./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/stack_longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- 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 18:06:56,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:06:56,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:06:56,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:06:56,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:06:56,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:06:56,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:06:56,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:06:56,225 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:06:56,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:06:56,228 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:06:56,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:06:56,229 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:06:56,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:06:56,232 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:06:56,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:06:56,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:06:56,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:06:56,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:06:56,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:06:56,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:06:56,241 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:06:56,242 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:06:56,243 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:06:56,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:06:56,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:06:56,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:06:56,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:06:56,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:06:56,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:06:56,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:06:56,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:06:56,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:06:56,253 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:06:56,254 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:06:56,255 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:06:56,256 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:06:56,256 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:06:56,256 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:06:56,257 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:06:56,258 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:06:56,259 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2022-11-25 18:06:56,281 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:06:56,282 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:06:56,282 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:06:56,282 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:06:56,283 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:06:56,283 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:06:56,284 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:06:56,284 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:06:56,285 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:06:56,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:06:56,285 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:06:56,286 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:06:56,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:06:56,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:06:56,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:06:56,287 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:06:56,287 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:06:56,287 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:06:56,287 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:06:56,288 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:06:56,288 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:06:56,288 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:06:56,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:06:56,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:06:56,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:06:56,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:06:56,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:06:56,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:06:56,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:06:56,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:06:56,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:06:56,291 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:06:56,291 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:06:56,291 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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-11-25 18:06:56,579 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:06:56,615 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:06:56,618 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:06:56,619 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:06:56,620 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:06:56,621 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-25 18:06:59,634 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:06:59,995 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:06:59,997 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-25 18:07:00,015 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data/28ca80cd0/ebabbdc910a54389b7455b39ec02c522/FLAG0b5c09362 [2022-11-25 18:07:00,037 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data/28ca80cd0/ebabbdc910a54389b7455b39ec02c522 [2022-11-25 18:07:00,043 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:07:00,045 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:07:00,050 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:07:00,050 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:07:00,054 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:07:00,055 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,056 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7609ba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00, skipping insertion in model container [2022-11-25 18:07:00,057 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,065 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:07:00,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:07:00,614 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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-25 18:07:00,663 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:07:00,677 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:07:00,736 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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-25 18:07:00,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:07:00,859 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:07:00,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00 WrapperNode [2022-11-25 18:07:00,860 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:07:00,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:07:00,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:07:00,862 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:07:00,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,901 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,950 INFO L138 Inliner]: procedures = 277, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 155 [2022-11-25 18:07:00,951 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:07:00,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:07:00,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:07:00,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:07:00,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:00,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:01,010 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:01,012 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:01,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:01,017 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:07:01,018 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:07:01,018 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:07:01,018 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:07:01,019 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (1/1) ... [2022-11-25 18:07:01,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:07:01,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:01,069 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:07:01,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:07:01,128 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 18:07:01,129 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 18:07:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 18:07:01,129 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 18:07:01,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:07:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:07:01,131 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:07:01,133 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:07:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:07:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:07:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:07:01,134 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:07:01,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:07:01,136 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 18:07:01,349 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:07:01,351 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:07:01,695 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:07:01,704 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:07:01,708 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:07:01,711 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:01 BoogieIcfgContainer [2022-11-25 18:07:01,711 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:07:01,713 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:07:01,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:07:01,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:07:01,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:07:00" (1/3) ... [2022-11-25 18:07:01,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2168ba47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:01, skipping insertion in model container [2022-11-25 18:07:01,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:00" (2/3) ... [2022-11-25 18:07:01,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2168ba47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:01, skipping insertion in model container [2022-11-25 18:07:01,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:01" (3/3) ... [2022-11-25 18:07:01,721 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-11-25 18:07:01,742 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:07:01,742 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-25 18:07:01,742 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:07:01,846 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:07:01,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 195 transitions, 406 flow [2022-11-25 18:07:02,056 INFO L130 PetriNetUnfolder]: 10/193 cut-off events. [2022-11-25 18:07:02,057 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:07:02,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 202 conditions, 193 events. 10/193 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 510 event pairs, 0 based on Foata normal form. 0/168 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-11-25 18:07:02,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 195 transitions, 406 flow [2022-11-25 18:07:02,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 185 places, 188 transitions, 388 flow [2022-11-25 18:07:02,086 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:07:02,114 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 185 places, 188 transitions, 388 flow [2022-11-25 18:07:02,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 185 places, 188 transitions, 388 flow [2022-11-25 18:07:02,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 185 places, 188 transitions, 388 flow [2022-11-25 18:07:02,164 INFO L130 PetriNetUnfolder]: 10/188 cut-off events. [2022-11-25 18:07:02,165 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:07:02,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197 conditions, 188 events. 10/188 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 484 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 143. Up to 3 conditions per place. [2022-11-25 18:07:02,173 INFO L119 LiptonReduction]: Number of co-enabled transitions 11140 [2022-11-25 18:07:09,549 INFO L134 LiptonReduction]: Checked pairs total: 16603 [2022-11-25 18:07:09,549 INFO L136 LiptonReduction]: Total number of compositions: 196 [2022-11-25 18:07:09,584 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:07:09,597 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;@453dc72b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:07:09,598 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-25 18:07:09,604 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:07:09,605 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:07:09,605 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:09,606 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:07:09,609 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:09,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:09,618 INFO L85 PathProgramCache]: Analyzing trace with hash 798, now seen corresponding path program 1 times [2022-11-25 18:07:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:09,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057609942] [2022-11-25 18:07:09,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:09,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:09,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:09,746 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 18:07:09,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:09,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057609942] [2022-11-25 18:07:09,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057609942] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:09,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:09,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:07:09,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820077180] [2022-11-25 18:07:09,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:09,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:07:09,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:09,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:07:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:07:09,796 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 184 out of 391 [2022-11-25 18:07:09,801 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 47 transitions, 106 flow. Second operand has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:09,802 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:09,802 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 184 of 391 [2022-11-25 18:07:09,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:10,118 INFO L130 PetriNetUnfolder]: 1456/2239 cut-off events. [2022-11-25 18:07:10,118 INFO L131 PetriNetUnfolder]: For 47/47 co-relation queries the response was YES. [2022-11-25 18:07:10,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 2239 events. 1456/2239 cut-off events. For 47/47 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10387 event pairs, 1176 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 4272. Up to 2240 conditions per place. [2022-11-25 18:07:10,137 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 44 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-11-25 18:07:10,137 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 188 flow [2022-11-25 18:07:10,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:07:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:07:10,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 415 transitions. [2022-11-25 18:07:10,153 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.530690537084399 [2022-11-25 18:07:10,154 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 415 transitions. [2022-11-25 18:07:10,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 415 transitions. [2022-11-25 18:07:10,157 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:10,159 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 415 transitions. [2022-11-25 18:07:10,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 207.5) internal successors, (415), 2 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,170 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 391.0) internal successors, (1173), 3 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,171 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 391.0) internal successors, (1173), 3 states have internal predecessors, (1173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,173 INFO L175 Difference]: Start difference. First operand has 48 places, 47 transitions, 106 flow. Second operand 2 states and 415 transitions. [2022-11-25 18:07:10,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 188 flow [2022-11-25 18:07:10,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:07:10,180 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2022-11-25 18:07:10,182 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-11-25 18:07:10,185 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 18:07:10,186 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2022-11-25 18:07:10,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 184.5) internal successors, (369), 2 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,186 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:10,187 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:07:10,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:07:10,187 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:10,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:10,188 INFO L85 PathProgramCache]: Analyzing trace with hash 784262, now seen corresponding path program 1 times [2022-11-25 18:07:10,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:10,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831671938] [2022-11-25 18:07:10,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:10,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:10,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:10,396 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 18:07:10,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:10,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831671938] [2022-11-25 18:07:10,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831671938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:10,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:10,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:07:10,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484621455] [2022-11-25 18:07:10,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:10,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:10,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:10,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:10,458 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 391 [2022-11-25 18:07:10,459 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:10,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 391 [2022-11-25 18:07:10,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:10,728 INFO L130 PetriNetUnfolder]: 1427/2184 cut-off events. [2022-11-25 18:07:10,728 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 18:07:10,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 2184 events. 1427/2184 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10046 event pairs, 1152 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 4382. Up to 2183 conditions per place. [2022-11-25 18:07:10,742 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-25 18:07:10,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 172 flow [2022-11-25 18:07:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:10,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:10,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 569 transitions. [2022-11-25 18:07:10,749 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48508098891730606 [2022-11-25 18:07:10,749 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 569 transitions. [2022-11-25 18:07:10,749 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 569 transitions. [2022-11-25 18:07:10,750 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:10,750 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 569 transitions. [2022-11-25 18:07:10,752 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,757 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,759 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,759 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 569 transitions. [2022-11-25 18:07:10,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 172 flow [2022-11-25 18:07:10,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:07:10,761 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2022-11-25 18:07:10,761 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-11-25 18:07:10,762 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 18:07:10,763 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2022-11-25 18:07:10,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:10,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:10,764 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:07:10,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:07:10,764 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:10,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:10,768 INFO L85 PathProgramCache]: Analyzing trace with hash 784260, now seen corresponding path program 1 times [2022-11-25 18:07:10,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:10,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189285398] [2022-11-25 18:07:10,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:10,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:10,973 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 18:07:10,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:10,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189285398] [2022-11-25 18:07:10,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189285398] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:10,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:10,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:07:10,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666315253] [2022-11-25 18:07:10,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:10,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:10,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:10,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:10,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:11,036 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 391 [2022-11-25 18:07:11,037 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,037 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:11,038 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 391 [2022-11-25 18:07:11,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:11,296 INFO L130 PetriNetUnfolder]: 1398/2129 cut-off events. [2022-11-25 18:07:11,296 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 18:07:11,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 2129 events. 1398/2129 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 9679 event pairs, 1128 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 4274. Up to 2128 conditions per place. [2022-11-25 18:07:11,312 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-11-25 18:07:11,312 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2022-11-25 18:07:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:11,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 579 transitions. [2022-11-25 18:07:11,315 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4936061381074169 [2022-11-25 18:07:11,315 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 579 transitions. [2022-11-25 18:07:11,315 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 579 transitions. [2022-11-25 18:07:11,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:11,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 579 transitions. [2022-11-25 18:07:11,317 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 193.0) internal successors, (579), 3 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,320 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,321 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,321 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 579 transitions. [2022-11-25 18:07:11,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2022-11-25 18:07:11,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:11,324 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-11-25 18:07:11,324 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-11-25 18:07:11,326 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-11-25 18:07:11,326 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-11-25 18:07:11,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,327 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:11,327 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:07:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-25 18:07:11,327 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:11,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 753693187, now seen corresponding path program 1 times [2022-11-25 18:07:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:11,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252937452] [2022-11-25 18:07:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:11,509 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 18:07:11,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:11,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252937452] [2022-11-25 18:07:11,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252937452] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:11,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:11,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:07:11,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052878893] [2022-11-25 18:07:11,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:11,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:07:11,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:11,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:07:11,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:07:11,603 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 391 [2022-11-25 18:07:11,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:11,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 391 [2022-11-25 18:07:11,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:11,791 INFO L130 PetriNetUnfolder]: 1021/1583 cut-off events. [2022-11-25 18:07:11,791 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 18:07:11,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3186 conditions, 1583 events. 1021/1583 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6929 event pairs, 816 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 3182. Up to 1582 conditions per place. [2022-11-25 18:07:11,801 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-11-25 18:07:11,801 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2022-11-25 18:07:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:11,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2022-11-25 18:07:11,804 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47144075021312876 [2022-11-25 18:07:11,804 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2022-11-25 18:07:11,804 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2022-11-25 18:07:11,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:11,805 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2022-11-25 18:07:11,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,810 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,810 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 553 transitions. [2022-11-25 18:07:11,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2022-11-25 18:07:11,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:11,812 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-11-25 18:07:11,812 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-11-25 18:07:11,813 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-11-25 18:07:11,813 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-11-25 18:07:11,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 172.25) internal successors, (689), 4 states have internal predecessors, (689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,814 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:11,814 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:07:11,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-25 18:07:11,815 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash 753693188, now seen corresponding path program 1 times [2022-11-25 18:07:11,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:11,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567987569] [2022-11-25 18:07:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:11,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:11,857 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 18:07:11,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:11,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567987569] [2022-11-25 18:07:11,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567987569] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:11,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:11,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:07:11,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191209054] [2022-11-25 18:07:11,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:11,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:11,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:11,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:11,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:11,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 391 [2022-11-25 18:07:11,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:11,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:11,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 391 [2022-11-25 18:07:11,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:12,100 INFO L130 PetriNetUnfolder]: 644/1037 cut-off events. [2022-11-25 18:07:12,100 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 18:07:12,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1037 events. 644/1037 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4342 event pairs, 504 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 2090. Up to 1036 conditions per place. [2022-11-25 18:07:12,107 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 36 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-25 18:07:12,107 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 160 flow [2022-11-25 18:07:12,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:12,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-11-25 18:07:12,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4833759590792839 [2022-11-25 18:07:12,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-11-25 18:07:12,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-11-25 18:07:12,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:12,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-11-25 18:07:12,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,116 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,116 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 567 transitions. [2022-11-25 18:07:12,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 160 flow [2022-11-25 18:07:12,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:12,118 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2022-11-25 18:07:12,118 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-11-25 18:07:12,119 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2022-11-25 18:07:12,119 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2022-11-25 18:07:12,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.66666666666666) internal successors, (533), 3 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,120 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:12,120 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:07:12,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-25 18:07:12,121 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:12,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:12,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1888527610, now seen corresponding path program 1 times [2022-11-25 18:07:12,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:12,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304609750] [2022-11-25 18:07:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:12,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:12,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:12,330 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 18:07:12,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:12,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304609750] [2022-11-25 18:07:12,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304609750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:12,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:12,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:07:12,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725892244] [2022-11-25 18:07:12,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:12,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:07:12,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:12,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:07:12,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:07:12,457 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 391 [2022-11-25 18:07:12,458 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,458 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:12,458 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 391 [2022-11-25 18:07:12,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:12,714 INFO L130 PetriNetUnfolder]: 720/1168 cut-off events. [2022-11-25 18:07:12,714 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-11-25 18:07:12,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 1168 events. 720/1168 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5467 event pairs, 114 based on Foata normal form. 0/836 useless extension candidates. Maximal degree in co-relation 2354. Up to 916 conditions per place. [2022-11-25 18:07:12,721 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 57 selfloop transitions, 4 changer transitions 0/61 dead transitions. [2022-11-25 18:07:12,721 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 61 transitions, 257 flow [2022-11-25 18:07:12,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:07:12,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:07:12,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 770 transitions. [2022-11-25 18:07:12,724 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49232736572890023 [2022-11-25 18:07:12,724 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 770 transitions. [2022-11-25 18:07:12,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 770 transitions. [2022-11-25 18:07:12,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:12,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 770 transitions. [2022-11-25 18:07:12,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 192.5) internal successors, (770), 4 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,731 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,731 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 4 states and 770 transitions. [2022-11-25 18:07:12,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 61 transitions, 257 flow [2022-11-25 18:07:12,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 61 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:12,733 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 95 flow [2022-11-25 18:07:12,734 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-11-25 18:07:12,734 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-11-25 18:07:12,735 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 95 flow [2022-11-25 18:07:12,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 178.5) internal successors, (714), 4 states have internal predecessors, (714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:12,735 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:12,736 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:07:12,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-25 18:07:12,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:12,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:12,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1888527611, now seen corresponding path program 1 times [2022-11-25 18:07:12,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:12,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508511507] [2022-11-25 18:07:12,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:12,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:12,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:12,962 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 18:07:12,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508511507] [2022-11-25 18:07:12,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508511507] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:12,963 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:12,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:07:12,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297235500] [2022-11-25 18:07:12,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:12,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:07:12,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:12,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:07:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:07:13,066 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 391 [2022-11-25 18:07:13,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 95 flow. Second operand has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:13,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 391 [2022-11-25 18:07:13,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:13,354 INFO L130 PetriNetUnfolder]: 770/1251 cut-off events. [2022-11-25 18:07:13,354 INFO L131 PetriNetUnfolder]: For 38/38 co-relation queries the response was YES. [2022-11-25 18:07:13,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1251 events. 770/1251 cut-off events. For 38/38 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4925 event pairs, 192 based on Foata normal form. 0/969 useless extension candidates. Maximal degree in co-relation 2586. Up to 906 conditions per place. [2022-11-25 18:07:13,361 INFO L137 encePairwiseOnDemand]: 385/391 looper letters, 67 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2022-11-25 18:07:13,361 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 70 transitions, 301 flow [2022-11-25 18:07:13,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:07:13,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:07:13,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 786 transitions. [2022-11-25 18:07:13,364 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5025575447570333 [2022-11-25 18:07:13,364 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 786 transitions. [2022-11-25 18:07:13,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 786 transitions. [2022-11-25 18:07:13,365 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:13,365 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 786 transitions. [2022-11-25 18:07:13,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 196.5) internal successors, (786), 4 states have internal predecessors, (786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,370 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 391.0) internal successors, (1955), 5 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,370 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 95 flow. Second operand 4 states and 786 transitions. [2022-11-25 18:07:13,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 70 transitions, 301 flow [2022-11-25 18:07:13,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 70 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:13,372 INFO L231 Difference]: Finished difference. Result has 44 places, 40 transitions, 114 flow [2022-11-25 18:07:13,373 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=44, PETRI_TRANSITIONS=40} [2022-11-25 18:07:13,373 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -4 predicate places. [2022-11-25 18:07:13,373 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 40 transitions, 114 flow [2022-11-25 18:07:13,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 179.5) internal successors, (718), 4 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,374 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:13,374 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:13,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-25 18:07:13,374 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:13,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:13,375 INFO L85 PathProgramCache]: Analyzing trace with hash -814829986, now seen corresponding path program 1 times [2022-11-25 18:07:13,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:13,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069607156] [2022-11-25 18:07:13,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:13,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:13,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:13,428 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 18:07:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:13,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069607156] [2022-11-25 18:07:13,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069607156] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:13,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:13,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:07:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823558192] [2022-11-25 18:07:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:13,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:13,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:13,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:13,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:13,436 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 391 [2022-11-25 18:07:13,436 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 114 flow. Second operand has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,436 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:13,437 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 391 [2022-11-25 18:07:13,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:13,616 INFO L130 PetriNetUnfolder]: 734/1203 cut-off events. [2022-11-25 18:07:13,616 INFO L131 PetriNetUnfolder]: For 204/204 co-relation queries the response was YES. [2022-11-25 18:07:13,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2670 conditions, 1203 events. 734/1203 cut-off events. For 204/204 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4695 event pairs, 323 based on Foata normal form. 26/1025 useless extension candidates. Maximal degree in co-relation 2663. Up to 902 conditions per place. [2022-11-25 18:07:13,623 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 56 selfloop transitions, 2 changer transitions 0/58 dead transitions. [2022-11-25 18:07:13,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 58 transitions, 269 flow [2022-11-25 18:07:13,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:13,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:13,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 603 transitions. [2022-11-25 18:07:13,626 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5140664961636828 [2022-11-25 18:07:13,626 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 603 transitions. [2022-11-25 18:07:13,626 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 603 transitions. [2022-11-25 18:07:13,627 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:13,627 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 603 transitions. [2022-11-25 18:07:13,628 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,631 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,631 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 114 flow. Second operand 3 states and 603 transitions. [2022-11-25 18:07:13,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 58 transitions, 269 flow [2022-11-25 18:07:13,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 265 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:13,634 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 124 flow [2022-11-25 18:07:13,634 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2022-11-25 18:07:13,635 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2022-11-25 18:07:13,635 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 124 flow [2022-11-25 18:07:13,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.66666666666666) internal successors, (551), 3 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,635 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:13,636 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:13,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-25 18:07:13,636 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:13,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:13,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1154360342, now seen corresponding path program 1 times [2022-11-25 18:07:13,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:13,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162769910] [2022-11-25 18:07:13,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:13,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:13,711 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 18:07:13,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:13,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162769910] [2022-11-25 18:07:13,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162769910] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:13,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:13,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:07:13,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090052516] [2022-11-25 18:07:13,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:13,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:13,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:13,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:13,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:13,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 391 [2022-11-25 18:07:13,722 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,722 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:13,722 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 391 [2022-11-25 18:07:13,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:13,916 INFO L130 PetriNetUnfolder]: 762/1247 cut-off events. [2022-11-25 18:07:13,917 INFO L131 PetriNetUnfolder]: For 271/271 co-relation queries the response was YES. [2022-11-25 18:07:13,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2883 conditions, 1247 events. 762/1247 cut-off events. For 271/271 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4985 event pairs, 554 based on Foata normal form. 40/1117 useless extension candidates. Maximal degree in co-relation 2875. Up to 1146 conditions per place. [2022-11-25 18:07:13,925 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 56 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2022-11-25 18:07:13,926 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 60 transitions, 293 flow [2022-11-25 18:07:13,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:13,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:13,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2022-11-25 18:07:13,928 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5089514066496164 [2022-11-25 18:07:13,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2022-11-25 18:07:13,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2022-11-25 18:07:13,929 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:13,929 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2022-11-25 18:07:13,931 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,934 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,934 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 124 flow. Second operand 3 states and 597 transitions. [2022-11-25 18:07:13,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 60 transitions, 293 flow [2022-11-25 18:07:13,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 60 transitions, 285 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:13,938 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 138 flow [2022-11-25 18:07:13,938 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2022-11-25 18:07:13,939 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-11-25 18:07:13,939 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 138 flow [2022-11-25 18:07:13,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,939 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:13,939 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:13,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-25 18:07:13,940 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:13,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:13,940 INFO L85 PathProgramCache]: Analyzing trace with hash -956583786, now seen corresponding path program 1 times [2022-11-25 18:07:13,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:13,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169134633] [2022-11-25 18:07:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:13,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:13,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:13,982 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 18:07:13,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:13,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169134633] [2022-11-25 18:07:13,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169134633] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:13,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:13,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:07:13,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382658037] [2022-11-25 18:07:13,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:13,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:13,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:13,993 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 391 [2022-11-25 18:07:13,994 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:13,994 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:13,995 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 391 [2022-11-25 18:07:13,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:14,248 INFO L130 PetriNetUnfolder]: 780/1269 cut-off events. [2022-11-25 18:07:14,248 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2022-11-25 18:07:14,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3058 conditions, 1269 events. 780/1269 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5488 event pairs, 288 based on Foata normal form. 12/1109 useless extension candidates. Maximal degree in co-relation 3050. Up to 1010 conditions per place. [2022-11-25 18:07:14,258 INFO L137 encePairwiseOnDemand]: 388/391 looper letters, 62 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2022-11-25 18:07:14,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 315 flow [2022-11-25 18:07:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 604 transitions. [2022-11-25 18:07:14,261 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.514919011082694 [2022-11-25 18:07:14,261 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 604 transitions. [2022-11-25 18:07:14,262 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 604 transitions. [2022-11-25 18:07:14,262 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:14,262 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 604 transitions. [2022-11-25 18:07:14,264 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.33333333333334) internal successors, (604), 3 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,268 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,268 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 138 flow. Second operand 3 states and 604 transitions. [2022-11-25 18:07:14,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 315 flow [2022-11-25 18:07:14,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 309 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:14,272 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 140 flow [2022-11-25 18:07:14,272 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-11-25 18:07:14,273 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2022-11-25 18:07:14,273 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 140 flow [2022-11-25 18:07:14,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:14,274 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:14,274 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:14,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-25 18:07:14,274 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:14,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:14,275 INFO L85 PathProgramCache]: Analyzing trace with hash -693572241, now seen corresponding path program 1 times [2022-11-25 18:07:14,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:14,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14161735] [2022-11-25 18:07:14,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:14,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:14,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14161735] [2022-11-25 18:07:14,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14161735] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:07:14,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288405729] [2022-11-25 18:07:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:14,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:14,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:14,655 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:07:14,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:07:14,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:14,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 18:07:14,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:14,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:14,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:14,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:07:14,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-25 18:07:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:15,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:15,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288405729] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:07:15,383 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:07:15,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 14 [2022-11-25 18:07:15,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956950418] [2022-11-25 18:07:15,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:07:15,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:07:15,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:15,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:07:15,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-11-25 18:07:16,858 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 391 [2022-11-25 18:07:16,861 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 140 flow. Second operand has 16 states, 16 states have (on average 173.625) internal successors, (2778), 16 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:16,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:16,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 391 [2022-11-25 18:07:16,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:18,174 INFO L130 PetriNetUnfolder]: 1760/2863 cut-off events. [2022-11-25 18:07:18,175 INFO L131 PetriNetUnfolder]: For 790/790 co-relation queries the response was YES. [2022-11-25 18:07:18,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7029 conditions, 2863 events. 1760/2863 cut-off events. For 790/790 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 13223 event pairs, 185 based on Foata normal form. 78/2557 useless extension candidates. Maximal degree in co-relation 7020. Up to 1105 conditions per place. [2022-11-25 18:07:18,201 INFO L137 encePairwiseOnDemand]: 383/391 looper letters, 173 selfloop transitions, 15 changer transitions 0/188 dead transitions. [2022-11-25 18:07:18,201 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 188 transitions, 898 flow [2022-11-25 18:07:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:07:18,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:07:18,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2072 transitions. [2022-11-25 18:07:18,207 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48174843059753547 [2022-11-25 18:07:18,207 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2072 transitions. [2022-11-25 18:07:18,207 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2072 transitions. [2022-11-25 18:07:18,208 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:18,208 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2072 transitions. [2022-11-25 18:07:18,213 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 188.36363636363637) internal successors, (2072), 11 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,220 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,220 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 140 flow. Second operand 11 states and 2072 transitions. [2022-11-25 18:07:18,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 188 transitions, 898 flow [2022-11-25 18:07:18,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 188 transitions, 895 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:18,226 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 254 flow [2022-11-25 18:07:18,227 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=254, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2022-11-25 18:07:18,227 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 14 predicate places. [2022-11-25 18:07:18,227 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 254 flow [2022-11-25 18:07:18,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 173.625) internal successors, (2778), 16 states have internal predecessors, (2778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,230 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:18,230 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:18,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:07:18,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:07:18,442 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1445130961, now seen corresponding path program 1 times [2022-11-25 18:07:18,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:18,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895301207] [2022-11-25 18:07:18,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:18,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:18,550 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 18:07:18,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:18,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895301207] [2022-11-25 18:07:18,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895301207] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:18,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:18,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:07:18,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836853959] [2022-11-25 18:07:18,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:18,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:18,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:18,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:18,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:18,569 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 391 [2022-11-25 18:07:18,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:18,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 391 [2022-11-25 18:07:18,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:18,760 INFO L130 PetriNetUnfolder]: 560/1025 cut-off events. [2022-11-25 18:07:18,760 INFO L131 PetriNetUnfolder]: For 793/793 co-relation queries the response was YES. [2022-11-25 18:07:18,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2746 conditions, 1025 events. 560/1025 cut-off events. For 793/793 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4203 event pairs, 73 based on Foata normal form. 44/1001 useless extension candidates. Maximal degree in co-relation 2731. Up to 825 conditions per place. [2022-11-25 18:07:18,767 INFO L137 encePairwiseOnDemand]: 385/391 looper letters, 49 selfloop transitions, 9 changer transitions 0/58 dead transitions. [2022-11-25 18:07:18,767 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 58 transitions, 358 flow [2022-11-25 18:07:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 583 transitions. [2022-11-25 18:07:18,770 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49701619778346123 [2022-11-25 18:07:18,770 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 583 transitions. [2022-11-25 18:07:18,770 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 583 transitions. [2022-11-25 18:07:18,771 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:18,771 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 583 transitions. [2022-11-25 18:07:18,773 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 194.33333333333334) internal successors, (583), 3 states have internal predecessors, (583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,776 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,776 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 254 flow. Second operand 3 states and 583 transitions. [2022-11-25 18:07:18,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 58 transitions, 358 flow [2022-11-25 18:07:18,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 340 flow, removed 6 selfloop flow, removed 4 redundant places. [2022-11-25 18:07:18,781 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 218 flow [2022-11-25 18:07:18,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=218, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2022-11-25 18:07:18,783 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 10 predicate places. [2022-11-25 18:07:18,783 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 218 flow [2022-11-25 18:07:18,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 184.0) internal successors, (552), 3 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:18,783 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:18,784 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:18,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-25 18:07:18,784 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1221860921, now seen corresponding path program 1 times [2022-11-25 18:07:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:18,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401638931] [2022-11-25 18:07:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:18,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:18,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:18,883 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 18:07:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:18,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401638931] [2022-11-25 18:07:18,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401638931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:18,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:18,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:07:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792331942] [2022-11-25 18:07:18,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:18,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:07:18,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:18,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:07:18,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:07:19,007 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 391 [2022-11-25 18:07:19,008 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:19,009 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:19,009 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 391 [2022-11-25 18:07:19,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:19,357 INFO L130 PetriNetUnfolder]: 716/1297 cut-off events. [2022-11-25 18:07:19,357 INFO L131 PetriNetUnfolder]: For 514/514 co-relation queries the response was YES. [2022-11-25 18:07:19,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3562 conditions, 1297 events. 716/1297 cut-off events. For 514/514 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 5385 event pairs, 79 based on Foata normal form. 0/1257 useless extension candidates. Maximal degree in co-relation 3548. Up to 776 conditions per place. [2022-11-25 18:07:19,367 INFO L137 encePairwiseOnDemand]: 385/391 looper letters, 74 selfloop transitions, 6 changer transitions 1/81 dead transitions. [2022-11-25 18:07:19,367 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 81 transitions, 514 flow [2022-11-25 18:07:19,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:07:19,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:07:19,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1113 transitions. [2022-11-25 18:07:19,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4744245524296675 [2022-11-25 18:07:19,371 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1113 transitions. [2022-11-25 18:07:19,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1113 transitions. [2022-11-25 18:07:19,372 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:19,372 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1113 transitions. [2022-11-25 18:07:19,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 185.5) internal successors, (1113), 6 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:19,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 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 18:07:19,379 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 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 18:07:19,379 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 218 flow. Second operand 6 states and 1113 transitions. [2022-11-25 18:07:19,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 81 transitions, 514 flow [2022-11-25 18:07:19,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 497 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:19,385 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 239 flow [2022-11-25 18:07:19,386 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=239, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2022-11-25 18:07:19,387 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 14 predicate places. [2022-11-25 18:07:19,388 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 239 flow [2022-11-25 18:07:19,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 177.8) internal successors, (889), 5 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:19,388 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:19,388 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:19,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-25 18:07:19,389 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:19,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:19,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1815480890, now seen corresponding path program 1 times [2022-11-25 18:07:19,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:19,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285980993] [2022-11-25 18:07:19,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:19,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:19,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:19,861 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 18:07:19,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:19,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285980993] [2022-11-25 18:07:19,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285980993] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:19,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:19,863 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:07:19,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541104278] [2022-11-25 18:07:19,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:19,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:07:19,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:19,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:07:19,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:07:20,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 164 out of 391 [2022-11-25 18:07:20,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 239 flow. Second operand has 11 states, 11 states have (on average 165.72727272727272) internal successors, (1823), 11 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:20,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:20,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 164 of 391 [2022-11-25 18:07:20,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:21,397 INFO L130 PetriNetUnfolder]: 882/1599 cut-off events. [2022-11-25 18:07:21,397 INFO L131 PetriNetUnfolder]: For 868/868 co-relation queries the response was YES. [2022-11-25 18:07:21,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 1599 events. 882/1599 cut-off events. For 868/868 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 7165 event pairs, 129 based on Foata normal form. 6/1535 useless extension candidates. Maximal degree in co-relation 4347. Up to 966 conditions per place. [2022-11-25 18:07:21,408 INFO L137 encePairwiseOnDemand]: 380/391 looper letters, 133 selfloop transitions, 15 changer transitions 1/149 dead transitions. [2022-11-25 18:07:21,408 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 149 transitions, 854 flow [2022-11-25 18:07:21,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:07:21,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:07:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1949 transitions. [2022-11-25 18:07:21,414 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4531504301325273 [2022-11-25 18:07:21,414 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1949 transitions. [2022-11-25 18:07:21,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1949 transitions. [2022-11-25 18:07:21,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:21,416 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1949 transitions. [2022-11-25 18:07:21,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 177.1818181818182) internal successors, (1949), 11 states have internal predecessors, (1949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,444 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,444 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 239 flow. Second operand 11 states and 1949 transitions. [2022-11-25 18:07:21,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 149 transitions, 854 flow [2022-11-25 18:07:21,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 149 transitions, 851 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:21,455 INFO L231 Difference]: Finished difference. Result has 75 places, 60 transitions, 352 flow [2022-11-25 18:07:21,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=352, PETRI_PLACES=75, PETRI_TRANSITIONS=60} [2022-11-25 18:07:21,457 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 27 predicate places. [2022-11-25 18:07:21,457 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 60 transitions, 352 flow [2022-11-25 18:07:21,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 165.72727272727272) internal successors, (1823), 11 states have internal predecessors, (1823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:21,458 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:21,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-25 18:07:21,458 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:21,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:21,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2066399384, now seen corresponding path program 1 times [2022-11-25 18:07:21,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:21,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693629626] [2022-11-25 18:07:21,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:21,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:07:21,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:21,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693629626] [2022-11-25 18:07:21,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693629626] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:21,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:21,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:07:21,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945750297] [2022-11-25 18:07:21,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:21,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:07:21,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:21,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:07:21,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:07:21,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 391 [2022-11-25 18:07:21,529 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 60 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,529 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:21,529 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 391 [2022-11-25 18:07:21,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:21,869 INFO L130 PetriNetUnfolder]: 1123/2070 cut-off events. [2022-11-25 18:07:21,869 INFO L131 PetriNetUnfolder]: For 1868/1868 co-relation queries the response was YES. [2022-11-25 18:07:21,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 2070 events. 1123/2070 cut-off events. For 1868/1868 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 10493 event pairs, 666 based on Foata normal form. 84/2050 useless extension candidates. Maximal degree in co-relation 6005. Up to 1556 conditions per place. [2022-11-25 18:07:21,884 INFO L137 encePairwiseOnDemand]: 387/391 looper letters, 100 selfloop transitions, 3 changer transitions 0/103 dead transitions. [2022-11-25 18:07:21,885 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 103 transitions, 796 flow [2022-11-25 18:07:21,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:07:21,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:07:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-11-25 18:07:21,887 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5157715260017051 [2022-11-25 18:07:21,888 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-11-25 18:07:21,888 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-11-25 18:07:21,888 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:21,888 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-11-25 18:07:21,890 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,892 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,893 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 391.0) internal successors, (1564), 4 states have internal predecessors, (1564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,893 INFO L175 Difference]: Start difference. First operand has 75 places, 60 transitions, 352 flow. Second operand 3 states and 605 transitions. [2022-11-25 18:07:21,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 103 transitions, 796 flow [2022-11-25 18:07:21,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 771 flow, removed 7 selfloop flow, removed 3 redundant places. [2022-11-25 18:07:21,903 INFO L231 Difference]: Finished difference. Result has 75 places, 62 transitions, 353 flow [2022-11-25 18:07:21,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=353, PETRI_PLACES=75, PETRI_TRANSITIONS=62} [2022-11-25 18:07:21,904 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 27 predicate places. [2022-11-25 18:07:21,904 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 62 transitions, 353 flow [2022-11-25 18:07:21,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.0) internal successors, (561), 3 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:21,905 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:21,905 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:21,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-25 18:07:21,905 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:21,906 INFO L85 PathProgramCache]: Analyzing trace with hash -630781052, now seen corresponding path program 1 times [2022-11-25 18:07:21,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:21,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307490046] [2022-11-25 18:07:21,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:21,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:22,657 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 18:07:22,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:22,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307490046] [2022-11-25 18:07:22,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307490046] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:22,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:22,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:07:22,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489605567] [2022-11-25 18:07:22,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:22,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:07:22,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:22,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:07:22,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:07:23,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 155 out of 391 [2022-11-25 18:07:23,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 62 transitions, 353 flow. Second operand has 14 states, 14 states have (on average 156.5) internal successors, (2191), 14 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:23,909 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:23,909 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 155 of 391 [2022-11-25 18:07:23,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:25,355 INFO L130 PetriNetUnfolder]: 1426/2628 cut-off events. [2022-11-25 18:07:25,355 INFO L131 PetriNetUnfolder]: For 2288/2288 co-relation queries the response was YES. [2022-11-25 18:07:25,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8044 conditions, 2628 events. 1426/2628 cut-off events. For 2288/2288 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 13640 event pairs, 350 based on Foata normal form. 12/2548 useless extension candidates. Maximal degree in co-relation 8021. Up to 1907 conditions per place. [2022-11-25 18:07:25,380 INFO L137 encePairwiseOnDemand]: 375/391 looper letters, 140 selfloop transitions, 29 changer transitions 1/170 dead transitions. [2022-11-25 18:07:25,380 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 170 transitions, 1114 flow [2022-11-25 18:07:25,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:07:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2022-11-25 18:07:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 2779 transitions. [2022-11-25 18:07:25,388 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4180833458703174 [2022-11-25 18:07:25,389 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 2779 transitions. [2022-11-25 18:07:25,389 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 2779 transitions. [2022-11-25 18:07:25,391 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:25,391 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 2779 transitions. [2022-11-25 18:07:25,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 163.47058823529412) internal successors, (2779), 17 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:25,408 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 391.0) internal successors, (7038), 18 states have internal predecessors, (7038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:25,411 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 391.0) internal successors, (7038), 18 states have internal predecessors, (7038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:25,411 INFO L175 Difference]: Start difference. First operand has 75 places, 62 transitions, 353 flow. Second operand 17 states and 2779 transitions. [2022-11-25 18:07:25,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 170 transitions, 1114 flow [2022-11-25 18:07:25,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 170 transitions, 1101 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:07:25,426 INFO L231 Difference]: Finished difference. Result has 99 places, 88 transitions, 585 flow [2022-11-25 18:07:25,427 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=585, PETRI_PLACES=99, PETRI_TRANSITIONS=88} [2022-11-25 18:07:25,427 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 51 predicate places. [2022-11-25 18:07:25,428 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 88 transitions, 585 flow [2022-11-25 18:07:25,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 156.5) internal successors, (2191), 14 states have internal predecessors, (2191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:25,429 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:25,429 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:25,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-25 18:07:25,429 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:25,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:25,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1487557300, now seen corresponding path program 2 times [2022-11-25 18:07:25,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:25,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747723357] [2022-11-25 18:07:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:25,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:26,526 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 18:07:26,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:26,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747723357] [2022-11-25 18:07:26,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747723357] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:26,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:26,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 18:07:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377795312] [2022-11-25 18:07:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:26,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:07:26,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:26,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:07:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:07:28,037 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 391 [2022-11-25 18:07:28,039 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 88 transitions, 585 flow. Second operand has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:28,039 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:28,039 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 391 [2022-11-25 18:07:28,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:29,449 INFO L130 PetriNetUnfolder]: 1719/3166 cut-off events. [2022-11-25 18:07:29,449 INFO L131 PetriNetUnfolder]: For 3229/3229 co-relation queries the response was YES. [2022-11-25 18:07:29,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10428 conditions, 3166 events. 1719/3166 cut-off events. For 3229/3229 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 17288 event pairs, 473 based on Foata normal form. 12/3062 useless extension candidates. Maximal degree in co-relation 10396. Up to 1937 conditions per place. [2022-11-25 18:07:29,480 INFO L137 encePairwiseOnDemand]: 375/391 looper letters, 140 selfloop transitions, 36 changer transitions 1/177 dead transitions. [2022-11-25 18:07:29,480 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 177 transitions, 1314 flow [2022-11-25 18:07:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:07:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:07:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2109 transitions. [2022-11-25 18:07:29,487 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41491245327562465 [2022-11-25 18:07:29,487 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2109 transitions. [2022-11-25 18:07:29,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2109 transitions. [2022-11-25 18:07:29,489 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:29,489 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2109 transitions. [2022-11-25 18:07:29,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 162.23076923076923) internal successors, (2109), 13 states have internal predecessors, (2109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:29,500 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 391.0) internal successors, (5474), 14 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:29,501 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 391.0) internal successors, (5474), 14 states have internal predecessors, (5474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:29,502 INFO L175 Difference]: Start difference. First operand has 99 places, 88 transitions, 585 flow. Second operand 13 states and 2109 transitions. [2022-11-25 18:07:29,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 177 transitions, 1314 flow [2022-11-25 18:07:29,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 177 transitions, 1307 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:07:29,518 INFO L231 Difference]: Finished difference. Result has 115 places, 100 transitions, 800 flow [2022-11-25 18:07:29,518 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=800, PETRI_PLACES=115, PETRI_TRANSITIONS=100} [2022-11-25 18:07:29,519 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 67 predicate places. [2022-11-25 18:07:29,519 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 100 transitions, 800 flow [2022-11-25 18:07:29,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:29,520 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:29,520 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:29,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-25 18:07:29,520 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:29,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:29,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1066588318, now seen corresponding path program 3 times [2022-11-25 18:07:29,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:29,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360275742] [2022-11-25 18:07:29,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:29,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:30,541 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 18:07:30,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:30,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360275742] [2022-11-25 18:07:30,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360275742] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:07:30,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:07:30,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 18:07:30,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118930733] [2022-11-25 18:07:30,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:07:30,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:07:30,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:30,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:07:30,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:07:32,488 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 391 [2022-11-25 18:07:32,489 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 100 transitions, 800 flow. Second operand has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:32,489 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:32,490 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 391 [2022-11-25 18:07:32,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:34,262 INFO L130 PetriNetUnfolder]: 1707/3142 cut-off events. [2022-11-25 18:07:34,262 INFO L131 PetriNetUnfolder]: For 4303/4303 co-relation queries the response was YES. [2022-11-25 18:07:34,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11072 conditions, 3142 events. 1707/3142 cut-off events. For 4303/4303 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 17000 event pairs, 421 based on Foata normal form. 12/3038 useless extension candidates. Maximal degree in co-relation 11033. Up to 1403 conditions per place. [2022-11-25 18:07:34,297 INFO L137 encePairwiseOnDemand]: 375/391 looper letters, 130 selfloop transitions, 48 changer transitions 1/179 dead transitions. [2022-11-25 18:07:34,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 179 transitions, 1462 flow [2022-11-25 18:07:34,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 18:07:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-25 18:07:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 2261 transitions. [2022-11-25 18:07:34,306 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41304347826086957 [2022-11-25 18:07:34,306 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 2261 transitions. [2022-11-25 18:07:34,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 2261 transitions. [2022-11-25 18:07:34,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:34,309 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 2261 transitions. [2022-11-25 18:07:34,314 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 161.5) internal successors, (2261), 14 states have internal predecessors, (2261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:34,322 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 391.0) internal successors, (5865), 15 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:34,324 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 391.0) internal successors, (5865), 15 states have internal predecessors, (5865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:34,325 INFO L175 Difference]: Start difference. First operand has 115 places, 100 transitions, 800 flow. Second operand 14 states and 2261 transitions. [2022-11-25 18:07:34,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 179 transitions, 1462 flow [2022-11-25 18:07:34,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 179 transitions, 1413 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-11-25 18:07:34,353 INFO L231 Difference]: Finished difference. Result has 127 places, 107 transitions, 956 flow [2022-11-25 18:07:34,354 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=956, PETRI_PLACES=127, PETRI_TRANSITIONS=107} [2022-11-25 18:07:34,354 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 79 predicate places. [2022-11-25 18:07:34,355 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 107 transitions, 956 flow [2022-11-25 18:07:34,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 153.4) internal successors, (2301), 15 states have internal predecessors, (2301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:34,356 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:34,356 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-25 18:07:34,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-25 18:07:34,356 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:34,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:34,357 INFO L85 PathProgramCache]: Analyzing trace with hash 318475860, now seen corresponding path program 1 times [2022-11-25 18:07:34,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:34,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780466271] [2022-11-25 18:07:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:34,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:34,481 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:34,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:34,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780466271] [2022-11-25 18:07:34,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780466271] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:07:34,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924203593] [2022-11-25 18:07:34,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:34,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:34,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:34,488 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:07:34,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:07:34,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:34,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:07:34,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:34,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:07:34,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924203593] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:07:34,805 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:07:34,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2022-11-25 18:07:34,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407160769] [2022-11-25 18:07:34,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:07:34,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:07:34,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:34,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:07:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:07:34,892 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 391 [2022-11-25 18:07:34,895 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 107 transitions, 956 flow. Second operand has 14 states, 14 states have (on average 180.71428571428572) internal successors, (2530), 14 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:34,895 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:34,895 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 391 [2022-11-25 18:07:34,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:36,100 INFO L130 PetriNetUnfolder]: 2426/4474 cut-off events. [2022-11-25 18:07:36,100 INFO L131 PetriNetUnfolder]: For 6948/6948 co-relation queries the response was YES. [2022-11-25 18:07:36,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15989 conditions, 4474 events. 2426/4474 cut-off events. For 6948/6948 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 23173 event pairs, 649 based on Foata normal form. 66/4370 useless extension candidates. Maximal degree in co-relation 15945. Up to 1643 conditions per place. [2022-11-25 18:07:36,144 INFO L137 encePairwiseOnDemand]: 384/391 looper letters, 230 selfloop transitions, 38 changer transitions 0/268 dead transitions. [2022-11-25 18:07:36,144 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 268 transitions, 2318 flow [2022-11-25 18:07:36,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:07:36,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:07:36,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2136 transitions. [2022-11-25 18:07:36,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49662869100209256 [2022-11-25 18:07:36,151 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2136 transitions. [2022-11-25 18:07:36,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2136 transitions. [2022-11-25 18:07:36,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:36,153 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2136 transitions. [2022-11-25 18:07:36,156 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 194.1818181818182) internal successors, (2136), 11 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:36,162 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:36,163 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 391.0) internal successors, (4692), 12 states have internal predecessors, (4692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:36,163 INFO L175 Difference]: Start difference. First operand has 127 places, 107 transitions, 956 flow. Second operand 11 states and 2136 transitions. [2022-11-25 18:07:36,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 268 transitions, 2318 flow [2022-11-25 18:07:36,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 268 transitions, 2249 flow, removed 16 selfloop flow, removed 8 redundant places. [2022-11-25 18:07:36,205 INFO L231 Difference]: Finished difference. Result has 134 places, 130 transitions, 1238 flow [2022-11-25 18:07:36,206 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=905, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1238, PETRI_PLACES=134, PETRI_TRANSITIONS=130} [2022-11-25 18:07:36,206 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 86 predicate places. [2022-11-25 18:07:36,206 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 130 transitions, 1238 flow [2022-11-25 18:07:36,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 180.71428571428572) internal successors, (2530), 14 states have internal predecessors, (2530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:36,207 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:36,208 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:36,215 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 18:07:36,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:36,414 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:36,414 INFO L85 PathProgramCache]: Analyzing trace with hash -516162917, now seen corresponding path program 1 times [2022-11-25 18:07:36,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:36,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218086127] [2022-11-25 18:07:36,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:36,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:36,477 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 18:07:36,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:07:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218086127] [2022-11-25 18:07:36,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218086127] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:07:36,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931598824] [2022-11-25 18:07:36,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:36,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:36,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:36,480 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:07:36,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:07:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:07:36,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:07:36,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:07:36,637 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 18:07:36,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:07:36,661 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 18:07:36,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931598824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:07:36,662 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-25 18:07:36,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-25 18:07:36,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152081618] [2022-11-25 18:07:36,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-25 18:07:36,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:07:36,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:07:36,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:07:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:07:36,679 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 179 out of 391 [2022-11-25 18:07:36,680 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 130 transitions, 1238 flow. Second operand has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:36,681 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:07:36,681 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 179 of 391 [2022-11-25 18:07:36,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:07:38,626 INFO L130 PetriNetUnfolder]: 4831/9025 cut-off events. [2022-11-25 18:07:38,627 INFO L131 PetriNetUnfolder]: For 19367/19367 co-relation queries the response was YES. [2022-11-25 18:07:38,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33216 conditions, 9025 events. 4831/9025 cut-off events. For 19367/19367 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 57213 event pairs, 1181 based on Foata normal form. 1218/9701 useless extension candidates. Maximal degree in co-relation 33166. Up to 2316 conditions per place. [2022-11-25 18:07:38,730 INFO L137 encePairwiseOnDemand]: 385/391 looper letters, 434 selfloop transitions, 23 changer transitions 0/457 dead transitions. [2022-11-25 18:07:38,730 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 457 transitions, 5301 flow [2022-11-25 18:07:38,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:07:38,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:07:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1215 transitions. [2022-11-25 18:07:38,733 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5179028132992327 [2022-11-25 18:07:38,733 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1215 transitions. [2022-11-25 18:07:38,733 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1215 transitions. [2022-11-25 18:07:38,734 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:07:38,734 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1215 transitions. [2022-11-25 18:07:38,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 202.5) internal successors, (1215), 6 states have internal predecessors, (1215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:38,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 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 18:07:38,741 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 391.0) internal successors, (2737), 7 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 18:07:38,741 INFO L175 Difference]: Start difference. First operand has 134 places, 130 transitions, 1238 flow. Second operand 6 states and 1215 transitions. [2022-11-25 18:07:38,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 457 transitions, 5301 flow [2022-11-25 18:07:38,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 457 transitions, 5095 flow, removed 103 selfloop flow, removed 0 redundant places. [2022-11-25 18:07:38,868 INFO L231 Difference]: Finished difference. Result has 143 places, 142 transitions, 1398 flow [2022-11-25 18:07:38,868 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=391, PETRI_DIFFERENCE_MINUEND_FLOW=1186, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1398, PETRI_PLACES=143, PETRI_TRANSITIONS=142} [2022-11-25 18:07:38,868 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 95 predicate places. [2022-11-25 18:07:38,869 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 142 transitions, 1398 flow [2022-11-25 18:07:38,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 183.85714285714286) internal successors, (1287), 7 states have internal predecessors, (1287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:07:38,869 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:07:38,870 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:38,879 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:07:39,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:07:39,076 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:07:39,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:07:39,076 INFO L85 PathProgramCache]: Analyzing trace with hash -356184291, now seen corresponding path program 1 times [2022-11-25 18:07:39,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:07:39,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890074754] [2022-11-25 18:07:39,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:07:39,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:07:39,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:07:39,135 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:07:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:07:39,222 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-25 18:07:39,222 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:07:39,224 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-25 18:07:39,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-25 18:07:39,226 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-25 18:07:39,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-25 18:07:39,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-25 18:07:39,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-25 18:07:39,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-25 18:07:39,227 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-25 18:07:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-25 18:07:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-11-25 18:07:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-11-25 18:07:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-11-25 18:07:39,228 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-25 18:07:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-25 18:07:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-11-25 18:07:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-11-25 18:07:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-25 18:07:39,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-11-25 18:07:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-25 18:07:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-25 18:07:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-11-25 18:07:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-25 18:07:39,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-25 18:07:39,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-25 18:07:39,231 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:07:39,238 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 18:07:39,238 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:07:39,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:07:39 BasicIcfg [2022-11-25 18:07:39,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:07:39,301 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:07:39,301 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:07:39,301 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:07:39,302 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:01" (3/4) ... [2022-11-25 18:07:39,304 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 18:07:39,305 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:07:39,305 INFO L158 Benchmark]: Toolchain (without parser) took 39260.47ms. Allocated memory was 142.6MB in the beginning and 476.1MB in the end (delta: 333.4MB). Free memory was 109.9MB in the beginning and 220.5MB in the end (delta: -110.6MB). Peak memory consumption was 225.3MB. Max. memory is 16.1GB. [2022-11-25 18:07:39,306 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 142.6MB. Free memory is still 115.8MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:07:39,306 INFO L158 Benchmark]: CACSL2BoogieTranslator took 810.68ms. Allocated memory is still 142.6MB. Free memory was 109.9MB in the beginning and 80.5MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. [2022-11-25 18:07:39,306 INFO L158 Benchmark]: Boogie Procedure Inliner took 90.12ms. Allocated memory is still 142.6MB. Free memory was 80.5MB in the beginning and 77.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:07:39,307 INFO L158 Benchmark]: Boogie Preprocessor took 65.19ms. Allocated memory is still 142.6MB. Free memory was 77.9MB in the beginning and 75.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:07:39,307 INFO L158 Benchmark]: RCFGBuilder took 694.00ms. Allocated memory is still 142.6MB. Free memory was 75.8MB in the beginning and 110.6MB in the end (delta: -34.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-25 18:07:39,307 INFO L158 Benchmark]: TraceAbstraction took 37586.83ms. Allocated memory was 142.6MB in the beginning and 476.1MB in the end (delta: 333.4MB). Free memory was 109.9MB in the beginning and 221.6MB in the end (delta: -111.7MB). Peak memory consumption was 223.2MB. Max. memory is 16.1GB. [2022-11-25 18:07:39,309 INFO L158 Benchmark]: Witness Printer took 4.16ms. Allocated memory is still 476.1MB. Free memory was 221.6MB in the beginning and 220.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:07:39,314 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 142.6MB. Free memory is still 115.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 810.68ms. Allocated memory is still 142.6MB. Free memory was 109.9MB in the beginning and 80.5MB in the end (delta: 29.4MB). Peak memory consumption was 29.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 90.12ms. Allocated memory is still 142.6MB. Free memory was 80.5MB in the beginning and 77.9MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 65.19ms. Allocated memory is still 142.6MB. Free memory was 77.9MB in the beginning and 75.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 694.00ms. Allocated memory is still 142.6MB. Free memory was 75.8MB in the beginning and 110.6MB in the end (delta: -34.7MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * TraceAbstraction took 37586.83ms. Allocated memory was 142.6MB in the beginning and 476.1MB in the end (delta: 333.4MB). Free memory was 109.9MB in the beginning and 221.6MB in the end (delta: -111.7MB). Peak memory consumption was 223.2MB. Max. memory is 16.1GB. * Witness Printer took 4.16ms. Allocated memory is still 476.1MB. Free memory was 221.6MB in the beginning and 220.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 7.4s, 185 PlacesBefore, 48 PlacesAfterwards, 188 TransitionsBefore, 47 TransitionsAfterwards, 11140 CoEnabledTransitionPairs, 7 FixpointIterations, 40 TrivialSequentialCompositions, 125 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 27 ConcurrentYvCompositions, 4 ChoiceCompositions, 196 TotalNumberOfCompositions, 16603 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12818, independent: 12590, independent conditional: 0, independent unconditional: 12590, dependent: 228, dependent conditional: 0, dependent unconditional: 228, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 8014, independent: 7942, independent conditional: 0, independent unconditional: 7942, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 8014, independent: 7913, independent conditional: 0, independent unconditional: 7913, dependent: 101, dependent conditional: 0, dependent unconditional: 101, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 101, independent: 29, independent conditional: 0, independent unconditional: 29, dependent: 72, dependent conditional: 0, dependent unconditional: 72, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 254, independent: 54, independent conditional: 0, independent unconditional: 54, dependent: 200, dependent conditional: 0, dependent unconditional: 200, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 12818, independent: 4648, independent conditional: 0, independent unconditional: 4648, dependent: 156, dependent conditional: 0, dependent unconditional: 156, unknown: 8014, unknown conditional: 0, unknown unconditional: 8014] , Statistics on independence cache: Total cache size (in pairs): 441, Positive cache size: 415, Positive conditional cache size: 0, Positive unconditional cache size: 415, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=9, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={6:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=10, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) VAL [\old(x)=7, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=7] [L967] CALL, EXPR 1 get_top() [L952] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=7, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=7, top=1] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 308 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 37.3s, OverallIterations: 21, TraceHistogramMax: 3, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 21.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 7.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4668 SdHoareTripleChecker+Valid, 12.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3889 mSDsluCounter, 5451 SdHoareTripleChecker+Invalid, 10.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 5129 mSDsCounter, 166 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 17132 IncrementalHoareTripleChecker+Invalid, 17298 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 166 mSolverCounterUnsat, 322 mSDtfsCounter, 17132 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 2.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1398occurred in iteration=20, InterpolantAutomatonStates: 126, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.7s InterpolantComputationTime, 342 NumberOfCodeBlocks, 342 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 351 ConstructedInterpolants, 0 QuantifiedInterpolants, 2805 SizeOfPredicates, 11 NumberOfNonLiveVariables, 692 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 26 InterpolantComputations, 17 PerfectInterpolantSequences, 10/58 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 18:07:39,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/stack_longer-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/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 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 --- 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 18:07:42,026 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:07:42,030 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:07:42,061 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:07:42,062 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:07:42,066 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:07:42,072 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:07:42,077 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:07:42,080 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:07:42,081 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:07:42,083 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:07:42,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:07:42,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:07:42,095 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:07:42,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:07:42,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:07:42,102 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:07:42,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:07:42,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:07:42,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:07:42,110 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:07:42,112 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:07:42,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:07:42,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:07:42,119 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:07:42,119 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:07:42,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:07:42,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:07:42,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:07:42,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:07:42,123 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:07:42,124 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:07:42,125 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:07:42,126 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:07:42,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:07:42,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:07:42,144 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:07:42,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:07:42,145 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:07:42,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:07:42,146 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:07:42,147 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2022-11-25 18:07:42,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:07:42,190 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:07:42,190 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:07:42,191 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:07:42,191 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:07:42,192 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:07:42,193 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:07:42,193 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:07:42,193 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:07:42,193 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:07:42,194 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:07:42,194 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-25 18:07:42,194 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:07:42,194 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:07:42,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:07:42,195 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2022-11-25 18:07:42,195 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2022-11-25 18:07:42,195 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2022-11-25 18:07:42,196 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:07:42,196 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-11-25 18:07:42,196 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2022-11-25 18:07:42,196 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2022-11-25 18:07:42,197 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:07:42,197 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:07:42,197 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:07:42,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:07:42,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:07:42,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:07:42,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:07:42,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:07:42,199 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2022-11-25 18:07:42,199 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2022-11-25 18:07:42,199 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:07:42,200 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:07:42,200 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:07:42,200 INFO L138 SettingsManager]: * Logic for external solver=AUFBV [2022-11-25 18:07:42,200 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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4351dece6a672e511bbcb86915e62fc8a7361763ad7ab88f2e640b2d00ea50a7 [2022-11-25 18:07:42,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:07:42,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:07:42,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:07:42,720 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:07:42,720 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:07:42,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-25 18:07:45,846 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:07:46,240 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:07:46,244 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/sv-benchmarks/c/pthread/stack_longer-1.i [2022-11-25 18:07:46,275 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data/82fad1109/616606207d4c430695ff69d88cef3f67/FLAG4880dcd26 [2022-11-25 18:07:46,295 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/data/82fad1109/616606207d4c430695ff69d88cef3f67 [2022-11-25 18:07:46,300 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:07:46,303 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:07:46,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:07:46,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:07:46,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:07:46,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:46" (1/1) ... [2022-11-25 18:07:46,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d400396 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:46, skipping insertion in model container [2022-11-25 18:07:46,315 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:07:46" (1/1) ... [2022-11-25 18:07:46,323 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:07:46,395 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:07:47,091 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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-25 18:07:47,131 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:07:47,154 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:07:47,232 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_9254f9fb-96fb-4d98-8104-ad3a794b29f4/sv-benchmarks/c/pthread/stack_longer-1.i[41527,41540] [2022-11-25 18:07:47,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:07:47,353 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:07:47,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47 WrapperNode [2022-11-25 18:07:47,354 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:07:47,356 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:07:47,356 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:07:47,356 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:07:47,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,400 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,451 INFO L138 Inliner]: procedures = 281, calls = 39, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 151 [2022-11-25 18:07:47,452 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:07:47,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:07:47,453 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:07:47,453 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:07:47,464 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,465 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,484 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,509 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,513 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,527 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,531 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:07:47,532 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:07:47,532 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:07:47,532 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:07:47,533 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (1/1) ... [2022-11-25 18:07:47,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:07:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:07:47,587 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:07:47,615 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:07:47,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2022-11-25 18:07:47,641 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-25 18:07:47,641 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-25 18:07:47,641 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-25 18:07:47,641 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-25 18:07:47,641 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:07:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:07:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2022-11-25 18:07:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2022-11-25 18:07:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2022-11-25 18:07:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-25 18:07:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:07:47,643 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:07:47,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:07:47,645 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 18:07:47,856 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:07:47,859 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:07:48,404 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:07:48,414 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:07:48,423 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-25 18:07:48,426 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:48 BoogieIcfgContainer [2022-11-25 18:07:48,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:07:48,429 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:07:48,431 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:07:48,434 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:07:48,435 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:07:46" (1/3) ... [2022-11-25 18:07:48,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1090f1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:48, skipping insertion in model container [2022-11-25 18:07:48,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:07:47" (2/3) ... [2022-11-25 18:07:48,439 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1090f1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:07:48, skipping insertion in model container [2022-11-25 18:07:48,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:48" (3/3) ... [2022-11-25 18:07:48,440 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longer-1.i [2022-11-25 18:07:48,462 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:07:48,462 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2022-11-25 18:07:48,462 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-25 18:07:48,679 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-25 18:07:48,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 188 places, 191 transitions, 398 flow [2022-11-25 18:07:48,888 INFO L130 PetriNetUnfolder]: 10/189 cut-off events. [2022-11-25 18:07:48,890 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:07:48,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198 conditions, 189 events. 10/189 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 497 event pairs, 0 based on Foata normal form. 0/164 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2022-11-25 18:07:48,899 INFO L82 GeneralOperation]: Start removeDead. Operand has 188 places, 191 transitions, 398 flow [2022-11-25 18:07:48,911 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 181 places, 184 transitions, 380 flow [2022-11-25 18:07:48,916 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-25 18:07:48,944 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 181 places, 184 transitions, 380 flow [2022-11-25 18:07:48,949 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 181 places, 184 transitions, 380 flow [2022-11-25 18:07:48,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 181 places, 184 transitions, 380 flow [2022-11-25 18:07:49,033 INFO L130 PetriNetUnfolder]: 10/184 cut-off events. [2022-11-25 18:07:49,033 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-25 18:07:49,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 193 conditions, 184 events. 10/184 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 477 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 138. Up to 3 conditions per place. [2022-11-25 18:07:49,046 INFO L119 LiptonReduction]: Number of co-enabled transitions 10398 [2022-11-25 18:08:06,995 INFO L134 LiptonReduction]: Checked pairs total: 14851 [2022-11-25 18:08:06,995 INFO L136 LiptonReduction]: Total number of compositions: 189 [2022-11-25 18:08:07,013 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:08:07,020 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;@7f21e91c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:08:07,021 INFO L358 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2022-11-25 18:08:07,023 INFO L130 PetriNetUnfolder]: 0/0 cut-off events. [2022-11-25 18:08:07,023 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-25 18:08:07,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:07,024 INFO L209 CegarLoopForPetriNet]: trace histogram [1] [2022-11-25 18:08:07,025 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:07,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:07,030 INFO L85 PathProgramCache]: Analyzing trace with hash 777, now seen corresponding path program 1 times [2022-11-25 18:08:07,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:07,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115265938] [2022-11-25 18:08:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:07,045 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:07,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:07,055 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:07,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2022-11-25 18:08:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:07,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 3 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 18:08:07,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:07,162 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 18:08:07,163 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:07,163 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:07,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2115265938] [2022-11-25 18:08:07,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2115265938] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:07,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:07,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-11-25 18:08:07,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4538062] [2022-11-25 18:08:07,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:07,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:08:07,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:07,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:08:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:08:07,204 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 180 out of 380 [2022-11-25 18:08:07,207 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 104 flow. Second operand has 2 states, 2 states have (on average 180.5) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:07,207 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:07,207 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 180 of 380 [2022-11-25 18:08:07,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:07,737 INFO L130 PetriNetUnfolder]: 1456/2239 cut-off events. [2022-11-25 18:08:07,737 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-11-25 18:08:07,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4524 conditions, 2239 events. 1456/2239 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10297 event pairs, 1176 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 4272. Up to 2240 conditions per place. [2022-11-25 18:08:07,759 INFO L137 encePairwiseOnDemand]: 378/380 looper letters, 44 selfloop transitions, 0 changer transitions 0/44 dead transitions. [2022-11-25 18:08:07,759 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 188 flow [2022-11-25 18:08:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:08:07,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-25 18:08:07,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 406 transitions. [2022-11-25 18:08:07,790 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5342105263157895 [2022-11-25 18:08:07,791 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 406 transitions. [2022-11-25 18:08:07,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 406 transitions. [2022-11-25 18:08:07,797 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:07,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 406 transitions. [2022-11-25 18:08:07,808 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 203.0) internal successors, (406), 2 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:07,815 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:07,816 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 380.0) internal successors, (1140), 3 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:07,819 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 104 flow. Second operand 2 states and 406 transitions. [2022-11-25 18:08:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 188 flow [2022-11-25 18:08:07,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 180 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-25 18:08:07,828 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 92 flow [2022-11-25 18:08:07,830 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2022-11-25 18:08:07,836 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 18:08:07,837 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 92 flow [2022-11-25 18:08:07,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 180.5) internal successors, (361), 2 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:07,841 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:07,841 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:08:07,865 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:08,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:08,065 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:08,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 765573, now seen corresponding path program 1 times [2022-11-25 18:08:08,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:08,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [155403608] [2022-11-25 18:08:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:08,068 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:08,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:08,072 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:08,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2022-11-25 18:08:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:08,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:08:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:08,305 INFO L321 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2022-11-25 18:08:08,306 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 19 [2022-11-25 18:08:08,321 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 18:08:08,321 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:08,321 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:08,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [155403608] [2022-11-25 18:08:08,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [155403608] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:08,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:08,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:08:08,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043323034] [2022-11-25 18:08:08,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:08,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:08,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:08,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:08,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:08,439 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 380 [2022-11-25 18:08:08,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:08,441 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:08,441 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 380 [2022-11-25 18:08:08,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:08,866 INFO L130 PetriNetUnfolder]: 1427/2184 cut-off events. [2022-11-25 18:08:08,866 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:08:08,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4385 conditions, 2184 events. 1427/2184 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 9946 event pairs, 1152 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 4382. Up to 2183 conditions per place. [2022-11-25 18:08:08,883 INFO L137 encePairwiseOnDemand]: 376/380 looper letters, 40 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2022-11-25 18:08:08,884 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 172 flow [2022-11-25 18:08:08,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:08,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:08,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 557 transitions. [2022-11-25 18:08:08,888 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4885964912280702 [2022-11-25 18:08:08,889 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 557 transitions. [2022-11-25 18:08:08,889 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 557 transitions. [2022-11-25 18:08:08,890 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:08,890 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 557 transitions. [2022-11-25 18:08:08,892 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:08,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:08,900 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:08,900 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 92 flow. Second operand 3 states and 557 transitions. [2022-11-25 18:08:08,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 172 flow [2022-11-25 18:08:08,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-25 18:08:08,902 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 92 flow [2022-11-25 18:08:08,903 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2022-11-25 18:08:08,904 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 18:08:08,904 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 92 flow [2022-11-25 18:08:08,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:08,907 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:08,908 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2022-11-25 18:08:08,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:09,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:09,121 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:09,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash 765572, now seen corresponding path program 1 times [2022-11-25 18:08:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:09,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154179944] [2022-11-25 18:08:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:09,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:09,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:09,129 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:09,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2022-11-25 18:08:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:08:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:09,249 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2022-11-25 18:08:09,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 18:08:09,284 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 18:08:09,284 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:09,285 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:09,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154179944] [2022-11-25 18:08:09,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154179944] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:09,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:09,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:08:09,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697212048] [2022-11-25 18:08:09,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:09,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:09,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:09,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:09,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:09,413 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 380 [2022-11-25 18:08:09,414 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:09,414 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:09,415 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 380 [2022-11-25 18:08:09,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:09,748 INFO L130 PetriNetUnfolder]: 1398/2129 cut-off events. [2022-11-25 18:08:09,748 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:08:09,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 2129 events. 1398/2129 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 9606 event pairs, 1128 based on Foata normal form. 0/1197 useless extension candidates. Maximal degree in co-relation 4274. Up to 2128 conditions per place. [2022-11-25 18:08:09,762 INFO L137 encePairwiseOnDemand]: 376/380 looper letters, 38 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2022-11-25 18:08:09,762 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 40 transitions, 168 flow [2022-11-25 18:08:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 567 transitions. [2022-11-25 18:08:09,766 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49736842105263157 [2022-11-25 18:08:09,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 567 transitions. [2022-11-25 18:08:09,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 567 transitions. [2022-11-25 18:08:09,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:09,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 567 transitions. [2022-11-25 18:08:09,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 189.0) internal successors, (567), 3 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:09,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:09,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:09,773 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 92 flow. Second operand 3 states and 567 transitions. [2022-11-25 18:08:09,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 40 transitions, 168 flow [2022-11-25 18:08:09,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 40 transitions, 164 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:09,775 INFO L231 Difference]: Finished difference. Result has 41 places, 40 transitions, 88 flow [2022-11-25 18:08:09,775 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=41, PETRI_TRANSITIONS=40} [2022-11-25 18:08:09,776 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -7 predicate places. [2022-11-25 18:08:09,777 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 40 transitions, 88 flow [2022-11-25 18:08:09,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:09,778 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:09,778 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:08:09,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:09,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:09,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:09,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:09,992 INFO L85 PathProgramCache]: Analyzing trace with hash 735731686, now seen corresponding path program 1 times [2022-11-25 18:08:09,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:09,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774362337] [2022-11-25 18:08:09,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:09,993 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:09,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:10,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:10,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2022-11-25 18:08:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:10,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:08:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:10,159 INFO L321 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-11-25 18:08:10,160 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2022-11-25 18:08:10,211 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 18:08:10,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:10,211 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:10,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774362337] [2022-11-25 18:08:10,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774362337] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:10,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:10,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:08:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909026195] [2022-11-25 18:08:10,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:10,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:10,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:10,351 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 380 [2022-11-25 18:08:10,352 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 40 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:10,352 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:10,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 380 [2022-11-25 18:08:10,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:10,625 INFO L130 PetriNetUnfolder]: 1021/1583 cut-off events. [2022-11-25 18:08:10,625 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:08:10,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3186 conditions, 1583 events. 1021/1583 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 6897 event pairs, 816 based on Foata normal form. 0/963 useless extension candidates. Maximal degree in co-relation 3182. Up to 1582 conditions per place. [2022-11-25 18:08:10,634 INFO L137 encePairwiseOnDemand]: 377/380 looper letters, 37 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2022-11-25 18:08:10,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 39 transitions, 164 flow [2022-11-25 18:08:10,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:10,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 553 transitions. [2022-11-25 18:08:10,637 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4850877192982456 [2022-11-25 18:08:10,637 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 553 transitions. [2022-11-25 18:08:10,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 553 transitions. [2022-11-25 18:08:10,638 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:10,638 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 553 transitions. [2022-11-25 18:08:10,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 184.33333333333334) internal successors, (553), 3 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:10,642 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:10,643 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:10,643 INFO L175 Difference]: Start difference. First operand has 41 places, 40 transitions, 88 flow. Second operand 3 states and 553 transitions. [2022-11-25 18:08:10,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 39 transitions, 164 flow [2022-11-25 18:08:10,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 160 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:10,646 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 86 flow [2022-11-25 18:08:10,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=86, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2022-11-25 18:08:10,648 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -8 predicate places. [2022-11-25 18:08:10,648 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 86 flow [2022-11-25 18:08:10,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:10,649 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:10,649 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2022-11-25 18:08:10,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:10,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:10,863 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:10,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:10,864 INFO L85 PathProgramCache]: Analyzing trace with hash 735731687, now seen corresponding path program 1 times [2022-11-25 18:08:10,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:10,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894965089] [2022-11-25 18:08:10,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:10,866 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:10,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:10,867 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:10,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2022-11-25 18:08:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:10,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:08:10,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:11,012 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-11-25 18:08:11,013 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2022-11-25 18:08:11,067 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 18:08:11,067 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:11,067 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:11,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1894965089] [2022-11-25 18:08:11,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1894965089] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:11,068 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:11,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-25 18:08:11,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122731183] [2022-11-25 18:08:11,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:11,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:11,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:11,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:11,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:11,179 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 380 [2022-11-25 18:08:11,180 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:11,180 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:11,180 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 380 [2022-11-25 18:08:11,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:11,408 INFO L130 PetriNetUnfolder]: 644/1037 cut-off events. [2022-11-25 18:08:11,408 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:08:11,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 1037 events. 644/1037 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4339 event pairs, 504 based on Foata normal form. 0/729 useless extension candidates. Maximal degree in co-relation 2090. Up to 1036 conditions per place. [2022-11-25 18:08:11,415 INFO L137 encePairwiseOnDemand]: 377/380 looper letters, 36 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2022-11-25 18:08:11,415 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 38 transitions, 160 flow [2022-11-25 18:08:11,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:11,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 564 transitions. [2022-11-25 18:08:11,418 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49473684210526314 [2022-11-25 18:08:11,418 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 564 transitions. [2022-11-25 18:08:11,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 564 transitions. [2022-11-25 18:08:11,419 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:11,419 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 564 transitions. [2022-11-25 18:08:11,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 188.0) internal successors, (564), 3 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:11,424 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:11,425 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:11,426 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 86 flow. Second operand 3 states and 564 transitions. [2022-11-25 18:08:11,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 38 transitions, 160 flow [2022-11-25 18:08:11,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 156 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:11,427 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2022-11-25 18:08:11,428 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2022-11-25 18:08:11,429 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -9 predicate places. [2022-11-25 18:08:11,429 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2022-11-25 18:08:11,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.66666666666666) internal successors, (530), 3 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:11,430 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:11,431 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:08:11,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:11,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:11,644 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:11,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:11,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1332667478, now seen corresponding path program 1 times [2022-11-25 18:08:11,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:11,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2090676200] [2022-11-25 18:08:11,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:11,645 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:11,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:11,646 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:11,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2022-11-25 18:08:11,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:11,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:08:11,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:11,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:08:11,843 INFO L321 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2022-11-25 18:08:11,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 15 treesize of output 27 [2022-11-25 18:08:11,871 INFO L321 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2022-11-25 18:08:11,873 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2022-11-25 18:08:12,129 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 18:08:12,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:12,129 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:12,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2090676200] [2022-11-25 18:08:12,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2090676200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:12,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:12,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:08:12,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436063003] [2022-11-25 18:08:12,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:12,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:08:12,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:12,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:08:12,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:08:12,661 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 380 [2022-11-25 18:08:12,662 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:12,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:12,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 380 [2022-11-25 18:08:12,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:13,326 INFO L130 PetriNetUnfolder]: 840/1365 cut-off events. [2022-11-25 18:08:13,326 INFO L131 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2022-11-25 18:08:13,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2759 conditions, 1365 events. 840/1365 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5465 event pairs, 204 based on Foata normal form. 0/977 useless extension candidates. Maximal degree in co-relation 2755. Up to 979 conditions per place. [2022-11-25 18:08:13,334 INFO L137 encePairwiseOnDemand]: 374/380 looper letters, 69 selfloop transitions, 3 changer transitions 0/72 dead transitions. [2022-11-25 18:08:13,335 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 72 transitions, 302 flow [2022-11-25 18:08:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:08:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:08:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 772 transitions. [2022-11-25 18:08:13,338 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5078947368421053 [2022-11-25 18:08:13,338 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 772 transitions. [2022-11-25 18:08:13,338 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 772 transitions. [2022-11-25 18:08:13,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:13,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 772 transitions. [2022-11-25 18:08:13,341 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 193.0) internal successors, (772), 4 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:13,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:13,346 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:13,346 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 4 states and 772 transitions. [2022-11-25 18:08:13,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 72 transitions, 302 flow [2022-11-25 18:08:13,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 72 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:13,349 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 106 flow [2022-11-25 18:08:13,349 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=106, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2022-11-25 18:08:13,350 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -6 predicate places. [2022-11-25 18:08:13,350 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 106 flow [2022-11-25 18:08:13,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:13,351 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:13,351 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-25 18:08:13,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2022-11-25 18:08:13,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:13,565 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1332667477, now seen corresponding path program 1 times [2022-11-25 18:08:13,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:13,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [836006509] [2022-11-25 18:08:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:13,566 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:13,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:13,568 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:13,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2022-11-25 18:08:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:13,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 18:08:13,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:13,726 INFO L321 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2022-11-25 18:08:13,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 34 [2022-11-25 18:08:13,866 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 18:08:13,866 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:13,866 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:13,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [836006509] [2022-11-25 18:08:13,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [836006509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:13,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:13,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:08:13,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339334681] [2022-11-25 18:08:13,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:13,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:08:13,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:13,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:08:13,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:08:14,303 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 380 [2022-11-25 18:08:14,304 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:14,305 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:14,305 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 380 [2022-11-25 18:08:14,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:14,687 INFO L130 PetriNetUnfolder]: 770/1251 cut-off events. [2022-11-25 18:08:14,687 INFO L131 PetriNetUnfolder]: For 156/156 co-relation queries the response was YES. [2022-11-25 18:08:14,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2753 conditions, 1251 events. 770/1251 cut-off events. For 156/156 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4947 event pairs, 192 based on Foata normal form. 0/1049 useless extension candidates. Maximal degree in co-relation 2747. Up to 1109 conditions per place. [2022-11-25 18:08:14,696 INFO L137 encePairwiseOnDemand]: 376/380 looper letters, 51 selfloop transitions, 4 changer transitions 0/55 dead transitions. [2022-11-25 18:08:14,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 55 transitions, 249 flow [2022-11-25 18:08:14,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:08:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-25 18:08:14,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 751 transitions. [2022-11-25 18:08:14,700 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49407894736842106 [2022-11-25 18:08:14,700 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 751 transitions. [2022-11-25 18:08:14,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 751 transitions. [2022-11-25 18:08:14,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:14,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 751 transitions. [2022-11-25 18:08:14,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 187.75) internal successors, (751), 4 states have internal predecessors, (751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:14,707 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:14,708 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 380.0) internal successors, (1900), 5 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:14,708 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 106 flow. Second operand 4 states and 751 transitions. [2022-11-25 18:08:14,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 55 transitions, 249 flow [2022-11-25 18:08:14,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 55 transitions, 247 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:08:14,711 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 112 flow [2022-11-25 18:08:14,711 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=112, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2022-11-25 18:08:14,712 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -5 predicate places. [2022-11-25 18:08:14,712 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 112 flow [2022-11-25 18:08:14,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 175.5) internal successors, (702), 4 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:14,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:14,713 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:14,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:14,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:14,928 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:14,928 INFO L85 PathProgramCache]: Analyzing trace with hash 965408819, now seen corresponding path program 1 times [2022-11-25 18:08:14,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:14,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784421404] [2022-11-25 18:08:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:14,929 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:14,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:14,930 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:14,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2022-11-25 18:08:15,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:08:15,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:15,052 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 18:08:15,052 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:15,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:15,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784421404] [2022-11-25 18:08:15,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784421404] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:15,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:15,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:08:15,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109469594] [2022-11-25 18:08:15,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:15,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:15,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:15,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:15,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:15,063 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 380 [2022-11-25 18:08:15,064 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:15,065 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:15,065 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 380 [2022-11-25 18:08:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:15,366 INFO L130 PetriNetUnfolder]: 858/1409 cut-off events. [2022-11-25 18:08:15,367 INFO L131 PetriNetUnfolder]: For 253/253 co-relation queries the response was YES. [2022-11-25 18:08:15,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3091 conditions, 1409 events. 858/1409 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5892 event pairs, 401 based on Foata normal form. 66/1231 useless extension candidates. Maximal degree in co-relation 3085. Up to 878 conditions per place. [2022-11-25 18:08:15,376 INFO L137 encePairwiseOnDemand]: 375/380 looper letters, 61 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2022-11-25 18:08:15,377 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 64 transitions, 301 flow [2022-11-25 18:08:15,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:15,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-11-25 18:08:15,379 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5184210526315789 [2022-11-25 18:08:15,380 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-11-25 18:08:15,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-11-25 18:08:15,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:15,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-11-25 18:08:15,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:15,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:15,389 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:15,389 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 112 flow. Second operand 3 states and 591 transitions. [2022-11-25 18:08:15,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 64 transitions, 301 flow [2022-11-25 18:08:15,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 64 transitions, 295 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:15,392 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 131 flow [2022-11-25 18:08:15,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2022-11-25 18:08:15,395 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -3 predicate places. [2022-11-25 18:08:15,395 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 131 flow [2022-11-25 18:08:15,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:15,396 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:15,396 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:15,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:15,609 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:15,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash 2026009308, now seen corresponding path program 1 times [2022-11-25 18:08:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:15,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045935131] [2022-11-25 18:08:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:15,611 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:15,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:15,612 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:15,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2022-11-25 18:08:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:08:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:15,738 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 18:08:15,739 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:15,739 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:15,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045935131] [2022-11-25 18:08:15,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045935131] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:15,739 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:15,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:08:15,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702947137] [2022-11-25 18:08:15,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:15,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:15,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:15,753 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 380 [2022-11-25 18:08:15,754 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:15,754 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:15,754 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 380 [2022-11-25 18:08:15,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:16,086 INFO L130 PetriNetUnfolder]: 910/1493 cut-off events. [2022-11-25 18:08:16,087 INFO L131 PetriNetUnfolder]: For 416/416 co-relation queries the response was YES. [2022-11-25 18:08:16,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 1493 events. 910/1493 cut-off events. For 416/416 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 6404 event pairs, 662 based on Foata normal form. 40/1385 useless extension candidates. Maximal degree in co-relation 3499. Up to 1384 conditions per place. [2022-11-25 18:08:16,096 INFO L137 encePairwiseOnDemand]: 377/380 looper letters, 59 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2022-11-25 18:08:16,096 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 63 transitions, 320 flow [2022-11-25 18:08:16,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 585 transitions. [2022-11-25 18:08:16,099 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5131578947368421 [2022-11-25 18:08:16,099 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 585 transitions. [2022-11-25 18:08:16,099 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 585 transitions. [2022-11-25 18:08:16,100 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:16,100 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 585 transitions. [2022-11-25 18:08:16,101 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 195.0) internal successors, (585), 3 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,104 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,105 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 131 flow. Second operand 3 states and 585 transitions. [2022-11-25 18:08:16,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 63 transitions, 320 flow [2022-11-25 18:08:16,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 63 transitions, 310 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:16,112 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 151 flow [2022-11-25 18:08:16,112 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=151, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2022-11-25 18:08:16,113 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -2 predicate places. [2022-11-25 18:08:16,114 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 151 flow [2022-11-25 18:08:16,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:16,114 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:16,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:16,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:16,328 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:16,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1531332700, now seen corresponding path program 1 times [2022-11-25 18:08:16,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1434399895] [2022-11-25 18:08:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:16,329 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:16,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:16,331 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:16,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2022-11-25 18:08:16,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:08:16,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:16,460 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 18:08:16,460 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:16,460 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:16,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1434399895] [2022-11-25 18:08:16,461 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1434399895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:16,461 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:16,461 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:08:16,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687151728] [2022-11-25 18:08:16,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:16,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:16,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:16,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:16,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:16,475 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 380 [2022-11-25 18:08:16,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 151 flow. Second operand has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:16,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 380 [2022-11-25 18:08:16,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:16,848 INFO L130 PetriNetUnfolder]: 952/1555 cut-off events. [2022-11-25 18:08:16,848 INFO L131 PetriNetUnfolder]: For 412/412 co-relation queries the response was YES. [2022-11-25 18:08:16,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3818 conditions, 1555 events. 952/1555 cut-off events. For 412/412 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7147 event pairs, 376 based on Foata normal form. 12/1411 useless extension candidates. Maximal degree in co-relation 3810. Up to 1284 conditions per place. [2022-11-25 18:08:16,869 INFO L137 encePairwiseOnDemand]: 377/380 looper letters, 66 selfloop transitions, 2 changer transitions 0/68 dead transitions. [2022-11-25 18:08:16,869 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 68 transitions, 352 flow [2022-11-25 18:08:16,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:16,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:16,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 592 transitions. [2022-11-25 18:08:16,872 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.519298245614035 [2022-11-25 18:08:16,872 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 592 transitions. [2022-11-25 18:08:16,873 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 592 transitions. [2022-11-25 18:08:16,873 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:16,873 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 592 transitions. [2022-11-25 18:08:16,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.33333333333334) internal successors, (592), 3 states have internal predecessors, (592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,878 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,879 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,879 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 151 flow. Second operand 3 states and 592 transitions. [2022-11-25 18:08:16,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 68 transitions, 352 flow [2022-11-25 18:08:16,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 68 transitions, 345 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:16,884 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 154 flow [2022-11-25 18:08:16,885 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2022-11-25 18:08:16,886 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, -1 predicate places. [2022-11-25 18:08:16,886 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 154 flow [2022-11-25 18:08:16,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.33333333333334) internal successors, (541), 3 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:16,887 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:16,887 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:16,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:17,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:17,100 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:17,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:17,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1636106962, now seen corresponding path program 1 times [2022-11-25 18:08:17,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:17,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1628408557] [2022-11-25 18:08:17,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:17,101 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:17,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:17,102 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:17,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2022-11-25 18:08:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:08:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:17,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:17,334 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:17,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1628408557] [2022-11-25 18:08:17,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1628408557] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:17,335 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:08:17,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2022-11-25 18:08:17,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350721771] [2022-11-25 18:08:17,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:17,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:08:17,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:17,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:08:17,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:08:17,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 172 out of 380 [2022-11-25 18:08:17,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 154 flow. Second operand has 8 states, 8 states have (on average 175.375) internal successors, (1403), 8 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:17,405 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:17,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 172 of 380 [2022-11-25 18:08:17,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:19,010 INFO L130 PetriNetUnfolder]: 3215/5270 cut-off events. [2022-11-25 18:08:19,010 INFO L131 PetriNetUnfolder]: For 2026/2026 co-relation queries the response was YES. [2022-11-25 18:08:19,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13109 conditions, 5270 events. 3215/5270 cut-off events. For 2026/2026 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 28753 event pairs, 534 based on Foata normal form. 140/4848 useless extension candidates. Maximal degree in co-relation 13100. Up to 1230 conditions per place. [2022-11-25 18:08:19,043 INFO L137 encePairwiseOnDemand]: 372/380 looper letters, 240 selfloop transitions, 27 changer transitions 0/267 dead transitions. [2022-11-25 18:08:19,043 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 267 transitions, 1360 flow [2022-11-25 18:08:19,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 18:08:19,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-11-25 18:08:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 2314 transitions. [2022-11-25 18:08:19,051 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5074561403508772 [2022-11-25 18:08:19,051 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 2314 transitions. [2022-11-25 18:08:19,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 2314 transitions. [2022-11-25 18:08:19,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:19,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 2314 transitions. [2022-11-25 18:08:19,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 192.83333333333334) internal successors, (2314), 12 states have internal predecessors, (2314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:19,068 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 380.0) internal successors, (4940), 13 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:19,071 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 380.0) internal successors, (4940), 13 states have internal predecessors, (4940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:19,071 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 154 flow. Second operand 12 states and 2314 transitions. [2022-11-25 18:08:19,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 267 transitions, 1360 flow [2022-11-25 18:08:19,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 267 transitions, 1356 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:08:19,089 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 383 flow [2022-11-25 18:08:19,089 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=383, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2022-11-25 18:08:19,090 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 16 predicate places. [2022-11-25 18:08:19,090 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 383 flow [2022-11-25 18:08:19,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 175.375) internal successors, (1403), 8 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:19,091 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:19,091 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:19,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2022-11-25 18:08:19,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:19,304 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:19,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1636110269, now seen corresponding path program 1 times [2022-11-25 18:08:19,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:19,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377777466] [2022-11-25 18:08:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:19,305 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:19,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:19,306 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:19,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2022-11-25 18:08:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:19,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 18:08:19,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:19,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:08:19,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:08:19,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-25 18:08:19,490 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 19 [2022-11-25 18:08:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:19,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:08:20,298 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:20,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377777466] [2022-11-25 18:08:20,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377777466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:20,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:08:20,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2022-11-25 18:08:20,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262542337] [2022-11-25 18:08:20,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:20,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 18:08:20,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:20,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 18:08:20,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:08:22,604 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 380 [2022-11-25 18:08:22,607 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 383 flow. Second operand has 10 states, 10 states have (on average 170.8) internal successors, (1708), 10 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:22,607 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:22,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 380 [2022-11-25 18:08:22,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:26,623 INFO L130 PetriNetUnfolder]: 4725/7774 cut-off events. [2022-11-25 18:08:26,624 INFO L131 PetriNetUnfolder]: For 7765/7765 co-relation queries the response was YES. [2022-11-25 18:08:26,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21793 conditions, 7774 events. 4725/7774 cut-off events. For 7765/7765 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 45123 event pairs, 1351 based on Foata normal form. 80/7028 useless extension candidates. Maximal degree in co-relation 21778. Up to 5020 conditions per place. [2022-11-25 18:08:26,689 INFO L137 encePairwiseOnDemand]: 374/380 looper letters, 215 selfloop transitions, 18 changer transitions 0/233 dead transitions. [2022-11-25 18:08:26,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 233 transitions, 1446 flow [2022-11-25 18:08:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 18:08:26,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-25 18:08:26,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 2033 transitions. [2022-11-25 18:08:26,698 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2022-11-25 18:08:26,699 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 2033 transitions. [2022-11-25 18:08:26,699 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 2033 transitions. [2022-11-25 18:08:26,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:26,701 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 2033 transitions. [2022-11-25 18:08:26,706 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 184.8181818181818) internal successors, (2033), 11 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 380.0) internal successors, (4560), 12 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,716 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 380.0) internal successors, (4560), 12 states have internal predecessors, (4560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,717 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 383 flow. Second operand 11 states and 2033 transitions. [2022-11-25 18:08:26,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 233 transitions, 1446 flow [2022-11-25 18:08:26,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 233 transitions, 1442 flow, removed 2 selfloop flow, removed 0 redundant places. [2022-11-25 18:08:26,760 INFO L231 Difference]: Finished difference. Result has 81 places, 88 transitions, 574 flow [2022-11-25 18:08:26,760 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=381, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=574, PETRI_PLACES=81, PETRI_TRANSITIONS=88} [2022-11-25 18:08:26,761 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 33 predicate places. [2022-11-25 18:08:26,762 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 88 transitions, 574 flow [2022-11-25 18:08:26,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 170.8) internal successors, (1708), 10 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:26,763 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:26,763 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:26,783 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2022-11-25 18:08:26,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:26,981 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:26,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1165891405, now seen corresponding path program 1 times [2022-11-25 18:08:26,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:26,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791031881] [2022-11-25 18:08:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:26,982 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:26,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:26,984 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:27,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2022-11-25 18:08:27,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:08:27,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:27,123 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2022-11-25 18:08:27,131 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 18:08:27,131 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:27,131 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:27,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791031881] [2022-11-25 18:08:27,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791031881] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:27,132 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:27,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:08:27,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398861267] [2022-11-25 18:08:27,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:27,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:27,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:27,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:27,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:27,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 380 [2022-11-25 18:08:27,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 88 transitions, 574 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,160 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:27,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 380 [2022-11-25 18:08:27,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:27,720 INFO L130 PetriNetUnfolder]: 1330/2477 cut-off events. [2022-11-25 18:08:27,721 INFO L131 PetriNetUnfolder]: For 3117/3117 co-relation queries the response was YES. [2022-11-25 18:08:27,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7172 conditions, 2477 events. 1330/2477 cut-off events. For 3117/3117 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 12716 event pairs, 235 based on Foata normal form. 304/2651 useless extension candidates. Maximal degree in co-relation 7149. Up to 1925 conditions per place. [2022-11-25 18:08:27,744 INFO L137 encePairwiseOnDemand]: 374/380 looper letters, 66 selfloop transitions, 10 changer transitions 0/76 dead transitions. [2022-11-25 18:08:27,744 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 76 transitions, 581 flow [2022-11-25 18:08:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:27,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:27,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 571 transitions. [2022-11-25 18:08:27,748 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5008771929824561 [2022-11-25 18:08:27,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 571 transitions. [2022-11-25 18:08:27,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 571 transitions. [2022-11-25 18:08:27,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:27,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 571 transitions. [2022-11-25 18:08:27,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 190.33333333333334) internal successors, (571), 3 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,755 INFO L175 Difference]: Start difference. First operand has 81 places, 88 transitions, 574 flow. Second operand 3 states and 571 transitions. [2022-11-25 18:08:27,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 76 transitions, 581 flow [2022-11-25 18:08:27,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 558 flow, removed 7 selfloop flow, removed 5 redundant places. [2022-11-25 18:08:27,771 INFO L231 Difference]: Finished difference. Result has 74 places, 67 transitions, 402 flow [2022-11-25 18:08:27,772 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=402, PETRI_PLACES=74, PETRI_TRANSITIONS=67} [2022-11-25 18:08:27,772 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 26 predicate places. [2022-11-25 18:08:27,773 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 67 transitions, 402 flow [2022-11-25 18:08:27,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:27,773 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:27,773 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:27,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:27,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:27,987 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:27,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:27,988 INFO L85 PathProgramCache]: Analyzing trace with hash -969271588, now seen corresponding path program 1 times [2022-11-25 18:08:27,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:27,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [169364012] [2022-11-25 18:08:27,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:27,989 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:27,989 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:27,990 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:27,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2022-11-25 18:08:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:28,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:08:28,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:28,530 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 18:08:28,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:28,530 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:28,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [169364012] [2022-11-25 18:08:28,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [169364012] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:28,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:28,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-25 18:08:28,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889362789] [2022-11-25 18:08:28,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:28,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-25 18:08:28,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:28,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-25 18:08:28,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:08:30,957 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 162 out of 380 [2022-11-25 18:08:30,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 67 transitions, 402 flow. Second operand has 11 states, 11 states have (on average 163.72727272727272) internal successors, (1801), 11 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 18:08:30,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:30,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 162 of 380 [2022-11-25 18:08:30,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:33,116 INFO L130 PetriNetUnfolder]: 1820/3417 cut-off events. [2022-11-25 18:08:33,117 INFO L131 PetriNetUnfolder]: For 2650/2650 co-relation queries the response was YES. [2022-11-25 18:08:33,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10015 conditions, 3417 events. 1820/3417 cut-off events. For 2650/2650 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 18634 event pairs, 533 based on Foata normal form. 44/3443 useless extension candidates. Maximal degree in co-relation 9994. Up to 2058 conditions per place. [2022-11-25 18:08:33,144 INFO L137 encePairwiseOnDemand]: 368/380 looper letters, 157 selfloop transitions, 19 changer transitions 1/177 dead transitions. [2022-11-25 18:08:33,145 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 177 transitions, 1180 flow [2022-11-25 18:08:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:08:33,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:08:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2254 transitions. [2022-11-25 18:08:33,152 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4562753036437247 [2022-11-25 18:08:33,152 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2254 transitions. [2022-11-25 18:08:33,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2254 transitions. [2022-11-25 18:08:33,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:33,155 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2254 transitions. [2022-11-25 18:08:33,160 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 173.3846153846154) internal successors, (2254), 13 states have internal predecessors, (2254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:33,168 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 380.0) internal successors, (5320), 14 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:33,170 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 380.0) internal successors, (5320), 14 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:33,170 INFO L175 Difference]: Start difference. First operand has 74 places, 67 transitions, 402 flow. Second operand 13 states and 2254 transitions. [2022-11-25 18:08:33,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 177 transitions, 1180 flow [2022-11-25 18:08:33,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 177 transitions, 1145 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-11-25 18:08:33,187 INFO L231 Difference]: Finished difference. Result has 93 places, 80 transitions, 576 flow [2022-11-25 18:08:33,188 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=576, PETRI_PLACES=93, PETRI_TRANSITIONS=80} [2022-11-25 18:08:33,189 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 45 predicate places. [2022-11-25 18:08:33,189 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 80 transitions, 576 flow [2022-11-25 18:08:33,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 163.72727272727272) internal successors, (1801), 11 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 18:08:33,190 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:33,190 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:33,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:33,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:33,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:33,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:33,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1110563947, now seen corresponding path program 1 times [2022-11-25 18:08:33,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:33,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1400328300] [2022-11-25 18:08:33,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:33,405 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:33,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:33,406 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:33,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2022-11-25 18:08:33,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:33,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-25 18:08:33,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:33,600 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 18:08:33,600 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:33,601 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:33,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1400328300] [2022-11-25 18:08:33,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1400328300] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:33,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:33,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:08:33,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180832656] [2022-11-25 18:08:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:33,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:08:33,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:33,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:08:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:08:33,949 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 170 out of 380 [2022-11-25 18:08:33,950 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 80 transitions, 576 flow. Second operand has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:33,950 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:33,950 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 170 of 380 [2022-11-25 18:08:33,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:34,779 INFO L130 PetriNetUnfolder]: 2164/4029 cut-off events. [2022-11-25 18:08:34,779 INFO L131 PetriNetUnfolder]: For 4809/4809 co-relation queries the response was YES. [2022-11-25 18:08:34,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12367 conditions, 4029 events. 2164/4029 cut-off events. For 4809/4809 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 22524 event pairs, 593 based on Foata normal form. 0/3999 useless extension candidates. Maximal degree in co-relation 12337. Up to 2452 conditions per place. [2022-11-25 18:08:34,814 INFO L137 encePairwiseOnDemand]: 374/380 looper letters, 111 selfloop transitions, 9 changer transitions 1/121 dead transitions. [2022-11-25 18:08:34,815 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 121 transitions, 1040 flow [2022-11-25 18:08:34,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:08:34,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:08:34,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1089 transitions. [2022-11-25 18:08:34,819 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4776315789473684 [2022-11-25 18:08:34,819 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1089 transitions. [2022-11-25 18:08:34,819 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1089 transitions. [2022-11-25 18:08:34,820 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:34,820 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1089 transitions. [2022-11-25 18:08:34,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 181.5) internal successors, (1089), 6 states have internal predecessors, (1089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:34,826 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:34,827 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:34,828 INFO L175 Difference]: Start difference. First operand has 93 places, 80 transitions, 576 flow. Second operand 6 states and 1089 transitions. [2022-11-25 18:08:34,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 121 transitions, 1040 flow [2022-11-25 18:08:34,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 121 transitions, 1016 flow, removed 9 selfloop flow, removed 3 redundant places. [2022-11-25 18:08:34,853 INFO L231 Difference]: Finished difference. Result has 95 places, 84 transitions, 623 flow [2022-11-25 18:08:34,854 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=623, PETRI_PLACES=95, PETRI_TRANSITIONS=84} [2022-11-25 18:08:34,854 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 47 predicate places. [2022-11-25 18:08:34,854 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 84 transitions, 623 flow [2022-11-25 18:08:34,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 173.8) internal successors, (869), 5 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:34,855 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:34,855 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:34,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:35,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:35,069 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:35,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:35,069 INFO L85 PathProgramCache]: Analyzing trace with hash -809370881, now seen corresponding path program 1 times [2022-11-25 18:08:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:35,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [699857846] [2022-11-25 18:08:35,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:35,072 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:35,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2022-11-25 18:08:35,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:35,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:08:35,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 18:08:35,295 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:35,295 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:35,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [699857846] [2022-11-25 18:08:35,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [699857846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:35,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:35,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:08:35,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698335946] [2022-11-25 18:08:35,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:35,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:08:35,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:35,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:08:35,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:08:35,310 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 176 out of 380 [2022-11-25 18:08:35,311 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 84 transitions, 623 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 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 18:08:35,312 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:35,312 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 176 of 380 [2022-11-25 18:08:35,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:36,257 INFO L130 PetriNetUnfolder]: 2513/4696 cut-off events. [2022-11-25 18:08:36,257 INFO L131 PetriNetUnfolder]: For 6783/6783 co-relation queries the response was YES. [2022-11-25 18:08:36,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14695 conditions, 4696 events. 2513/4696 cut-off events. For 6783/6783 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 27830 event pairs, 1726 based on Foata normal form. 112/4754 useless extension candidates. Maximal degree in co-relation 14663. Up to 3976 conditions per place. [2022-11-25 18:08:36,301 INFO L137 encePairwiseOnDemand]: 376/380 looper letters, 134 selfloop transitions, 3 changer transitions 0/137 dead transitions. [2022-11-25 18:08:36,301 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 137 transitions, 1266 flow [2022-11-25 18:08:36,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:08:36,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-25 18:08:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 593 transitions. [2022-11-25 18:08:36,304 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5201754385964912 [2022-11-25 18:08:36,304 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 593 transitions. [2022-11-25 18:08:36,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 593 transitions. [2022-11-25 18:08:36,305 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:36,305 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 593 transitions. [2022-11-25 18:08:36,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.66666666666666) internal successors, (593), 3 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:36,310 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:36,310 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 380.0) internal successors, (1520), 4 states have internal predecessors, (1520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:36,311 INFO L175 Difference]: Start difference. First operand has 95 places, 84 transitions, 623 flow. Second operand 3 states and 593 transitions. [2022-11-25 18:08:36,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 137 transitions, 1266 flow [2022-11-25 18:08:36,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 137 transitions, 1262 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:36,345 INFO L231 Difference]: Finished difference. Result has 96 places, 86 transitions, 641 flow [2022-11-25 18:08:36,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=620, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=641, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2022-11-25 18:08:36,346 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 48 predicate places. [2022-11-25 18:08:36,346 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 641 flow [2022-11-25 18:08:36,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 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 18:08:36,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:36,347 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:36,367 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:36,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:36,561 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:36,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:36,561 INFO L85 PathProgramCache]: Analyzing trace with hash 537891801, now seen corresponding path program 1 times [2022-11-25 18:08:36,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:36,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1517935782] [2022-11-25 18:08:36,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:36,562 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:36,564 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:36,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2022-11-25 18:08:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:36,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 18:08:36,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:36,970 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:08:37,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 18:08:37,341 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 18:08:37,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:37,342 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:37,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1517935782] [2022-11-25 18:08:37,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1517935782] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:37,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:37,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-11-25 18:08:37,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694841026] [2022-11-25 18:08:37,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:37,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 18:08:37,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:37,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 18:08:37,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:08:39,868 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 380 [2022-11-25 18:08:39,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 641 flow. Second operand has 14 states, 14 states have (on average 152.5) internal successors, (2135), 14 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:39,871 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:39,871 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 380 [2022-11-25 18:08:39,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:43,274 INFO L130 PetriNetUnfolder]: 3100/5818 cut-off events. [2022-11-25 18:08:43,275 INFO L131 PetriNetUnfolder]: For 8402/8402 co-relation queries the response was YES. [2022-11-25 18:08:43,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19167 conditions, 5818 events. 3100/5818 cut-off events. For 8402/8402 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 35734 event pairs, 1022 based on Foata normal form. 12/5830 useless extension candidates. Maximal degree in co-relation 19134. Up to 4431 conditions per place. [2022-11-25 18:08:43,315 INFO L137 encePairwiseOnDemand]: 365/380 looper letters, 186 selfloop transitions, 36 changer transitions 1/223 dead transitions. [2022-11-25 18:08:43,316 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 223 transitions, 1714 flow [2022-11-25 18:08:43,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-25 18:08:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2022-11-25 18:08:43,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 3335 transitions. [2022-11-25 18:08:43,326 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.41791979949874686 [2022-11-25 18:08:43,326 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 3335 transitions. [2022-11-25 18:08:43,326 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 3335 transitions. [2022-11-25 18:08:43,329 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:43,329 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 3335 transitions. [2022-11-25 18:08:43,336 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 158.8095238095238) internal successors, (3335), 21 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,348 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 380.0) internal successors, (8360), 22 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,351 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 380.0) internal successors, (8360), 22 states have internal predecessors, (8360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,351 INFO L175 Difference]: Start difference. First operand has 96 places, 86 transitions, 641 flow. Second operand 21 states and 3335 transitions. [2022-11-25 18:08:43,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 223 transitions, 1714 flow [2022-11-25 18:08:43,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 223 transitions, 1701 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-25 18:08:43,392 INFO L231 Difference]: Finished difference. Result has 129 places, 118 transitions, 1011 flow [2022-11-25 18:08:43,392 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1011, PETRI_PLACES=129, PETRI_TRANSITIONS=118} [2022-11-25 18:08:43,393 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 81 predicate places. [2022-11-25 18:08:43,393 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 118 transitions, 1011 flow [2022-11-25 18:08:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 152.5) internal successors, (2135), 14 states have internal predecessors, (2135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:43,394 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:43,394 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:43,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:43,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:43,613 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:43,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:43,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1446097393, now seen corresponding path program 2 times [2022-11-25 18:08:43,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:43,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [615033200] [2022-11-25 18:08:43,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:08:43,614 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:43,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:43,616 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:43,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2022-11-25 18:08:43,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-25 18:08:43,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2022-11-25 18:08:43,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:43,845 INFO L321 Elim1Store]: treesize reduction 17, result has 45.2 percent of original size [2022-11-25 18:08:43,845 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 38 [2022-11-25 18:08:44,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:08:44,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2022-11-25 18:08:44,513 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 18:08:44,549 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 18:08:44,549 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:44,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [615033200] [2022-11-25 18:08:44,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [615033200] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:44,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:44,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 18:08:44,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578190987] [2022-11-25 18:08:44,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:44,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:08:44,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:08:44,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:08:47,556 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 380 [2022-11-25 18:08:47,558 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 118 transitions, 1011 flow. Second operand has 15 states, 15 states have (on average 149.4) internal successors, (2241), 15 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:47,558 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:47,559 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 380 [2022-11-25 18:08:47,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:50,362 INFO L130 PetriNetUnfolder]: 3593/6752 cut-off events. [2022-11-25 18:08:50,362 INFO L131 PetriNetUnfolder]: For 12467/12467 co-relation queries the response was YES. [2022-11-25 18:08:50,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23884 conditions, 6752 events. 3593/6752 cut-off events. For 12467/12467 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 42412 event pairs, 1307 based on Foata normal form. 6/6758 useless extension candidates. Maximal degree in co-relation 23837. Up to 5303 conditions per place. [2022-11-25 18:08:50,421 INFO L137 encePairwiseOnDemand]: 365/380 looper letters, 184 selfloop transitions, 28 changer transitions 1/213 dead transitions. [2022-11-25 18:08:50,422 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 213 transitions, 1910 flow [2022-11-25 18:08:50,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 18:08:50,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2022-11-25 18:08:50,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 2053 transitions. [2022-11-25 18:08:50,428 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.415587044534413 [2022-11-25 18:08:50,428 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 2053 transitions. [2022-11-25 18:08:50,429 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 2053 transitions. [2022-11-25 18:08:50,430 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:50,430 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 2053 transitions. [2022-11-25 18:08:50,435 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 157.92307692307693) internal successors, (2053), 13 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 380.0) internal successors, (5320), 14 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,444 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 380.0) internal successors, (5320), 14 states have internal predecessors, (5320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,444 INFO L175 Difference]: Start difference. First operand has 129 places, 118 transitions, 1011 flow. Second operand 13 states and 2053 transitions. [2022-11-25 18:08:50,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 213 transitions, 1910 flow [2022-11-25 18:08:50,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 213 transitions, 1891 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-25 18:08:50,520 INFO L231 Difference]: Finished difference. Result has 145 places, 130 transitions, 1208 flow [2022-11-25 18:08:50,521 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1208, PETRI_PLACES=145, PETRI_TRANSITIONS=130} [2022-11-25 18:08:50,521 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 97 predicate places. [2022-11-25 18:08:50,522 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 130 transitions, 1208 flow [2022-11-25 18:08:50,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 149.4) internal successors, (2241), 15 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:50,523 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:50,523 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:50,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:08:50,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:50,740 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:50,740 INFO L85 PathProgramCache]: Analyzing trace with hash -146173823, now seen corresponding path program 3 times [2022-11-25 18:08:50,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:50,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80759604] [2022-11-25 18:08:50,741 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:08:50,741 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:50,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:50,742 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:50,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2022-11-25 18:08:50,880 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2022-11-25 18:08:50,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:08:50,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-25 18:08:50,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:50,924 INFO L321 Elim1Store]: treesize reduction 22, result has 29.0 percent of original size [2022-11-25 18:08:50,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 24 [2022-11-25 18:08:51,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-11-25 18:08:51,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-11-25 18:08:51,561 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 18:08:51,588 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 18:08:51,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:08:51,588 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:51,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80759604] [2022-11-25 18:08:51,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80759604] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:08:51,589 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:08:51,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-11-25 18:08:51,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984824753] [2022-11-25 18:08:51,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:08:51,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 18:08:51,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:51,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 18:08:51,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:08:54,489 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 380 [2022-11-25 18:08:54,490 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 130 transitions, 1208 flow. Second operand has 15 states, 15 states have (on average 149.4) internal successors, (2241), 15 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:54,491 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:54,491 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 380 [2022-11-25 18:08:54,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:08:58,147 INFO L130 PetriNetUnfolder]: 3581/6728 cut-off events. [2022-11-25 18:08:58,148 INFO L131 PetriNetUnfolder]: For 14474/14474 co-relation queries the response was YES. [2022-11-25 18:08:58,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24653 conditions, 6728 events. 3581/6728 cut-off events. For 14474/14474 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 42026 event pairs, 929 based on Foata normal form. 12/6740 useless extension candidates. Maximal degree in co-relation 24599. Up to 3327 conditions per place. [2022-11-25 18:08:58,204 INFO L137 encePairwiseOnDemand]: 365/380 looper letters, 172 selfloop transitions, 63 changer transitions 1/236 dead transitions. [2022-11-25 18:08:58,204 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 236 transitions, 2180 flow [2022-11-25 18:08:58,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-25 18:08:58,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-25 18:08:58,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 3113 transitions. [2022-11-25 18:08:58,211 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.40960526315789475 [2022-11-25 18:08:58,211 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 3113 transitions. [2022-11-25 18:08:58,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 3113 transitions. [2022-11-25 18:08:58,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:08:58,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 3113 transitions. [2022-11-25 18:08:58,219 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 155.65) internal successors, (3113), 20 states have internal predecessors, (3113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,233 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 380.0) internal successors, (7980), 21 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,237 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 380.0) internal successors, (7980), 21 states have internal predecessors, (7980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,237 INFO L175 Difference]: Start difference. First operand has 145 places, 130 transitions, 1208 flow. Second operand 20 states and 3113 transitions. [2022-11-25 18:08:58,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 236 transitions, 2180 flow [2022-11-25 18:08:58,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 236 transitions, 2146 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-25 18:08:58,337 INFO L231 Difference]: Finished difference. Result has 164 places, 141 transitions, 1474 flow [2022-11-25 18:08:58,337 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1474, PETRI_PLACES=164, PETRI_TRANSITIONS=141} [2022-11-25 18:08:58,338 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 116 predicate places. [2022-11-25 18:08:58,338 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 141 transitions, 1474 flow [2022-11-25 18:08:58,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 149.4) internal successors, (2241), 15 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,339 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:08:58,339 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:08:58,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Ended with exit code 0 [2022-11-25 18:08:58,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:58,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:08:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:08:58,557 INFO L85 PathProgramCache]: Analyzing trace with hash -830871213, now seen corresponding path program 1 times [2022-11-25 18:08:58,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:08:58,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [366990076] [2022-11-25 18:08:58,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:08:58,558 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:08:58,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:08:58,559 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:08:58,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2022-11-25 18:08:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:08:58,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:08:58,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:08:58,711 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 18:08:58,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:08:58,741 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 18:08:58,741 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2022-11-25 18:08:58,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [366990076] [2022-11-25 18:08:58,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleMathsat [366990076] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:08:58,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:08:58,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2022-11-25 18:08:58,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355940870] [2022-11-25 18:08:58,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:08:58,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:08:58,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2022-11-25 18:08:58,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:08:58,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:08:58,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 175 out of 380 [2022-11-25 18:08:58,773 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 141 transitions, 1474 flow. Second operand has 6 states, 6 states have (on average 179.5) internal successors, (1077), 6 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:08:58,773 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-25 18:08:58,773 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 175 of 380 [2022-11-25 18:08:58,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-25 18:09:01,788 INFO L130 PetriNetUnfolder]: 6831/13006 cut-off events. [2022-11-25 18:09:01,788 INFO L131 PetriNetUnfolder]: For 38844/38844 co-relation queries the response was YES. [2022-11-25 18:09:01,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49963 conditions, 13006 events. 6831/13006 cut-off events. For 38844/38844 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 96183 event pairs, 2215 based on Foata normal form. 1904/14910 useless extension candidates. Maximal degree in co-relation 49903. Up to 3932 conditions per place. [2022-11-25 18:09:01,922 INFO L137 encePairwiseOnDemand]: 374/380 looper letters, 450 selfloop transitions, 24 changer transitions 0/474 dead transitions. [2022-11-25 18:09:01,922 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 474 transitions, 5795 flow [2022-11-25 18:09:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:09:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-25 18:09:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1191 transitions. [2022-11-25 18:09:01,925 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5223684210526316 [2022-11-25 18:09:01,925 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1191 transitions. [2022-11-25 18:09:01,926 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1191 transitions. [2022-11-25 18:09:01,926 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-25 18:09:01,927 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1191 transitions. [2022-11-25 18:09:01,929 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 198.5) internal successors, (1191), 6 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:01,933 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:01,934 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 380.0) internal successors, (2660), 7 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:01,934 INFO L175 Difference]: Start difference. First operand has 164 places, 141 transitions, 1474 flow. Second operand 6 states and 1191 transitions. [2022-11-25 18:09:01,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 474 transitions, 5795 flow [2022-11-25 18:09:02,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 474 transitions, 5437 flow, removed 82 selfloop flow, removed 11 redundant places. [2022-11-25 18:09:02,116 INFO L231 Difference]: Finished difference. Result has 162 places, 154 transitions, 1592 flow [2022-11-25 18:09:02,116 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=380, PETRI_DIFFERENCE_MINUEND_FLOW=1367, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1592, PETRI_PLACES=162, PETRI_TRANSITIONS=154} [2022-11-25 18:09:02,117 INFO L288 CegarLoopForPetriNet]: 48 programPoint places, 114 predicate places. [2022-11-25 18:09:02,117 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 154 transitions, 1592 flow [2022-11-25 18:09:02,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 179.5) internal successors, (1077), 6 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:09:02,117 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-25 18:09:02,118 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:02,131 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:02,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:09:02,329 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 20 more)] === [2022-11-25 18:09:02,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:09:02,329 INFO L85 PathProgramCache]: Analyzing trace with hash -187147403, now seen corresponding path program 1 times [2022-11-25 18:09:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2022-11-25 18:09:02,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1894697211] [2022-11-25 18:09:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:09:02,330 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:09:02,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat [2022-11-25 18:09:02,331 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2022-11-25 18:09:02,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2022-11-25 18:09:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:02,486 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-25 18:09:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-25 18:09:02,624 INFO L130 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2022-11-25 18:09:02,624 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-11-25 18:09:02,625 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (22 of 23 remaining) [2022-11-25 18:09:02,627 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (21 of 23 remaining) [2022-11-25 18:09:02,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (20 of 23 remaining) [2022-11-25 18:09:02,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (19 of 23 remaining) [2022-11-25 18:09:02,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 23 remaining) [2022-11-25 18:09:02,628 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 23 remaining) [2022-11-25 18:09:02,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 23 remaining) [2022-11-25 18:09:02,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 23 remaining) [2022-11-25 18:09:02,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 23 remaining) [2022-11-25 18:09:02,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK (13 of 23 remaining) [2022-11-25 18:09:02,629 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (12 of 23 remaining) [2022-11-25 18:09:02,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (11 of 23 remaining) [2022-11-25 18:09:02,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 23 remaining) [2022-11-25 18:09:02,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 23 remaining) [2022-11-25 18:09:02,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (8 of 23 remaining) [2022-11-25 18:09:02,630 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err2ASSERT_VIOLATIONMEMORY_LEAK (7 of 23 remaining) [2022-11-25 18:09:02,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 23 remaining) [2022-11-25 18:09:02,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 23 remaining) [2022-11-25 18:09:02,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 23 remaining) [2022-11-25 18:09:02,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 23 remaining) [2022-11-25 18:09:02,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t1Err2ASSERT_VIOLATIONMEMORY_LEAK (2 of 23 remaining) [2022-11-25 18:09:02,631 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 23 remaining) [2022-11-25 18:09:02,632 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 23 remaining) [2022-11-25 18:09:02,663 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:09:02,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2022-11-25 18:09:02,839 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:09:02,846 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-25 18:09:02,846 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-25 18:09:02,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.11 06:09:02 BasicIcfg [2022-11-25 18:09:02,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-25 18:09:02,951 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-25 18:09:02,951 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-25 18:09:02,952 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-25 18:09:02,952 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:07:48" (3/4) ... [2022-11-25 18:09:02,955 INFO L140 WitnessPrinter]: No result that supports witness generation found [2022-11-25 18:09:02,956 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-25 18:09:02,957 INFO L158 Benchmark]: Toolchain (without parser) took 76654.31ms. Allocated memory was 81.8MB in the beginning and 941.6MB in the end (delta: 859.8MB). Free memory was 58.1MB in the beginning and 557.1MB in the end (delta: -499.0MB). Peak memory consumption was 361.0MB. Max. memory is 16.1GB. [2022-11-25 18:09:02,957 INFO L158 Benchmark]: CDTParser took 0.79ms. Allocated memory is still 65.0MB. Free memory is still 43.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:09:02,957 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1047.42ms. Allocated memory is still 81.8MB. Free memory was 57.9MB in the beginning and 46.7MB in the end (delta: 11.1MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. [2022-11-25 18:09:02,958 INFO L158 Benchmark]: Boogie Procedure Inliner took 96.54ms. Allocated memory is still 81.8MB. Free memory was 46.7MB in the beginning and 44.0MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-25 18:09:02,958 INFO L158 Benchmark]: Boogie Preprocessor took 78.22ms. Allocated memory is still 81.8MB. Free memory was 44.0MB in the beginning and 41.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-25 18:09:02,958 INFO L158 Benchmark]: RCFGBuilder took 895.84ms. Allocated memory is still 81.8MB. Free memory was 41.8MB in the beginning and 47.0MB in the end (delta: -5.1MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. [2022-11-25 18:09:02,959 INFO L158 Benchmark]: TraceAbstraction took 74521.17ms. Allocated memory was 81.8MB in the beginning and 941.6MB in the end (delta: 859.8MB). Free memory was 46.1MB in the beginning and 557.1MB in the end (delta: -511.0MB). Peak memory consumption was 348.4MB. Max. memory is 16.1GB. [2022-11-25 18:09:02,959 INFO L158 Benchmark]: Witness Printer took 4.97ms. Allocated memory is still 941.6MB. Free memory is still 557.1MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-25 18:09:02,965 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.79ms. Allocated memory is still 65.0MB. Free memory is still 43.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1047.42ms. Allocated memory is still 81.8MB. Free memory was 57.9MB in the beginning and 46.7MB in the end (delta: 11.1MB). Peak memory consumption was 22.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 96.54ms. Allocated memory is still 81.8MB. Free memory was 46.7MB in the beginning and 44.0MB in the end (delta: 2.8MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 78.22ms. Allocated memory is still 81.8MB. Free memory was 44.0MB in the beginning and 41.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 895.84ms. Allocated memory is still 81.8MB. Free memory was 41.8MB in the beginning and 47.0MB in the end (delta: -5.1MB). Peak memory consumption was 9.1MB. Max. memory is 16.1GB. * TraceAbstraction took 74521.17ms. Allocated memory was 81.8MB in the beginning and 941.6MB in the end (delta: 859.8MB). Free memory was 46.1MB in the beginning and 557.1MB in the end (delta: -511.0MB). Peak memory consumption was 348.4MB. Max. memory is 16.1GB. * Witness Printer took 4.97ms. Allocated memory is still 941.6MB. Free memory is still 557.1MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 18.0s, 181 PlacesBefore, 48 PlacesAfterwards, 184 TransitionsBefore, 46 TransitionsAfterwards, 10398 CoEnabledTransitionPairs, 6 FixpointIterations, 43 TrivialSequentialCompositions, 119 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 22 ConcurrentYvCompositions, 5 ChoiceCompositions, 189 TotalNumberOfCompositions, 14851 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 11433, independent: 11233, independent conditional: 0, independent unconditional: 11233, dependent: 200, dependent conditional: 0, dependent unconditional: 200, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 7398, independent: 7323, independent conditional: 0, independent unconditional: 7323, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 7398, independent: 7301, independent conditional: 0, independent unconditional: 7301, dependent: 97, dependent conditional: 0, dependent unconditional: 97, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 97, independent: 22, independent conditional: 0, independent unconditional: 22, dependent: 75, dependent conditional: 0, dependent unconditional: 75, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 610, independent: 63, independent conditional: 0, independent unconditional: 63, dependent: 548, dependent conditional: 0, dependent unconditional: 548, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 11433, independent: 3910, independent conditional: 0, independent unconditional: 3910, dependent: 125, dependent conditional: 0, dependent unconditional: 125, unknown: 7398, unknown conditional: 0, unknown unconditional: 7398] , Statistics on independence cache: Total cache size (in pairs): 406, Positive cache size: 377, Positive conditional cache size: 0, Positive unconditional cache size: 377, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 940. Possible FailurePath: [L935] 0 static int top=0; [L936] 0 static unsigned int arr[(400)]; [L937] 0 pthread_mutex_t m; [L938] 0 _Bool flag=(0); [L1019] 0 pthread_t id1, id2; [L1021] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id1, ((void *)0), t1, ((void *)0))=-1, top=0] [L988] 1 int i; [L989] 1 unsigned int tmp; [L990] 1 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=0, i=0, m={4:0}, top=0] [L1022] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arr={3:0}, flag=0, id1={7:0}, id2={5:0}, m={4:0}, pthread_create(&id2, ((void *)0), t2, ((void *)0))=0, top=0] [L990] COND TRUE 1 i<(400) [L993] 1 tmp = __VERIFIER_nondet_uint() [L994] CALL 1 assume_abort_if_not(tmp < (400)) [L23] COND FALSE 1 !(!cond) [L994] RET 1 assume_abort_if_not(tmp < (400)) [L995] CALL, EXPR 1 push(arr,tmp) [L960] COND FALSE 1 !(top==(400)) VAL [\old(x)=0, arr={3:0}, flag=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=0] [L967] CALL, EXPR 1 get_top() [L952] 1 return top; VAL [\result=0, arr={3:0}, flag=0, m={4:0}, top=0] [L967] RET, EXPR 1 get_top() [L967] 1 stack[get_top()] = x VAL [\old(x)=0, arr={3:0}, flag=0, get_top()=0, m={4:0}, stack={3:0}, stack={3:0}, top=0, x=0] [L968] CALL 1 inc_top() [L944] 1 top++ [L968] RET 1 inc_top() [L970] 1 return 0; [L995] RET, EXPR 1 push(arr,tmp) [L995] COND FALSE 1 !(push(arr,tmp)==(-1)) [L997] 1 flag=(1) VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, tmp=0, top=1] [L990] 1 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, tmp=0, top=1] [L1004] 2 int i; [L1005] 2 i=0 VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=0, m={4:0}, top=1] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND FALSE 2 !(get_top()==0) [L981] CALL 2 dec_top() [L948] 2 top-- [L981] RET 2 dec_top() [L982] CALL, EXPR 2 get_top() [L952] 2 return top; [L982] RET, EXPR 2 get_top() [L982] EXPR 2 stack[get_top()] [L982] 2 return stack[get_top()]; [L1010] RET, EXPR 2 pop(arr) [L1010] COND FALSE 2 !(!(pop(arr)!=(-2))) [L1005] 2 i++ VAL [arg={0:0}, arg={0:0}, arr={3:0}, flag=1, i=1, m={4:0}, top=0] [L1005] COND TRUE 2 i<(400) [L1008] COND TRUE 2 \read(flag) [L1010] CALL, EXPR 2 pop(arr) [L974] CALL, EXPR 2 get_top() [L952] 2 return top; [L974] RET, EXPR 2 get_top() [L974] COND TRUE 2 get_top()==0 [L977] 2 return (-2); [L1010] RET, EXPR 2 pop(arr) [L1010] COND TRUE 2 !(pop(arr)!=(-2)) [L1011] CALL 2 error() [L940] 2 reach_error() VAL [arr={3:0}, flag=1, m={4:0}, top=0] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 1022]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 1021]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 940]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 299 locations, 23 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 74.1s, OverallIterations: 21, TraceHistogramMax: 2, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 43.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 18.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 4258 SdHoareTripleChecker+Valid, 27.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3516 mSDsluCounter, 4849 SdHoareTripleChecker+Invalid, 23.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4730 mSDsCounter, 192 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 16458 IncrementalHoareTripleChecker+Invalid, 16650 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 192 mSolverCounterUnsat, 119 mSDtfsCounter, 16458 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 343 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 5.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1592occurred in iteration=20, InterpolantAutomatonStates: 139, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 4.6s InterpolantComputationTime, 275 NumberOfCodeBlocks, 275 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 279 ConstructedInterpolants, 10 QuantifiedInterpolants, 2362 SizeOfPredicates, 115 NumberOfNonLiveVariables, 1977 ConjunctsInSsa, 207 ConjunctsInUnsatCore, 23 InterpolantComputations, 17 PerfectInterpolantSequences, 5/17 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2022-11-25 18:09:03,003 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9254f9fb-96fb-4d98-8104-ad3a794b29f4/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample