./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread/fib_safe-12.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a 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/fib_safe-12.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 e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:01:33,655 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:01:33,713 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:01:33,719 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:01:33,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:01:33,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:01:33,757 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:01:33,757 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:01:33,758 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:01:33,759 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:01:33,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:01:33,760 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:01:33,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:01:33,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:01:33,764 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:01:33,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:01:33,764 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:01:33,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:01:33,765 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:01:33,765 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:01:33,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:01:33,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:01:33,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:01:33,766 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:01:33,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:01:33,766 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:01:33,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:01:33,767 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:01:33,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:01:33,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:01:33,768 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:01:33,768 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:01:33,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:01:33,769 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:01:33,769 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:01:33,769 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:01:33,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:01:33,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:01:33,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:01:33,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:01:33,771 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:01:33,771 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:01:33,771 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:01:33,771 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e169a35d3412f69777e600b250d6db82170a9573bed36816bd393f67ca1b5302 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:01:34,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:01:34,070 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:01:34,072 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:01:34,073 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:01:34,073 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:01:34,074 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_safe-12.i [2024-02-19 14:01:35,062 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:01:35,254 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:01:35,255 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_safe-12.i [2024-02-19 14:01:35,278 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7084ff75b/69708adf428a42c0a44be182457dff25/FLAGfd9a1d347 [2024-02-19 14:01:35,293 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7084ff75b/69708adf428a42c0a44be182457dff25 [2024-02-19 14:01:35,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:01:35,297 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:01:35,300 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:01:35,300 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:01:35,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:01:35,304 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@326c0a6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35, skipping insertion in model container [2024-02-19 14:01:35,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,352 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:01:35,553 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/fib_safe-12.i[30241,30254] [2024-02-19 14:01:35,569 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:01:35,580 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:01:35,616 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/fib_safe-12.i[30241,30254] [2024-02-19 14:01:35,622 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:01:35,651 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:01:35,651 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35 WrapperNode [2024-02-19 14:01:35,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:01:35,652 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:01:35,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:01:35,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:01:35,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,667 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,680 INFO L138 Inliner]: procedures = 165, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 74 [2024-02-19 14:01:35,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:01:35,681 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:01:35,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:01:35,681 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:01:35,697 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,697 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,700 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,716 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]. [2024-02-19 14:01:35,730 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,731 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,735 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,745 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,750 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,751 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:01:35,758 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:01:35,758 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:01:35,758 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:01:35,759 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (1/1) ... [2024-02-19 14:01:35,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:01:35,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:35,798 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) [2024-02-19 14:01:35,820 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 [2024-02-19 14:01:35,840 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-02-19 14:01:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-02-19 14:01:35,841 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-02-19 14:01:35,841 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-02-19 14:01:35,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:01:35,841 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:01:35,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-02-19 14:01:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-02-19 14:01:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:01:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:01:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:01:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:01:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:01:35,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-02-19 14:01:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-02-19 14:01:35,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:01:35,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:01:35,845 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:01:35,976 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:01:35,979 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:01:36,158 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:01:36,159 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:01:36,248 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:01:36,248 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-02-19 14:01:36,249 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:01:36 BoogieIcfgContainer [2024-02-19 14:01:36,249 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:01:36,251 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:01:36,251 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:01:36,254 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:01:36,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:01:35" (1/3) ... [2024-02-19 14:01:36,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485c625b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:01:36, skipping insertion in model container [2024-02-19 14:01:36,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:01:35" (2/3) ... [2024-02-19 14:01:36,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485c625b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:01:36, skipping insertion in model container [2024-02-19 14:01:36,255 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:01:36" (3/3) ... [2024-02-19 14:01:36,257 INFO L112 eAbstractionObserver]: Analyzing ICFG fib_safe-12.i [2024-02-19 14:01:36,273 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:01:36,273 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:01:36,273 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:01:36,302 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:01:36,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 32 places, 29 transitions, 66 flow [2024-02-19 14:01:36,347 INFO L124 PetriNetUnfolderBase]: 4/27 cut-off events. [2024-02-19 14:01:36,347 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:01:36,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34 conditions, 27 events. 4/27 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 27 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-02-19 14:01:36,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 32 places, 29 transitions, 66 flow [2024-02-19 14:01:36,351 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 27 transitions, 60 flow [2024-02-19 14:01:36,365 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:01:36,372 INFO L369 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=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@b739c4d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:01:36,372 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 14:01:36,389 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:01:36,389 INFO L124 PetriNetUnfolderBase]: 4/25 cut-off events. [2024-02-19 14:01:36,389 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:01:36,389 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:36,390 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:36,391 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:36,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:36,395 INFO L85 PathProgramCache]: Analyzing trace with hash -369539475, now seen corresponding path program 1 times [2024-02-19 14:01:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:36,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010886906] [2024-02-19 14:01:36,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:36,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:36,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:36,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:36,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010886906] [2024-02-19 14:01:36,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010886906] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:01:36,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:01:36,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:01:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957249594] [2024-02-19 14:01:36,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:01:36,666 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:01:36,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:01:36,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:01:36,757 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:36,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 27 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:36,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:36,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:36,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:36,862 INFO L124 PetriNetUnfolderBase]: 115/223 cut-off events. [2024-02-19 14:01:36,862 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-02-19 14:01:36,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 223 events. 115/223 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 689 event pairs, 20 based on Foata normal form. 9/209 useless extension candidates. Maximal degree in co-relation 398. Up to 118 conditions per place. [2024-02-19 14:01:36,867 INFO L140 encePairwiseOnDemand]: 25/29 looper letters, 20 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2024-02-19 14:01:36,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 33 transitions, 118 flow [2024-02-19 14:01:36,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:01:36,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:01:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-02-19 14:01:36,878 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.7011494252873564 [2024-02-19 14:01:36,881 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 2 predicate places. [2024-02-19 14:01:36,881 INFO L507 AbstractCegarLoop]: Abstraction has has 32 places, 33 transitions, 118 flow [2024-02-19 14:01:36,882 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.666666666666666) internal successors, (44), 3 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:36,882 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:36,882 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:36,883 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:01:36,883 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:36,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:36,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1403763973, now seen corresponding path program 1 times [2024-02-19 14:01:36,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:36,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452868267] [2024-02-19 14:01:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:36,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:36,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:36,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452868267] [2024-02-19 14:01:36,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452868267] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:36,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285505792] [2024-02-19 14:01:36,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:36,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:36,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:36,987 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) [2024-02-19 14:01:36,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-02-19 14:01:37,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:37,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 3 conjunts are in the unsatisfiable core [2024-02-19 14:01:37,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:37,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:37,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:37,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285505792] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:37,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:37,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-02-19 14:01:37,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244824702] [2024-02-19 14:01:37,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:37,132 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-02-19 14:01:37,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-02-19 14:01:37,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-02-19 14:01:37,133 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:37,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 33 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:37,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:37,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:37,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:37,224 INFO L124 PetriNetUnfolderBase]: 169/306 cut-off events. [2024-02-19 14:01:37,224 INFO L125 PetriNetUnfolderBase]: For 35/65 co-relation queries the response was YES. [2024-02-19 14:01:37,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 835 conditions, 306 events. 169/306 cut-off events. For 35/65 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 909 event pairs, 20 based on Foata normal form. 6/288 useless extension candidates. Maximal degree in co-relation 817. Up to 199 conditions per place. [2024-02-19 14:01:37,226 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 38 selfloop transitions, 5 changer transitions 1/54 dead transitions. [2024-02-19 14:01:37,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 54 transitions, 290 flow [2024-02-19 14:01:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-02-19 14:01:37,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-02-19 14:01:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-02-19 14:01:37,235 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6839080459770115 [2024-02-19 14:01:37,236 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-02-19 14:01:37,237 INFO L507 AbstractCegarLoop]: Abstraction has has 37 places, 54 transitions, 290 flow [2024-02-19 14:01:37,237 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.0) internal successors, (98), 7 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:37,237 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:37,238 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:37,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-02-19 14:01:37,444 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:37,445 INFO L432 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:37,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash -30528403, now seen corresponding path program 2 times [2024-02-19 14:01:37,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:37,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344854460] [2024-02-19 14:01:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:37,561 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344854460] [2024-02-19 14:01:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344854460] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:37,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622929749] [2024-02-19 14:01:37,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-02-19 14:01:37,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:37,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:37,564 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) [2024-02-19 14:01:37,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-02-19 14:01:37,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-02-19 14:01:37,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:01:37,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 6 conjunts are in the unsatisfiable core [2024-02-19 14:01:37,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:37,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:37,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622929749] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:37,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:37,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-02-19 14:01:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779112406] [2024-02-19 14:01:37,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:37,689 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-02-19 14:01:37,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-02-19 14:01:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2024-02-19 14:01:37,690 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:37,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 54 transitions, 290 flow. Second operand has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:37,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:37,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:37,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:37,861 INFO L124 PetriNetUnfolderBase]: 277/472 cut-off events. [2024-02-19 14:01:37,861 INFO L125 PetriNetUnfolderBase]: For 103/139 co-relation queries the response was YES. [2024-02-19 14:01:37,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1746 conditions, 472 events. 277/472 cut-off events. For 103/139 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1344 event pairs, 20 based on Foata normal form. 18/470 useless extension candidates. Maximal degree in co-relation 1724. Up to 361 conditions per place. [2024-02-19 14:01:37,868 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 74 selfloop transitions, 11 changer transitions 1/96 dead transitions. [2024-02-19 14:01:37,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 96 transitions, 714 flow [2024-02-19 14:01:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-02-19 14:01:37,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-02-19 14:01:37,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 236 transitions. [2024-02-19 14:01:37,872 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6781609195402298 [2024-02-19 14:01:37,873 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 18 predicate places. [2024-02-19 14:01:37,873 INFO L507 AbstractCegarLoop]: Abstraction has has 48 places, 96 transitions, 714 flow [2024-02-19 14:01:37,873 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 13.538461538461538) internal successors, (176), 13 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:37,873 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:37,873 INFO L234 CegarLoopForPetriNet]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:37,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-02-19 14:01:38,086 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-02-19 14:01:38,087 INFO L432 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:38,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:38,087 INFO L85 PathProgramCache]: Analyzing trace with hash -246684307, now seen corresponding path program 3 times [2024-02-19 14:01:38,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:38,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94669198] [2024-02-19 14:01:38,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:38,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:38,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:38,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94669198] [2024-02-19 14:01:38,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94669198] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:38,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229642889] [2024-02-19 14:01:38,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-02-19 14:01:38,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:38,310 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:38,311 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) [2024-02-19 14:01:38,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-02-19 14:01:38,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-02-19 14:01:38,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:01:38,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 12 conjunts are in the unsatisfiable core [2024-02-19 14:01:38,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:38,417 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:38,417 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:38,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229642889] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:38,563 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:38,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-02-19 14:01:38,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125294651] [2024-02-19 14:01:38,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:38,564 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-02-19 14:01:38,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:38,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-02-19 14:01:38,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-02-19 14:01:38,566 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:38,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 96 transitions, 714 flow. Second operand has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:38,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:38,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:38,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:38,799 INFO L124 PetriNetUnfolderBase]: 493/798 cut-off events. [2024-02-19 14:01:38,799 INFO L125 PetriNetUnfolderBase]: For 218/278 co-relation queries the response was YES. [2024-02-19 14:01:38,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3789 conditions, 798 events. 493/798 cut-off events. For 218/278 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2160 event pairs, 20 based on Foata normal form. 18/795 useless extension candidates. Maximal degree in co-relation 3763. Up to 685 conditions per place. [2024-02-19 14:01:38,804 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 146 selfloop transitions, 23 changer transitions 1/180 dead transitions. [2024-02-19 14:01:38,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 180 transitions, 1726 flow [2024-02-19 14:01:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-02-19 14:01:38,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-02-19 14:01:38,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 470 transitions. [2024-02-19 14:01:38,807 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6752873563218391 [2024-02-19 14:01:38,808 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 41 predicate places. [2024-02-19 14:01:38,808 INFO L507 AbstractCegarLoop]: Abstraction has has 71 places, 180 transitions, 1726 flow [2024-02-19 14:01:38,809 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 13.28) internal successors, (332), 25 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:38,809 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:38,809 INFO L234 CegarLoopForPetriNet]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:38,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-02-19 14:01:39,036 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:39,037 INFO L432 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:39,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1697966227, now seen corresponding path program 4 times [2024-02-19 14:01:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:39,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808931906] [2024-02-19 14:01:39,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:39,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:39,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:39,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:39,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808931906] [2024-02-19 14:01:39,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808931906] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:39,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994949751] [2024-02-19 14:01:39,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-02-19 14:01:39,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:39,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:39,448 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) [2024-02-19 14:01:39,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-02-19 14:01:39,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-02-19 14:01:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:01:39,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 24 conjunts are in the unsatisfiable core [2024-02-19 14:01:39,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:39,586 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:39,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:39,889 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:39,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994949751] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:39,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:39,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 29 [2024-02-19 14:01:39,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122134454] [2024-02-19 14:01:39,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:39,891 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-02-19 14:01:39,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-02-19 14:01:39,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2024-02-19 14:01:39,892 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 29 [2024-02-19 14:01:39,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 180 transitions, 1726 flow. Second operand has 29 states, 29 states have (on average 13.275862068965518) internal successors, (385), 29 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:39,893 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:39,893 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 29 [2024-02-19 14:01:39,893 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:01:40,174 INFO L124 PetriNetUnfolderBase]: 565/906 cut-off events. [2024-02-19 14:01:40,174 INFO L125 PetriNetUnfolderBase]: For 362/434 co-relation queries the response was YES. [2024-02-19 14:01:40,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5182 conditions, 906 events. 565/906 cut-off events. For 362/434 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2430 event pairs, 20 based on Foata normal form. 18/903 useless extension candidates. Maximal degree in co-relation 5152. Up to 793 conditions per place. [2024-02-19 14:01:40,182 INFO L140 encePairwiseOnDemand]: 26/29 looper letters, 170 selfloop transitions, 27 changer transitions 1/208 dead transitions. [2024-02-19 14:01:40,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 208 transitions, 2402 flow [2024-02-19 14:01:40,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-02-19 14:01:40,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2024-02-19 14:01:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 538 transitions. [2024-02-19 14:01:40,185 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.6625615763546798 [2024-02-19 14:01:40,187 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 68 predicate places. [2024-02-19 14:01:40,187 INFO L507 AbstractCegarLoop]: Abstraction has has 98 places, 208 transitions, 2402 flow [2024-02-19 14:01:40,188 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 13.275862068965518) internal successors, (385), 29 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:40,188 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:01:40,188 INFO L234 CegarLoopForPetriNet]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:01:40,201 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-02-19 14:01:40,399 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:40,399 INFO L432 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:01:40,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:01:40,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1605336429, now seen corresponding path program 5 times [2024-02-19 14:01:40,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:01:40,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406665842] [2024-02-19 14:01:40,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:01:40,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:01:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:01:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:41,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:01:41,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406665842] [2024-02-19 14:01:41,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406665842] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:01:41,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343958100] [2024-02-19 14:01:41,973 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-02-19 14:01:41,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:01:41,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:01:41,974 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) [2024-02-19 14:01:41,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-02-19 14:01:42,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-02-19 14:01:42,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-02-19 14:01:42,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 89 conjunts are in the unsatisfiable core [2024-02-19 14:01:42,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:01:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 300 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:43,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:01:45,327 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:01:45,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343958100] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:01:45,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:01:45,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 97 [2024-02-19 14:01:45,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547275363] [2024-02-19 14:01:45,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:01:45,329 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-02-19 14:01:45,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:01:45,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-02-19 14:01:45,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=8123, Unknown=0, NotChecked=0, Total=9506 [2024-02-19 14:01:45,528 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-19 14:01:45,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 208 transitions, 2402 flow. Second operand has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:01:45,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:01:45,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-19 14:01:45,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:02:39,121 INFO L124 PetriNetUnfolderBase]: 43567/70389 cut-off events. [2024-02-19 14:02:39,122 INFO L125 PetriNetUnfolderBase]: For 199065/199065 co-relation queries the response was YES. [2024-02-19 14:02:39,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 383290 conditions, 70389 events. 43567/70389 cut-off events. For 199065/199065 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 485355 event pairs, 68 based on Foata normal form. 0/69206 useless extension candidates. Maximal degree in co-relation 383254. Up to 47468 conditions per place. [2024-02-19 14:02:39,647 INFO L140 encePairwiseOnDemand]: 17/29 looper letters, 7362 selfloop transitions, 1701 changer transitions 1340/10406 dead transitions. [2024-02-19 14:02:39,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 10406 transitions, 137333 flow [2024-02-19 14:02:39,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 309 states. [2024-02-19 14:02:39,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 309 states. [2024-02-19 14:02:39,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 4253 transitions. [2024-02-19 14:02:39,658 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.47461220845887736 [2024-02-19 14:02:39,659 INFO L308 CegarLoopForPetriNet]: 30 programPoint places, 376 predicate places. [2024-02-19 14:02:39,659 INFO L507 AbstractCegarLoop]: Abstraction has has 406 places, 10406 transitions, 137333 flow [2024-02-19 14:02:39,659 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 6.163265306122449) internal successors, (604), 98 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:02:39,659 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:02:39,660 INFO L234 CegarLoopForPetriNet]: trace histogram [26, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:02:39,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-02-19 14:02:39,874 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:02:39,875 INFO L432 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-02-19 14:02:39,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:02:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1836412253, now seen corresponding path program 1 times [2024-02-19 14:02:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:02:39,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021107759] [2024-02-19 14:02:39,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:02:39,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:02:39,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:02:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:02:41,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:02:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021107759] [2024-02-19 14:02:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021107759] provided 0 perfect and 1 imperfect interpolant sequences [2024-02-19 14:02:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66828742] [2024-02-19 14:02:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:02:41,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-02-19 14:02:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:02:41,521 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) [2024-02-19 14:02:41,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-02-19 14:02:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:02:41,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 91 conjunts are in the unsatisfiable core [2024-02-19 14:02:41,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-02-19 14:02:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 300 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:02:43,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-02-19 14:02:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 0 proven. 353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:02:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66828742] provided 0 perfect and 2 imperfect interpolant sequences [2024-02-19 14:02:44,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-02-19 14:02:44,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 103 [2024-02-19 14:02:44,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010582084] [2024-02-19 14:02:44,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-02-19 14:02:44,936 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-02-19 14:02:44,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:02:44,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-02-19 14:02:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1443, Invalid=9269, Unknown=0, NotChecked=0, Total=10712 [2024-02-19 14:02:45,034 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 29 [2024-02-19 14:02:45,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 10406 transitions, 137333 flow. Second operand has 104 states, 104 states have (on average 6.211538461538462) internal successors, (646), 104 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:02:45,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:02:45,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 29 [2024-02-19 14:02:45,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand