,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436187555] [2022-11-25 18:30:32,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436187555] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:32,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885046479] [2022-11-25 18:30:32,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:30:32,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:32,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:32,286 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:32,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:30:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:32,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:30:32,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:32,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:32,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:32,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885046479] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:32,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:32,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2022-11-25 18:30:32,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947593373] [2022-11-25 18:30:32,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:32,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:30:32,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:32,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:30:32,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:30:32,791 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:32,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 185 transitions, 2565 flow. Second operand has 16 states, 16 states have (on average 75.375) internal successors, (1206), 16 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 18:30:32,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:32,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:32,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:33,927 INFO L130 PetriNetUnfolder]: 770/1540 cut-off events. [2022-11-25 18:30:33,927 INFO L131 PetriNetUnfolder]: For 30363/30363 co-relation queries the response was YES. [2022-11-25 18:30:33,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10546 conditions, 1540 events. 770/1540 cut-off events. For 30363/30363 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 9538 event pairs, 59 based on Foata normal form. 56/1596 useless extension candidates. Maximal degree in co-relation 10508. Up to 506 conditions per place. [2022-11-25 18:30:33,950 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 121 selfloop transitions, 153 changer transitions 11/285 dead transitions. [2022-11-25 18:30:33,950 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 285 transitions, 4014 flow [2022-11-25 18:30:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:30:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-25 18:30:33,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1726 transitions. [2022-11-25 18:30:33,959 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4382935500253936 [2022-11-25 18:30:33,959 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1726 transitions. [2022-11-25 18:30:33,959 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1726 transitions. [2022-11-25 18:30:33,961 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:33,961 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1726 transitions. [2022-11-25 18:30:33,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 78.45454545454545) internal successors, (1726), 22 states have internal predecessors, (1726), 0 states have call successors, (0), 0 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 18:30:33,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 0 states have call successors, (0), 0 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 18:30:33,976 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 179.0) internal successors, (4117), 23 states have internal predecessors, (4117), 0 states have call successors, (0), 0 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 18:30:33,976 INFO L175 Difference]: Start difference. First operand has 110 places, 185 transitions, 2565 flow. Second operand 22 states and 1726 transitions. [2022-11-25 18:30:33,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 285 transitions, 4014 flow [2022-11-25 18:30:34,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 285 transitions, 3940 flow, removed 32 selfloop flow, removed 1 redundant places. [2022-11-25 18:30:34,082 INFO L231 Difference]: Finished difference. Result has 134 places, 205 transitions, 3288 flow [2022-11-25 18:30:34,082 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=3288, PETRI_PLACES=134, PETRI_TRANSITIONS=205} [2022-11-25 18:30:34,083 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 105 predicate places. [2022-11-25 18:30:34,084 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 205 transitions, 3288 flow [2022-11-25 18:30:34,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.375) internal successors, (1206), 16 states have internal predecessors, (1206), 0 states have call successors, (0), 0 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 18:30:34,085 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:34,085 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:34,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:34,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:34,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:34,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1628683648, now seen corresponding path program 8 times [2022-11-25 18:30:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150250669] [2022-11-25 18:30:34,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:34,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:34,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:34,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:34,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:34,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150250669] [2022-11-25 18:30:34,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150250669] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:34,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803262212] [2022-11-25 18:30:34,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:30:34,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:34,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:34,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:34,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:30:34,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:30:34,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:34,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:30:34,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:34,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:34,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803262212] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:34,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:34,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2022-11-25 18:30:34,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456444163] [2022-11-25 18:30:34,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:34,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-25 18:30:34,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-25 18:30:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2022-11-25 18:30:35,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:35,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 205 transitions, 3288 flow. Second operand has 18 states, 18 states have (on average 75.38888888888889) internal successors, (1357), 18 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 18:30:35,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:35,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:35,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:36,322 INFO L130 PetriNetUnfolder]: 931/1913 cut-off events. [2022-11-25 18:30:36,323 INFO L131 PetriNetUnfolder]: For 53068/53068 co-relation queries the response was YES. [2022-11-25 18:30:36,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14115 conditions, 1913 events. 931/1913 cut-off events. For 53068/53068 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 12790 event pairs, 139 based on Foata normal form. 96/2009 useless extension candidates. Maximal degree in co-relation 14073. Up to 1328 conditions per place. [2022-11-25 18:30:36,357 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 225 selfloop transitions, 88 changer transitions 8/321 dead transitions. [2022-11-25 18:30:36,357 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 321 transitions, 5314 flow [2022-11-25 18:30:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:30:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:30:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1575 transitions. [2022-11-25 18:30:36,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4399441340782123 [2022-11-25 18:30:36,362 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1575 transitions. [2022-11-25 18:30:36,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1575 transitions. [2022-11-25 18:30:36,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:36,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1575 transitions. [2022-11-25 18:30:36,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 78.75) internal successors, (1575), 20 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 18:30:36,373 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 18:30:36,375 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 18:30:36,375 INFO L175 Difference]: Start difference. First operand has 134 places, 205 transitions, 3288 flow. Second operand 20 states and 1575 transitions. [2022-11-25 18:30:36,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 321 transitions, 5314 flow [2022-11-25 18:30:36,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 321 transitions, 5198 flow, removed 25 selfloop flow, removed 12 redundant places. [2022-11-25 18:30:36,586 INFO L231 Difference]: Finished difference. Result has 147 places, 248 transitions, 4400 flow [2022-11-25 18:30:36,586 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3174, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4400, PETRI_PLACES=147, PETRI_TRANSITIONS=248} [2022-11-25 18:30:36,587 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 118 predicate places. [2022-11-25 18:30:36,587 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 248 transitions, 4400 flow [2022-11-25 18:30:36,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 75.38888888888889) internal successors, (1357), 18 states have internal predecessors, (1357), 0 states have call successors, (0), 0 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 18:30:36,588 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:36,588 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:36,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-25 18:30:36,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:30:36,795 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:36,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash 978887296, now seen corresponding path program 9 times [2022-11-25 18:30:36,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:36,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238189403] [2022-11-25 18:30:36,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:37,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:37,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238189403] [2022-11-25 18:30:37,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238189403] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:37,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627503081] [2022-11-25 18:30:37,009 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:30:37,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:37,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:37,011 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:37,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:30:37,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:30:37,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:37,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:30:37,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:37,234 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:37,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:37,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:37,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627503081] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:37,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:37,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 16 [2022-11-25 18:30:37,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965544537] [2022-11-25 18:30:37,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:37,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:30:37,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:30:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:30:37,480 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:37,482 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 248 transitions, 4400 flow. Second operand has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 18:30:37,482 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:37,483 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:37,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:38,655 INFO L130 PetriNetUnfolder]: 913/1867 cut-off events. [2022-11-25 18:30:38,655 INFO L131 PetriNetUnfolder]: For 61632/61632 co-relation queries the response was YES. [2022-11-25 18:30:38,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15614 conditions, 1867 events. 913/1867 cut-off events. For 61632/61632 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 12407 event pairs, 37 based on Foata normal form. 8/1875 useless extension candidates. Maximal degree in co-relation 15569. Up to 556 conditions per place. [2022-11-25 18:30:38,687 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 186 selfloop transitions, 125 changer transitions 8/319 dead transitions. [2022-11-25 18:30:38,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 319 transitions, 5831 flow [2022-11-25 18:30:38,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:30:38,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:30:38,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1555 transitions. [2022-11-25 18:30:38,692 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43435754189944137 [2022-11-25 18:30:38,692 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1555 transitions. [2022-11-25 18:30:38,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1555 transitions. [2022-11-25 18:30:38,693 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:38,693 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1555 transitions. [2022-11-25 18:30:38,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 77.75) internal successors, (1555), 20 states have internal predecessors, (1555), 0 states have call successors, (0), 0 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 18:30:38,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 18:30:38,704 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 179.0) internal successors, (3759), 21 states have internal predecessors, (3759), 0 states have call successors, (0), 0 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 18:30:38,704 INFO L175 Difference]: Start difference. First operand has 147 places, 248 transitions, 4400 flow. Second operand 20 states and 1555 transitions. [2022-11-25 18:30:38,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 319 transitions, 5831 flow [2022-11-25 18:30:38,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 319 transitions, 5387 flow, removed 181 selfloop flow, removed 11 redundant places. [2022-11-25 18:30:38,894 INFO L231 Difference]: Finished difference. Result has 159 places, 260 transitions, 4568 flow [2022-11-25 18:30:38,895 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=3998, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=4568, PETRI_PLACES=159, PETRI_TRANSITIONS=260} [2022-11-25 18:30:38,895 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 130 predicate places. [2022-11-25 18:30:38,895 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 260 transitions, 4568 flow [2022-11-25 18:30:38,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.25) internal successors, (1204), 16 states have internal predecessors, (1204), 0 states have call successors, (0), 0 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 18:30:38,896 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:38,896 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:38,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:39,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:39,100 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:39,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash -150947223, now seen corresponding path program 10 times [2022-11-25 18:30:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:39,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930850986] [2022-11-25 18:30:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:39,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:39,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:39,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:39,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:39,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930850986] [2022-11-25 18:30:39,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930850986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:39,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236142726] [2022-11-25 18:30:39,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:30:39,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:39,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:39,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:39,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:30:39,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:30:39,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:39,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:30:39,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:39,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:39,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:39,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236142726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:39,967 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:39,968 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-11-25 18:30:39,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057634351] [2022-11-25 18:30:39,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:39,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 18:30:39,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 18:30:39,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:30:40,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:40,090 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 260 transitions, 4568 flow. Second operand has 19 states, 19 states have (on average 74.94736842105263) internal successors, (1424), 19 states have internal predecessors, (1424), 0 states have call successors, (0), 0 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 18:30:40,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:40,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:40,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:41,816 INFO L130 PetriNetUnfolder]: 1097/2289 cut-off events. [2022-11-25 18:30:41,816 INFO L131 PetriNetUnfolder]: For 125363/125363 co-relation queries the response was YES. [2022-11-25 18:30:41,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19873 conditions, 2289 events. 1097/2289 cut-off events. For 125363/125363 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 15920 event pairs, 109 based on Foata normal form. 152/2441 useless extension candidates. Maximal degree in co-relation 19825. Up to 684 conditions per place. [2022-11-25 18:30:41,843 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 209 selfloop transitions, 201 changer transitions 54/464 dead transitions. [2022-11-25 18:30:41,843 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 464 transitions, 8268 flow [2022-11-25 18:30:41,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 18:30:41,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 18:30:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2224 transitions. [2022-11-25 18:30:41,854 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44373503591380686 [2022-11-25 18:30:41,856 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2224 transitions. [2022-11-25 18:30:41,857 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2224 transitions. [2022-11-25 18:30:41,858 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:41,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2224 transitions. [2022-11-25 18:30:41,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 79.42857142857143) internal successors, (2224), 28 states have internal predecessors, (2224), 0 states have call successors, (0), 0 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 18:30:41,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 179.0) internal successors, (5191), 29 states have internal predecessors, (5191), 0 states have call successors, (0), 0 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 18:30:41,874 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 179.0) internal successors, (5191), 29 states have internal predecessors, (5191), 0 states have call successors, (0), 0 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 18:30:41,874 INFO L175 Difference]: Start difference. First operand has 159 places, 260 transitions, 4568 flow. Second operand 28 states and 2224 transitions. [2022-11-25 18:30:41,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 464 transitions, 8268 flow [2022-11-25 18:30:42,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 464 transitions, 7907 flow, removed 154 selfloop flow, removed 6 redundant places. [2022-11-25 18:30:42,215 INFO L231 Difference]: Finished difference. Result has 193 places, 312 transitions, 6323 flow [2022-11-25 18:30:42,215 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=4289, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=6323, PETRI_PLACES=193, PETRI_TRANSITIONS=312} [2022-11-25 18:30:42,215 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 164 predicate places. [2022-11-25 18:30:42,215 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 312 transitions, 6323 flow [2022-11-25 18:30:42,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 74.94736842105263) internal successors, (1424), 19 states have internal predecessors, (1424), 0 states have call successors, (0), 0 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 18:30:42,216 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:42,216 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:42,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-11-25 18:30:42,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:30:42,427 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:42,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:42,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1959344730, now seen corresponding path program 11 times [2022-11-25 18:30:42,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:42,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323223406] [2022-11-25 18:30:42,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:42,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:42,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:42,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:42,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323223406] [2022-11-25 18:30:42,663 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323223406] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:42,663 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186581993] [2022-11-25 18:30:42,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:30:42,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:42,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:42,665 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:42,695 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:30:42,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-25 18:30:42,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:42,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:30:42,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:42,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:43,270 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:43,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186581993] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:43,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:43,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-25 18:30:43,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898065018] [2022-11-25 18:30:43,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:43,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:30:43,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:43,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:30:43,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:30:43,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:43,491 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 312 transitions, 6323 flow. Second operand has 21 states, 21 states have (on average 75.0952380952381) internal successors, (1577), 21 states have internal predecessors, (1577), 0 states have call successors, (0), 0 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 18:30:43,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:43,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:45,473 INFO L130 PetriNetUnfolder]: 1366/2823 cut-off events. [2022-11-25 18:30:45,473 INFO L131 PetriNetUnfolder]: For 202550/202550 co-relation queries the response was YES. [2022-11-25 18:30:45,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29095 conditions, 2823 events. 1366/2823 cut-off events. For 202550/202550 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 20432 event pairs, 94 based on Foata normal form. 24/2847 useless extension candidates. Maximal degree in co-relation 29033. Up to 763 conditions per place. [2022-11-25 18:30:45,535 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 170 selfloop transitions, 315 changer transitions 58/543 dead transitions. [2022-11-25 18:30:45,536 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 543 transitions, 10679 flow [2022-11-25 18:30:45,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-25 18:30:45,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-25 18:30:45,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1903 transitions. [2022-11-25 18:30:45,545 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44297020484171323 [2022-11-25 18:30:45,545 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1903 transitions. [2022-11-25 18:30:45,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1903 transitions. [2022-11-25 18:30:45,549 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:45,549 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1903 transitions. [2022-11-25 18:30:45,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 79.29166666666667) internal successors, (1903), 24 states have internal predecessors, (1903), 0 states have call successors, (0), 0 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 18:30:45,565 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 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 18:30:45,566 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 179.0) internal successors, (4475), 25 states have internal predecessors, (4475), 0 states have call successors, (0), 0 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 18:30:45,566 INFO L175 Difference]: Start difference. First operand has 193 places, 312 transitions, 6323 flow. Second operand 24 states and 1903 transitions. [2022-11-25 18:30:45,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 543 transitions, 10679 flow [2022-11-25 18:30:46,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 543 transitions, 10017 flow, removed 193 selfloop flow, removed 14 redundant places. [2022-11-25 18:30:46,384 INFO L231 Difference]: Finished difference. Result has 208 places, 381 transitions, 8391 flow [2022-11-25 18:30:46,385 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=5807, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=246, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=8391, PETRI_PLACES=208, PETRI_TRANSITIONS=381} [2022-11-25 18:30:46,385 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 179 predicate places. [2022-11-25 18:30:46,386 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 381 transitions, 8391 flow [2022-11-25 18:30:46,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.0952380952381) internal successors, (1577), 21 states have internal predecessors, (1577), 0 states have call successors, (0), 0 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 18:30:46,386 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:46,387 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:46,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:46,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:46,594 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:46,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:46,596 INFO L85 PathProgramCache]: Analyzing trace with hash -610952909, now seen corresponding path program 12 times [2022-11-25 18:30:46,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:46,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006357986] [2022-11-25 18:30:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:46,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:46,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:46,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006357986] [2022-11-25 18:30:46,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006357986] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:46,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398065094] [2022-11-25 18:30:46,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:30:46,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:46,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:46,873 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:46,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:30:46,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-25 18:30:46,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:30:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:47,055 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:47,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398065094] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:47,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:47,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7] total 10 [2022-11-25 18:30:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791551112] [2022-11-25 18:30:47,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:47,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:30:47,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:30:47,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:30:47,441 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 179 [2022-11-25 18:30:47,442 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 381 transitions, 8391 flow. Second operand has 12 states, 12 states have (on average 84.58333333333333) internal successors, (1015), 12 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 18:30:47,442 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:47,442 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 179 [2022-11-25 18:30:47,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:49,277 INFO L130 PetriNetUnfolder]: 1994/4075 cut-off events. [2022-11-25 18:30:49,278 INFO L131 PetriNetUnfolder]: For 314526/314530 co-relation queries the response was YES. [2022-11-25 18:30:49,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44271 conditions, 4075 events. 1994/4075 cut-off events. For 314526/314530 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 31321 event pairs, 346 based on Foata normal form. 6/4075 useless extension candidates. Maximal degree in co-relation 44206. Up to 1473 conditions per place. [2022-11-25 18:30:49,363 INFO L137 encePairwiseOnDemand]: 175/179 looper letters, 313 selfloop transitions, 281 changer transitions 47/650 dead transitions. [2022-11-25 18:30:49,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 650 transitions, 14934 flow [2022-11-25 18:30:49,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:30:49,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:30:49,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 549 transitions. [2022-11-25 18:30:49,366 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5111731843575419 [2022-11-25 18:30:49,366 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 549 transitions. [2022-11-25 18:30:49,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 549 transitions. [2022-11-25 18:30:49,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:49,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 549 transitions. [2022-11-25 18:30:49,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.5) internal successors, (549), 6 states have internal predecessors, (549), 0 states have call successors, (0), 0 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 18:30:49,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 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 18:30:49,371 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 179.0) internal successors, (1253), 7 states have internal predecessors, (1253), 0 states have call successors, (0), 0 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 18:30:49,371 INFO L175 Difference]: Start difference. First operand has 208 places, 381 transitions, 8391 flow. Second operand 6 states and 549 transitions. [2022-11-25 18:30:49,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 650 transitions, 14934 flow [2022-11-25 18:30:50,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 650 transitions, 14464 flow, removed 214 selfloop flow, removed 8 redundant places. [2022-11-25 18:30:50,326 INFO L231 Difference]: Finished difference. Result has 209 places, 528 transitions, 12906 flow [2022-11-25 18:30:50,327 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=8121, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12906, PETRI_PLACES=209, PETRI_TRANSITIONS=528} [2022-11-25 18:30:50,327 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 180 predicate places. [2022-11-25 18:30:50,327 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 528 transitions, 12906 flow [2022-11-25 18:30:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 84.58333333333333) internal successors, (1015), 12 states have internal predecessors, (1015), 0 states have call successors, (0), 0 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 18:30:50,328 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:50,328 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:50,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:50,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:50,528 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:50,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1664976970, now seen corresponding path program 13 times [2022-11-25 18:30:50,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:50,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742187375] [2022-11-25 18:30:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:50,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:50,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:50,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742187375] [2022-11-25 18:30:50,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742187375] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:50,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191898807] [2022-11-25 18:30:50,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:30:50,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:50,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:50,760 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:50,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:30:50,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:50,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:30:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:51,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:51,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191898807] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:51,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:51,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-25 18:30:51,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263599580] [2022-11-25 18:30:51,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:51,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:30:51,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:51,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:30:51,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:30:51,505 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:51,507 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 528 transitions, 12906 flow. Second operand has 22 states, 22 states have (on average 75.0909090909091) internal successors, (1652), 22 states have internal predecessors, (1652), 0 states have call successors, (0), 0 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 18:30:51,507 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:51,507 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:51,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:30:54,609 INFO L130 PetriNetUnfolder]: 2206/4537 cut-off events. [2022-11-25 18:30:54,609 INFO L131 PetriNetUnfolder]: For 373918/373918 co-relation queries the response was YES. [2022-11-25 18:30:54,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50021 conditions, 4537 events. 2206/4537 cut-off events. For 373918/373918 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 35851 event pairs, 117 based on Foata normal form. 68/4605 useless extension candidates. Maximal degree in co-relation 49952. Up to 1693 conditions per place. [2022-11-25 18:30:54,696 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 194 selfloop transitions, 510 changer transitions 24/728 dead transitions. [2022-11-25 18:30:54,697 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 728 transitions, 17440 flow [2022-11-25 18:30:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 18:30:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 18:30:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2050 transitions. [2022-11-25 18:30:54,704 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44048130640309413 [2022-11-25 18:30:54,704 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2050 transitions. [2022-11-25 18:30:54,704 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2050 transitions. [2022-11-25 18:30:54,706 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:30:54,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2050 transitions. [2022-11-25 18:30:54,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 78.84615384615384) internal successors, (2050), 26 states have internal predecessors, (2050), 0 states have call successors, (0), 0 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 18:30:54,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 179.0) internal successors, (4833), 27 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 18:30:54,723 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 179.0) internal successors, (4833), 27 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 18:30:54,723 INFO L175 Difference]: Start difference. First operand has 209 places, 528 transitions, 12906 flow. Second operand 26 states and 2050 transitions. [2022-11-25 18:30:54,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 728 transitions, 17440 flow [2022-11-25 18:30:55,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 728 transitions, 17263 flow, removed 82 selfloop flow, removed 1 redundant places. [2022-11-25 18:30:56,039 INFO L231 Difference]: Finished difference. Result has 242 places, 609 transitions, 16509 flow [2022-11-25 18:30:56,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=12757, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=430, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=16509, PETRI_PLACES=242, PETRI_TRANSITIONS=609} [2022-11-25 18:30:56,041 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 213 predicate places. [2022-11-25 18:30:56,041 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 609 transitions, 16509 flow [2022-11-25 18:30:56,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.0909090909091) internal successors, (1652), 22 states have internal predecessors, (1652), 0 states have call successors, (0), 0 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 18:30:56,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:30:56,042 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:30:56,051 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:30:56,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-25 18:30:56,248 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:30:56,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:30:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1648827482, now seen corresponding path program 14 times [2022-11-25 18:30:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:30:56,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603363552] [2022-11-25 18:30:56,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:30:56,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:30:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:30:56,464 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:56,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:30:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603363552] [2022-11-25 18:30:56,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603363552] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:30:56,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085417659] [2022-11-25 18:30:56,465 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:30:56,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:30:56,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:30:56,467 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:30:56,474 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:30:56,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:30:56,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:30:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:30:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:30:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:56,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:30:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:30:57,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085417659] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:30:57,050 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:30:57,050 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2022-11-25 18:30:57,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505801497] [2022-11-25 18:30:57,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:30:57,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:30:57,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:30:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:30:57,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:30:57,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:30:57,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 609 transitions, 16509 flow. Second operand has 22 states, 22 states have (on average 75.18181818181819) internal successors, (1654), 22 states have internal predecessors, (1654), 0 states have call successors, (0), 0 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 18:30:57,245 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:30:57,245 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:30:57,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:00,941 INFO L130 PetriNetUnfolder]: 2330/4773 cut-off events. [2022-11-25 18:31:00,941 INFO L131 PetriNetUnfolder]: For 454678/454678 co-relation queries the response was YES. [2022-11-25 18:31:00,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55741 conditions, 4773 events. 2330/4773 cut-off events. For 454678/454678 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 38045 event pairs, 117 based on Foata normal form. 70/4843 useless extension candidates. Maximal degree in co-relation 55663. Up to 1434 conditions per place. [2022-11-25 18:31:01,027 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 205 selfloop transitions, 550 changer transitions 29/784 dead transitions. [2022-11-25 18:31:01,027 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 784 transitions, 20568 flow [2022-11-25 18:31:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 18:31:01,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-11-25 18:31:01,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 2356 transitions. [2022-11-25 18:31:01,049 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4387337057728119 [2022-11-25 18:31:01,049 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 2356 transitions. [2022-11-25 18:31:01,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 2356 transitions. [2022-11-25 18:31:01,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:01,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 2356 transitions. [2022-11-25 18:31:01,065 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 78.53333333333333) internal successors, (2356), 30 states have internal predecessors, (2356), 0 states have call successors, (0), 0 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 18:31:01,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 179.0) internal successors, (5549), 31 states have internal predecessors, (5549), 0 states have call successors, (0), 0 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 18:31:01,076 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 179.0) internal successors, (5549), 31 states have internal predecessors, (5549), 0 states have call successors, (0), 0 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 18:31:01,076 INFO L175 Difference]: Start difference. First operand has 242 places, 609 transitions, 16509 flow. Second operand 30 states and 2356 transitions. [2022-11-25 18:31:01,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 784 transitions, 20568 flow [2022-11-25 18:31:02,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 784 transitions, 20263 flow, removed 127 selfloop flow, removed 8 redundant places. [2022-11-25 18:31:02,843 INFO L231 Difference]: Finished difference. Result has 268 places, 653 transitions, 18807 flow [2022-11-25 18:31:02,844 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=16208, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=504, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=18807, PETRI_PLACES=268, PETRI_TRANSITIONS=653} [2022-11-25 18:31:02,844 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 239 predicate places. [2022-11-25 18:31:02,844 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 653 transitions, 18807 flow [2022-11-25 18:31:02,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 75.18181818181819) internal successors, (1654), 22 states have internal predecessors, (1654), 0 states have call successors, (0), 0 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 18:31:02,845 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:02,845 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:02,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:03,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-11-25 18:31:03,045 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:31:03,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:03,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1996343462, now seen corresponding path program 15 times [2022-11-25 18:31:03,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:03,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292875490] [2022-11-25 18:31:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:03,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292875490] [2022-11-25 18:31:03,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292875490] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:03,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677271708] [2022-11-25 18:31:03,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:31:03,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:03,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:03,260 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:03,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 18:31:03,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:31:03,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:31:03,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:31:03,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:03,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:03,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:03,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677271708] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:03,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:31:03,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-25 18:31:03,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417357850] [2022-11-25 18:31:03,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:03,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:31:03,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:03,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:31:03,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:31:04,018 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:31:04,021 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 653 transitions, 18807 flow. Second operand has 21 states, 21 states have (on average 74.95238095238095) internal successors, (1574), 21 states have internal predecessors, (1574), 0 states have call successors, (0), 0 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 18:31:04,021 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:04,021 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:31:04,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:08,202 INFO L130 PetriNetUnfolder]: 2481/5025 cut-off events. [2022-11-25 18:31:08,203 INFO L131 PetriNetUnfolder]: For 506245/506245 co-relation queries the response was YES. [2022-11-25 18:31:08,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63076 conditions, 5025 events. 2481/5025 cut-off events. For 506245/506245 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 39831 event pairs, 72 based on Foata normal form. 48/5073 useless extension candidates. Maximal degree in co-relation 62993. Up to 1204 conditions per place. [2022-11-25 18:31:08,274 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 169 selfloop transitions, 635 changer transitions 33/837 dead transitions. [2022-11-25 18:31:08,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 837 transitions, 23762 flow [2022-11-25 18:31:08,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 18:31:08,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-25 18:31:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2737 transitions. [2022-11-25 18:31:08,281 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43687150837988825 [2022-11-25 18:31:08,281 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2737 transitions. [2022-11-25 18:31:08,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2737 transitions. [2022-11-25 18:31:08,282 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:08,283 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2737 transitions. [2022-11-25 18:31:08,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 78.2) internal successors, (2737), 35 states have internal predecessors, (2737), 0 states have call successors, (0), 0 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 18:31:08,296 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 179.0) internal successors, (6444), 36 states have internal predecessors, (6444), 0 states have call successors, (0), 0 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 18:31:08,298 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 179.0) internal successors, (6444), 36 states have internal predecessors, (6444), 0 states have call successors, (0), 0 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 18:31:08,298 INFO L175 Difference]: Start difference. First operand has 268 places, 653 transitions, 18807 flow. Second operand 35 states and 2737 transitions. [2022-11-25 18:31:08,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 837 transitions, 23762 flow [2022-11-25 18:31:10,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 837 transitions, 22431 flow, removed 148 selfloop flow, removed 19 redundant places. [2022-11-25 18:31:10,606 INFO L231 Difference]: Finished difference. Result has 286 places, 708 transitions, 20741 flow [2022-11-25 18:31:10,607 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=17050, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=20741, PETRI_PLACES=286, PETRI_TRANSITIONS=708} [2022-11-25 18:31:10,607 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 257 predicate places. [2022-11-25 18:31:10,608 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 708 transitions, 20741 flow [2022-11-25 18:31:10,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 74.95238095238095) internal successors, (1574), 21 states have internal predecessors, (1574), 0 states have call successors, (0), 0 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 18:31:10,608 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:10,608 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:10,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:10,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:10,809 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:31:10,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:10,810 INFO L85 PathProgramCache]: Analyzing trace with hash -435330680, now seen corresponding path program 16 times [2022-11-25 18:31:10,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:10,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353653960] [2022-11-25 18:31:10,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:10,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:11,074 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:11,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353653960] [2022-11-25 18:31:11,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353653960] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:11,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556024068] [2022-11-25 18:31:11,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:31:11,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:11,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:11,077 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:11,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 18:31:11,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:31:11,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:31:11,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:31:11,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:11,412 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:11,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:11,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556024068] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:11,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:31:11,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2022-11-25 18:31:11,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454752762] [2022-11-25 18:31:11,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:11,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-25 18:31:11,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-25 18:31:11,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2022-11-25 18:31:11,779 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:31:11,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 708 transitions, 20741 flow. Second operand has 21 states, 21 states have (on average 75.0) internal successors, (1575), 21 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 18:31:11,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:11,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:31:11,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:16,053 INFO L130 PetriNetUnfolder]: 2931/5830 cut-off events. [2022-11-25 18:31:16,053 INFO L131 PetriNetUnfolder]: For 610270/610270 co-relation queries the response was YES. [2022-11-25 18:31:16,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73287 conditions, 5830 events. 2931/5830 cut-off events. For 610270/610270 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 46798 event pairs, 333 based on Foata normal form. 56/5886 useless extension candidates. Maximal degree in co-relation 73201. Up to 4208 conditions per place. [2022-11-25 18:31:16,194 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 655 selfloop transitions, 331 changer transitions 12/998 dead transitions. [2022-11-25 18:31:16,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 998 transitions, 28743 flow [2022-11-25 18:31:16,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 18:31:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 18:31:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2198 transitions. [2022-11-25 18:31:16,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43854748603351956 [2022-11-25 18:31:16,201 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2198 transitions. [2022-11-25 18:31:16,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2198 transitions. [2022-11-25 18:31:16,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:16,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2198 transitions. [2022-11-25 18:31:16,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 78.5) internal successors, (2198), 28 states have internal predecessors, (2198), 0 states have call successors, (0), 0 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 18:31:16,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 179.0) internal successors, (5191), 29 states have internal predecessors, (5191), 0 states have call successors, (0), 0 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 18:31:16,218 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 179.0) internal successors, (5191), 29 states have internal predecessors, (5191), 0 states have call successors, (0), 0 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 18:31:16,218 INFO L175 Difference]: Start difference. First operand has 286 places, 708 transitions, 20741 flow. Second operand 28 states and 2198 transitions. [2022-11-25 18:31:16,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 998 transitions, 28743 flow [2022-11-25 18:31:20,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 998 transitions, 27485 flow, removed 575 selfloop flow, removed 9 redundant places. [2022-11-25 18:31:20,432 INFO L231 Difference]: Finished difference. Result has 311 places, 867 transitions, 25345 flow [2022-11-25 18:31:20,433 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=19788, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=25345, PETRI_PLACES=311, PETRI_TRANSITIONS=867} [2022-11-25 18:31:20,434 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 282 predicate places. [2022-11-25 18:31:20,434 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 867 transitions, 25345 flow [2022-11-25 18:31:20,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 75.0) internal successors, (1575), 21 states have internal predecessors, (1575), 0 states have call successors, (0), 0 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 18:31:20,435 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:20,435 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:20,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:20,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:20,642 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:31:20,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:20,642 INFO L85 PathProgramCache]: Analyzing trace with hash -993867212, now seen corresponding path program 17 times [2022-11-25 18:31:20,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:20,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249544098] [2022-11-25 18:31:20,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:20,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:20,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:20,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:20,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249544098] [2022-11-25 18:31:20,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249544098] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:20,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208910361] [2022-11-25 18:31:20,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 18:31:20,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:20,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:20,910 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:20,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 18:31:21,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-11-25 18:31:21,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:31:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:31:21,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:21,178 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:21,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:21,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208910361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:21,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:31:21,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2022-11-25 18:31:21,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098981799] [2022-11-25 18:31:21,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:21,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:31:21,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:21,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:31:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:31:21,594 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:31:21,596 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 867 transitions, 25345 flow. Second operand has 23 states, 23 states have (on average 74.91304347826087) internal successors, (1723), 23 states have internal predecessors, (1723), 0 states have call successors, (0), 0 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 18:31:21,596 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:21,596 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:31:21,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:27,767 INFO L130 PetriNetUnfolder]: 3392/6750 cut-off events. [2022-11-25 18:31:27,767 INFO L131 PetriNetUnfolder]: For 822409/822409 co-relation queries the response was YES. [2022-11-25 18:31:27,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85498 conditions, 6750 events. 3392/6750 cut-off events. For 822409/822409 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 55622 event pairs, 153 based on Foata normal form. 118/6868 useless extension candidates. Maximal degree in co-relation 85406. Up to 2370 conditions per place. [2022-11-25 18:31:27,935 INFO L137 encePairwiseOnDemand]: 171/179 looper letters, 322 selfloop transitions, 809 changer transitions 15/1146 dead transitions. [2022-11-25 18:31:27,935 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 1146 transitions, 33830 flow [2022-11-25 18:31:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-11-25 18:31:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-11-25 18:31:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 2432 transitions. [2022-11-25 18:31:27,940 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43827716705712744 [2022-11-25 18:31:27,941 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 2432 transitions. [2022-11-25 18:31:27,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 2432 transitions. [2022-11-25 18:31:27,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:27,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 2432 transitions. [2022-11-25 18:31:27,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 78.45161290322581) internal successors, (2432), 31 states have internal predecessors, (2432), 0 states have call successors, (0), 0 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 18:31:27,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 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 18:31:27,954 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 179.0) internal successors, (5728), 32 states have internal predecessors, (5728), 0 states have call successors, (0), 0 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 18:31:27,954 INFO L175 Difference]: Start difference. First operand has 311 places, 867 transitions, 25345 flow. Second operand 31 states and 2432 transitions. [2022-11-25 18:31:27,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 1146 transitions, 33830 flow [2022-11-25 18:31:32,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1146 transitions, 33565 flow, removed 110 selfloop flow, removed 7 redundant places. [2022-11-25 18:31:32,404 INFO L231 Difference]: Finished difference. Result has 343 places, 1023 transitions, 32422 flow [2022-11-25 18:31:32,405 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=25079, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=866, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=658, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=32422, PETRI_PLACES=343, PETRI_TRANSITIONS=1023} [2022-11-25 18:31:32,406 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 314 predicate places. [2022-11-25 18:31:32,406 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 1023 transitions, 32422 flow [2022-11-25 18:31:32,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 74.91304347826087) internal successors, (1723), 23 states have internal predecessors, (1723), 0 states have call successors, (0), 0 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 18:31:32,406 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:32,406 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:32,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:32,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-11-25 18:31:32,607 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:31:32,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1171080225, now seen corresponding path program 18 times [2022-11-25 18:31:32,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:32,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236494482] [2022-11-25 18:31:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:32,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:32,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:32,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236494482] [2022-11-25 18:31:32,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236494482] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:32,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215094898] [2022-11-25 18:31:32,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-25 18:31:32,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:32,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:32,883 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:32,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 18:31:33,011 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-11-25 18:31:33,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:31:33,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 18:31:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:33,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:33,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:33,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215094898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:33,666 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:31:33,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 26 [2022-11-25 18:31:33,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558767560] [2022-11-25 18:31:33,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:33,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:31:33,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:33,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:31:33,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:31:33,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:31:33,878 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 1023 transitions, 32422 flow. Second operand has 27 states, 27 states have (on average 74.51851851851852) internal successors, (2012), 27 states have internal predecessors, (2012), 0 states have call successors, (0), 0 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 18:31:33,878 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:33,878 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:31:33,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:40,348 INFO L130 PetriNetUnfolder]: 3706/7400 cut-off events. [2022-11-25 18:31:40,348 INFO L131 PetriNetUnfolder]: For 1147264/1147264 co-relation queries the response was YES. [2022-11-25 18:31:40,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100315 conditions, 7400 events. 3706/7400 cut-off events. For 1147264/1147264 co-relation queries the response was YES. Maximal size of possible extension queue 627. Compared 61879 event pairs, 483 based on Foata normal form. 168/7568 useless extension candidates. Maximal degree in co-relation 100214. Up to 6040 conditions per place. [2022-11-25 18:31:40,526 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 994 selfloop transitions, 198 changer transitions 18/1210 dead transitions. [2022-11-25 18:31:40,527 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1210 transitions, 39237 flow [2022-11-25 18:31:40,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-25 18:31:40,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2022-11-25 18:31:40,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1807 transitions. [2022-11-25 18:31:40,640 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4389118290017003 [2022-11-25 18:31:40,640 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1807 transitions. [2022-11-25 18:31:40,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1807 transitions. [2022-11-25 18:31:40,641 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:40,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1807 transitions. [2022-11-25 18:31:40,644 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 78.56521739130434) internal successors, (1807), 23 states have internal predecessors, (1807), 0 states have call successors, (0), 0 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 18:31:40,651 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 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 18:31:40,652 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 179.0) internal successors, (4296), 24 states have internal predecessors, (4296), 0 states have call successors, (0), 0 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 18:31:40,653 INFO L175 Difference]: Start difference. First operand has 343 places, 1023 transitions, 32422 flow. Second operand 23 states and 1807 transitions. [2022-11-25 18:31:40,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1210 transitions, 39237 flow [2022-11-25 18:31:46,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1210 transitions, 38687 flow, removed 228 selfloop flow, removed 14 redundant places. [2022-11-25 18:31:46,664 INFO L231 Difference]: Finished difference. Result has 358 places, 1111 transitions, 35704 flow [2022-11-25 18:31:46,665 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=31859, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=869, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=35704, PETRI_PLACES=358, PETRI_TRANSITIONS=1111} [2022-11-25 18:31:46,666 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 329 predicate places. [2022-11-25 18:31:46,666 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 1111 transitions, 35704 flow [2022-11-25 18:31:46,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.51851851851852) internal successors, (2012), 27 states have internal predecessors, (2012), 0 states have call successors, (0), 0 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 18:31:46,667 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:31:46,667 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:31:46,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 18:31:46,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-11-25 18:31:46,867 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:31:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:31:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1462963130, now seen corresponding path program 19 times [2022-11-25 18:31:46,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:31:46,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364050903] [2022-11-25 18:31:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:31:46,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:31:46,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:47,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:31:47,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364050903] [2022-11-25 18:31:47,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364050903] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:31:47,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834678971] [2022-11-25 18:31:47,074 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-25 18:31:47,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:31:47,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:31:47,079 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:31:47,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 18:31:47,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:31:47,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:31:47,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:31:47,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:47,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:31:47,578 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:31:47,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834678971] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:31:47,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:31:47,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 22 [2022-11-25 18:31:47,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10532222] [2022-11-25 18:31:47,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:31:47,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:31:47,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:31:47,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:31:47,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:31:47,742 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:31:47,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 1111 transitions, 35704 flow. Second operand has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 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 18:31:47,744 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:31:47,744 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:31:47,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:31:55,438 INFO L130 PetriNetUnfolder]: 4079/8185 cut-off events. [2022-11-25 18:31:55,438 INFO L131 PetriNetUnfolder]: For 1156016/1156016 co-relation queries the response was YES. [2022-11-25 18:31:55,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114647 conditions, 8185 events. 4079/8185 cut-off events. For 1156016/1156016 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 69944 event pairs, 85 based on Foata normal form. 18/8203 useless extension candidates. Maximal degree in co-relation 114540. Up to 2458 conditions per place. [2022-11-25 18:31:55,618 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 774 selfloop transitions, 568 changer transitions 0/1342 dead transitions. [2022-11-25 18:31:55,619 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1342 transitions, 44573 flow [2022-11-25 18:31:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-25 18:31:55,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-25 18:31:55,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 2556 transitions. [2022-11-25 18:31:55,622 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43270695784662266 [2022-11-25 18:31:55,622 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 2556 transitions. [2022-11-25 18:31:55,622 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 2556 transitions. [2022-11-25 18:31:55,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:31:55,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 2556 transitions. [2022-11-25 18:31:55,626 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 77.45454545454545) internal successors, (2556), 33 states have internal predecessors, (2556), 0 states have call successors, (0), 0 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 18:31:55,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 179.0) internal successors, (6086), 34 states have internal predecessors, (6086), 0 states have call successors, (0), 0 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 18:31:55,634 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 179.0) internal successors, (6086), 34 states have internal predecessors, (6086), 0 states have call successors, (0), 0 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 18:31:55,634 INFO L175 Difference]: Start difference. First operand has 358 places, 1111 transitions, 35704 flow. Second operand 33 states and 2556 transitions. [2022-11-25 18:31:55,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1342 transitions, 44573 flow [2022-11-25 18:32:02,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1342 transitions, 43488 flow, removed 514 selfloop flow, removed 10 redundant places. [2022-11-25 18:32:02,902 INFO L231 Difference]: Finished difference. Result has 388 places, 1250 transitions, 41648 flow [2022-11-25 18:32:02,904 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=35182, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=446, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=41648, PETRI_PLACES=388, PETRI_TRANSITIONS=1250} [2022-11-25 18:32:02,905 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 359 predicate places. [2022-11-25 18:32:02,905 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1250 transitions, 41648 flow [2022-11-25 18:32:02,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 74.9090909090909) internal successors, (1648), 22 states have internal predecessors, (1648), 0 states have call successors, (0), 0 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 18:32:02,906 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:02,906 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:02,919 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:03,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-25 18:32:03,113 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:32:03,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:03,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1755158306, now seen corresponding path program 20 times [2022-11-25 18:32:03,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:03,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2214162] [2022-11-25 18:32:03,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:03,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:03,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:03,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2214162] [2022-11-25 18:32:03,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2214162] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:03,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398255339] [2022-11-25 18:32:03,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:32:03,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:03,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:03,418 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:03,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 18:32:03,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:32:03,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:32:03,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 18:32:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:03,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:04,013 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398255339] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:04,013 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:32:04,013 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2022-11-25 18:32:04,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109975683] [2022-11-25 18:32:04,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:04,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-25 18:32:04,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-25 18:32:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-11-25 18:32:04,148 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:32:04,150 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1250 transitions, 41648 flow. Second operand has 24 states, 24 states have (on average 75.04166666666667) internal successors, (1801), 24 states have internal predecessors, (1801), 0 states have call successors, (0), 0 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 18:32:04,151 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:04,151 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:32:04,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:12,883 INFO L130 PetriNetUnfolder]: 4274/8559 cut-off events. [2022-11-25 18:32:12,883 INFO L131 PetriNetUnfolder]: For 1378305/1378305 co-relation queries the response was YES. [2022-11-25 18:32:13,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122279 conditions, 8559 events. 4274/8559 cut-off events. For 1378305/1378305 co-relation queries the response was YES. Maximal size of possible extension queue 700. Compared 73581 event pairs, 521 based on Foata normal form. 56/8615 useless extension candidates. Maximal degree in co-relation 122164. Up to 7037 conditions per place. [2022-11-25 18:32:13,054 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 1137 selfloop transitions, 259 changer transitions 35/1431 dead transitions. [2022-11-25 18:32:13,054 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1431 transitions, 48338 flow [2022-11-25 18:32:13,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-25 18:32:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-11-25 18:32:13,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2198 transitions. [2022-11-25 18:32:13,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43854748603351956 [2022-11-25 18:32:13,058 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2198 transitions. [2022-11-25 18:32:13,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2198 transitions. [2022-11-25 18:32:13,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:13,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2198 transitions. [2022-11-25 18:32:13,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 78.5) internal successors, (2198), 28 states have internal predecessors, (2198), 0 states have call successors, (0), 0 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 18:32:13,064 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 179.0) internal successors, (5191), 29 states have internal predecessors, (5191), 0 states have call successors, (0), 0 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 18:32:13,066 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 179.0) internal successors, (5191), 29 states have internal predecessors, (5191), 0 states have call successors, (0), 0 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 18:32:13,066 INFO L175 Difference]: Start difference. First operand has 388 places, 1250 transitions, 41648 flow. Second operand 28 states and 2198 transitions. [2022-11-25 18:32:13,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1431 transitions, 48338 flow [2022-11-25 18:32:22,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1431 transitions, 46713 flow, removed 750 selfloop flow, removed 12 redundant places. [2022-11-25 18:32:23,032 INFO L231 Difference]: Finished difference. Result has 410 places, 1301 transitions, 43043 flow [2022-11-25 18:32:23,033 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=40569, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1025, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=43043, PETRI_PLACES=410, PETRI_TRANSITIONS=1301} [2022-11-25 18:32:23,034 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 381 predicate places. [2022-11-25 18:32:23,034 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 1301 transitions, 43043 flow [2022-11-25 18:32:23,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 75.04166666666667) internal successors, (1801), 24 states have internal predecessors, (1801), 0 states have call successors, (0), 0 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 18:32:23,035 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:23,035 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:23,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:23,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-11-25 18:32:23,242 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:32:23,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:23,242 INFO L85 PathProgramCache]: Analyzing trace with hash -245861395, now seen corresponding path program 21 times [2022-11-25 18:32:23,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:23,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306859216] [2022-11-25 18:32:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:23,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:23,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306859216] [2022-11-25 18:32:23,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306859216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:23,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113316028] [2022-11-25 18:32:23,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:32:23,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:23,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:23,474 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:23,477 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 18:32:23,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:32:23,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:32:23,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:32:23,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:23,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:23,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113316028] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:23,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:32:23,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 15 [2022-11-25 18:32:23,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870792336] [2022-11-25 18:32:23,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:23,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:32:23,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:23,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:32:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:32:23,961 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:32:23,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 1301 transitions, 43043 flow. Second operand has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 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 18:32:23,963 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:23,963 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:32:23,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:33,695 INFO L130 PetriNetUnfolder]: 4409/8857 cut-off events. [2022-11-25 18:32:33,695 INFO L131 PetriNetUnfolder]: For 1449753/1449753 co-relation queries the response was YES. [2022-11-25 18:32:33,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125310 conditions, 8857 events. 4409/8857 cut-off events. For 1449753/1449753 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 76801 event pairs, 543 based on Foata normal form. 60/8917 useless extension candidates. Maximal degree in co-relation 125188. Up to 6230 conditions per place. [2022-11-25 18:32:33,893 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 1078 selfloop transitions, 390 changer transitions 80/1548 dead transitions. [2022-11-25 18:32:33,893 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1548 transitions, 51289 flow [2022-11-25 18:32:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-11-25 18:32:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-11-25 18:32:33,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2071 transitions. [2022-11-25 18:32:33,896 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.44499355393210144 [2022-11-25 18:32:33,897 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2071 transitions. [2022-11-25 18:32:33,897 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2071 transitions. [2022-11-25 18:32:33,898 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:33,898 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2071 transitions. [2022-11-25 18:32:33,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 79.65384615384616) internal successors, (2071), 26 states have internal predecessors, (2071), 0 states have call successors, (0), 0 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 18:32:33,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 179.0) internal successors, (4833), 27 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 18:32:33,907 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 179.0) internal successors, (4833), 27 states have internal predecessors, (4833), 0 states have call successors, (0), 0 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 18:32:33,908 INFO L175 Difference]: Start difference. First operand has 410 places, 1301 transitions, 43043 flow. Second operand 26 states and 2071 transitions. [2022-11-25 18:32:33,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1548 transitions, 51289 flow [2022-11-25 18:32:43,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1548 transitions, 50977 flow, removed 105 selfloop flow, removed 13 redundant places. [2022-11-25 18:32:43,731 INFO L231 Difference]: Finished difference. Result has 431 places, 1365 transitions, 46346 flow [2022-11-25 18:32:43,731 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=179, PETRI_DIFFERENCE_MINUEND_FLOW=42745, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=328, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=951, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=46346, PETRI_PLACES=431, PETRI_TRANSITIONS=1365} [2022-11-25 18:32:43,732 INFO L288 CegarLoopForPetriNet]: 29 programPoint places, 402 predicate places. [2022-11-25 18:32:43,733 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1365 transitions, 46346 flow [2022-11-25 18:32:43,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 75.625) internal successors, (1210), 16 states have internal predecessors, (1210), 0 states have call successors, (0), 0 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 18:32:43,733 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:32:43,733 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:43,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:43,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-11-25 18:32:43,937 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2022-11-25 18:32:43,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:43,937 INFO L85 PathProgramCache]: Analyzing trace with hash -51504788, now seen corresponding path program 22 times [2022-11-25 18:32:43,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:43,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641037323] [2022-11-25 18:32:43,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:43,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:32:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:44,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:44,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641037323] [2022-11-25 18:32:44,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641037323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:32:44,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669741320] [2022-11-25 18:32:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:32:44,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:44,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:44,298 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:44,327 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7785241-9997-4f12-9c27-39766efc4d64/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 18:32:44,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:32:44,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:32:44,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 18:32:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:44,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:32:44,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669741320] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:44,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:32:44,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-11-25 18:32:44,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992475540] [2022-11-25 18:32:44,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:44,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-25 18:32:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:44,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-25 18:32:44,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=519, Unknown=0, NotChecked=0, Total=650 [2022-11-25 18:32:45,187 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 73 out of 179 [2022-11-25 18:32:45,189 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1365 transitions, 46346 flow. Second operand has 26 states, 26 states have (on average 74.8076923076923) internal successors, (1945), 26 states have internal predecessors, (1945), 0 states have call successors, (0), 0 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 18:32:45,189 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:32:45,189 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 73 of 179 [2022-11-25 18:32:45,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:32:57,608 INFO L130 PetriNetUnfolder]: 5165/10327 cut-off events. [2022-11-25 18:32:57,608 INFO L131 PetriNetUnfolder]: For 2103574/2103574 co-relation queries the response was YES. [2022-11-25 18:32:57,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149865 conditions, 10327 events. 5165/10327 cut-off events. For 2103574/2103574 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 92211 event pairs, 115 based on Foata normal form. 204/10531 useless extension candidates. Maximal degree in co-relation 149734. Up to 4344 conditions per place. [2022-11-25 18:32:57,910 INFO L137 encePairwiseOnDemand]: 172/179 looper letters, 1082 selfloop transitions, 795 changer transitions 20/1897 dead transitions. [2022-11-25 18:32:57,910 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 1897 transitions, 63366 flow [2022-11-25 18:32:57,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-11-25 18:32:57,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2022-11-25 18:32:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 3701 transitions. [2022-11-25 18:32:57,920 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.43991441816236776 [2022-11-25 18:32:57,920 INFO L72 ComplementDD]: Start complementDD. Operand 47 states and 3701 transitions. [2022-11-25 18:32:57,920 INFO L73 IsDeterministic]: Start isDeterministic. Operand 47 states and 3701 transitions. [2022-11-25 18:32:57,923 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:32:57,923 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 47 states and 3701 transitions. [2022-11-25 18:32:57,932 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 48 states, 47 states have (on average 78.74468085106383) internal successors, (3701), 47 states have internal predecessors, (3701), 0 states have call successors, (0), 0 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 18:32:57,943 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 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 18:32:57,945 INFO L81 ComplementDD]: Finished complementDD. Result has 48 states, 48 states have (on average 179.0) internal successors, (8592), 48 states have internal predecessors, (8592), 0 states have call successors, (0), 0 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 18:32:57,946 INFO L175 Difference]: Start difference. First operand has 431 places, 1365 transitions, 46346 flow. Second operand 47 states and 3701 transitions. [2022-11-25 18:32:57,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 1897 transitions, 63366 flow