./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1-pthread.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows 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_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/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_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/25_stack_longest-1-pthread.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3e10ed02255b37a861fcd919e1a26aad90b67620d926f632b070967147a10b69 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:49:49,371 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:49:49,534 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Overflow-32bit-Automizer_Default.epf [2023-11-19 07:49:49,542 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:49:49,543 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:49:49,584 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:49:49,585 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:49:49,585 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:49:49,587 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:49:49,587 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:49:49,588 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:49:49,589 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:49:49,590 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:49:49,591 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:49:49,591 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:49:49,592 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:49:49,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:49:49,593 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:49:49,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:49:49,595 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:49:49,595 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:49:49,596 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:49:49,596 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 07:49:49,597 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 07:49:49,597 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:49:49,598 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:49:49,598 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:49:49,599 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:49:49,599 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:49:49,600 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:49:49,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:49,601 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:49:49,601 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:49:49,602 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:49:49,602 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:49:49,603 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:49:49,603 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:49:49,604 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:49:49,604 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:49:49,605 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:49:49,605 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:49:49,606 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_ad196291-b8c3-426c-b9e6-64b6d765b6e5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e10ed02255b37a861fcd919e1a26aad90b67620d926f632b070967147a10b69 [2023-11-19 07:49:49,937 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:49:49,978 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:49:49,981 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:49:49,983 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:49:49,984 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:49:49,986 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/pthread-ext/25_stack_longest-1-pthread.i [2023-11-19 07:49:53,076 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:49:53,575 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:49:53,575 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/sv-benchmarks/c/pthread-ext/25_stack_longest-1-pthread.i [2023-11-19 07:49:53,595 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/data/a885f673b/0f62784afcdc4329860172dcccb22c9e/FLAG91ae2828f [2023-11-19 07:49:53,614 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/data/a885f673b/0f62784afcdc4329860172dcccb22c9e [2023-11-19 07:49:53,617 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:49:53,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:49:53,621 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:53,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:49:53,628 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:49:53,629 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:53" (1/1) ... [2023-11-19 07:49:53,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@734e3cac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:53, skipping insertion in model container [2023-11-19 07:49:53,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:49:53" (1/1) ... [2023-11-19 07:49:53,690 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:49:54,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:54,246 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:49:54,328 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:49:54,373 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:49:54,373 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:49:54,384 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:49:54,385 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54 WrapperNode [2023-11-19 07:49:54,385 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:49:54,386 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:54,387 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:49:54,387 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:49:54,397 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,416 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,455 INFO L138 Inliner]: procedures = 171, calls = 35, calls flagged for inlining = 10, calls inlined = 9, statements flattened = 135 [2023-11-19 07:49:54,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:49:54,458 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:49:54,459 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:49:54,459 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:49:54,472 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,482 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,483 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,492 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,498 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,501 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,503 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,508 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:49:54,510 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:49:54,510 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:49:54,510 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:49:54,512 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (1/1) ... [2023-11-19 07:49:54,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:49:54,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:49:54,563 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:49:54,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ad196291-b8c3-426c-b9e6-64b6d765b6e5/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:49:54,615 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2023-11-19 07:49:54,616 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2023-11-19 07:49:54,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:49:54,616 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2023-11-19 07:49:54,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:49:54,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:49:54,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:49:54,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:49:54,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:49:54,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:49:54,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:49:54,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:49:54,623 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 07:49:54,787 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:49:54,790 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:49:55,107 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:49:55,241 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:49:55,242 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:49:55,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:55 BoogieIcfgContainer [2023-11-19 07:49:55,248 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:49:55,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:49:55,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:49:55,256 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:49:55,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:49:53" (1/3) ... [2023-11-19 07:49:55,257 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3bdd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:55, skipping insertion in model container [2023-11-19 07:49:55,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:49:54" (2/3) ... [2023-11-19 07:49:55,258 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3bdd9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:49:55, skipping insertion in model container [2023-11-19 07:49:55,258 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:49:55" (3/3) ... [2023-11-19 07:49:55,260 INFO L112 eAbstractionObserver]: Analyzing ICFG 25_stack_longest-1-pthread.i [2023-11-19 07:49:55,279 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:49:55,297 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:49:55,298 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-11-19 07:49:55,299 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:49:55,435 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:49:55,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 262 flow [2023-11-19 07:49:55,604 INFO L124 PetriNetUnfolderBase]: 8/140 cut-off events. [2023-11-19 07:49:55,605 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:55,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 140 events. 8/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 132 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 100. Up to 4 conditions per place. [2023-11-19 07:49:55,614 INFO L82 GeneralOperation]: Start removeDead. Operand has 125 places, 129 transitions, 262 flow [2023-11-19 07:49:55,621 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 125 places, 129 transitions, 262 flow [2023-11-19 07:49:55,626 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:49:55,640 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 129 transitions, 262 flow [2023-11-19 07:49:55,644 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 129 transitions, 262 flow [2023-11-19 07:49:55,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 129 transitions, 262 flow [2023-11-19 07:49:55,697 INFO L124 PetriNetUnfolderBase]: 8/140 cut-off events. [2023-11-19 07:49:55,697 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:49:55,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 140 events. 8/140 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 132 event pairs, 0 based on Foata normal form. 0/120 useless extension candidates. Maximal degree in co-relation 100. Up to 4 conditions per place. [2023-11-19 07:49:55,703 INFO L119 LiptonReduction]: Number of co-enabled transitions 2436 [2023-11-19 07:50:03,750 INFO L134 LiptonReduction]: Checked pairs total: 2284 [2023-11-19 07:50:03,750 INFO L136 LiptonReduction]: Total number of compositions: 156 [2023-11-19 07:50:03,767 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:03,774 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@6ab9668a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:03,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2023-11-19 07:50:03,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:03,780 INFO L124 PetriNetUnfolderBase]: 2/11 cut-off events. [2023-11-19 07:50:03,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:03,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:03,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:03,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-19 07:50:03,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:03,787 INFO L85 PathProgramCache]: Analyzing trace with hash 602145000, now seen corresponding path program 1 times [2023-11-19 07:50:03,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:03,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973328725] [2023-11-19 07:50:03,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:03,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:03,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:04,074 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 07:50:04,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:04,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973328725] [2023-11-19 07:50:04,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973328725] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:04,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:04,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783190993] [2023-11-19 07:50:04,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:04,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:04,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:04,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:04,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:04,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 285 [2023-11-19 07:50:04,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 20 transitions, 44 flow. Second operand has 2 states, 2 states have (on average 125.5) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 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 07:50:04,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:04,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 285 [2023-11-19 07:50:04,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:04,205 INFO L124 PetriNetUnfolderBase]: 13/36 cut-off events. [2023-11-19 07:50:04,207 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:04,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74 conditions, 36 events. 13/36 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 93 event pairs, 10 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 60. Up to 34 conditions per place. [2023-11-19 07:50:04,211 INFO L140 encePairwiseOnDemand]: 276/285 looper letters, 10 selfloop transitions, 0 changer transitions 0/11 dead transitions. [2023-11-19 07:50:04,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 14 places, 11 transitions, 46 flow [2023-11-19 07:50:04,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:04,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2023-11-19 07:50:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 265 transitions. [2023-11-19 07:50:04,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4649122807017544 [2023-11-19 07:50:04,242 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 265 transitions. [2023-11-19 07:50:04,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 265 transitions. [2023-11-19 07:50:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:04,251 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 265 transitions. [2023-11-19 07:50:04,257 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 132.5) internal successors, (265), 2 states have internal predecessors, (265), 0 states have call successors, (0), 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 07:50:04,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 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 07:50:04,265 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 285.0) internal successors, (855), 3 states have internal predecessors, (855), 0 states have call successors, (0), 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 07:50:04,267 INFO L175 Difference]: Start difference. First operand has 21 places, 20 transitions, 44 flow. Second operand 2 states and 265 transitions. [2023-11-19 07:50:04,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 14 places, 11 transitions, 46 flow [2023-11-19 07:50:04,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 14 places, 11 transitions, 46 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:04,276 INFO L231 Difference]: Finished difference. Result has 14 places, 11 transitions, 26 flow [2023-11-19 07:50:04,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=13, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=26, PETRI_PLACES=14, PETRI_TRANSITIONS=11} [2023-11-19 07:50:04,283 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -7 predicate places. [2023-11-19 07:50:04,283 INFO L495 AbstractCegarLoop]: Abstraction has has 14 places, 11 transitions, 26 flow [2023-11-19 07:50:04,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 125.5) internal successors, (251), 2 states have internal predecessors, (251), 0 states have call successors, (0), 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 07:50:04,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:04,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-11-19 07:50:04,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:50:04,285 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-19 07:50:04,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:04,286 INFO L85 PathProgramCache]: Analyzing trace with hash 602145001, now seen corresponding path program 1 times [2023-11-19 07:50:04,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:04,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512541830] [2023-11-19 07:50:04,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:04,538 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 07:50:04,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:04,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512541830] [2023-11-19 07:50:04,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512541830] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:04,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:04,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:04,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553631467] [2023-11-19 07:50:04,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:04,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:04,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:04,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:04,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:04,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 285 [2023-11-19 07:50:04,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 14 places, 11 transitions, 26 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 07:50:04,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:04,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 285 [2023-11-19 07:50:04,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:04,640 INFO L124 PetriNetUnfolderBase]: 15/41 cut-off events. [2023-11-19 07:50:04,641 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-11-19 07:50:04,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 41 events. 15/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 105 event pairs, 4 based on Foata normal form. 0/29 useless extension candidates. Maximal degree in co-relation 81. Up to 24 conditions per place. [2023-11-19 07:50:04,642 INFO L140 encePairwiseOnDemand]: 280/285 looper letters, 11 selfloop transitions, 2 changer transitions 0/14 dead transitions. [2023-11-19 07:50:04,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 14 transitions, 58 flow [2023-11-19 07:50:04,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:04,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-11-19 07:50:04,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41871345029239765 [2023-11-19 07:50:04,646 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-11-19 07:50:04,646 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-11-19 07:50:04,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:04,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-11-19 07:50:04,649 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 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 07:50:04,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:04,654 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 285.0) internal successors, (1140), 4 states have internal predecessors, (1140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:04,655 INFO L175 Difference]: Start difference. First operand has 14 places, 11 transitions, 26 flow. Second operand 3 states and 358 transitions. [2023-11-19 07:50:04,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 14 transitions, 58 flow [2023-11-19 07:50:04,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 14 transitions, 58 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:04,656 INFO L231 Difference]: Finished difference. Result has 17 places, 12 transitions, 42 flow [2023-11-19 07:50:04,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=285, PETRI_DIFFERENCE_MINUEND_FLOW=26, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=42, PETRI_PLACES=17, PETRI_TRANSITIONS=12} [2023-11-19 07:50:04,658 INFO L281 CegarLoopForPetriNet]: 21 programPoint places, -4 predicate places. [2023-11-19 07:50:04,658 INFO L495 AbstractCegarLoop]: Abstraction has has 17 places, 12 transitions, 42 flow [2023-11-19 07:50:04,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 07:50:04,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:04,667 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-11-19 07:50:04,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:50:04,669 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 18 more)] === [2023-11-19 07:50:04,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:04,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1486525613, now seen corresponding path program 1 times [2023-11-19 07:50:04,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:04,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711366226] [2023-11-19 07:50:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:04,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:04,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:04,715 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:04,771 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:04,771 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:50:04,774 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (20 of 21 remaining) [2023-11-19 07:50:04,779 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 21 remaining) [2023-11-19 07:50:04,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 21 remaining) [2023-11-19 07:50:04,780 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 21 remaining) [2023-11-19 07:50:04,781 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 21 remaining) [2023-11-19 07:50:04,786 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 21 remaining) [2023-11-19 07:50:04,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 21 remaining) [2023-11-19 07:50:04,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 21 remaining) [2023-11-19 07:50:04,787 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 21 remaining) [2023-11-19 07:50:04,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 21 remaining) [2023-11-19 07:50:04,788 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 21 remaining) [2023-11-19 07:50:04,789 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 21 remaining) [2023-11-19 07:50:04,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 21 remaining) [2023-11-19 07:50:04,790 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 21 remaining) [2023-11-19 07:50:04,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 21 remaining) [2023-11-19 07:50:04,791 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 21 remaining) [2023-11-19 07:50:04,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 21 remaining) [2023-11-19 07:50:04,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 21 remaining) [2023-11-19 07:50:04,792 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 21 remaining) [2023-11-19 07:50:04,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 21 remaining) [2023-11-19 07:50:04,793 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 21 remaining) [2023-11-19 07:50:04,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 07:50:04,794 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2023-11-19 07:50:04,797 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:50:04,797 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-11-19 07:50:04,874 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:04,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 444 flow [2023-11-19 07:50:04,992 INFO L124 PetriNetUnfolderBase]: 15/241 cut-off events. [2023-11-19 07:50:04,992 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:05,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 241 events. 15/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 495 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 187. Up to 6 conditions per place. [2023-11-19 07:50:05,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 217 transitions, 444 flow [2023-11-19 07:50:05,006 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 217 transitions, 444 flow [2023-11-19 07:50:05,007 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:05,007 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 209 places, 217 transitions, 444 flow [2023-11-19 07:50:05,007 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 209 places, 217 transitions, 444 flow [2023-11-19 07:50:05,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 217 transitions, 444 flow [2023-11-19 07:50:05,081 INFO L124 PetriNetUnfolderBase]: 15/241 cut-off events. [2023-11-19 07:50:05,081 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:50:05,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249 conditions, 241 events. 15/241 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 495 event pairs, 0 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 187. Up to 6 conditions per place. [2023-11-19 07:50:05,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 20184 [2023-11-19 07:50:11,332 INFO L134 LiptonReduction]: Checked pairs total: 60197 [2023-11-19 07:50:11,332 INFO L136 LiptonReduction]: Total number of compositions: 166 [2023-11-19 07:50:11,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:11,336 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@6ab9668a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:11,336 INFO L358 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2023-11-19 07:50:11,340 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:11,341 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-11-19 07:50:11,341 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:50:11,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:11,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:11,342 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-19 07:50:11,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1988253757, now seen corresponding path program 1 times [2023-11-19 07:50:11,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:11,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367092730] [2023-11-19 07:50:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:11,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:11,409 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 07:50:11,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:11,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367092730] [2023-11-19 07:50:11,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367092730] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:11,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:50:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690410514] [2023-11-19 07:50:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:11,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:11,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:11,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:11,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 198 out of 383 [2023-11-19 07:50:11,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 88 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 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 07:50:11,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:11,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 198 of 383 [2023-11-19 07:50:11,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:12,006 INFO L124 PetriNetUnfolderBase]: 1034/2218 cut-off events. [2023-11-19 07:50:12,007 INFO L125 PetriNetUnfolderBase]: For 42/42 co-relation queries the response was YES. [2023-11-19 07:50:12,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3876 conditions, 2218 events. 1034/2218 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15061 event pairs, 317 based on Foata normal form. 0/1629 useless extension candidates. Maximal degree in co-relation 3450. Up to 1170 conditions per place. [2023-11-19 07:50:12,027 INFO L140 encePairwiseOnDemand]: 368/383 looper letters, 77 selfloop transitions, 8 changer transitions 0/127 dead transitions. [2023-11-19 07:50:12,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 444 flow [2023-11-19 07:50:12,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:50:12,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:50:12,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1093 transitions. [2023-11-19 07:50:12,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.570757180156658 [2023-11-19 07:50:12,033 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1093 transitions. [2023-11-19 07:50:12,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1093 transitions. [2023-11-19 07:50:12,034 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:12,034 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1093 transitions. [2023-11-19 07:50:12,038 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 218.6) internal successors, (1093), 5 states have internal predecessors, (1093), 0 states have call successors, (0), 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 07:50:12,045 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 383.0) internal successors, (2298), 6 states have internal predecessors, (2298), 0 states have call successors, (0), 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 07:50:12,047 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 383.0) internal successors, (2298), 6 states have internal predecessors, (2298), 0 states have call successors, (0), 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 07:50:12,047 INFO L175 Difference]: Start difference. First operand has 83 places, 88 transitions, 186 flow. Second operand 5 states and 1093 transitions. [2023-11-19 07:50:12,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 444 flow [2023-11-19 07:50:12,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 127 transitions, 444 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:12,054 INFO L231 Difference]: Finished difference. Result has 88 places, 90 transitions, 246 flow [2023-11-19 07:50:12,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=383, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=246, PETRI_PLACES=88, PETRI_TRANSITIONS=90} [2023-11-19 07:50:12,057 INFO L281 CegarLoopForPetriNet]: 83 programPoint places, 5 predicate places. [2023-11-19 07:50:12,058 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 90 transitions, 246 flow [2023-11-19 07:50:12,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 200.0) internal successors, (800), 4 states have internal predecessors, (800), 0 states have call successors, (0), 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 07:50:12,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:12,059 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-11-19 07:50:12,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:50:12,059 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 28 more)] === [2023-11-19 07:50:12,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:12,060 INFO L85 PathProgramCache]: Analyzing trace with hash -360935096, now seen corresponding path program 1 times [2023-11-19 07:50:12,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:12,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821333352] [2023-11-19 07:50:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:12,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:12,097 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-19 07:50:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-19 07:50:12,127 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-19 07:50:12,129 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-19 07:50:12,129 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (30 of 31 remaining) [2023-11-19 07:50:12,129 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (29 of 31 remaining) [2023-11-19 07:50:12,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (28 of 31 remaining) [2023-11-19 07:50:12,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (27 of 31 remaining) [2023-11-19 07:50:12,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (26 of 31 remaining) [2023-11-19 07:50:12,130 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (25 of 31 remaining) [2023-11-19 07:50:12,131 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (24 of 31 remaining) [2023-11-19 07:50:12,135 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (23 of 31 remaining) [2023-11-19 07:50:12,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (22 of 31 remaining) [2023-11-19 07:50:12,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (21 of 31 remaining) [2023-11-19 07:50:12,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (20 of 31 remaining) [2023-11-19 07:50:12,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (19 of 31 remaining) [2023-11-19 07:50:12,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (18 of 31 remaining) [2023-11-19 07:50:12,136 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (17 of 31 remaining) [2023-11-19 07:50:12,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (16 of 31 remaining) [2023-11-19 07:50:12,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (15 of 31 remaining) [2023-11-19 07:50:12,138 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (14 of 31 remaining) [2023-11-19 07:50:12,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (13 of 31 remaining) [2023-11-19 07:50:12,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (12 of 31 remaining) [2023-11-19 07:50:12,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (11 of 31 remaining) [2023-11-19 07:50:12,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (10 of 31 remaining) [2023-11-19 07:50:12,139 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 31 remaining) [2023-11-19 07:50:12,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 31 remaining) [2023-11-19 07:50:12,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 31 remaining) [2023-11-19 07:50:12,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 31 remaining) [2023-11-19 07:50:12,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 31 remaining) [2023-11-19 07:50:12,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 31 remaining) [2023-11-19 07:50:12,140 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err6ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 31 remaining) [2023-11-19 07:50:12,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err7ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 31 remaining) [2023-11-19 07:50:12,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err8ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 31 remaining) [2023-11-19 07:50:12,141 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err9ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 31 remaining) [2023-11-19 07:50:12,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 07:50:12,141 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-11-19 07:50:12,142 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2023-11-19 07:50:12,142 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2023-11-19 07:50:12,205 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-11-19 07:50:12,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 305 transitions, 628 flow [2023-11-19 07:50:12,297 INFO L124 PetriNetUnfolderBase]: 22/342 cut-off events. [2023-11-19 07:50:12,297 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:50:12,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 342 events. 22/342 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 992 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 274. Up to 8 conditions per place. [2023-11-19 07:50:12,301 INFO L82 GeneralOperation]: Start removeDead. Operand has 293 places, 305 transitions, 628 flow [2023-11-19 07:50:12,307 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 293 places, 305 transitions, 628 flow [2023-11-19 07:50:12,307 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:50:12,307 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 293 places, 305 transitions, 628 flow [2023-11-19 07:50:12,308 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 293 places, 305 transitions, 628 flow [2023-11-19 07:50:12,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 293 places, 305 transitions, 628 flow [2023-11-19 07:50:12,410 INFO L124 PetriNetUnfolderBase]: 22/342 cut-off events. [2023-11-19 07:50:12,411 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-11-19 07:50:12,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 355 conditions, 342 events. 22/342 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 992 event pairs, 0 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 274. Up to 8 conditions per place. [2023-11-19 07:50:12,447 INFO L119 LiptonReduction]: Number of co-enabled transitions 53244 [2023-11-19 07:50:19,303 INFO L134 LiptonReduction]: Checked pairs total: 167237 [2023-11-19 07:50:19,304 INFO L136 LiptonReduction]: Total number of compositions: 225 [2023-11-19 07:50:19,306 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:19,306 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@6ab9668a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:19,307 INFO L358 AbstractCegarLoop]: Starting to check reachability of 41 error locations. [2023-11-19 07:50:19,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:50:19,310 INFO L124 PetriNetUnfolderBase]: 2/24 cut-off events. [2023-11-19 07:50:19,311 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-11-19 07:50:19,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:19,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:19,311 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-19 07:50:19,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:19,312 INFO L85 PathProgramCache]: Analyzing trace with hash -621072409, now seen corresponding path program 1 times [2023-11-19 07:50:19,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:19,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392957358] [2023-11-19 07:50:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:19,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:19,365 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 07:50:19,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:19,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392957358] [2023-11-19 07:50:19,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392957358] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:19,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:19,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584469834] [2023-11-19 07:50:19,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:19,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:19,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:19,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 287 out of 530 [2023-11-19 07:50:19,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 129 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:19,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:19,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 287 of 530 [2023-11-19 07:50:19,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:50:28,332 INFO L124 PetriNetUnfolderBase]: 47379/79472 cut-off events. [2023-11-19 07:50:28,332 INFO L125 PetriNetUnfolderBase]: For 2632/2632 co-relation queries the response was YES. [2023-11-19 07:50:28,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144642 conditions, 79472 events. 47379/79472 cut-off events. For 2632/2632 co-relation queries the response was YES. Maximal size of possible extension queue 2199. Compared 724723 event pairs, 12374 based on Foata normal form. 0/53348 useless extension candidates. Maximal degree in co-relation 82041. Up to 56992 conditions per place. [2023-11-19 07:50:28,981 INFO L140 encePairwiseOnDemand]: 518/530 looper letters, 130 selfloop transitions, 6 changer transitions 0/191 dead transitions. [2023-11-19 07:50:28,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 191 transitions, 684 flow [2023-11-19 07:50:28,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:50:28,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:50:28,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1007 transitions. [2023-11-19 07:50:28,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2023-11-19 07:50:28,986 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1007 transitions. [2023-11-19 07:50:28,986 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1007 transitions. [2023-11-19 07:50:28,987 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:50:28,987 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1007 transitions. [2023-11-19 07:50:28,990 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 335.6666666666667) internal successors, (1007), 3 states have internal predecessors, (1007), 0 states have call successors, (0), 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 07:50:28,995 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 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 07:50:28,997 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 530.0) internal successors, (2120), 4 states have internal predecessors, (2120), 0 states have call successors, (0), 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 07:50:28,997 INFO L175 Difference]: Start difference. First operand has 121 places, 129 transitions, 276 flow. Second operand 3 states and 1007 transitions. [2023-11-19 07:50:28,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 191 transitions, 684 flow [2023-11-19 07:50:29,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 191 transitions, 680 flow, removed 2 selfloop flow, removed 0 redundant places. [2023-11-19 07:50:29,009 INFO L231 Difference]: Finished difference. Result has 124 places, 130 transitions, 314 flow [2023-11-19 07:50:29,009 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=530, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=314, PETRI_PLACES=124, PETRI_TRANSITIONS=130} [2023-11-19 07:50:29,013 INFO L281 CegarLoopForPetriNet]: 121 programPoint places, 3 predicate places. [2023-11-19 07:50:29,013 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 130 transitions, 314 flow [2023-11-19 07:50:29,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 289.6666666666667) internal successors, (869), 3 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:50:29,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:50:29,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:29,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 07:50:29,015 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thr1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thr1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 38 more)] === [2023-11-19 07:50:29,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1129601176, now seen corresponding path program 1 times [2023-11-19 07:50:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:29,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965325299] [2023-11-19 07:50:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:29,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:29,114 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 07:50:29,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:29,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965325299] [2023-11-19 07:50:29,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965325299] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:29,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:29,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:50:29,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892100309] [2023-11-19 07:50:29,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:29,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:50:29,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:29,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:50:29,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:50:29,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 266 out of 530 [2023-11-19 07:50:29,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 130 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 268.6666666666667) internal successors, (806), 3 states have internal predecessors, (806), 0 states have call successors, (0), 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 07:50:29,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:50:29,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 266 of 530 [2023-11-19 07:50:29,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand