./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/pthread/fib_unsafe-6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/pthread/fib_unsafe-6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --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 854e371c98b43d805c328b457758892c4a501d7b326c2672c089850792494a4b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:54:02,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:54:02,476 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-19 07:54:02,488 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:54:02,489 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:54:02,527 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:54:02,527 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:54:02,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:54:02,529 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:54:02,534 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:54:02,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:54:02,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:54:02,538 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:54:02,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:54:02,541 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:54:02,541 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:54:02,542 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:54:02,542 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:54:02,542 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 07:54:02,543 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 07:54:02,544 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 07:54:02,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:54:02,545 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-19 07:54:02,545 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:54:02,545 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:54:02,546 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:54:02,547 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:54:02,547 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:54:02,547 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:54:02,548 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:02,549 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:54:02,549 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:54:02,550 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:54:02,550 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:54:02,550 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:54:02,550 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:54:02,551 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:54:02,551 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:54:02,551 INFO L153 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_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 854e371c98b43d805c328b457758892c4a501d7b326c2672c089850792494a4b [2023-11-19 07:54:02,894 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:54:02,927 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:54:02,930 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:54:02,931 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:54:02,932 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:54:02,934 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread/fib_unsafe-6.i [2023-11-19 07:54:05,992 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:54:06,330 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:54:06,331 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/sv-benchmarks/c/pthread/fib_unsafe-6.i [2023-11-19 07:54:06,359 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/data/bdc435c25/bf730e54cc534c769a00a14288780e5d/FLAGcccf6f875 [2023-11-19 07:54:06,378 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/data/bdc435c25/bf730e54cc534c769a00a14288780e5d [2023-11-19 07:54:06,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:54:06,387 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:54:06,390 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:06,391 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:54:06,395 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:54:06,396 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:06,397 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e8aff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06, skipping insertion in model container [2023-11-19 07:54:06,397 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:06,453 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:54:06,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:06,849 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:54:06,919 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:54:06,962 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:06,963 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:54:06,971 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:54:06,971 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06 WrapperNode [2023-11-19 07:54:06,972 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:54:06,973 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:06,973 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:54:06,973 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:54:06,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,049 INFO L138 Inliner]: procedures = 165, calls = 29, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 78 [2023-11-19 07:54:07,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:54:07,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:54:07,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:54:07,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:54:07,061 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,061 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,085 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,089 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,103 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,106 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:54:07,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:54:07,113 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:54:07,113 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:54:07,114 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (1/1) ... [2023-11-19 07:54:07,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:54:07,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:07,153 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:54:07,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:54:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2023-11-19 07:54:07,188 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2023-11-19 07:54:07,188 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2023-11-19 07:54:07,188 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2023-11-19 07:54:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:54:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:54:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:54:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:54:07,189 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:54:07,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:54:07,190 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:54:07,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:54:07,190 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:54:07,192 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:54:07,327 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:54:07,329 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:54:07,528 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:54:07,538 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:54:07,539 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-19 07:54:07,543 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:07 BoogieIcfgContainer [2023-11-19 07:54:07,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:54:07,546 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:54:07,546 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:54:07,549 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:54:07,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:54:06" (1/3) ... [2023-11-19 07:54:07,550 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7489d54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:07, skipping insertion in model container [2023-11-19 07:54:07,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:54:06" (2/3) ... [2023-11-19 07:54:07,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7489d54d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:54:07, skipping insertion in model container [2023-11-19 07:54:07,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:54:07" (3/3) ... [2023-11-19 07:54:07,553 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_unsafe-6.i [2023-11-19 07:54:07,571 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:54:07,571 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-11-19 07:54:07,571 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:54:07,642 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:54:07,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 110 transitions, 228 flow [2023-11-19 07:54:07,757 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-19 07:54:07,757 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:07,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-11-19 07:54:07,765 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 110 transitions, 228 flow [2023-11-19 07:54:07,770 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 107 places, 108 transitions, 222 flow [2023-11-19 07:54:07,774 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:54:07,784 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 107 places, 108 transitions, 222 flow [2023-11-19 07:54:07,787 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 107 places, 108 transitions, 222 flow [2023-11-19 07:54:07,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 107 places, 108 transitions, 222 flow [2023-11-19 07:54:07,818 INFO L124 PetriNetUnfolderBase]: 8/108 cut-off events. [2023-11-19 07:54:07,819 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:07,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115 conditions, 108 events. 8/108 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 101 event pairs, 0 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 80. Up to 2 conditions per place. [2023-11-19 07:54:07,823 INFO L119 LiptonReduction]: Number of co-enabled transitions 2530 [2023-11-19 07:54:12,326 INFO L134 LiptonReduction]: Checked pairs total: 1884 [2023-11-19 07:54:12,327 INFO L136 LiptonReduction]: Total number of compositions: 119 [2023-11-19 07:54:12,344 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:54:12,351 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;@381ab8eb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:54:12,352 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-19 07:54:12,354 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:54:12,354 INFO L124 PetriNetUnfolderBase]: 0/1 cut-off events. [2023-11-19 07:54:12,354 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:12,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:12,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1] [2023-11-19 07:54:12,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:12,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:12,361 INFO L85 PathProgramCache]: Analyzing trace with hash 428, now seen corresponding path program 1 times [2023-11-19 07:54:12,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:12,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46302637] [2023-11-19 07:54:12,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:12,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:12,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:12,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46302637] [2023-11-19 07:54:12,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46302637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:12,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:12,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2023-11-19 07:54:12,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969165744] [2023-11-19 07:54:12,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:12,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:54:12,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:12,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:54:12,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:54:12,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 229 [2023-11-19 07:54:12,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:12,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:12,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 229 [2023-11-19 07:54:12,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:12,640 INFO L124 PetriNetUnfolderBase]: 103/161 cut-off events. [2023-11-19 07:54:12,641 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:54:12,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 334 conditions, 161 events. 103/161 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 400 event pairs, 60 based on Foata normal form. 0/94 useless extension candidates. Maximal degree in co-relation 324. Up to 162 conditions per place. [2023-11-19 07:54:12,646 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 16 selfloop transitions, 0 changer transitions 1/17 dead transitions. [2023-11-19 07:54:12,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 17 transitions, 74 flow [2023-11-19 07:54:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:54:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:54:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 223 transitions. [2023-11-19 07:54:12,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4868995633187773 [2023-11-19 07:54:12,666 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 223 transitions. [2023-11-19 07:54:12,666 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 223 transitions. [2023-11-19 07:54:12,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:12,671 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 223 transitions. [2023-11-19 07:54:12,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 111.5) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:12,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:12,685 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:12,687 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 2 states and 223 transitions. [2023-11-19 07:54:12,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 17 transitions, 74 flow [2023-11-19 07:54:12,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 17 transitions, 72 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:12,692 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 36 flow [2023-11-19 07:54:12,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=36, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-11-19 07:54:12,698 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-19 07:54:12,698 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 36 flow [2023-11-19 07:54:12,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 102.5) internal successors, (205), 2 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:12,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:12,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:54:12,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:54:12,700 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:12,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash 419435, now seen corresponding path program 1 times [2023-11-19 07:54:12,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:12,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639681182] [2023-11-19 07:54:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:12,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:12,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:12,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:12,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639681182] [2023-11-19 07:54:12,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639681182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:12,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:12,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:12,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021507896] [2023-11-19 07:54:12,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:12,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:12,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:12,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:12,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:12,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:54:12,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:12,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:12,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:54:12,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:13,044 INFO L124 PetriNetUnfolderBase]: 82/128 cut-off events. [2023-11-19 07:54:13,044 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:54:13,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267 conditions, 128 events. 82/128 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 287 event pairs, 34 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 264. Up to 101 conditions per place. [2023-11-19 07:54:13,046 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-19 07:54:13,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 20 places, 21 transitions, 88 flow [2023-11-19 07:54:13,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:13,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:13,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 313 transitions. [2023-11-19 07:54:13,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4556040756914119 [2023-11-19 07:54:13,050 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 313 transitions. [2023-11-19 07:54:13,051 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 313 transitions. [2023-11-19 07:54:13,051 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:13,051 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 313 transitions. [2023-11-19 07:54:13,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 104.33333333333333) internal successors, (313), 3 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,056 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,056 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 36 flow. Second operand 3 states and 313 transitions. [2023-11-19 07:54:13,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 20 places, 21 transitions, 88 flow [2023-11-19 07:54:13,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 20 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:13,058 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 38 flow [2023-11-19 07:54:13,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=38, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-11-19 07:54:13,059 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-19 07:54:13,059 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 38 flow [2023-11-19 07:54:13,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:13,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2023-11-19 07:54:13,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:54:13,061 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:13,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:13,061 INFO L85 PathProgramCache]: Analyzing trace with hash 419434, now seen corresponding path program 1 times [2023-11-19 07:54:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:13,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994017390] [2023-11-19 07:54:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:13,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:13,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:13,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994017390] [2023-11-19 07:54:13,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994017390] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:13,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:13,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:13,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390210431] [2023-11-19 07:54:13,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:13,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:13,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:13,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:13,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:13,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 229 [2023-11-19 07:54:13,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 38 flow. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:13,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 229 [2023-11-19 07:54:13,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:13,216 INFO L124 PetriNetUnfolderBase]: 79/122 cut-off events. [2023-11-19 07:54:13,216 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:54:13,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266 conditions, 122 events. 79/122 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 267 event pairs, 32 based on Foata normal form. 0/87 useless extension candidates. Maximal degree in co-relation 262. Up to 95 conditions per place. [2023-11-19 07:54:13,218 INFO L140 encePairwiseOnDemand]: 226/229 looper letters, 18 selfloop transitions, 2 changer transitions 0/20 dead transitions. [2023-11-19 07:54:13,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 20 transitions, 88 flow [2023-11-19 07:54:13,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:13,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:13,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 303 transitions. [2023-11-19 07:54:13,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4410480349344978 [2023-11-19 07:54:13,222 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 303 transitions. [2023-11-19 07:54:13,222 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 303 transitions. [2023-11-19 07:54:13,222 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:13,223 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 303 transitions. [2023-11-19 07:54:13,224 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 101.0) internal successors, (303), 3 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,227 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,228 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,228 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 38 flow. Second operand 3 states and 303 transitions. [2023-11-19 07:54:13,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 20 transitions, 88 flow [2023-11-19 07:54:13,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 20 transitions, 84 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:13,229 INFO L231 Difference]: Finished difference. Result has 19 places, 14 transitions, 36 flow [2023-11-19 07:54:13,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=36, PETRI_PLACES=19, PETRI_TRANSITIONS=14} [2023-11-19 07:54:13,230 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -4 predicate places. [2023-11-19 07:54:13,231 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 14 transitions, 36 flow [2023-11-19 07:54:13,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:13,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-19 07:54:13,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:54:13,232 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:13,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:13,233 INFO L85 PathProgramCache]: Analyzing trace with hash -389203972, now seen corresponding path program 1 times [2023-11-19 07:54:13,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:13,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072982662] [2023-11-19 07:54:13,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:13,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:13,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:13,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072982662] [2023-11-19 07:54:13,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072982662] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:13,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:13,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:54:13,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791942185] [2023-11-19 07:54:13,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:13,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:13,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:13,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:13,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:13,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 229 [2023-11-19 07:54:13,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 14 transitions, 36 flow. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:13,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 229 [2023-11-19 07:54:13,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:13,415 INFO L124 PetriNetUnfolderBase]: 97/149 cut-off events. [2023-11-19 07:54:13,415 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:54:13,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 320 conditions, 149 events. 97/149 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 333 event pairs, 20 based on Foata normal form. 9/117 useless extension candidates. Maximal degree in co-relation 316. Up to 91 conditions per place. [2023-11-19 07:54:13,417 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 19 selfloop transitions, 2 changer transitions 0/21 dead transitions. [2023-11-19 07:54:13,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 21 places, 21 transitions, 92 flow [2023-11-19 07:54:13,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:13,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 317 transitions. [2023-11-19 07:54:13,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46142649199417757 [2023-11-19 07:54:13,420 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 317 transitions. [2023-11-19 07:54:13,421 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 317 transitions. [2023-11-19 07:54:13,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:13,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 317 transitions. [2023-11-19 07:54:13,423 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,425 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,426 INFO L175 Difference]: Start difference. First operand has 19 places, 14 transitions, 36 flow. Second operand 3 states and 317 transitions. [2023-11-19 07:54:13,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 21 places, 21 transitions, 92 flow [2023-11-19 07:54:13,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 88 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-11-19 07:54:13,428 INFO L231 Difference]: Finished difference. Result has 20 places, 15 transitions, 46 flow [2023-11-19 07:54:13,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=32, PETRI_DIFFERENCE_MINUEND_PLACES=17, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=14, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=46, PETRI_PLACES=20, PETRI_TRANSITIONS=15} [2023-11-19 07:54:13,429 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, -3 predicate places. [2023-11-19 07:54:13,430 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 15 transitions, 46 flow [2023-11-19 07:54:13,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:13,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:13,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:54:13,431 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:13,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 819579052, now seen corresponding path program 1 times [2023-11-19 07:54:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:13,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670833984] [2023-11-19 07:54:13,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:13,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:13,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:13,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670833984] [2023-11-19 07:54:13,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670833984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:13,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804962216] [2023-11-19 07:54:13,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:13,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:13,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:13,516 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:13,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:54:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:13,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:54:13,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:13,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:13,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804962216] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:13,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:13,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2023-11-19 07:54:13,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414601428] [2023-11-19 07:54:13,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:13,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:54:13,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:13,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:54:13,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:54:13,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:54:13,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 46 flow. Second operand has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:13,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:54:13,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:13,880 INFO L124 PetriNetUnfolderBase]: 151/230 cut-off events. [2023-11-19 07:54:13,880 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-11-19 07:54:13,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 546 conditions, 230 events. 151/230 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 536 event pairs, 20 based on Foata normal form. 0/162 useless extension candidates. Maximal degree in co-relation 541. Up to 91 conditions per place. [2023-11-19 07:54:13,885 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 37 selfloop transitions, 5 changer transitions 0/42 dead transitions. [2023-11-19 07:54:13,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 42 transitions, 190 flow [2023-11-19 07:54:13,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:54:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:54:13,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 630 transitions. [2023-11-19 07:54:13,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585152838427948 [2023-11-19 07:54:13,891 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 630 transitions. [2023-11-19 07:54:13,891 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 630 transitions. [2023-11-19 07:54:13,891 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:13,892 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 630 transitions. [2023-11-19 07:54:13,894 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 105.0) internal successors, (630), 6 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,898 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,899 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 229.0) internal successors, (1603), 7 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,899 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 46 flow. Second operand 6 states and 630 transitions. [2023-11-19 07:54:13,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 42 transitions, 190 flow [2023-11-19 07:54:13,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:13,902 INFO L231 Difference]: Finished difference. Result has 27 places, 18 transitions, 86 flow [2023-11-19 07:54:13,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=86, PETRI_PLACES=27, PETRI_TRANSITIONS=18} [2023-11-19 07:54:13,905 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 4 predicate places. [2023-11-19 07:54:13,906 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 18 transitions, 86 flow [2023-11-19 07:54:13,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 98.71428571428571) internal successors, (691), 7 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:13,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:13,907 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:13,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:14,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:14,120 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:14,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:14,121 INFO L85 PathProgramCache]: Analyzing trace with hash -809245700, now seen corresponding path program 2 times [2023-11-19 07:54:14,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:14,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042787847] [2023-11-19 07:54:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:14,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:14,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:14,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:14,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042787847] [2023-11-19 07:54:14,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042787847] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:14,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623511771] [2023-11-19 07:54:14,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:54:14,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:14,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:14,281 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:14,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:54:14,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:54:14,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:14,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:54:14,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:14,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:14,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:14,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623511771] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:14,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:14,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-11-19 07:54:14,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221723010] [2023-11-19 07:54:14,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:14,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:54:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:14,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:54:14,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:54:14,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:54:14,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 18 transitions, 86 flow. Second operand has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:14,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:14,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:54:14,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:14,753 INFO L124 PetriNetUnfolderBase]: 259/392 cut-off events. [2023-11-19 07:54:14,753 INFO L125 PetriNetUnfolderBase]: For 216/216 co-relation queries the response was YES. [2023-11-19 07:54:14,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1099 conditions, 392 events. 259/392 cut-off events. For 216/216 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 929 event pairs, 20 based on Foata normal form. 54/351 useless extension candidates. Maximal degree in co-relation 1091. Up to 118 conditions per place. [2023-11-19 07:54:14,758 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 73 selfloop transitions, 11 changer transitions 0/84 dead transitions. [2023-11-19 07:54:14,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 84 transitions, 410 flow [2023-11-19 07:54:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 07:54:14,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-11-19 07:54:14,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1260 transitions. [2023-11-19 07:54:14,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585152838427948 [2023-11-19 07:54:14,764 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1260 transitions. [2023-11-19 07:54:14,764 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1260 transitions. [2023-11-19 07:54:14,765 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:14,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1260 transitions. [2023-11-19 07:54:14,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 105.0) internal successors, (1260), 12 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:14,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:14,777 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 229.0) internal successors, (2977), 13 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:14,777 INFO L175 Difference]: Start difference. First operand has 27 places, 18 transitions, 86 flow. Second operand 12 states and 1260 transitions. [2023-11-19 07:54:14,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 84 transitions, 410 flow [2023-11-19 07:54:14,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 84 transitions, 396 flow, removed 6 selfloop flow, removed 1 redundant places. [2023-11-19 07:54:14,784 INFO L231 Difference]: Finished difference. Result has 43 places, 24 transitions, 168 flow [2023-11-19 07:54:14,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=168, PETRI_PLACES=43, PETRI_TRANSITIONS=24} [2023-11-19 07:54:14,787 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 20 predicate places. [2023-11-19 07:54:14,787 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 24 transitions, 168 flow [2023-11-19 07:54:14,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.38461538461539) internal successors, (1279), 13 states have internal predecessors, (1279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:14,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:14,788 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:14,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:15,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:15,009 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:15,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash -190798340, now seen corresponding path program 3 times [2023-11-19 07:54:15,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:15,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097461835] [2023-11-19 07:54:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:15,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:15,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:15,223 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:15,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:15,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097461835] [2023-11-19 07:54:15,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097461835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:15,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386919515] [2023-11-19 07:54:15,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:54:15,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:15,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:15,226 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:15,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:54:15,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-19 07:54:15,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:15,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:54:15,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:15,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:15,528 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:15,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386919515] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:15,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:15,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 16 [2023-11-19 07:54:15,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779661930] [2023-11-19 07:54:15,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:15,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:54:15,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:54:15,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:54:15,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 229 [2023-11-19 07:54:15,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 24 transitions, 168 flow. Second operand has 17 states, 17 states have (on average 98.3529411764706) internal successors, (1672), 17 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:15,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:15,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 229 [2023-11-19 07:54:15,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:15,828 INFO L124 PetriNetUnfolderBase]: 331/500 cut-off events. [2023-11-19 07:54:15,828 INFO L125 PetriNetUnfolderBase]: For 1620/1620 co-relation queries the response was YES. [2023-11-19 07:54:15,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1637 conditions, 500 events. 331/500 cut-off events. For 1620/1620 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1197 event pairs, 20 based on Foata normal form. 36/417 useless extension candidates. Maximal degree in co-relation 1622. Up to 127 conditions per place. [2023-11-19 07:54:15,835 INFO L140 encePairwiseOnDemand]: 225/229 looper letters, 97 selfloop transitions, 15 changer transitions 0/112 dead transitions. [2023-11-19 07:54:15,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 112 transitions, 592 flow [2023-11-19 07:54:15,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:54:15,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:54:15,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1672 transitions. [2023-11-19 07:54:15,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45633187772925765 [2023-11-19 07:54:15,842 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1672 transitions. [2023-11-19 07:54:15,842 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1672 transitions. [2023-11-19 07:54:15,843 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:15,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1672 transitions. [2023-11-19 07:54:15,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 104.5) internal successors, (1672), 16 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:15,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:15,857 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 229.0) internal successors, (3893), 17 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:15,857 INFO L175 Difference]: Start difference. First operand has 43 places, 24 transitions, 168 flow. Second operand 16 states and 1672 transitions. [2023-11-19 07:54:15,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 112 transitions, 592 flow [2023-11-19 07:54:15,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 112 transitions, 536 flow, removed 23 selfloop flow, removed 5 redundant places. [2023-11-19 07:54:15,866 INFO L231 Difference]: Finished difference. Result has 57 places, 28 transitions, 200 flow [2023-11-19 07:54:15,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=200, PETRI_PLACES=57, PETRI_TRANSITIONS=28} [2023-11-19 07:54:15,866 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 34 predicate places. [2023-11-19 07:54:15,867 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 28 transitions, 200 flow [2023-11-19 07:54:15,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 98.3529411764706) internal successors, (1672), 17 states have internal predecessors, (1672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:15,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:15,868 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:15,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-19 07:54:16,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:16,090 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:16,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:16,090 INFO L85 PathProgramCache]: Analyzing trace with hash -936357380, now seen corresponding path program 4 times [2023-11-19 07:54:16,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:16,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98954318] [2023-11-19 07:54:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:16,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:17,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:17,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98954318] [2023-11-19 07:54:17,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98954318] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:17,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616713961] [2023-11-19 07:54:17,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:54:17,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:17,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:17,424 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:17,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:54:17,532 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:54:17,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:54:17,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-19 07:54:17,538 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:54:18,218 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 78 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:18,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:54:19,235 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:19,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616713961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:54:19,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:54:19,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 45 [2023-11-19 07:54:19,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820009911] [2023-11-19 07:54:19,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:54:19,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-19 07:54:19,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:19,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-19 07:54:19,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1759, Unknown=0, NotChecked=0, Total=2162 [2023-11-19 07:54:20,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 229 [2023-11-19 07:54:20,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 28 transitions, 200 flow. Second operand has 47 states, 47 states have (on average 93.27659574468085) internal successors, (4384), 47 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:20,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:20,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 229 [2023-11-19 07:54:20,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:42,598 INFO L124 PetriNetUnfolderBase]: 21405/32281 cut-off events. [2023-11-19 07:54:42,598 INFO L125 PetriNetUnfolderBase]: For 101453/101453 co-relation queries the response was YES. [2023-11-19 07:54:42,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114137 conditions, 32281 events. 21405/32281 cut-off events. For 101453/101453 co-relation queries the response was YES. Maximal size of possible extension queue 955. Compared 213343 event pairs, 66 based on Foata normal form. 0/23355 useless extension candidates. Maximal degree in co-relation 114118. Up to 6800 conditions per place. [2023-11-19 07:54:43,030 INFO L140 encePairwiseOnDemand]: 223/229 looper letters, 996 selfloop transitions, 1596 changer transitions 0/2592 dead transitions. [2023-11-19 07:54:43,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 2592 transitions, 22643 flow [2023-11-19 07:54:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2023-11-19 07:54:43,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2023-11-19 07:54:43,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 21064 transitions. [2023-11-19 07:54:43,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43593617417579006 [2023-11-19 07:54:43,102 INFO L72 ComplementDD]: Start complementDD. Operand 211 states and 21064 transitions. [2023-11-19 07:54:43,102 INFO L73 IsDeterministic]: Start isDeterministic. Operand 211 states and 21064 transitions. [2023-11-19 07:54:43,116 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:43,116 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 211 states and 21064 transitions. [2023-11-19 07:54:43,174 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 212 states, 211 states have (on average 99.82938388625593) internal successors, (21064), 211 states have internal predecessors, (21064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:43,273 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 212 states, 212 states have (on average 229.0) internal successors, (48548), 212 states have internal predecessors, (48548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:43,295 INFO L81 ComplementDD]: Finished complementDD. Result has 212 states, 212 states have (on average 229.0) internal successors, (48548), 212 states have internal predecessors, (48548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:43,295 INFO L175 Difference]: Start difference. First operand has 57 places, 28 transitions, 200 flow. Second operand 211 states and 21064 transitions. [2023-11-19 07:54:43,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 2592 transitions, 22643 flow [2023-11-19 07:54:43,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 2592 transitions, 18697 flow, removed 1435 selfloop flow, removed 11 redundant places. [2023-11-19 07:54:43,943 INFO L231 Difference]: Finished difference. Result has 274 places, 1639 transitions, 12611 flow [2023-11-19 07:54:43,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=211, PETRI_FLOW=12611, PETRI_PLACES=274, PETRI_TRANSITIONS=1639} [2023-11-19 07:54:43,944 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 251 predicate places. [2023-11-19 07:54:43,944 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 1639 transitions, 12611 flow [2023-11-19 07:54:43,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 93.27659574468085) internal successors, (4384), 47 states have internal predecessors, (4384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:43,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:43,946 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:43,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:54:44,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:44,167 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:44,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash -936357370, now seen corresponding path program 1 times [2023-11-19 07:54:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:44,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563546618] [2023-11-19 07:54:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:44,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:44,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-11-19 07:54:44,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:44,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563546618] [2023-11-19 07:54:44,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563546618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:54:44,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:54:44,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:54:44,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869290325] [2023-11-19 07:54:44,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:54:44,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:54:44,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:54:44,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:54:44,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:54:44,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 229 [2023-11-19 07:54:44,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 1639 transitions, 12611 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:44,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:54:44,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 229 [2023-11-19 07:54:44,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:54:51,854 INFO L124 PetriNetUnfolderBase]: 19235/28862 cut-off events. [2023-11-19 07:54:51,855 INFO L125 PetriNetUnfolderBase]: For 502819/502819 co-relation queries the response was YES. [2023-11-19 07:54:51,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110203 conditions, 28862 events. 19235/28862 cut-off events. For 502819/502819 co-relation queries the response was YES. Maximal size of possible extension queue 899. Compared 189308 event pairs, 7740 based on Foata normal form. 913/29775 useless extension candidates. Maximal degree in co-relation 110166. Up to 28862 conditions per place. [2023-11-19 07:54:52,106 INFO L140 encePairwiseOnDemand]: 227/229 looper letters, 1375 selfloop transitions, 1 changer transitions 0/1376 dead transitions. [2023-11-19 07:54:52,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 1376 transitions, 11075 flow [2023-11-19 07:54:52,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:54:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:54:52,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-11-19 07:54:52,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43522561863173215 [2023-11-19 07:54:52,109 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-11-19 07:54:52,109 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-11-19 07:54:52,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:54:52,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-11-19 07:54:52,112 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:52,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:52,115 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:52,115 INFO L175 Difference]: Start difference. First operand has 274 places, 1639 transitions, 12611 flow. Second operand 3 states and 299 transitions. [2023-11-19 07:54:52,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 1376 transitions, 11075 flow [2023-11-19 07:54:55,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 1376 transitions, 10951 flow, removed 62 selfloop flow, removed 0 redundant places. [2023-11-19 07:54:55,266 INFO L231 Difference]: Finished difference. Result has 201 places, 1376 transitions, 8201 flow [2023-11-19 07:54:55,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=8199, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=8201, PETRI_PLACES=201, PETRI_TRANSITIONS=1376} [2023-11-19 07:54:55,268 INFO L281 CegarLoopForPetriNet]: 23 programPoint places, 178 predicate places. [2023-11-19 07:54:55,268 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 1376 transitions, 8201 flow [2023-11-19 07:54:55,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:54:55,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:54:55,269 INFO L208 CegarLoopForPetriNet]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:54:55,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-19 07:54:55,269 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-19 07:54:55,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:54:55,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1163123291, now seen corresponding path program 1 times [2023-11-19 07:54:55,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:54:55,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652038443] [2023-11-19 07:54:55,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:55,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:54:55,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:54:56,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:54:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652038443] [2023-11-19 07:54:56,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652038443] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:54:56,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774975474] [2023-11-19 07:54:56,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:54:56,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:54:56,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:54:56,498 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:54:56,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fc72c74d-71ce-49ee-8e17-865b563cc7de/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:54:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:54:56,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 55 conjunts are in the unsatisfiable core [2023-11-19 07:54:56,615 INFO L285 TraceCheckSpWp]: Computing forward predicates...