./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:06:03,513 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:06:03,586 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:06:03,590 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:06:03,591 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:06:03,614 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:06:03,614 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:06:03,615 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:06:03,615 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:06:03,615 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:06:03,616 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:06:03,616 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:06:03,616 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:06:03,616 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:06:03,617 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:06:03,617 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:06:03,617 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:06:03,617 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:06:03,618 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:06:03,618 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:06:03,618 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:06:03,619 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:06:03,619 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:06:03,619 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:06:03,619 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:06:03,620 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:06:03,620 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:06:03,620 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:06:03,620 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:06:03,621 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:06:03,621 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:06:03,621 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:06:03,621 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:06:03,622 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:06:03,622 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:06:03,622 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:06:03,623 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:06:03,623 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:06:03,623 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:06:03,623 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:06:03,624 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:06:03,624 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:06:03,624 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:06:03,625 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1e30b67a045ce6921ac9aa6cdcebddb50c3d7d787a6b9dd7b66c9173f916fde4 [2024-01-27 15:06:03,837 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:06:03,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:06:03,860 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:06:03,862 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:06:03,862 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:06:03,863 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2024-01-27 15:06:04,876 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:06:05,039 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:06:05,040 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2024-01-27 15:06:05,055 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53e2caaa/88f329a7be8345de9ac79ef34b57710b/FLAG3743131f9 [2024-01-27 15:06:05,064 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a53e2caaa/88f329a7be8345de9ac79ef34b57710b [2024-01-27 15:06:05,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:06:05,069 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:06:05,073 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:06:05,073 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:06:05,077 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:06:05,077 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,078 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acc53a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05, skipping insertion in model container [2024-01-27 15:06:05,078 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,118 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:06:05,401 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2024-01-27 15:06:05,404 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:06:05,410 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:06:05,447 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i[30961,30974] [2024-01-27 15:06:05,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:06:05,479 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:06:05,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05 WrapperNode [2024-01-27 15:06:05,480 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:06:05,481 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:06:05,481 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:06:05,481 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:06:05,486 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,525 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 45 [2024-01-27 15:06:05,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:06:05,526 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:06:05,526 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:06:05,526 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:06:05,534 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,535 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,539 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,558 INFO L175 MemorySlicer]: Split 4 memory accesses to 3 slices as follows [2, 1, 1]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-01-27 15:06:05,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,559 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,570 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,573 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,577 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,578 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,583 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:06:05,585 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:06:05,585 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:06:05,586 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:06:05,586 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (1/1) ... [2024-01-27 15:06:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:06:05,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:05,611 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:06:05,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:06:05,668 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-27 15:06:05,668 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-27 15:06:05,669 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-27 15:06:05,669 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-27 15:06:05,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:06:05,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:06:05,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:06:05,669 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:06:05,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:06:05,670 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:06:05,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:06:05,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:06:05,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:06:05,670 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:06:05,670 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:06:05,671 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:06:05,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:06:05,672 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:06:05,770 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:06:05,772 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:06:05,874 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:06:05,875 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:06:05,957 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:06:05,957 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-27 15:06:05,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:06:05 BoogieIcfgContainer [2024-01-27 15:06:05,957 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:06:05,959 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:06:05,959 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:06:05,962 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:06:05,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:06:05" (1/3) ... [2024-01-27 15:06:05,963 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461706e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:06:05, skipping insertion in model container [2024-01-27 15:06:05,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:06:05" (2/3) ... [2024-01-27 15:06:05,964 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@461706e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:06:05, skipping insertion in model container [2024-01-27 15:06:05,964 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:06:05" (3/3) ... [2024-01-27 15:06:05,965 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2024-01-27 15:06:05,971 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:06:05,977 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:06:05,978 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:06:05,978 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:06:06,021 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-01-27 15:06:06,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 28 places, 24 transitions, 56 flow [2024-01-27 15:06:06,070 INFO L124 PetriNetUnfolderBase]: 3/22 cut-off events. [2024-01-27 15:06:06,070 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:06:06,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29 conditions, 22 events. 3/22 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 30 event pairs, 0 based on Foata normal form. 0/18 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-01-27 15:06:06,073 INFO L82 GeneralOperation]: Start removeDead. Operand has 28 places, 24 transitions, 56 flow [2024-01-27 15:06:06,075 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 26 places, 22 transitions, 50 flow [2024-01-27 15:06:06,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:06:06,092 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;@772aaf9f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:06:06,093 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:06:06,099 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:06:06,099 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-01-27 15:06:06,099 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-01-27 15:06:06,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:06,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:06,100 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:06,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1796875976, now seen corresponding path program 1 times [2024-01-27 15:06:06,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:06,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390489814] [2024-01-27 15:06:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:06,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:06,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:06,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:06,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390489814] [2024-01-27 15:06:06,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390489814] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:06,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:06:06,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:06:06,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804134980] [2024-01-27 15:06:06,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:06,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-27 15:06:06,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:06,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-27 15:06:06,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-27 15:06:06,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:06,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 50 flow. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:06,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:06,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:06,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:06,728 INFO L124 PetriNetUnfolderBase]: 321/543 cut-off events. [2024-01-27 15:06:06,728 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-27 15:06:06,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 543 events. 321/543 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2187 event pairs, 62 based on Foata normal form. 12/542 useless extension candidates. Maximal degree in co-relation 1045. Up to 221 conditions per place. [2024-01-27 15:06:06,733 INFO L140 encePairwiseOnDemand]: 16/24 looper letters, 25 selfloop transitions, 4 changer transitions 22/54 dead transitions. [2024-01-27 15:06:06,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 54 transitions, 216 flow [2024-01-27 15:06:06,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-27 15:06:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-27 15:06:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 84 transitions. [2024-01-27 15:06:06,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-01-27 15:06:06,743 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 50 flow. Second operand 6 states and 84 transitions. [2024-01-27 15:06:06,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 54 transitions, 216 flow [2024-01-27 15:06:06,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 54 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-27 15:06:06,747 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 71 flow [2024-01-27 15:06:06,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=71, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2024-01-27 15:06:06,750 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2024-01-27 15:06:06,751 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 71 flow [2024-01-27 15:06:06,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:06,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:06,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:06,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:06:06,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:06,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:06,752 INFO L85 PathProgramCache]: Analyzing trace with hash 676521124, now seen corresponding path program 1 times [2024-01-27 15:06:06,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:06,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018267677] [2024-01-27 15:06:06,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:06,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:06,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:06,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018267677] [2024-01-27 15:06:06,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018267677] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:06,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:06:06,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:06:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014208932] [2024-01-27 15:06:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:06,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:06:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:06:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:06:06,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:06,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 71 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:06,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:06,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:06,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:07,054 INFO L124 PetriNetUnfolderBase]: 382/689 cut-off events. [2024-01-27 15:06:07,056 INFO L125 PetriNetUnfolderBase]: For 285/291 co-relation queries the response was YES. [2024-01-27 15:06:07,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1586 conditions, 689 events. 382/689 cut-off events. For 285/291 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2926 event pairs, 65 based on Foata normal form. 33/721 useless extension candidates. Maximal degree in co-relation 1572. Up to 246 conditions per place. [2024-01-27 15:06:07,064 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 46 selfloop transitions, 9 changer transitions 20/78 dead transitions. [2024-01-27 15:06:07,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 78 transitions, 379 flow [2024-01-27 15:06:07,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:06:07,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:06:07,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-01-27 15:06:07,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-01-27 15:06:07,068 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 71 flow. Second operand 9 states and 117 transitions. [2024-01-27 15:06:07,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 78 transitions, 379 flow [2024-01-27 15:06:07,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 78 transitions, 363 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-27 15:06:07,077 INFO L231 Difference]: Finished difference. Result has 42 places, 31 transitions, 156 flow [2024-01-27 15:06:07,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=156, PETRI_PLACES=42, PETRI_TRANSITIONS=31} [2024-01-27 15:06:07,078 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 16 predicate places. [2024-01-27 15:06:07,079 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 156 flow [2024-01-27 15:06:07,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:07,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:07,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:07,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:06:07,080 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:07,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:07,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1193097064, now seen corresponding path program 2 times [2024-01-27 15:06:07,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:07,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063751503] [2024-01-27 15:06:07,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:07,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:07,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:07,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063751503] [2024-01-27 15:06:07,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063751503] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:07,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:06:07,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-27 15:06:07,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107695616] [2024-01-27 15:06:07,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:07,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-27 15:06:07,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:07,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-27 15:06:07,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-01-27 15:06:07,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:07,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 31 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:07,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:07,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:07,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:07,372 INFO L124 PetriNetUnfolderBase]: 373/686 cut-off events. [2024-01-27 15:06:07,372 INFO L125 PetriNetUnfolderBase]: For 1121/1133 co-relation queries the response was YES. [2024-01-27 15:06:07,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1953 conditions, 686 events. 373/686 cut-off events. For 1121/1133 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2987 event pairs, 80 based on Foata normal form. 48/733 useless extension candidates. Maximal degree in co-relation 1932. Up to 237 conditions per place. [2024-01-27 15:06:07,376 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 42 selfloop transitions, 15 changer transitions 32/92 dead transitions. [2024-01-27 15:06:07,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 92 transitions, 578 flow [2024-01-27 15:06:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:06:07,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:06:07,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 126 transitions. [2024-01-27 15:06:07,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-01-27 15:06:07,380 INFO L175 Difference]: Start difference. First operand has 42 places, 31 transitions, 156 flow. Second operand 10 states and 126 transitions. [2024-01-27 15:06:07,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 92 transitions, 578 flow [2024-01-27 15:06:07,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 92 transitions, 568 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-01-27 15:06:07,388 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 270 flow [2024-01-27 15:06:07,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=270, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-01-27 15:06:07,390 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 27 predicate places. [2024-01-27 15:06:07,390 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 270 flow [2024-01-27 15:06:07,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:07,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:07,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:07,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:06:07,391 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:07,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:07,392 INFO L85 PathProgramCache]: Analyzing trace with hash -965618439, now seen corresponding path program 1 times [2024-01-27 15:06:07,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:07,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186772916] [2024-01-27 15:06:07,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:07,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:07,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:07,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:07,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186772916] [2024-01-27 15:06:07,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186772916] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:07,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:06:07,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:06:07,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714774026] [2024-01-27 15:06:07,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:07,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:06:07,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:07,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:06:07,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:06:07,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:07,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 270 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:07,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:07,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:07,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:07,745 INFO L124 PetriNetUnfolderBase]: 508/929 cut-off events. [2024-01-27 15:06:07,745 INFO L125 PetriNetUnfolderBase]: For 3595/3607 co-relation queries the response was YES. [2024-01-27 15:06:07,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3131 conditions, 929 events. 508/929 cut-off events. For 3595/3607 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4250 event pairs, 53 based on Foata normal form. 39/965 useless extension candidates. Maximal degree in co-relation 3103. Up to 238 conditions per place. [2024-01-27 15:06:07,751 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 56 selfloop transitions, 21 changer transitions 23/103 dead transitions. [2024-01-27 15:06:07,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 103 transitions, 774 flow [2024-01-27 15:06:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-27 15:06:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-27 15:06:07,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-01-27 15:06:07,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-01-27 15:06:07,754 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 270 flow. Second operand 11 states and 141 transitions. [2024-01-27 15:06:07,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 103 transitions, 774 flow [2024-01-27 15:06:07,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 103 transitions, 709 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-01-27 15:06:07,762 INFO L231 Difference]: Finished difference. Result has 63 places, 45 transitions, 378 flow [2024-01-27 15:06:07,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=378, PETRI_PLACES=63, PETRI_TRANSITIONS=45} [2024-01-27 15:06:07,763 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 37 predicate places. [2024-01-27 15:06:07,763 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 45 transitions, 378 flow [2024-01-27 15:06:07,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:07,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:07,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:07,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:06:07,764 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:07,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:07,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1387768189, now seen corresponding path program 2 times [2024-01-27 15:06:07,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:07,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477662020] [2024-01-27 15:06:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:07,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:07,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:07,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477662020] [2024-01-27 15:06:07,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477662020] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:07,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:06:07,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-27 15:06:07,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286073539] [2024-01-27 15:06:07,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:07,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-01-27 15:06:07,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:07,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-01-27 15:06:07,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-01-27 15:06:07,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:07,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 45 transitions, 378 flow. Second operand has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:07,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:07,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:07,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:08,049 INFO L124 PetriNetUnfolderBase]: 454/848 cut-off events. [2024-01-27 15:06:08,049 INFO L125 PetriNetUnfolderBase]: For 5140/5152 co-relation queries the response was YES. [2024-01-27 15:06:08,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3226 conditions, 848 events. 454/848 cut-off events. For 5140/5152 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3884 event pairs, 71 based on Foata normal form. 57/902 useless extension candidates. Maximal degree in co-relation 3193. Up to 226 conditions per place. [2024-01-27 15:06:08,055 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 44 selfloop transitions, 21 changer transitions 31/99 dead transitions. [2024-01-27 15:06:08,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 910 flow [2024-01-27 15:06:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-27 15:06:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-27 15:06:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-01-27 15:06:08,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-01-27 15:06:08,056 INFO L175 Difference]: Start difference. First operand has 63 places, 45 transitions, 378 flow. Second operand 10 states and 125 transitions. [2024-01-27 15:06:08,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 910 flow [2024-01-27 15:06:08,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 99 transitions, 835 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-01-27 15:06:08,070 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 434 flow [2024-01-27 15:06:08,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=434, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2024-01-27 15:06:08,073 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 42 predicate places. [2024-01-27 15:06:08,075 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 434 flow [2024-01-27 15:06:08,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.714285714285714) internal successors, (47), 7 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:08,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:08,075 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:08,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-01-27 15:06:08,076 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:08,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:08,077 INFO L85 PathProgramCache]: Analyzing trace with hash 929269238, now seen corresponding path program 1 times [2024-01-27 15:06:08,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:08,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209646444] [2024-01-27 15:06:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:08,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:08,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:08,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209646444] [2024-01-27 15:06:08,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209646444] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:08,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724688347] [2024-01-27 15:06:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:08,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:08,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:08,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:08,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:06:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:08,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:06:08,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:08,324 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:08,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724688347] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:08,446 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:08,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-01-27 15:06:08,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972083409] [2024-01-27 15:06:08,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:08,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-01-27 15:06:08,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:08,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-01-27 15:06:08,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:06:08,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:08,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 434 flow. Second operand has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:08,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:08,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:08,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:08,817 INFO L124 PetriNetUnfolderBase]: 652/1187 cut-off events. [2024-01-27 15:06:08,817 INFO L125 PetriNetUnfolderBase]: For 9429/9441 co-relation queries the response was YES. [2024-01-27 15:06:08,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4851 conditions, 1187 events. 652/1187 cut-off events. For 9429/9441 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 5248 event pairs, 59 based on Foata normal form. 57/1241 useless extension candidates. Maximal degree in co-relation 4816. Up to 198 conditions per place. [2024-01-27 15:06:08,823 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 66 selfloop transitions, 36 changer transitions 56/161 dead transitions. [2024-01-27 15:06:08,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 161 transitions, 1524 flow [2024-01-27 15:06:08,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-01-27 15:06:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-01-27 15:06:08,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 236 transitions. [2024-01-27 15:06:08,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175438596491229 [2024-01-27 15:06:08,825 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 434 flow. Second operand 19 states and 236 transitions. [2024-01-27 15:06:08,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 161 transitions, 1524 flow [2024-01-27 15:06:08,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 161 transitions, 1389 flow, removed 50 selfloop flow, removed 9 redundant places. [2024-01-27 15:06:08,837 INFO L231 Difference]: Finished difference. Result has 84 places, 63 transitions, 759 flow [2024-01-27 15:06:08,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=759, PETRI_PLACES=84, PETRI_TRANSITIONS=63} [2024-01-27 15:06:08,838 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 58 predicate places. [2024-01-27 15:06:08,838 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 63 transitions, 759 flow [2024-01-27 15:06:08,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 7.071428571428571) internal successors, (99), 14 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:08,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:08,838 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:08,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-01-27 15:06:09,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-01-27 15:06:09,050 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:09,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:09,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1231386502, now seen corresponding path program 1 times [2024-01-27 15:06:09,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:09,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465704470] [2024-01-27 15:06:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:09,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:09,150 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:09,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:09,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465704470] [2024-01-27 15:06:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465704470] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:09,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115916144] [2024-01-27 15:06:09,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:09,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:09,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:09,152 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:09,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:06:09,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:09,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:06:09,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:09,274 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:09,275 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:09,411 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:09,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115916144] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:09,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:09,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-27 15:06:09,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871540773] [2024-01-27 15:06:09,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:09,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:06:09,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:09,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:06:09,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:06:09,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:09,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 63 transitions, 759 flow. Second operand has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:09,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:09,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:09,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:09,883 INFO L124 PetriNetUnfolderBase]: 850/1598 cut-off events. [2024-01-27 15:06:09,883 INFO L125 PetriNetUnfolderBase]: For 18935/18947 co-relation queries the response was YES. [2024-01-27 15:06:09,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7302 conditions, 1598 events. 850/1598 cut-off events. For 18935/18947 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 7097 event pairs, 215 based on Foata normal form. 93/1690 useless extension candidates. Maximal degree in co-relation 7261. Up to 738 conditions per place. [2024-01-27 15:06:09,892 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 94 selfloop transitions, 27 changer transitions 89/213 dead transitions. [2024-01-27 15:06:09,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 213 transitions, 2429 flow [2024-01-27 15:06:09,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-01-27 15:06:09,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-01-27 15:06:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 301 transitions. [2024-01-27 15:06:09,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016666666666667 [2024-01-27 15:06:09,894 INFO L175 Difference]: Start difference. First operand has 84 places, 63 transitions, 759 flow. Second operand 25 states and 301 transitions. [2024-01-27 15:06:09,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 213 transitions, 2429 flow [2024-01-27 15:06:09,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 213 transitions, 1922 flow, removed 241 selfloop flow, removed 10 redundant places. [2024-01-27 15:06:09,917 INFO L231 Difference]: Finished difference. Result has 112 places, 77 transitions, 855 flow [2024-01-27 15:06:09,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=855, PETRI_PLACES=112, PETRI_TRANSITIONS=77} [2024-01-27 15:06:09,918 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 86 predicate places. [2024-01-27 15:06:09,918 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 77 transitions, 855 flow [2024-01-27 15:06:09,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:09,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:09,919 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:09,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:06:10,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-01-27 15:06:10,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:10,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:10,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1123190028, now seen corresponding path program 2 times [2024-01-27 15:06:10,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:10,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660329396] [2024-01-27 15:06:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:10,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:10,317 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:06:10,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:10,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660329396] [2024-01-27 15:06:10,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660329396] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:10,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714914331] [2024-01-27 15:06:10,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:06:10,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:10,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:10,320 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:10,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:06:10,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:06:10,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:10,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:06:10,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:10,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:06:10,446 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:06:10,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714914331] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:10,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:10,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-01-27 15:06:10,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163963847] [2024-01-27 15:06:10,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:10,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:06:10,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:10,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:06:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:06:10,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:10,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 77 transitions, 855 flow. Second operand has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:10,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:10,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:10,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:11,268 INFO L124 PetriNetUnfolderBase]: 1444/2732 cut-off events. [2024-01-27 15:06:11,268 INFO L125 PetriNetUnfolderBase]: For 62752/62764 co-relation queries the response was YES. [2024-01-27 15:06:11,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14401 conditions, 2732 events. 1444/2732 cut-off events. For 62752/62764 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 14620 event pairs, 136 based on Foata normal form. 93/2824 useless extension candidates. Maximal degree in co-relation 14347. Up to 492 conditions per place. [2024-01-27 15:06:11,284 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 127 selfloop transitions, 81 changer transitions 91/302 dead transitions. [2024-01-27 15:06:11,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 302 transitions, 3893 flow [2024-01-27 15:06:11,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-01-27 15:06:11,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2024-01-27 15:06:11,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 393 transitions. [2024-01-27 15:06:11,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.51171875 [2024-01-27 15:06:11,287 INFO L175 Difference]: Start difference. First operand has 112 places, 77 transitions, 855 flow. Second operand 32 states and 393 transitions. [2024-01-27 15:06:11,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 302 transitions, 3893 flow [2024-01-27 15:06:11,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 302 transitions, 3232 flow, removed 321 selfloop flow, removed 13 redundant places. [2024-01-27 15:06:11,332 INFO L231 Difference]: Finished difference. Result has 144 places, 120 transitions, 1642 flow [2024-01-27 15:06:11,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=700, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1642, PETRI_PLACES=144, PETRI_TRANSITIONS=120} [2024-01-27 15:06:11,334 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 118 predicate places. [2024-01-27 15:06:11,334 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 120 transitions, 1642 flow [2024-01-27 15:06:11,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 7.352941176470588) internal successors, (125), 17 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:11,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:11,334 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:11,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:06:11,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:11,548 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:11,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:11,549 INFO L85 PathProgramCache]: Analyzing trace with hash 989712276, now seen corresponding path program 3 times [2024-01-27 15:06:11,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:11,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402053229] [2024-01-27 15:06:11,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:11,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:11,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:11,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:11,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:11,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402053229] [2024-01-27 15:06:11,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402053229] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:11,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90512949] [2024-01-27 15:06:11,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:06:11,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:11,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:11,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:11,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:06:11,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:06:11,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:11,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:06:11,691 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:11,726 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:11,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:11,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90512949] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:11,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:11,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-01-27 15:06:11,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714397556] [2024-01-27 15:06:11,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:11,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-27 15:06:11,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:11,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-27 15:06:11,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-01-27 15:06:11,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:11,839 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 120 transitions, 1642 flow. Second operand has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:11,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:11,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:11,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:12,814 INFO L124 PetriNetUnfolderBase]: 1831/3450 cut-off events. [2024-01-27 15:06:12,814 INFO L125 PetriNetUnfolderBase]: For 140789/140795 co-relation queries the response was YES. [2024-01-27 15:06:12,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21211 conditions, 3450 events. 1831/3450 cut-off events. For 140789/140795 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 19470 event pairs, 58 based on Foata normal form. 123/3572 useless extension candidates. Maximal degree in co-relation 21142. Up to 648 conditions per place. [2024-01-27 15:06:12,836 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 124 selfloop transitions, 122 changer transitions 115/364 dead transitions. [2024-01-27 15:06:12,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 364 transitions, 5777 flow [2024-01-27 15:06:12,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-01-27 15:06:12,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-01-27 15:06:12,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 443 transitions. [2024-01-27 15:06:12,838 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5127314814814815 [2024-01-27 15:06:12,838 INFO L175 Difference]: Start difference. First operand has 144 places, 120 transitions, 1642 flow. Second operand 36 states and 443 transitions. [2024-01-27 15:06:12,838 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 364 transitions, 5777 flow [2024-01-27 15:06:12,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 364 transitions, 4926 flow, removed 409 selfloop flow, removed 15 redundant places. [2024-01-27 15:06:12,989 INFO L231 Difference]: Finished difference. Result has 178 places, 155 transitions, 2476 flow [2024-01-27 15:06:12,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2476, PETRI_PLACES=178, PETRI_TRANSITIONS=155} [2024-01-27 15:06:12,990 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 152 predicate places. [2024-01-27 15:06:12,990 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 155 transitions, 2476 flow [2024-01-27 15:06:12,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 7.277777777777778) internal successors, (131), 18 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:12,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:12,991 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:13,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-27 15:06:13,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:13,202 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:13,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1444510883, now seen corresponding path program 4 times [2024-01-27 15:06:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:13,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379248396] [2024-01-27 15:06:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:13,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379248396] [2024-01-27 15:06:13,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379248396] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:13,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569888284] [2024-01-27 15:06:13,330 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:06:13,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:13,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:13,331 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:13,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:06:13,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:06:13,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:13,387 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 15 conjunts are in the unsatisfiable core [2024-01-27 15:06:13,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:13,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:13,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569888284] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:13,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:13,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-01-27 15:06:13,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796136923] [2024-01-27 15:06:13,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:13,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-01-27 15:06:13,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-01-27 15:06:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-01-27 15:06:13,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:13,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 155 transitions, 2476 flow. Second operand has 25 states, 25 states have (on average 7.08) internal successors, (177), 25 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:13,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:13,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:13,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:15,138 INFO L124 PetriNetUnfolderBase]: 2641/4917 cut-off events. [2024-01-27 15:06:15,138 INFO L125 PetriNetUnfolderBase]: For 314431/314437 co-relation queries the response was YES. [2024-01-27 15:06:15,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36351 conditions, 4917 events. 2641/4917 cut-off events. For 314431/314437 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 26730 event pairs, 89 based on Foata normal form. 105/5019 useless extension candidates. Maximal degree in co-relation 36270. Up to 966 conditions per place. [2024-01-27 15:06:15,187 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 164 selfloop transitions, 177 changer transitions 146/490 dead transitions. [2024-01-27 15:06:15,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 490 transitions, 9791 flow [2024-01-27 15:06:15,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 15:06:15,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 15:06:15,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 602 transitions. [2024-01-27 15:06:15,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119047619047619 [2024-01-27 15:06:15,190 INFO L175 Difference]: Start difference. First operand has 178 places, 155 transitions, 2476 flow. Second operand 49 states and 602 transitions. [2024-01-27 15:06:15,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 490 transitions, 9791 flow [2024-01-27 15:06:15,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 490 transitions, 8185 flow, removed 770 selfloop flow, removed 20 redundant places. [2024-01-27 15:06:15,540 INFO L231 Difference]: Finished difference. Result has 228 places, 216 transitions, 4026 flow [2024-01-27 15:06:15,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=4026, PETRI_PLACES=228, PETRI_TRANSITIONS=216} [2024-01-27 15:06:15,547 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 202 predicate places. [2024-01-27 15:06:15,547 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 216 transitions, 4026 flow [2024-01-27 15:06:15,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 7.08) internal successors, (177), 25 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:15,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:15,548 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:15,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-27 15:06:15,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-01-27 15:06:15,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:15,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:15,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1706148982, now seen corresponding path program 5 times [2024-01-27 15:06:15,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:15,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229919616] [2024-01-27 15:06:15,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:15,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:15,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:06:16,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229919616] [2024-01-27 15:06:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229919616] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340124531] [2024-01-27 15:06:16,026 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:06:16,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:16,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:16,027 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:16,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:06:16,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-01-27 15:06:16,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:16,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:06:16,135 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:06:16,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:16,495 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:06:16,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340124531] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:16,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:16,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 28 [2024-01-27 15:06:16,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139794701] [2024-01-27 15:06:16,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:16,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:06:16,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:16,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:06:16,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=619, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:06:16,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:16,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 216 transitions, 4026 flow. Second operand has 29 states, 29 states have (on average 7.310344827586207) internal successors, (212), 29 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:16,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:16,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:16,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:18,021 INFO L124 PetriNetUnfolderBase]: 2767/5285 cut-off events. [2024-01-27 15:06:18,021 INFO L125 PetriNetUnfolderBase]: For 532947/532953 co-relation queries the response was YES. [2024-01-27 15:06:18,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44213 conditions, 5285 events. 2767/5285 cut-off events. For 532947/532953 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 29578 event pairs, 1013 based on Foata normal form. 87/5371 useless extension candidates. Maximal degree in co-relation 44110. Up to 3600 conditions per place. [2024-01-27 15:06:18,069 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 266 selfloop transitions, 49 changer transitions 113/431 dead transitions. [2024-01-27 15:06:18,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 431 transitions, 10200 flow [2024-01-27 15:06:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:06:18,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:06:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 433 transitions. [2024-01-27 15:06:18,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48761261261261263 [2024-01-27 15:06:18,071 INFO L175 Difference]: Start difference. First operand has 228 places, 216 transitions, 4026 flow. Second operand 37 states and 433 transitions. [2024-01-27 15:06:18,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 431 transitions, 10200 flow [2024-01-27 15:06:18,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 431 transitions, 7598 flow, removed 1279 selfloop flow, removed 17 redundant places. [2024-01-27 15:06:18,784 INFO L231 Difference]: Finished difference. Result has 255 places, 234 transitions, 3761 flow [2024-01-27 15:06:18,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=2978, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=3761, PETRI_PLACES=255, PETRI_TRANSITIONS=234} [2024-01-27 15:06:18,785 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 229 predicate places. [2024-01-27 15:06:18,785 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 234 transitions, 3761 flow [2024-01-27 15:06:18,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.310344827586207) internal successors, (212), 29 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:18,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:18,786 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:18,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-01-27 15:06:18,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:18,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:18,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash -477753174, now seen corresponding path program 6 times [2024-01-27 15:06:18,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:18,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274874393] [2024-01-27 15:06:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:18,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:18,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:19,401 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:19,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274874393] [2024-01-27 15:06:19,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274874393] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:19,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022911619] [2024-01-27 15:06:19,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:06:19,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:19,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:19,402 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:19,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:06:19,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-01-27 15:06:19,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:19,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:06:19,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:19,603 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:19,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:19,888 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:19,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022911619] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:19,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:19,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 30 [2024-01-27 15:06:19,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668693481] [2024-01-27 15:06:19,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:19,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-01-27 15:06:19,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:19,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-01-27 15:06:19,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2024-01-27 15:06:19,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:19,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 234 transitions, 3761 flow. Second operand has 31 states, 31 states have (on average 7.290322580645161) internal successors, (226), 31 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:19,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:19,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:19,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:21,954 INFO L124 PetriNetUnfolderBase]: 3289/6476 cut-off events. [2024-01-27 15:06:21,954 INFO L125 PetriNetUnfolderBase]: For 571183/571189 co-relation queries the response was YES. [2024-01-27 15:06:21,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50126 conditions, 6476 events. 3289/6476 cut-off events. For 571183/571189 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 38731 event pairs, 600 based on Foata normal form. 87/6562 useless extension candidates. Maximal degree in co-relation 50014. Up to 2398 conditions per place. [2024-01-27 15:06:22,000 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 232 selfloop transitions, 169 changer transitions 127/531 dead transitions. [2024-01-27 15:06:22,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 531 transitions, 10478 flow [2024-01-27 15:06:22,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-01-27 15:06:22,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-01-27 15:06:22,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 519 transitions. [2024-01-27 15:06:22,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-01-27 15:06:22,008 INFO L175 Difference]: Start difference. First operand has 255 places, 234 transitions, 3761 flow. Second operand 44 states and 519 transitions. [2024-01-27 15:06:22,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 531 transitions, 10478 flow [2024-01-27 15:06:22,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 531 transitions, 9553 flow, removed 435 selfloop flow, removed 23 redundant places. [2024-01-27 15:06:22,998 INFO L231 Difference]: Finished difference. Result has 287 places, 291 transitions, 5077 flow [2024-01-27 15:06:22,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=3244, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=5077, PETRI_PLACES=287, PETRI_TRANSITIONS=291} [2024-01-27 15:06:22,998 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 261 predicate places. [2024-01-27 15:06:22,999 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 291 transitions, 5077 flow [2024-01-27 15:06:22,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 7.290322580645161) internal successors, (226), 31 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:22,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:22,999 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:23,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-27 15:06:23,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:23,212 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:23,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:23,212 INFO L85 PathProgramCache]: Analyzing trace with hash 847140754, now seen corresponding path program 7 times [2024-01-27 15:06:23,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:23,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847368964] [2024-01-27 15:06:23,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:23,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:23,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:23,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847368964] [2024-01-27 15:06:23,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847368964] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:23,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392880774] [2024-01-27 15:06:23,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:06:23,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:23,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:23,588 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:23,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:06:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:23,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:06:23,660 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:23,793 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:23,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:24,097 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:24,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392880774] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:24,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:24,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2024-01-27 15:06:24,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496487433] [2024-01-27 15:06:24,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:24,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-01-27 15:06:24,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:24,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-01-27 15:06:24,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=999, Unknown=0, NotChecked=0, Total=1190 [2024-01-27 15:06:24,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:24,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 291 transitions, 5077 flow. Second operand has 35 states, 35 states have (on average 7.314285714285714) internal successors, (256), 35 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:24,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:24,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:24,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:26,582 INFO L124 PetriNetUnfolderBase]: 3766/7509 cut-off events. [2024-01-27 15:06:26,582 INFO L125 PetriNetUnfolderBase]: For 844748/844754 co-relation queries the response was YES. [2024-01-27 15:06:26,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63842 conditions, 7509 events. 3766/7509 cut-off events. For 844748/844754 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 46316 event pairs, 186 based on Foata normal form. 87/7595 useless extension candidates. Maximal degree in co-relation 63717. Up to 1698 conditions per place. [2024-01-27 15:06:26,645 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 195 selfloop transitions, 282 changer transitions 139/619 dead transitions. [2024-01-27 15:06:26,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 619 transitions, 13531 flow [2024-01-27 15:06:26,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-27 15:06:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-27 15:06:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 599 transitions. [2024-01-27 15:06:26,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49916666666666665 [2024-01-27 15:06:26,647 INFO L175 Difference]: Start difference. First operand has 287 places, 291 transitions, 5077 flow. Second operand 50 states and 599 transitions. [2024-01-27 15:06:26,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 619 transitions, 13531 flow [2024-01-27 15:06:28,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 619 transitions, 11989 flow, removed 684 selfloop flow, removed 30 redundant places. [2024-01-27 15:06:28,255 INFO L231 Difference]: Finished difference. Result has 318 places, 342 transitions, 6526 flow [2024-01-27 15:06:28,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=4331, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=6526, PETRI_PLACES=318, PETRI_TRANSITIONS=342} [2024-01-27 15:06:28,256 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 292 predicate places. [2024-01-27 15:06:28,256 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 342 transitions, 6526 flow [2024-01-27 15:06:28,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 7.314285714285714) internal successors, (256), 35 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:28,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:28,256 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:28,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-01-27 15:06:28,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-01-27 15:06:28,458 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:28,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:28,458 INFO L85 PathProgramCache]: Analyzing trace with hash -255979170, now seen corresponding path program 8 times [2024-01-27 15:06:28,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:28,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34406052] [2024-01-27 15:06:28,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:28,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:28,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34406052] [2024-01-27 15:06:28,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34406052] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:28,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373213811] [2024-01-27 15:06:28,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:06:28,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:28,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:28,737 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:28,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:06:28,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:06:28,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:28,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-27 15:06:28,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:28,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 0 proven. 201 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:29,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373213811] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:29,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:29,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 33 [2024-01-27 15:06:29,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647216572] [2024-01-27 15:06:29,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:29,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:06:29,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:29,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:06:29,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=930, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:06:29,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:29,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 342 transitions, 6526 flow. Second operand has 34 states, 34 states have (on average 7.205882352941177) internal successors, (245), 34 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:29,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:29,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:29,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:32,267 INFO L124 PetriNetUnfolderBase]: 5017/9784 cut-off events. [2024-01-27 15:06:32,267 INFO L125 PetriNetUnfolderBase]: For 1420293/1420299 co-relation queries the response was YES. [2024-01-27 15:06:32,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91996 conditions, 9784 events. 5017/9784 cut-off events. For 1420293/1420299 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 61987 event pairs, 96 based on Foata normal form. 87/9870 useless extension candidates. Maximal degree in co-relation 91858. Up to 2232 conditions per place. [2024-01-27 15:06:32,363 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 231 selfloop transitions, 375 changer transitions 137/746 dead transitions. [2024-01-27 15:06:32,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 746 transitions, 17285 flow [2024-01-27 15:06:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-01-27 15:06:32,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2024-01-27 15:06:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 698 transitions. [2024-01-27 15:06:32,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102339181286549 [2024-01-27 15:06:32,367 INFO L175 Difference]: Start difference. First operand has 318 places, 342 transitions, 6526 flow. Second operand 57 states and 698 transitions. [2024-01-27 15:06:32,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 746 transitions, 17285 flow [2024-01-27 15:06:34,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 746 transitions, 14641 flow, removed 1172 selfloop flow, removed 33 redundant places. [2024-01-27 15:06:34,208 INFO L231 Difference]: Finished difference. Result has 357 places, 420 transitions, 8399 flow [2024-01-27 15:06:34,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=57, PETRI_FLOW=8399, PETRI_PLACES=357, PETRI_TRANSITIONS=420} [2024-01-27 15:06:34,208 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 331 predicate places. [2024-01-27 15:06:34,209 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 420 transitions, 8399 flow [2024-01-27 15:06:34,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 7.205882352941177) internal successors, (245), 34 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:34,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:34,209 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:34,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-01-27 15:06:34,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:06:34,409 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:34,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:34,410 INFO L85 PathProgramCache]: Analyzing trace with hash -771066057, now seen corresponding path program 9 times [2024-01-27 15:06:34,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:34,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58559880] [2024-01-27 15:06:34,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:34,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:34,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:34,667 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:34,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:34,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58559880] [2024-01-27 15:06:34,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58559880] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:34,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986342024] [2024-01-27 15:06:34,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:06:34,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:34,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:34,669 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:34,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:06:34,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-01-27 15:06:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:34,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-27 15:06:34,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:34,825 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:34,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 224 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:06:35,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986342024] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:35,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:35,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-01-27 15:06:35,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609584339] [2024-01-27 15:06:35,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:35,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-01-27 15:06:35,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-01-27 15:06:35,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2024-01-27 15:06:35,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:35,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 420 transitions, 8399 flow. Second operand has 29 states, 29 states have (on average 7.344827586206897) internal successors, (213), 29 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:35,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:35,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:35,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:38,420 INFO L124 PetriNetUnfolderBase]: 5242/10280 cut-off events. [2024-01-27 15:06:38,420 INFO L125 PetriNetUnfolderBase]: For 1661090/1661096 co-relation queries the response was YES. [2024-01-27 15:06:38,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100103 conditions, 10280 events. 5242/10280 cut-off events. For 1661090/1661096 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 66045 event pairs, 258 based on Foata normal form. 60/10339 useless extension candidates. Maximal degree in co-relation 99948. Up to 2346 conditions per place. [2024-01-27 15:06:38,527 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 206 selfloop transitions, 388 changer transitions 124/721 dead transitions. [2024-01-27 15:06:38,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 721 transitions, 17301 flow [2024-01-27 15:06:38,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-01-27 15:06:38,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2024-01-27 15:06:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 618 transitions. [2024-01-27 15:06:38,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-01-27 15:06:38,529 INFO L175 Difference]: Start difference. First operand has 357 places, 420 transitions, 8399 flow. Second operand 51 states and 618 transitions. [2024-01-27 15:06:38,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 721 transitions, 17301 flow [2024-01-27 15:06:40,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 721 transitions, 14964 flow, removed 988 selfloop flow, removed 37 redundant places. [2024-01-27 15:06:40,902 INFO L231 Difference]: Finished difference. Result has 374 places, 446 transitions, 8979 flow [2024-01-27 15:06:40,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=6968, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=8979, PETRI_PLACES=374, PETRI_TRANSITIONS=446} [2024-01-27 15:06:40,903 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 348 predicate places. [2024-01-27 15:06:40,903 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 446 transitions, 8979 flow [2024-01-27 15:06:40,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 7.344827586206897) internal successors, (213), 29 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:40,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:40,903 INFO L208 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:40,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:06:41,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:06:41,104 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:41,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:41,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1415913161, now seen corresponding path program 10 times [2024-01-27 15:06:41,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:41,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211170088] [2024-01-27 15:06:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:41,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:41,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211170088] [2024-01-27 15:06:41,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211170088] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:41,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310939299] [2024-01-27 15:06:41,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:06:41,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:41,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:41,346 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:41,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:06:41,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:06:41,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:41,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-27 15:06:41,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:41,505 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:41,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:06:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:06:41,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310939299] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:06:41,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:06:41,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 29 [2024-01-27 15:06:41,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598606192] [2024-01-27 15:06:41,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:06:41,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-01-27 15:06:41,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:41,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-01-27 15:06:41,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=683, Unknown=0, NotChecked=0, Total=870 [2024-01-27 15:06:41,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 24 [2024-01-27 15:06:41,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 446 transitions, 8979 flow. Second operand has 30 states, 30 states have (on average 7.166666666666667) internal successors, (215), 30 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:41,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:41,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 24 [2024-01-27 15:06:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:45,356 INFO L124 PetriNetUnfolderBase]: 5305/10390 cut-off events. [2024-01-27 15:06:45,356 INFO L125 PetriNetUnfolderBase]: For 1829004/1829010 co-relation queries the response was YES. [2024-01-27 15:06:45,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103264 conditions, 10390 events. 5305/10390 cut-off events. For 1829004/1829010 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 66696 event pairs, 58 based on Foata normal form. 123/10512 useless extension candidates. Maximal degree in co-relation 103106. Up to 2358 conditions per place. [2024-01-27 15:06:45,461 INFO L140 encePairwiseOnDemand]: 18/24 looper letters, 216 selfloop transitions, 421 changer transitions 151/791 dead transitions. [2024-01-27 15:06:45,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 791 transitions, 19182 flow [2024-01-27 15:06:45,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-01-27 15:06:45,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2024-01-27 15:06:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 705 transitions. [2024-01-27 15:06:45,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5064655172413793 [2024-01-27 15:06:45,463 INFO L175 Difference]: Start difference. First operand has 374 places, 446 transitions, 8979 flow. Second operand 58 states and 705 transitions. [2024-01-27 15:06:45,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 791 transitions, 19182 flow [2024-01-27 15:06:48,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 791 transitions, 17700 flow, removed 618 selfloop flow, removed 25 redundant places. [2024-01-27 15:06:48,375 INFO L231 Difference]: Finished difference. Result has 417 places, 459 transitions, 9988 flow [2024-01-27 15:06:48,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7935, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=409, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=58, PETRI_FLOW=9988, PETRI_PLACES=417, PETRI_TRANSITIONS=459} [2024-01-27 15:06:48,376 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 391 predicate places. [2024-01-27 15:06:48,376 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 459 transitions, 9988 flow [2024-01-27 15:06:48,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.166666666666667) internal successors, (215), 30 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:48,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:06:48,377 INFO L208 CegarLoopForPetriNet]: trace histogram [11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:06:48,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:06:48,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:06:48,588 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:06:48,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:06:48,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1586073671, now seen corresponding path program 11 times [2024-01-27 15:06:48,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:06:48,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617534479] [2024-01-27 15:06:48,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:06:48,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:06:48,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:06:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 250 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:06:48,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:06:48,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617534479] [2024-01-27 15:06:48,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617534479] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:06:48,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374140226] [2024-01-27 15:06:48,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:06:48,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:06:48,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:06:48,706 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:06:48,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:06:48,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-01-27 15:06:48,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:06:48,773 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 12 conjunts are in the unsatisfiable core [2024-01-27 15:06:48,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:06:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:06:48,831 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-27 15:06:48,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [374140226] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:06:48,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-01-27 15:06:48,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2024-01-27 15:06:48,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506700284] [2024-01-27 15:06:48,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:06:48,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-01-27 15:06:48,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:06:48,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-01-27 15:06:48,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2024-01-27 15:06:48,838 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 24 [2024-01-27 15:06:48,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 459 transitions, 9988 flow. Second operand has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:06:48,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:06:48,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 24 [2024-01-27 15:06:48,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:06:57,521 INFO L124 PetriNetUnfolderBase]: 17098/33645 cut-off events. [2024-01-27 15:06:57,521 INFO L125 PetriNetUnfolderBase]: For 5078292/5081986 co-relation queries the response was YES. [2024-01-27 15:06:58,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 265422 conditions, 33645 events. 17098/33645 cut-off events. For 5078292/5081986 co-relation queries the response was YES. Maximal size of possible extension queue 665. Compared 299678 event pairs, 859 based on Foata normal form. 633/30411 useless extension candidates. Maximal degree in co-relation 265260. Up to 5998 conditions per place. [2024-01-27 15:06:58,274 INFO L140 encePairwiseOnDemand]: 20/24 looper letters, 0 selfloop transitions, 0 changer transitions 519/519 dead transitions. [2024-01-27 15:06:58,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 519 transitions, 8971 flow [2024-01-27 15:06:58,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:06:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:06:58,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 237 transitions. [2024-01-27 15:06:58,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7596153846153846 [2024-01-27 15:06:58,281 INFO L175 Difference]: Start difference. First operand has 417 places, 459 transitions, 9988 flow. Second operand 13 states and 237 transitions. [2024-01-27 15:06:58,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 519 transitions, 8971 flow [2024-01-27 15:07:02,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 519 transitions, 7705 flow, removed 219 selfloop flow, removed 65 redundant places. [2024-01-27 15:07:02,781 INFO L231 Difference]: Finished difference. Result has 348 places, 0 transitions, 0 flow [2024-01-27 15:07:02,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=24, PETRI_DIFFERENCE_MINUEND_FLOW=7283, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=0, PETRI_PLACES=348, PETRI_TRANSITIONS=0} [2024-01-27 15:07:02,782 INFO L281 CegarLoopForPetriNet]: 26 programPoint places, 322 predicate places. [2024-01-27 15:07:02,782 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 0 transitions, 0 flow [2024-01-27 15:07:02,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.846153846153847) internal successors, (167), 13 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:07:02,784 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-01-27 15:07:02,785 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2024-01-27 15:07:02,785 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2024-01-27 15:07:02,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-27 15:07:02,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:07:02,985 INFO L445 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1] [2024-01-27 15:07:02,988 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-01-27 15:07:02,989 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-01-27 15:07:02,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.01 03:07:02 BasicIcfg [2024-01-27 15:07:02,992 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-01-27 15:07:02,992 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-01-27 15:07:02,992 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-01-27 15:07:02,993 INFO L274 PluginConnector]: Witness Printer initialized [2024-01-27 15:07:02,993 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:06:05" (3/4) ... [2024-01-27 15:07:02,994 INFO L137 WitnessPrinter]: Generating witness for correct program [2024-01-27 15:07:02,997 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2024-01-27 15:07:02,997 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2024-01-27 15:07:03,001 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 32 nodes and edges [2024-01-27 15:07:03,001 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-01-27 15:07:03,001 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-01-27 15:07:03,001 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-01-27 15:07:03,058 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2024-01-27 15:07:03,059 INFO L149 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.yml [2024-01-27 15:07:03,059 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-01-27 15:07:03,059 INFO L158 Benchmark]: Toolchain (without parser) took 57989.95ms. Allocated memory was 159.4MB in the beginning and 10.4GB in the end (delta: 10.2GB). Free memory was 102.2MB in the beginning and 7.6GB in the end (delta: -7.5GB). Peak memory consumption was 2.7GB. Max. memory is 16.1GB. [2024-01-27 15:07:03,060 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-01-27 15:07:03,060 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.22ms. Allocated memory is still 159.4MB. Free memory was 102.2MB in the beginning and 82.1MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2024-01-27 15:07:03,060 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.58ms. Allocated memory is still 159.4MB. Free memory was 82.1MB in the beginning and 80.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:07:03,060 INFO L158 Benchmark]: Boogie Preprocessor took 58.33ms. Allocated memory is still 159.4MB. Free memory was 80.1MB in the beginning and 78.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-01-27 15:07:03,060 INFO L158 Benchmark]: RCFGBuilder took 372.54ms. Allocated memory is still 159.4MB. Free memory was 78.0MB in the beginning and 57.6MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2024-01-27 15:07:03,061 INFO L158 Benchmark]: TraceAbstraction took 57033.29ms. Allocated memory was 159.4MB in the beginning and 10.4GB in the end (delta: 10.2GB). Free memory was 57.0MB in the beginning and 7.7GB in the end (delta: -7.6GB). Peak memory consumption was 2.7GB. Max. memory is 16.1GB. [2024-01-27 15:07:03,061 INFO L158 Benchmark]: Witness Printer took 66.57ms. Allocated memory is still 10.4GB. Free memory was 7.7GB in the beginning and 7.6GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-01-27 15:07:03,062 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 125.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 407.22ms. Allocated memory is still 159.4MB. Free memory was 102.2MB in the beginning and 82.1MB in the end (delta: 20.1MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 44.58ms. Allocated memory is still 159.4MB. Free memory was 82.1MB in the beginning and 80.1MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 58.33ms. Allocated memory is still 159.4MB. Free memory was 80.1MB in the beginning and 78.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 372.54ms. Allocated memory is still 159.4MB. Free memory was 78.0MB in the beginning and 57.6MB in the end (delta: 20.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 57033.29ms. Allocated memory was 159.4MB in the beginning and 10.4GB in the end (delta: 10.2GB). Free memory was 57.0MB in the beginning and 7.7GB in the end (delta: -7.6GB). Peak memory consumption was 2.7GB. Max. memory is 16.1GB. * Witness Printer took 66.57ms. Allocated memory is still 10.4GB. Free memory was 7.7GB in the beginning and 7.6GB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 722]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 34 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 56.9s, OverallIterations: 17, TraceHistogramMax: 11, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 46.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6562 SdHoareTripleChecker+Valid, 4.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6540 mSDsluCounter, 256 SdHoareTripleChecker+Invalid, 3.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 250 mSDsCounter, 398 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7733 IncrementalHoareTripleChecker+Invalid, 8131 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 398 mSolverCounterUnsat, 6 mSDtfsCounter, 7733 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1721 GetRequests, 976 SyntacticMatches, 36 SemanticMatches, 709 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12217 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9988occurred in iteration=16, InterpolantAutomatonStates: 517, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 1245 NumberOfCodeBlocks, 1245 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 1724 ConstructedInterpolants, 0 QuantifiedInterpolants, 7608 SizeOfPredicates, 143 NumberOfNonLiveVariables, 2005 ConjunctsInSsa, 210 ConjunctsInUnsatCore, 40 InterpolantComputations, 6 PerfectInterpolantSequences, 576/4636 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-01-27 15:07:03,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE