./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c -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 ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 10:31:51,551 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 10:31:51,629 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-10 10:31:51,634 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 10:31:51,635 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 10:31:51,664 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 10:31:51,666 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 10:31:51,666 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 10:31:51,667 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 10:31:51,668 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 10:31:51,669 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 10:31:51,669 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 10:31:51,670 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 10:31:51,671 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 10:31:51,672 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 10:31:51,672 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 10:31:51,672 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-10 10:31:51,672 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 10:31:51,673 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 10:31:51,673 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 10:31:51,673 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 10:31:51,677 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-10 10:31:51,677 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 10:31:51,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-10 10:31:51,678 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 10:31:51,678 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 10:31:51,678 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-10 10:31:51,679 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 10:31:51,679 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 10:31:51,679 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 10:31:51,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 10:31:51,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 10:31:51,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:31:51,681 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 10:31:51,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 10:31:51,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-10 10:31:51,681 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 10:31:51,681 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 10:31:51,681 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 10:31:51,682 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 10:31:51,682 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 10:31:51,682 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 10:31:51,683 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec2334e7e9ec2636c6abf161aed91fff94fbff3709d38c7edad92256c3b5dc81 [2024-11-10 10:31:51,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 10:31:52,004 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 10:31:52,007 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 10:31:52,009 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 10:31:52,010 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 10:31:52,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2024-11-10 10:31:53,501 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 10:31:53,718 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 10:31:53,719 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c [2024-11-10 10:31:53,733 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1a14e17/4b204a07f1074aff8ba8e19cc3aef705/FLAG60a0f8cb3 [2024-11-10 10:31:54,092 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9e1a14e17/4b204a07f1074aff8ba8e19cc3aef705 [2024-11-10 10:31:54,094 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 10:31:54,096 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 10:31:54,097 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 10:31:54,097 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 10:31:54,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 10:31:54,102 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,103 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d886a91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54, skipping insertion in model container [2024-11-10 10:31:54,104 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,135 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 10:31:54,387 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5898,5911] [2024-11-10 10:31:54,399 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:31:54,408 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 10:31:54,437 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-2.wvr.c[5898,5911] [2024-11-10 10:31:54,440 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 10:31:54,457 INFO L204 MainTranslator]: Completed translation [2024-11-10 10:31:54,458 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54 WrapperNode [2024-11-10 10:31:54,458 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 10:31:54,459 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 10:31:54,459 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 10:31:54,460 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 10:31:54,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,511 INFO L138 Inliner]: procedures = 25, calls = 73, calls flagged for inlining = 27, calls inlined = 33, statements flattened = 453 [2024-11-10 10:31:54,515 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 10:31:54,516 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 10:31:54,516 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 10:31:54,516 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 10:31:54,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,536 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,557 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-10 10:31:54,558 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,558 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,571 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,572 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,575 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,577 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 10:31:54,588 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 10:31:54,588 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 10:31:54,588 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 10:31:54,589 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (1/1) ... [2024-11-10 10:31:54,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 10:31:54,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 10:31:54,646 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) [2024-11-10 10:31:54,659 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 [2024-11-10 10:31:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 10:31:54,712 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 10:31:54,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 10:31:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 10:31:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 10:31:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 10:31:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 10:31:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-10 10:31:54,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-10 10:31:54,714 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 10:31:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 10:31:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 10:31:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 10:31:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 10:31:54,715 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 10:31:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 10:31:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 10:31:54,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 10:31:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 10:31:54,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 10:31:54,720 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 10:31:54,893 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 10:31:54,896 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 10:31:55,548 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 10:31:55,549 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 10:31:56,036 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 10:31:56,036 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 10:31:56,037 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:31:56 BoogieIcfgContainer [2024-11-10 10:31:56,037 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 10:31:56,040 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 10:31:56,040 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 10:31:56,044 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 10:31:56,044 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 10:31:54" (1/3) ... [2024-11-10 10:31:56,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7833956b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:31:56, skipping insertion in model container [2024-11-10 10:31:56,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 10:31:54" (2/3) ... [2024-11-10 10:31:56,045 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7833956b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 10:31:56, skipping insertion in model container [2024-11-10 10:31:56,045 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 10:31:56" (3/3) ... [2024-11-10 10:31:56,048 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-2.wvr.c [2024-11-10 10:31:56,068 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 10:31:56,069 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-10 10:31:56,069 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 10:31:56,147 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-10 10:31:56,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 76 transitions, 180 flow [2024-11-10 10:31:56,239 INFO L124 PetriNetUnfolderBase]: 16/72 cut-off events. [2024-11-10 10:31:56,240 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 10:31:56,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 72 events. 16/72 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 130 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 61. Up to 2 conditions per place. [2024-11-10 10:31:56,245 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 76 transitions, 180 flow [2024-11-10 10:31:56,249 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 71 transitions, 166 flow [2024-11-10 10:31:56,263 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 10:31:56,270 INFO L333 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, 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;@4fc2a50, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 10:31:56,271 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-11-10 10:31:56,314 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 10:31:56,315 INFO L124 PetriNetUnfolderBase]: 16/70 cut-off events. [2024-11-10 10:31:56,315 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-10 10:31:56,315 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:31:56,316 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:31:56,316 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:31:56,323 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:31:56,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1730656297, now seen corresponding path program 1 times [2024-11-10 10:31:56,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:31:56,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426136708] [2024-11-10 10:31:56,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:31:56,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:31:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:31:56,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:31:56,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:31:56,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426136708] [2024-11-10 10:31:56,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426136708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:31:56,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:31:56,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:31:56,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580274246] [2024-11-10 10:31:56,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:31:56,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-10 10:31:56,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:31:56,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-10 10:31:56,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-10 10:31:56,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 76 [2024-11-10 10:31:56,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 71 transitions, 166 flow. Second operand has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:31:56,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:31:56,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 76 [2024-11-10 10:31:56,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:01,141 INFO L124 PetriNetUnfolderBase]: 30634/39849 cut-off events. [2024-11-10 10:32:01,141 INFO L125 PetriNetUnfolderBase]: For 1535/1535 co-relation queries the response was YES. [2024-11-10 10:32:01,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81240 conditions, 39849 events. 30634/39849 cut-off events. For 1535/1535 co-relation queries the response was YES. Maximal size of possible extension queue 1312. Compared 205961 event pairs, 26104 based on Foata normal form. 4/35176 useless extension candidates. Maximal degree in co-relation 77733. Up to 39730 conditions per place. [2024-11-10 10:32:01,456 INFO L140 encePairwiseOnDemand]: 68/76 looper letters, 50 selfloop transitions, 0 changer transitions 0/63 dead transitions. [2024-11-10 10:32:01,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 250 flow [2024-11-10 10:32:01,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-10 10:32:01,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-10 10:32:01,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 92 transitions. [2024-11-10 10:32:01,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6052631578947368 [2024-11-10 10:32:01,471 INFO L175 Difference]: Start difference. First operand has 68 places, 71 transitions, 166 flow. Second operand 2 states and 92 transitions. [2024-11-10 10:32:01,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 250 flow [2024-11-10 10:32:01,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 63 transitions, 234 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-10 10:32:01,503 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 134 flow [2024-11-10 10:32:01,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=134, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-11-10 10:32:01,510 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2024-11-10 10:32:01,512 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 134 flow [2024-11-10 10:32:01,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 32.0) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:01,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:01,513 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:01,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 10:32:01,514 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:32:01,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:01,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1741234826, now seen corresponding path program 1 times [2024-11-10 10:32:01,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:01,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145988746] [2024-11-10 10:32:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:01,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:01,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:01,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145988746] [2024-11-10 10:32:01,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145988746] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:01,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:01,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:32:01,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747273886] [2024-11-10 10:32:01,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:01,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:32:01,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:01,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:32:01,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:32:01,873 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 76 [2024-11-10 10:32:01,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:01,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:01,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 76 [2024-11-10 10:32:01,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:05,398 INFO L124 PetriNetUnfolderBase]: 37721/48988 cut-off events. [2024-11-10 10:32:05,399 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2024-11-10 10:32:05,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98687 conditions, 48988 events. 37721/48988 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 1687. Compared 272196 event pairs, 8399 based on Foata normal form. 1/42930 useless extension candidates. Maximal degree in co-relation 98684. Up to 41703 conditions per place. [2024-11-10 10:32:05,623 INFO L140 encePairwiseOnDemand]: 70/76 looper letters, 76 selfloop transitions, 5 changer transitions 1/95 dead transitions. [2024-11-10 10:32:05,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 369 flow [2024-11-10 10:32:05,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:32:05,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:32:05,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 134 transitions. [2024-11-10 10:32:05,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5877192982456141 [2024-11-10 10:32:05,629 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 134 flow. Second operand 3 states and 134 transitions. [2024-11-10 10:32:05,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 369 flow [2024-11-10 10:32:05,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 369 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-10 10:32:05,633 INFO L231 Difference]: Finished difference. Result has 64 places, 67 transitions, 167 flow [2024-11-10 10:32:05,634 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=167, PETRI_PLACES=64, PETRI_TRANSITIONS=67} [2024-11-10 10:32:05,635 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2024-11-10 10:32:05,635 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 67 transitions, 167 flow [2024-11-10 10:32:05,635 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:05,636 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:05,637 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:05,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 10:32:05,638 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:32:05,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:05,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1298465632, now seen corresponding path program 1 times [2024-11-10 10:32:05,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:05,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360659066] [2024-11-10 10:32:05,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:05,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:05,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:05,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:05,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:05,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360659066] [2024-11-10 10:32:05,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360659066] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:05,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:05,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:32:05,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861556722] [2024-11-10 10:32:05,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:05,811 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:32:05,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:05,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:32:05,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:32:05,813 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 76 [2024-11-10 10:32:05,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 67 transitions, 167 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:05,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:05,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 76 [2024-11-10 10:32:05,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:10,585 INFO L124 PetriNetUnfolderBase]: 45943/59988 cut-off events. [2024-11-10 10:32:10,586 INFO L125 PetriNetUnfolderBase]: For 5744/5744 co-relation queries the response was YES. [2024-11-10 10:32:10,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128601 conditions, 59988 events. 45943/59988 cut-off events. For 5744/5744 co-relation queries the response was YES. Maximal size of possible extension queue 1579. Compared 332500 event pairs, 17207 based on Foata normal form. 1090/53104 useless extension candidates. Maximal degree in co-relation 128596. Up to 37346 conditions per place. [2024-11-10 10:32:10,870 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 85 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-11-10 10:32:10,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 419 flow [2024-11-10 10:32:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:32:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:32:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-10 10:32:10,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-11-10 10:32:10,873 INFO L175 Difference]: Start difference. First operand has 64 places, 67 transitions, 167 flow. Second operand 3 states and 136 transitions. [2024-11-10 10:32:10,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 419 flow [2024-11-10 10:32:10,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 415 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:10,877 INFO L231 Difference]: Finished difference. Result has 66 places, 67 transitions, 170 flow [2024-11-10 10:32:10,877 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=66, PETRI_TRANSITIONS=67} [2024-11-10 10:32:10,878 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-10 10:32:10,878 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 67 transitions, 170 flow [2024-11-10 10:32:10,878 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:10,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:10,879 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:10,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 10:32:10,879 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:32:10,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:10,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1272094248, now seen corresponding path program 1 times [2024-11-10 10:32:10,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:10,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660444604] [2024-11-10 10:32:10,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:10,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:11,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:11,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660444604] [2024-11-10 10:32:11,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660444604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:11,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:11,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:32:11,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314552346] [2024-11-10 10:32:11,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:11,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:32:11,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:11,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:32:11,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:32:11,040 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 76 [2024-11-10 10:32:11,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 67 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:11,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:11,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 76 [2024-11-10 10:32:11,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:14,740 INFO L124 PetriNetUnfolderBase]: 42329/55483 cut-off events. [2024-11-10 10:32:14,741 INFO L125 PetriNetUnfolderBase]: For 7460/7460 co-relation queries the response was YES. [2024-11-10 10:32:14,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 120180 conditions, 55483 events. 42329/55483 cut-off events. For 7460/7460 co-relation queries the response was YES. Maximal size of possible extension queue 1375. Compared 305104 event pairs, 14810 based on Foata normal form. 914/48911 useless extension candidates. Maximal degree in co-relation 120174. Up to 37352 conditions per place. [2024-11-10 10:32:14,978 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 85 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-11-10 10:32:14,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 100 transitions, 425 flow [2024-11-10 10:32:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:32:14,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:32:14,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 137 transitions. [2024-11-10 10:32:14,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6008771929824561 [2024-11-10 10:32:14,980 INFO L175 Difference]: Start difference. First operand has 66 places, 67 transitions, 170 flow. Second operand 3 states and 137 transitions. [2024-11-10 10:32:14,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 100 transitions, 425 flow [2024-11-10 10:32:14,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 100 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:14,990 INFO L231 Difference]: Finished difference. Result has 68 places, 67 transitions, 176 flow [2024-11-10 10:32:14,991 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=68, PETRI_TRANSITIONS=67} [2024-11-10 10:32:14,991 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 0 predicate places. [2024-11-10 10:32:14,991 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 67 transitions, 176 flow [2024-11-10 10:32:14,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:14,992 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:14,992 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:14,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 10:32:14,993 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:32:14,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:14,993 INFO L85 PathProgramCache]: Analyzing trace with hash -598259962, now seen corresponding path program 1 times [2024-11-10 10:32:14,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:14,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463187583] [2024-11-10 10:32:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:14,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:15,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:15,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463187583] [2024-11-10 10:32:15,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463187583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:15,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:15,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:32:15,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570558378] [2024-11-10 10:32:15,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:15,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:32:15,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:15,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:32:15,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:32:15,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 76 [2024-11-10 10:32:15,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 67 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:15,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:15,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 76 [2024-11-10 10:32:15,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:18,973 INFO L124 PetriNetUnfolderBase]: 43382/56863 cut-off events. [2024-11-10 10:32:18,973 INFO L125 PetriNetUnfolderBase]: For 10081/10081 co-relation queries the response was YES. [2024-11-10 10:32:19,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125839 conditions, 56863 events. 43382/56863 cut-off events. For 10081/10081 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 306605 event pairs, 14565 based on Foata normal form. 695/50431 useless extension candidates. Maximal degree in co-relation 125832. Up to 37488 conditions per place. [2024-11-10 10:32:19,328 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 80 selfloop transitions, 2 changer transitions 6/101 dead transitions. [2024-11-10 10:32:19,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 101 transitions, 433 flow [2024-11-10 10:32:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:32:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:32:19,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2024-11-10 10:32:19,330 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6140350877192983 [2024-11-10 10:32:19,330 INFO L175 Difference]: Start difference. First operand has 68 places, 67 transitions, 176 flow. Second operand 3 states and 140 transitions. [2024-11-10 10:32:19,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 101 transitions, 433 flow [2024-11-10 10:32:19,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 101 transitions, 431 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:19,340 INFO L231 Difference]: Finished difference. Result has 70 places, 67 transitions, 182 flow [2024-11-10 10:32:19,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=70, PETRI_TRANSITIONS=67} [2024-11-10 10:32:19,341 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 2 predicate places. [2024-11-10 10:32:19,341 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 67 transitions, 182 flow [2024-11-10 10:32:19,342 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:19,342 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:19,342 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:19,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-10 10:32:19,343 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:32:19,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:19,343 INFO L85 PathProgramCache]: Analyzing trace with hash -417796364, now seen corresponding path program 1 times [2024-11-10 10:32:19,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:19,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420555868] [2024-11-10 10:32:19,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:19,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:19,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:19,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420555868] [2024-11-10 10:32:19,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420555868] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:19,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:19,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 10:32:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402772661] [2024-11-10 10:32:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:19,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 10:32:19,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 10:32:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 10:32:19,624 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 76 [2024-11-10 10:32:19,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 67 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:19,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:19,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 76 [2024-11-10 10:32:19,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:22,045 INFO L124 PetriNetUnfolderBase]: 27815/36527 cut-off events. [2024-11-10 10:32:22,045 INFO L125 PetriNetUnfolderBase]: For 9054/9054 co-relation queries the response was YES. [2024-11-10 10:32:22,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81671 conditions, 36527 events. 27815/36527 cut-off events. For 9054/9054 co-relation queries the response was YES. Maximal size of possible extension queue 960. Compared 182430 event pairs, 12783 based on Foata normal form. 312/31785 useless extension candidates. Maximal degree in co-relation 81663. Up to 30323 conditions per place. [2024-11-10 10:32:22,217 INFO L140 encePairwiseOnDemand]: 73/76 looper letters, 66 selfloop transitions, 2 changer transitions 8/89 dead transitions. [2024-11-10 10:32:22,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 89 transitions, 382 flow [2024-11-10 10:32:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 10:32:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 10:32:22,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-11-10 10:32:22,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-10 10:32:22,218 INFO L175 Difference]: Start difference. First operand has 70 places, 67 transitions, 182 flow. Second operand 3 states and 124 transitions. [2024-11-10 10:32:22,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 89 transitions, 382 flow [2024-11-10 10:32:22,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 89 transitions, 380 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:22,222 INFO L231 Difference]: Finished difference. Result has 72 places, 68 transitions, 192 flow [2024-11-10 10:32:22,222 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=72, PETRI_TRANSITIONS=68} [2024-11-10 10:32:22,223 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 4 predicate places. [2024-11-10 10:32:22,223 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 68 transitions, 192 flow [2024-11-10 10:32:22,223 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 10:32:22,223 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:22,223 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:22,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-10 10:32:22,224 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:32:22,224 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:22,225 INFO L85 PathProgramCache]: Analyzing trace with hash 2095040892, now seen corresponding path program 1 times [2024-11-10 10:32:22,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:22,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466730005] [2024-11-10 10:32:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:22,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:22,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 10:32:22,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:22,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466730005] [2024-11-10 10:32:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466730005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:22,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:22,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 10:32:22,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206187150] [2024-11-10 10:32:22,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:22,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:32:22,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:22,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:32:22,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:32:22,529 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 76 [2024-11-10 10:32:22,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 68 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2024-11-10 10:32:22,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:22,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 76 [2024-11-10 10:32:22,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 10:32:25,522 INFO L124 PetriNetUnfolderBase]: 32229/42742 cut-off events. [2024-11-10 10:32:25,522 INFO L125 PetriNetUnfolderBase]: For 8865/8865 co-relation queries the response was YES. [2024-11-10 10:32:25,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95744 conditions, 42742 events. 32229/42742 cut-off events. For 8865/8865 co-relation queries the response was YES. Maximal size of possible extension queue 928. Compared 222239 event pairs, 28730 based on Foata normal form. 281/36700 useless extension candidates. Maximal degree in co-relation 95735. Up to 36460 conditions per place. [2024-11-10 10:32:25,726 INFO L140 encePairwiseOnDemand]: 66/76 looper letters, 58 selfloop transitions, 2 changer transitions 48/117 dead transitions. [2024-11-10 10:32:25,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 514 flow [2024-11-10 10:32:25,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 10:32:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 10:32:25,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 169 transitions. [2024-11-10 10:32:25,728 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44473684210526315 [2024-11-10 10:32:25,728 INFO L175 Difference]: Start difference. First operand has 72 places, 68 transitions, 192 flow. Second operand 5 states and 169 transitions. [2024-11-10 10:32:25,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 514 flow [2024-11-10 10:32:25,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 512 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-10 10:32:25,731 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 216 flow [2024-11-10 10:32:25,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=76, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2024-11-10 10:32:25,732 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-11-10 10:32:25,732 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 216 flow [2024-11-10 10:32:25,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 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) [2024-11-10 10:32:25,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 10:32:25,732 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 10:32:25,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-10 10:32:25,732 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2024-11-10 10:32:25,733 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 10:32:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1325677646, now seen corresponding path program 1 times [2024-11-10 10:32:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 10:32:25,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723915381] [2024-11-10 10:32:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 10:32:25,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 10:32:25,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 10:32:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 10:32:25,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 10:32:25,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723915381] [2024-11-10 10:32:25,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723915381] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 10:32:25,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 10:32:25,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 10:32:25,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355074860] [2024-11-10 10:32:25,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 10:32:25,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 10:32:25,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 10:32:25,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 10:32:25,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 10:32:25,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 76 [2024-11-10 10:32:25,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 216 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 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) [2024-11-10 10:32:25,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 10:32:25,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 76 [2024-11-10 10:32:25,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand