./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a340643f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-channel-sum.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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a340643-m [2024-01-27 15:35:50,575 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-27 15:35:50,651 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-27 15:35:50,662 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-27 15:35:50,663 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-27 15:35:50,692 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-27 15:35:50,693 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-27 15:35:50,694 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-27 15:35:50,695 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-27 15:35:50,696 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-27 15:35:50,697 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-27 15:35:50,697 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-27 15:35:50,698 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-27 15:35:50,701 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-27 15:35:50,702 INFO L153 SettingsManager]: * Use SBE=true [2024-01-27 15:35:50,702 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-27 15:35:50,702 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-27 15:35:50,703 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-27 15:35:50,703 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-27 15:35:50,703 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-27 15:35:50,704 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-27 15:35:50,704 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-27 15:35:50,704 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-27 15:35:50,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-27 15:35:50,705 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-27 15:35:50,705 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-27 15:35:50,705 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-27 15:35:50,705 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-27 15:35:50,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-27 15:35:50,706 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-27 15:35:50,707 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-27 15:35:50,707 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-27 15:35:50,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:35:50,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-27 15:35:50,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-27 15:35:50,708 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-27 15:35:50,708 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-27 15:35:50,709 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-27 15:35:50,709 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-27 15:35:50,709 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-27 15:35:50,709 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-27 15:35:50,709 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-27 15:35:50,709 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-27 15:35:50,710 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2024-01-27 15:35:50,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-27 15:35:51,000 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-27 15:35:51,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-27 15:35:51,006 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-27 15:35:51,006 INFO L274 PluginConnector]: CDTParser initialized [2024-01-27 15:35:51,007 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2024-01-27 15:35:52,034 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-27 15:35:52,231 INFO L384 CDTParser]: Found 1 translation units. [2024-01-27 15:35:52,232 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c [2024-01-27 15:35:52,242 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37aaf57be/bd9ff6da81ad42c88c3b8b8e96085fec/FLAG9e27f1333 [2024-01-27 15:35:52,259 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/37aaf57be/bd9ff6da81ad42c88c3b8b8e96085fec [2024-01-27 15:35:52,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-27 15:35:52,262 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-01-27 15:35:52,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-27 15:35:52,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-27 15:35:52,267 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-27 15:35:52,268 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,269 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bdc29ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52, skipping insertion in model container [2024-01-27 15:35:52,269 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,300 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-01-27 15:35:52,428 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2973,2986] [2024-01-27 15:35:52,435 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:35:52,442 INFO L202 MainTranslator]: Completed pre-run [2024-01-27 15:35:52,492 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-channel-sum.wvr.c[2973,2986] [2024-01-27 15:35:52,494 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-27 15:35:52,508 INFO L206 MainTranslator]: Completed translation [2024-01-27 15:35:52,508 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52 WrapperNode [2024-01-27 15:35:52,509 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-27 15:35:52,510 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-27 15:35:52,510 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-27 15:35:52,510 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-27 15:35:52,516 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,542 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,566 INFO L138 Inliner]: procedures = 24, calls = 45, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 157 [2024-01-27 15:35:52,566 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-27 15:35:52,567 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-27 15:35:52,567 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-27 15:35:52,567 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-27 15:35:52,586 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,587 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,600 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,612 INFO L175 MemorySlicer]: Split 10 memory accesses to 4 slices as follows [2, 2, 4, 2]. 40 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 3 writes are split as follows [0, 1, 1, 1]. [2024-01-27 15:35:52,612 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,613 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,620 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,627 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,628 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,632 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-27 15:35:52,634 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-27 15:35:52,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-27 15:35:52,641 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-27 15:35:52,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (1/1) ... [2024-01-27 15:35:52,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-27 15:35:52,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:52,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-01-27 15:35:52,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-01-27 15:35:52,737 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-27 15:35:52,737 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-01-27 15:35:52,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-01-27 15:35:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-01-27 15:35:52,738 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-01-27 15:35:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-27 15:35:52,738 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-27 15:35:52,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-27 15:35:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-27 15:35:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-27 15:35:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-27 15:35:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-27 15:35:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-27 15:35:52,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-27 15:35:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-01-27 15:35:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-01-27 15:35:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-01-27 15:35:52,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-27 15:35:52,741 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-27 15:35:52,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-27 15:35:52,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-27 15:35:52,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-27 15:35:52,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-27 15:35:52,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-27 15:35:52,745 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-27 15:35:52,859 INFO L244 CfgBuilder]: Building ICFG [2024-01-27 15:35:52,861 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-27 15:35:53,110 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-27 15:35:53,112 INFO L293 CfgBuilder]: Performing block encoding [2024-01-27 15:35:53,311 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-27 15:35:53,314 INFO L320 CfgBuilder]: Removed 3 assume(true) statements. [2024-01-27 15:35:53,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:35:53 BoogieIcfgContainer [2024-01-27 15:35:53,315 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-27 15:35:53,317 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-27 15:35:53,317 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-27 15:35:53,320 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-27 15:35:53,320 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.01 03:35:52" (1/3) ... [2024-01-27 15:35:53,321 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369cb710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:35:53, skipping insertion in model container [2024-01-27 15:35:53,322 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.01 03:35:52" (2/3) ... [2024-01-27 15:35:53,323 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@369cb710 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.01 03:35:53, skipping insertion in model container [2024-01-27 15:35:53,323 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.01 03:35:53" (3/3) ... [2024-01-27 15:35:53,324 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-01-27 15:35:53,332 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-01-27 15:35:53,340 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-27 15:35:53,341 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-01-27 15:35:53,341 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-27 15:35:53,399 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-27 15:35:53,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 36 places, 34 transitions, 82 flow [2024-01-27 15:35:53,475 INFO L124 PetriNetUnfolderBase]: 5/32 cut-off events. [2024-01-27 15:35:53,476 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:35:53,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 32 events. 5/32 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 39 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2024-01-27 15:35:53,481 INFO L82 GeneralOperation]: Start removeDead. Operand has 36 places, 34 transitions, 82 flow [2024-01-27 15:35:53,485 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 33 places, 31 transitions, 74 flow [2024-01-27 15:35:53,501 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-27 15:35:53,508 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@50c38466, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-27 15:35:53,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-01-27 15:35:53,527 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-27 15:35:53,528 INFO L124 PetriNetUnfolderBase]: 5/30 cut-off events. [2024-01-27 15:35:53,528 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-27 15:35:53,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:53,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:53,529 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:53,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:53,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1658882849, now seen corresponding path program 1 times [2024-01-27 15:35:53,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:53,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720551097] [2024-01-27 15:35:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:53,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:53,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:53,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720551097] [2024-01-27 15:35:53,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720551097] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:53,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:53,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:35:53,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392407272] [2024-01-27 15:35:53,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:53,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-01-27 15:35:53,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:53,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-01-27 15:35:53,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-01-27 15:35:53,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:35:53,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 74 flow. Second operand has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:53,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:53,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:35:53,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:53,940 INFO L124 PetriNetUnfolderBase]: 96/199 cut-off events. [2024-01-27 15:35:53,941 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-01-27 15:35:53,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 390 conditions, 199 events. 96/199 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 852 event pairs, 78 based on Foata normal form. 8/169 useless extension candidates. Maximal degree in co-relation 287. Up to 170 conditions per place. [2024-01-27 15:35:53,946 INFO L140 encePairwiseOnDemand]: 33/34 looper letters, 22 selfloop transitions, 0 changer transitions 0/30 dead transitions. [2024-01-27 15:35:53,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 116 flow [2024-01-27 15:35:53,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-01-27 15:35:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-01-27 15:35:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 43 transitions. [2024-01-27 15:35:53,959 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6323529411764706 [2024-01-27 15:35:53,961 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 74 flow. Second operand 2 states and 43 transitions. [2024-01-27 15:35:53,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 116 flow [2024-01-27 15:35:53,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 30 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-01-27 15:35:53,966 INFO L231 Difference]: Finished difference. Result has 30 places, 30 transitions, 64 flow [2024-01-27 15:35:53,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=64, PETRI_PLACES=30, PETRI_TRANSITIONS=30} [2024-01-27 15:35:53,971 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, -3 predicate places. [2024-01-27 15:35:53,972 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 30 transitions, 64 flow [2024-01-27 15:35:53,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 17.0) internal successors, (34), 2 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:53,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:53,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:53,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-01-27 15:35:53,973 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:53,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:53,974 INFO L85 PathProgramCache]: Analyzing trace with hash 2052383742, now seen corresponding path program 1 times [2024-01-27 15:35:53,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:53,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362079131] [2024-01-27 15:35:53,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:53,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:54,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:54,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:54,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:54,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362079131] [2024-01-27 15:35:54,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362079131] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:54,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:54,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-27 15:35:54,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428367989] [2024-01-27 15:35:54,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:54,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:35:54,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:54,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:35:54,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:35:54,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:35:54,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 30 transitions, 64 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) [2024-01-27 15:35:54,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:54,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:35:54,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:54,189 INFO L124 PetriNetUnfolderBase]: 160/316 cut-off events. [2024-01-27 15:35:54,190 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-01-27 15:35:54,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 316 events. 160/316 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1399 event pairs, 51 based on Foata normal form. 1/257 useless extension candidates. Maximal degree in co-relation 596. Up to 157 conditions per place. [2024-01-27 15:35:54,194 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 34 selfloop transitions, 2 changer transitions 3/47 dead transitions. [2024-01-27 15:35:54,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 47 transitions, 179 flow [2024-01-27 15:35:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:35:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:35:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-01-27 15:35:54,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6862745098039216 [2024-01-27 15:35:54,197 INFO L175 Difference]: Start difference. First operand has 30 places, 30 transitions, 64 flow. Second operand 3 states and 70 transitions. [2024-01-27 15:35:54,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 47 transitions, 179 flow [2024-01-27 15:35:54,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 179 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:35:54,199 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 76 flow [2024-01-27 15:35:54,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-01-27 15:35:54,199 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 0 predicate places. [2024-01-27 15:35:54,199 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 76 flow [2024-01-27 15:35:54,200 INFO L496 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) [2024-01-27 15:35:54,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:54,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:54,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-27 15:35:54,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:54,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash -870829824, now seen corresponding path program 1 times [2024-01-27 15:35:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:54,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022765739] [2024-01-27 15:35:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:54,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:54,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022765739] [2024-01-27 15:35:54,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022765739] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:54,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:54,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:35:54,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477584083] [2024-01-27 15:35:54,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:54,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:35:54,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:54,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:35:54,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:35:54,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:35:54,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:54,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:54,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:35:54,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:54,505 INFO L124 PetriNetUnfolderBase]: 193/385 cut-off events. [2024-01-27 15:35:54,505 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-01-27 15:35:54,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 385 events. 193/385 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1894 event pairs, 148 based on Foata normal form. 17/365 useless extension candidates. Maximal degree in co-relation 794. Up to 276 conditions per place. [2024-01-27 15:35:54,507 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 22 selfloop transitions, 2 changer transitions 13/45 dead transitions. [2024-01-27 15:35:54,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 45 transitions, 182 flow [2024-01-27 15:35:54,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:35:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:35:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 78 transitions. [2024-01-27 15:35:54,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5735294117647058 [2024-01-27 15:35:54,521 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 76 flow. Second operand 4 states and 78 transitions. [2024-01-27 15:35:54,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 45 transitions, 182 flow [2024-01-27 15:35:54,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 45 transitions, 180 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:35:54,523 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 90 flow [2024-01-27 15:35:54,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=90, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2024-01-27 15:35:54,523 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 4 predicate places. [2024-01-27 15:35:54,524 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 90 flow [2024-01-27 15:35:54,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:54,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:54,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:35:54,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-27 15:35:54,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:54,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:54,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1787168473, now seen corresponding path program 1 times [2024-01-27 15:35:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:54,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417243281] [2024-01-27 15:35:54,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:54,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:54,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:54,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:54,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417243281] [2024-01-27 15:35:54,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417243281] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:54,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:54,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:35:54,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953388157] [2024-01-27 15:35:54,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:54,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:35:54,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:54,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:35:54,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:35:54,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-27 15:35:54,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:54,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:54,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-27 15:35:54,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:54,793 INFO L124 PetriNetUnfolderBase]: 256/497 cut-off events. [2024-01-27 15:35:54,793 INFO L125 PetriNetUnfolderBase]: For 87/87 co-relation queries the response was YES. [2024-01-27 15:35:54,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1026 conditions, 497 events. 256/497 cut-off events. For 87/87 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2060 event pairs, 55 based on Foata normal form. 18/472 useless extension candidates. Maximal degree in co-relation 1019. Up to 302 conditions per place. [2024-01-27 15:35:54,796 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 38 selfloop transitions, 6 changer transitions 8/58 dead transitions. [2024-01-27 15:35:54,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 58 transitions, 253 flow [2024-01-27 15:35:54,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:35:54,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:35:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2024-01-27 15:35:54,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6102941176470589 [2024-01-27 15:35:54,798 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 90 flow. Second operand 4 states and 83 transitions. [2024-01-27 15:35:54,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 58 transitions, 253 flow [2024-01-27 15:35:54,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 58 transitions, 249 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-27 15:35:54,800 INFO L231 Difference]: Finished difference. Result has 40 places, 37 transitions, 123 flow [2024-01-27 15:35:54,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=40, PETRI_TRANSITIONS=37} [2024-01-27 15:35:54,801 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 7 predicate places. [2024-01-27 15:35:54,801 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 37 transitions, 123 flow [2024-01-27 15:35:54,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:54,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:54,801 INFO L208 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] [2024-01-27 15:35:54,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-27 15:35:54,802 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:54,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:54,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1953381751, now seen corresponding path program 1 times [2024-01-27 15:35:54,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:54,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505236572] [2024-01-27 15:35:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:54,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:54,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:35:55,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:55,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505236572] [2024-01-27 15:35:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505236572] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262882726] [2024-01-27 15:35:55,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:55,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:55,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:55,021 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:55,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-27 15:35:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:55,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2024-01-27 15:35:55,109 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:55,182 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-27 15:35:55,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:55,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:55,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2024-01-27 15:35:55,671 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:55,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 68 [2024-01-27 15:35:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:55,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262882726] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:55,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:55,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2024-01-27 15:35:55,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767653537] [2024-01-27 15:35:55,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:55,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-27 15:35:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:55,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-27 15:35:55,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-01-27 15:35:55,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-27 15:35:55,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 123 flow. Second operand has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:55,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:55,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-27 15:35:55,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:57,159 INFO L124 PetriNetUnfolderBase]: 1276/2548 cut-off events. [2024-01-27 15:35:57,160 INFO L125 PetriNetUnfolderBase]: For 1152/1152 co-relation queries the response was YES. [2024-01-27 15:35:57,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5732 conditions, 2548 events. 1276/2548 cut-off events. For 1152/1152 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 16562 event pairs, 150 based on Foata normal form. 72/2385 useless extension candidates. Maximal degree in co-relation 5723. Up to 337 conditions per place. [2024-01-27 15:35:57,167 INFO L140 encePairwiseOnDemand]: 23/34 looper letters, 118 selfloop transitions, 46 changer transitions 212/382 dead transitions. [2024-01-27 15:35:57,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 382 transitions, 1840 flow [2024-01-27 15:35:57,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-01-27 15:35:57,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2024-01-27 15:35:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 720 transitions. [2024-01-27 15:35:57,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5042016806722689 [2024-01-27 15:35:57,170 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 123 flow. Second operand 42 states and 720 transitions. [2024-01-27 15:35:57,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 382 transitions, 1840 flow [2024-01-27 15:35:57,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 382 transitions, 1840 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-01-27 15:35:57,175 INFO L231 Difference]: Finished difference. Result has 111 places, 75 transitions, 530 flow [2024-01-27 15:35:57,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=530, PETRI_PLACES=111, PETRI_TRANSITIONS=75} [2024-01-27 15:35:57,176 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 78 predicate places. [2024-01-27 15:35:57,176 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 75 transitions, 530 flow [2024-01-27 15:35:57,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 11.882352941176471) internal successors, (202), 17 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:57,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:57,177 INFO L208 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] [2024-01-27 15:35:57,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:57,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:57,393 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:57,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:57,394 INFO L85 PathProgramCache]: Analyzing trace with hash -419275172, now seen corresponding path program 1 times [2024-01-27 15:35:57,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:57,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196080139] [2024-01-27 15:35:57,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:57,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:57,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-01-27 15:35:57,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:57,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196080139] [2024-01-27 15:35:57,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196080139] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:35:57,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:35:57,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-27 15:35:57,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97427011] [2024-01-27 15:35:57,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:35:57,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-27 15:35:57,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:57,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-27 15:35:57,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-27 15:35:57,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-27 15:35:57,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 75 transitions, 530 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:57,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:57,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-27 15:35:57,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:57,564 INFO L124 PetriNetUnfolderBase]: 642/1270 cut-off events. [2024-01-27 15:35:57,564 INFO L125 PetriNetUnfolderBase]: For 6503/6503 co-relation queries the response was YES. [2024-01-27 15:35:57,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4529 conditions, 1270 events. 642/1270 cut-off events. For 6503/6503 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 7481 event pairs, 130 based on Foata normal form. 8/1227 useless extension candidates. Maximal degree in co-relation 4490. Up to 1023 conditions per place. [2024-01-27 15:35:57,573 INFO L140 encePairwiseOnDemand]: 31/34 looper letters, 70 selfloop transitions, 2 changer transitions 2/80 dead transitions. [2024-01-27 15:35:57,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 80 transitions, 692 flow [2024-01-27 15:35:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-27 15:35:57,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-27 15:35:57,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 61 transitions. [2024-01-27 15:35:57,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980392156862745 [2024-01-27 15:35:57,574 INFO L175 Difference]: Start difference. First operand has 111 places, 75 transitions, 530 flow. Second operand 3 states and 61 transitions. [2024-01-27 15:35:57,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 80 transitions, 692 flow [2024-01-27 15:35:57,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 558 flow, removed 62 selfloop flow, removed 21 redundant places. [2024-01-27 15:35:57,590 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 338 flow [2024-01-27 15:35:57,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=326, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=338, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2024-01-27 15:35:57,591 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 39 predicate places. [2024-01-27 15:35:57,591 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 338 flow [2024-01-27 15:35:57,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:57,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:57,591 INFO L208 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] [2024-01-27 15:35:57,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-01-27 15:35:57,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:57,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1328297943, now seen corresponding path program 2 times [2024-01-27 15:35:57,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:57,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401189745] [2024-01-27 15:35:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:57,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:57,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:57,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:57,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401189745] [2024-01-27 15:35:57,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401189745] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:57,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151390716] [2024-01-27 15:35:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:35:57,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:57,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:57,711 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:57,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-27 15:35:57,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:35:57,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:57,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-27 15:35:57,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:57,871 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:57,871 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:57,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:57,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151390716] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:57,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:57,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-01-27 15:35:57,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978773040] [2024-01-27 15:35:57,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:57,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:35:57,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:57,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:35:57,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:35:58,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:35:58,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 338 flow. Second operand has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:58,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:58,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:35:58,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:58,254 INFO L124 PetriNetUnfolderBase]: 538/1138 cut-off events. [2024-01-27 15:35:58,254 INFO L125 PetriNetUnfolderBase]: For 1922/1922 co-relation queries the response was YES. [2024-01-27 15:35:58,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3232 conditions, 1138 events. 538/1138 cut-off events. For 1922/1922 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6678 event pairs, 257 based on Foata normal form. 18/1077 useless extension candidates. Maximal degree in co-relation 3210. Up to 598 conditions per place. [2024-01-27 15:35:58,258 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 41 selfloop transitions, 3 changer transitions 53/106 dead transitions. [2024-01-27 15:35:58,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 106 transitions, 690 flow [2024-01-27 15:35:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-27 15:35:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-27 15:35:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-01-27 15:35:58,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-01-27 15:35:58,259 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 338 flow. Second operand 9 states and 162 transitions. [2024-01-27 15:35:58,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 106 transitions, 690 flow [2024-01-27 15:35:58,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 106 transitions, 687 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-27 15:35:58,264 INFO L231 Difference]: Finished difference. Result has 83 places, 53 transitions, 278 flow [2024-01-27 15:35:58,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=278, PETRI_PLACES=83, PETRI_TRANSITIONS=53} [2024-01-27 15:35:58,265 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 50 predicate places. [2024-01-27 15:35:58,265 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 53 transitions, 278 flow [2024-01-27 15:35:58,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.0625) internal successors, (209), 16 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:58,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:58,265 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 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] [2024-01-27 15:35:58,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-27 15:35:58,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-01-27 15:35:58,477 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:35:58,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:35:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1789961256, now seen corresponding path program 3 times [2024-01-27 15:35:58,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:35:58,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85548136] [2024-01-27 15:35:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:35:58,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:35:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:35:59,252 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:35:59,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:35:59,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85548136] [2024-01-27 15:35:59,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85548136] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:35:59,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135993303] [2024-01-27 15:35:59,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:35:59,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:35:59,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:35:59,255 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:35:59,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-27 15:35:59,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-27 15:35:59,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:35:59,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:35:59,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:35:59,435 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:35:59,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:35:59,500 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:35:59,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2024-01-27 15:35:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-01-27 15:35:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135993303] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:35:59,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:35:59,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 15 [2024-01-27 15:35:59,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445587629] [2024-01-27 15:35:59,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:35:59,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-01-27 15:35:59,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:35:59,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-01-27 15:35:59,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2024-01-27 15:35:59,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:35:59,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 53 transitions, 278 flow. Second operand has 16 states, 16 states have (on average 13.625) internal successors, (218), 16 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:59,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:35:59,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:35:59,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:35:59,970 INFO L124 PetriNetUnfolderBase]: 470/990 cut-off events. [2024-01-27 15:35:59,971 INFO L125 PetriNetUnfolderBase]: For 2561/2561 co-relation queries the response was YES. [2024-01-27 15:35:59,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3059 conditions, 990 events. 470/990 cut-off events. For 2561/2561 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 5662 event pairs, 116 based on Foata normal form. 1/931 useless extension candidates. Maximal degree in co-relation 3033. Up to 266 conditions per place. [2024-01-27 15:35:59,975 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 73 selfloop transitions, 26 changer transitions 11/119 dead transitions. [2024-01-27 15:35:59,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 119 transitions, 833 flow [2024-01-27 15:35:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-01-27 15:35:59,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-01-27 15:35:59,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 233 transitions. [2024-01-27 15:35:59,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4894957983193277 [2024-01-27 15:35:59,977 INFO L175 Difference]: Start difference. First operand has 83 places, 53 transitions, 278 flow. Second operand 14 states and 233 transitions. [2024-01-27 15:35:59,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 119 transitions, 833 flow [2024-01-27 15:35:59,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 119 transitions, 727 flow, removed 50 selfloop flow, removed 12 redundant places. [2024-01-27 15:35:59,982 INFO L231 Difference]: Finished difference. Result has 76 places, 62 transitions, 389 flow [2024-01-27 15:35:59,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=389, PETRI_PLACES=76, PETRI_TRANSITIONS=62} [2024-01-27 15:35:59,983 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 43 predicate places. [2024-01-27 15:35:59,983 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 62 transitions, 389 flow [2024-01-27 15:35:59,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.625) internal successors, (218), 16 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:35:59,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:35:59,984 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 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] [2024-01-27 15:35:59,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:00,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:00,195 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:00,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:00,196 INFO L85 PathProgramCache]: Analyzing trace with hash -572103158, now seen corresponding path program 4 times [2024-01-27 15:36:00,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:00,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608648663] [2024-01-27 15:36:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:00,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:00,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:00,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608648663] [2024-01-27 15:36:00,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608648663] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:00,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374280310] [2024-01-27 15:36:00,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:36:00,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:00,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:00,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:00,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-27 15:36:00,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:36:00,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:00,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 10 conjunts are in the unsatisfiable core [2024-01-27 15:36:00,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:00,397 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:00,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:00,450 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-01-27 15:36:00,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374280310] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:00,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:00,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 6] total 8 [2024-01-27 15:36:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404034782] [2024-01-27 15:36:00,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:00,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:36:00,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:36:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:36:00,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-27 15:36:00,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 62 transitions, 389 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:00,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:00,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-27 15:36:00,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:00,839 INFO L124 PetriNetUnfolderBase]: 1400/2784 cut-off events. [2024-01-27 15:36:00,839 INFO L125 PetriNetUnfolderBase]: For 5689/5701 co-relation queries the response was YES. [2024-01-27 15:36:00,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8221 conditions, 2784 events. 1400/2784 cut-off events. For 5689/5701 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 16496 event pairs, 59 based on Foata normal form. 312/2949 useless extension candidates. Maximal degree in co-relation 8200. Up to 423 conditions per place. [2024-01-27 15:36:00,853 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 148 selfloop transitions, 53 changer transitions 12/220 dead transitions. [2024-01-27 15:36:00,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 220 transitions, 1649 flow [2024-01-27 15:36:00,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:36:00,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:36:00,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 251 transitions. [2024-01-27 15:36:00,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5678733031674208 [2024-01-27 15:36:00,855 INFO L175 Difference]: Start difference. First operand has 76 places, 62 transitions, 389 flow. Second operand 13 states and 251 transitions. [2024-01-27 15:36:00,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 220 transitions, 1649 flow [2024-01-27 15:36:00,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 220 transitions, 1580 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-01-27 15:36:00,867 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 841 flow [2024-01-27 15:36:00,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=841, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-01-27 15:36:00,868 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 58 predicate places. [2024-01-27 15:36:00,868 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 841 flow [2024-01-27 15:36:00,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:00,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:00,869 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:00,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-01-27 15:36:01,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:01,081 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:01,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:01,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1552872440, now seen corresponding path program 5 times [2024-01-27 15:36:01,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:01,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567441344] [2024-01-27 15:36:01,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:01,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:01,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-01-27 15:36:01,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:01,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567441344] [2024-01-27 15:36:01,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567441344] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-27 15:36:01,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-27 15:36:01,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-27 15:36:01,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695379939] [2024-01-27 15:36:01,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-27 15:36:01,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-27 15:36:01,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:01,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-27 15:36:01,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-01-27 15:36:01,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 34 [2024-01-27 15:36:01,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 841 flow. Second operand has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:01,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:01,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 34 [2024-01-27 15:36:01,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:01,515 INFO L124 PetriNetUnfolderBase]: 1742/3534 cut-off events. [2024-01-27 15:36:01,515 INFO L125 PetriNetUnfolderBase]: For 12612/12864 co-relation queries the response was YES. [2024-01-27 15:36:01,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13030 conditions, 3534 events. 1742/3534 cut-off events. For 12612/12864 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 21407 event pairs, 382 based on Foata normal form. 284/3618 useless extension candidates. Maximal degree in co-relation 13002. Up to 1664 conditions per place. [2024-01-27 15:36:01,533 INFO L140 encePairwiseOnDemand]: 30/34 looper letters, 112 selfloop transitions, 4 changer transitions 0/124 dead transitions. [2024-01-27 15:36:01,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 124 transitions, 1287 flow [2024-01-27 15:36:01,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-01-27 15:36:01,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-01-27 15:36:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2024-01-27 15:36:01,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-01-27 15:36:01,534 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 841 flow. Second operand 4 states and 68 transitions. [2024-01-27 15:36:01,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 124 transitions, 1287 flow [2024-01-27 15:36:01,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 124 transitions, 1230 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-01-27 15:36:01,552 INFO L231 Difference]: Finished difference. Result has 93 places, 97 transitions, 788 flow [2024-01-27 15:36:01,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=788, PETRI_PLACES=93, PETRI_TRANSITIONS=97} [2024-01-27 15:36:01,552 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 60 predicate places. [2024-01-27 15:36:01,552 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 97 transitions, 788 flow [2024-01-27 15:36:01,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.0) internal successors, (56), 4 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:01,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:01,553 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 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] [2024-01-27 15:36:01,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-01-27 15:36:01,553 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:01,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:01,554 INFO L85 PathProgramCache]: Analyzing trace with hash 211475535, now seen corresponding path program 1 times [2024-01-27 15:36:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769661407] [2024-01-27 15:36:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:02,077 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:02,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:02,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769661407] [2024-01-27 15:36:02,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769661407] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:02,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654996577] [2024-01-27 15:36:02,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:02,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:02,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:02,079 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:02,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-27 15:36:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:02,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 35 conjunts are in the unsatisfiable core [2024-01-27 15:36:02,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:02,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:02,773 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:02,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-01-27 15:36:02,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:02,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654996577] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:02,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:02,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2024-01-27 15:36:02,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529130508] [2024-01-27 15:36:02,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:02,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-01-27 15:36:02,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:02,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-01-27 15:36:02,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2024-01-27 15:36:03,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:03,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 97 transitions, 788 flow. Second operand has 34 states, 34 states have (on average 12.088235294117647) internal successors, (411), 34 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:03,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:03,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:03,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:05,525 INFO L124 PetriNetUnfolderBase]: 3822/8536 cut-off events. [2024-01-27 15:36:05,526 INFO L125 PetriNetUnfolderBase]: For 25291/25877 co-relation queries the response was YES. [2024-01-27 15:36:05,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30459 conditions, 8536 events. 3822/8536 cut-off events. For 25291/25877 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 66978 event pairs, 689 based on Foata normal form. 258/8228 useless extension candidates. Maximal degree in co-relation 30430. Up to 1537 conditions per place. [2024-01-27 15:36:05,579 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 258 selfloop transitions, 177 changer transitions 135/583 dead transitions. [2024-01-27 15:36:05,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 583 transitions, 4937 flow [2024-01-27 15:36:05,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-27 15:36:05,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-27 15:36:05,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 930 transitions. [2024-01-27 15:36:05,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470588235294118 [2024-01-27 15:36:05,583 INFO L175 Difference]: Start difference. First operand has 93 places, 97 transitions, 788 flow. Second operand 50 states and 930 transitions. [2024-01-27 15:36:05,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 583 transitions, 4937 flow [2024-01-27 15:36:05,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 583 transitions, 4931 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-01-27 15:36:05,642 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3100 flow [2024-01-27 15:36:05,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=3100, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-01-27 15:36:05,644 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 143 predicate places. [2024-01-27 15:36:05,644 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3100 flow [2024-01-27 15:36:05,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 12.088235294117647) internal successors, (411), 34 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:05,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:05,644 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 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] [2024-01-27 15:36:05,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-01-27 15:36:05,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-01-27 15:36:05,856 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:05,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2012747589, now seen corresponding path program 2 times [2024-01-27 15:36:05,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:05,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831358809] [2024-01-27 15:36:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:05,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:05,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:06,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:06,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831358809] [2024-01-27 15:36:06,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831358809] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:06,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755933650] [2024-01-27 15:36:06,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:36:06,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:06,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:06,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:06,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-27 15:36:06,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:36:06,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:06,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 30 conjunts are in the unsatisfiable core [2024-01-27 15:36:06,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:07,192 INFO L349 Elim1Store]: treesize reduction 16, result has 15.8 percent of original size [2024-01-27 15:36:07,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 17 [2024-01-27 15:36:07,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:07,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:07,551 INFO L349 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2024-01-27 15:36:07,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 60 [2024-01-27 15:36:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:08,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755933650] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:08,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:08,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 32 [2024-01-27 15:36:08,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867791900] [2024-01-27 15:36:08,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:08,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-01-27 15:36:08,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:08,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-01-27 15:36:08,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=862, Unknown=0, NotChecked=0, Total=1056 [2024-01-27 15:36:08,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:08,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3100 flow. Second operand has 33 states, 33 states have (on average 12.212121212121213) internal successors, (403), 33 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:08,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:08,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:08,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:12,923 INFO L124 PetriNetUnfolderBase]: 7751/17042 cut-off events. [2024-01-27 15:36:12,924 INFO L125 PetriNetUnfolderBase]: For 181290/182790 co-relation queries the response was YES. [2024-01-27 15:36:13,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80404 conditions, 17042 events. 7751/17042 cut-off events. For 181290/182790 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 147928 event pairs, 1301 based on Foata normal form. 690/16647 useless extension candidates. Maximal degree in co-relation 80340. Up to 5594 conditions per place. [2024-01-27 15:36:13,049 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 335 selfloop transitions, 373 changer transitions 79/800 dead transitions. [2024-01-27 15:36:13,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 800 transitions, 10493 flow [2024-01-27 15:36:13,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-01-27 15:36:13,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-01-27 15:36:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 676 transitions. [2024-01-27 15:36:13,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5373608903020668 [2024-01-27 15:36:13,051 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3100 flow. Second operand 37 states and 676 transitions. [2024-01-27 15:36:13,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 800 transitions, 10493 flow [2024-01-27 15:36:13,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 800 transitions, 9349 flow, removed 540 selfloop flow, removed 10 redundant places. [2024-01-27 15:36:13,515 INFO L231 Difference]: Finished difference. Result has 221 places, 535 transitions, 7596 flow [2024-01-27 15:36:13,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2672, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=7596, PETRI_PLACES=221, PETRI_TRANSITIONS=535} [2024-01-27 15:36:13,516 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 188 predicate places. [2024-01-27 15:36:13,517 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 535 transitions, 7596 flow [2024-01-27 15:36:13,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 12.212121212121213) internal successors, (403), 33 states have internal predecessors, (403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:13,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:13,517 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 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] [2024-01-27 15:36:13,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:13,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:13,729 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:13,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:13,729 INFO L85 PathProgramCache]: Analyzing trace with hash -61107629, now seen corresponding path program 3 times [2024-01-27 15:36:13,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:13,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858757583] [2024-01-27 15:36:13,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:13,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:14,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858757583] [2024-01-27 15:36:14,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858757583] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:14,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433880169] [2024-01-27 15:36:14,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:36:14,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:14,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:14,438 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:14,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-27 15:36:14,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-01-27 15:36:14,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:14,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 40 conjunts are in the unsatisfiable core [2024-01-27 15:36:14,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:14,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-27 15:36:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:14,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:15,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2024-01-27 15:36:15,599 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:15,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 200 [2024-01-27 15:36:16,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:16,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433880169] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:16,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:16,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 10] total 31 [2024-01-27 15:36:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673073901] [2024-01-27 15:36:16,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:16,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:36:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:16,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:36:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:36:16,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:16,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 535 transitions, 7596 flow. Second operand has 32 states, 32 states have (on average 12.28125) internal successors, (393), 32 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:16,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:16,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:16,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:21,906 INFO L124 PetriNetUnfolderBase]: 7911/17388 cut-off events. [2024-01-27 15:36:21,906 INFO L125 PetriNetUnfolderBase]: For 304972/306526 co-relation queries the response was YES. [2024-01-27 15:36:22,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90565 conditions, 17388 events. 7911/17388 cut-off events. For 304972/306526 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 149473 event pairs, 1365 based on Foata normal form. 785/17050 useless extension candidates. Maximal degree in co-relation 90487. Up to 7038 conditions per place. [2024-01-27 15:36:22,073 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 252 selfloop transitions, 446 changer transitions 120/831 dead transitions. [2024-01-27 15:36:22,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 831 transitions, 11383 flow [2024-01-27 15:36:22,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-01-27 15:36:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2024-01-27 15:36:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 835 transitions. [2024-01-27 15:36:22,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5012004801920769 [2024-01-27 15:36:22,081 INFO L175 Difference]: Start difference. First operand has 221 places, 535 transitions, 7596 flow. Second operand 49 states and 835 transitions. [2024-01-27 15:36:22,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 831 transitions, 11383 flow [2024-01-27 15:36:23,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 831 transitions, 10655 flow, removed 344 selfloop flow, removed 12 redundant places. [2024-01-27 15:36:23,045 INFO L231 Difference]: Finished difference. Result has 264 places, 585 transitions, 9153 flow [2024-01-27 15:36:23,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=5520, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=293, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=9153, PETRI_PLACES=264, PETRI_TRANSITIONS=585} [2024-01-27 15:36:23,046 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 231 predicate places. [2024-01-27 15:36:23,046 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 585 transitions, 9153 flow [2024-01-27 15:36:23,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 12.28125) internal successors, (393), 32 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:23,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:23,046 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 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] [2024-01-27 15:36:23,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-01-27 15:36:23,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:23,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:23,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:23,268 INFO L85 PathProgramCache]: Analyzing trace with hash -51087241, now seen corresponding path program 4 times [2024-01-27 15:36:23,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:23,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146439651] [2024-01-27 15:36:23,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:23,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:23,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:23,396 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-01-27 15:36:23,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:23,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146439651] [2024-01-27 15:36:23,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146439651] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:23,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144221823] [2024-01-27 15:36:23,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:36:23,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:23,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:23,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:23,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-27 15:36:23,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:36:23,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:23,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjunts are in the unsatisfiable core [2024-01-27 15:36:23,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:23,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:23,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144221823] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:23,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:23,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2024-01-27 15:36:23,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122761876] [2024-01-27 15:36:23,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:23,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-01-27 15:36:23,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:23,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-01-27 15:36:23,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2024-01-27 15:36:24,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:24,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 585 transitions, 9153 flow. Second operand has 22 states, 22 states have (on average 12.954545454545455) internal successors, (285), 22 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:24,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:24,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:24,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:26,244 INFO L124 PetriNetUnfolderBase]: 2866/6651 cut-off events. [2024-01-27 15:36:26,245 INFO L125 PetriNetUnfolderBase]: For 111546/112154 co-relation queries the response was YES. [2024-01-27 15:36:26,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34231 conditions, 6651 events. 2866/6651 cut-off events. For 111546/112154 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 52126 event pairs, 1628 based on Foata normal form. 434/6626 useless extension candidates. Maximal degree in co-relation 34145. Up to 4167 conditions per place. [2024-01-27 15:36:26,293 INFO L140 encePairwiseOnDemand]: 27/34 looper letters, 185 selfloop transitions, 4 changer transitions 111/313 dead transitions. [2024-01-27 15:36:26,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 313 transitions, 4863 flow [2024-01-27 15:36:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-01-27 15:36:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-01-27 15:36:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 206 transitions. [2024-01-27 15:36:26,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5049019607843137 [2024-01-27 15:36:26,294 INFO L175 Difference]: Start difference. First operand has 264 places, 585 transitions, 9153 flow. Second operand 12 states and 206 transitions. [2024-01-27 15:36:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 313 transitions, 4863 flow [2024-01-27 15:36:26,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 4244 flow, removed 154 selfloop flow, removed 37 redundant places. [2024-01-27 15:36:26,505 INFO L231 Difference]: Finished difference. Result has 220 places, 202 transitions, 2686 flow [2024-01-27 15:36:26,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=3424, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2686, PETRI_PLACES=220, PETRI_TRANSITIONS=202} [2024-01-27 15:36:26,505 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 187 predicate places. [2024-01-27 15:36:26,505 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 202 transitions, 2686 flow [2024-01-27 15:36:26,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.954545454545455) internal successors, (285), 22 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:26,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:26,506 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 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] [2024-01-27 15:36:26,517 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:26,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-01-27 15:36:26,718 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:26,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:26,718 INFO L85 PathProgramCache]: Analyzing trace with hash 1830886990, now seen corresponding path program 5 times [2024-01-27 15:36:26,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:26,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767300274] [2024-01-27 15:36:26,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:26,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:36:26,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767300274] [2024-01-27 15:36:26,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767300274] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:26,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820907990] [2024-01-27 15:36:26,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-27 15:36:26,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:26,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:26,856 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:26,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-27 15:36:26,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-01-27 15:36:26,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:26,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2024-01-27 15:36:26,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:26,971 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:36:26,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-01-27 15:36:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820907990] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:27,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:27,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2024-01-27 15:36:27,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613501982] [2024-01-27 15:36:27,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:27,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-01-27 15:36:27,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:27,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-01-27 15:36:27,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-01-27 15:36:27,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 34 [2024-01-27 15:36:27,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 202 transitions, 2686 flow. Second operand has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:27,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:27,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 34 [2024-01-27 15:36:27,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:28,708 INFO L124 PetriNetUnfolderBase]: 4810/9867 cut-off events. [2024-01-27 15:36:28,708 INFO L125 PetriNetUnfolderBase]: For 138563/138563 co-relation queries the response was YES. [2024-01-27 15:36:28,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48604 conditions, 9867 events. 4810/9867 cut-off events. For 138563/138563 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 73047 event pairs, 356 based on Foata normal form. 166/9405 useless extension candidates. Maximal degree in co-relation 48532. Up to 2113 conditions per place. [2024-01-27 15:36:28,780 INFO L140 encePairwiseOnDemand]: 28/34 looper letters, 252 selfloop transitions, 152 changer transitions 34/446 dead transitions. [2024-01-27 15:36:28,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 446 transitions, 6574 flow [2024-01-27 15:36:28,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-01-27 15:36:28,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-01-27 15:36:28,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-01-27 15:36:28,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6018099547511312 [2024-01-27 15:36:28,782 INFO L175 Difference]: Start difference. First operand has 220 places, 202 transitions, 2686 flow. Second operand 13 states and 266 transitions. [2024-01-27 15:36:28,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 446 transitions, 6574 flow [2024-01-27 15:36:28,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 446 transitions, 5665 flow, removed 313 selfloop flow, removed 32 redundant places. [2024-01-27 15:36:28,952 INFO L231 Difference]: Finished difference. Result has 155 places, 292 transitions, 4566 flow [2024-01-27 15:36:28,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4566, PETRI_PLACES=155, PETRI_TRANSITIONS=292} [2024-01-27 15:36:28,952 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 122 predicate places. [2024-01-27 15:36:28,953 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 292 transitions, 4566 flow [2024-01-27 15:36:28,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.11111111111111) internal successors, (118), 9 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:28,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:28,953 INFO L208 CegarLoopForPetriNet]: trace histogram [6, 3, 2, 2, 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] [2024-01-27 15:36:28,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:29,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-01-27 15:36:29,165 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:29,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:29,165 INFO L85 PathProgramCache]: Analyzing trace with hash -244807459, now seen corresponding path program 6 times [2024-01-27 15:36:29,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:29,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740043394] [2024-01-27 15:36:29,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:29,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:30,690 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:30,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740043394] [2024-01-27 15:36:30,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740043394] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:30,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747759826] [2024-01-27 15:36:30,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-27 15:36:30,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:30,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:30,691 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:30,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-27 15:36:30,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-01-27 15:36:30,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:30,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 33 conjunts are in the unsatisfiable core [2024-01-27 15:36:30,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-01-27 15:36:31,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:31,284 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:31,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 60 [2024-01-27 15:36:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-01-27 15:36:31,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747759826] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:31,380 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:31,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 7] total 31 [2024-01-27 15:36:31,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837027945] [2024-01-27 15:36:31,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:31,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-01-27 15:36:31,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:31,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-01-27 15:36:31,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=827, Unknown=0, NotChecked=0, Total=992 [2024-01-27 15:36:31,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:31,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 292 transitions, 4566 flow. Second operand has 32 states, 32 states have (on average 12.5) internal successors, (400), 32 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:31,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:31,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:31,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:33,551 INFO L124 PetriNetUnfolderBase]: 3813/8442 cut-off events. [2024-01-27 15:36:33,551 INFO L125 PetriNetUnfolderBase]: For 54386/55052 co-relation queries the response was YES. [2024-01-27 15:36:33,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38522 conditions, 8442 events. 3813/8442 cut-off events. For 54386/55052 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 64558 event pairs, 716 based on Foata normal form. 261/8147 useless extension candidates. Maximal degree in co-relation 38467. Up to 2986 conditions per place. [2024-01-27 15:36:33,604 INFO L140 encePairwiseOnDemand]: 25/34 looper letters, 161 selfloop transitions, 219 changer transitions 78/472 dead transitions. [2024-01-27 15:36:33,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 472 transitions, 7133 flow [2024-01-27 15:36:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-01-27 15:36:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-01-27 15:36:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 428 transitions. [2024-01-27 15:36:33,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4841628959276018 [2024-01-27 15:36:33,607 INFO L175 Difference]: Start difference. First operand has 155 places, 292 transitions, 4566 flow. Second operand 26 states and 428 transitions. [2024-01-27 15:36:33,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 472 transitions, 7133 flow [2024-01-27 15:36:33,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 472 transitions, 6753 flow, removed 157 selfloop flow, removed 3 redundant places. [2024-01-27 15:36:33,889 INFO L231 Difference]: Finished difference. Result has 181 places, 323 transitions, 5370 flow [2024-01-27 15:36:33,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4318, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5370, PETRI_PLACES=181, PETRI_TRANSITIONS=323} [2024-01-27 15:36:33,890 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 148 predicate places. [2024-01-27 15:36:33,890 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 323 transitions, 5370 flow [2024-01-27 15:36:33,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 12.5) internal successors, (400), 32 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:33,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:33,891 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:33,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:34,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-27 15:36:34,095 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:34,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash -89639410, now seen corresponding path program 7 times [2024-01-27 15:36:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:34,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340799777] [2024-01-27 15:36:34,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:35,170 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:35,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:35,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340799777] [2024-01-27 15:36:35,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340799777] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:35,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348427343] [2024-01-27 15:36:35,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-27 15:36:35,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:35,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:35,172 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:35,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-27 15:36:35,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:35,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 39 conjunts are in the unsatisfiable core [2024-01-27 15:36:35,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:36,023 INFO L349 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2024-01-27 15:36:36,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 60 treesize of output 24 [2024-01-27 15:36:36,030 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:36,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:36,866 INFO L349 Elim1Store]: treesize reduction 24, result has 78.0 percent of original size [2024-01-27 15:36:36,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 106 treesize of output 114 [2024-01-27 15:36:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:37,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348427343] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:37,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 44 [2024-01-27 15:36:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96829117] [2024-01-27 15:36:37,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-01-27 15:36:37,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:37,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-01-27 15:36:37,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=1708, Unknown=0, NotChecked=0, Total=1980 [2024-01-27 15:36:38,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:38,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 323 transitions, 5370 flow. Second operand has 45 states, 45 states have (on average 12.022222222222222) internal successors, (541), 45 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:38,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:38,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:38,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:47,518 INFO L124 PetriNetUnfolderBase]: 11765/25748 cut-off events. [2024-01-27 15:36:47,518 INFO L125 PetriNetUnfolderBase]: For 160390/162822 co-relation queries the response was YES. [2024-01-27 15:36:47,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115729 conditions, 25748 events. 11765/25748 cut-off events. For 160390/162822 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 239227 event pairs, 1503 based on Foata normal form. 1619/25683 useless extension candidates. Maximal degree in co-relation 115671. Up to 4569 conditions per place. [2024-01-27 15:36:47,718 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 362 selfloop transitions, 811 changer transitions 339/1526 dead transitions. [2024-01-27 15:36:47,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1526 transitions, 22757 flow [2024-01-27 15:36:47,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2024-01-27 15:36:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2024-01-27 15:36:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 1334 transitions. [2024-01-27 15:36:47,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5231372549019608 [2024-01-27 15:36:47,733 INFO L175 Difference]: Start difference. First operand has 181 places, 323 transitions, 5370 flow. Second operand 75 states and 1334 transitions. [2024-01-27 15:36:47,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1526 transitions, 22757 flow [2024-01-27 15:36:48,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 1526 transitions, 21912 flow, removed 267 selfloop flow, removed 11 redundant places. [2024-01-27 15:36:48,267 INFO L231 Difference]: Finished difference. Result has 267 places, 906 transitions, 17175 flow [2024-01-27 15:36:48,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=4982, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=274, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=75, PETRI_FLOW=17175, PETRI_PLACES=267, PETRI_TRANSITIONS=906} [2024-01-27 15:36:48,273 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 234 predicate places. [2024-01-27 15:36:48,273 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 906 transitions, 17175 flow [2024-01-27 15:36:48,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 12.022222222222222) internal successors, (541), 45 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:48,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:48,274 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:48,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-27 15:36:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-01-27 15:36:48,486 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:48,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:48,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1017136266, now seen corresponding path program 8 times [2024-01-27 15:36:48,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:48,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784597748] [2024-01-27 15:36:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:48,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:49,481 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:49,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:49,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784597748] [2024-01-27 15:36:49,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784597748] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:49,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777440469] [2024-01-27 15:36:49,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-27 15:36:49,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:49,482 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:49,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-27 15:36:49,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-27 15:36:49,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:49,608 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:36:49,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:50,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:50,815 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:50,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-01-27 15:36:51,158 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:51,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777440469] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:51,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:51,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 46 [2024-01-27 15:36:51,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083039533] [2024-01-27 15:36:51,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:51,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-01-27 15:36:51,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:51,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-01-27 15:36:51,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=432, Invalid=1730, Unknown=0, NotChecked=0, Total=2162 [2024-01-27 15:36:51,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:51,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 906 transitions, 17175 flow. Second operand has 47 states, 47 states have (on average 11.893617021276595) internal successors, (559), 47 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:51,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:51,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:51,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:36:55,896 INFO L124 PetriNetUnfolderBase]: 4417/9893 cut-off events. [2024-01-27 15:36:55,897 INFO L125 PetriNetUnfolderBase]: For 165226/166084 co-relation queries the response was YES. [2024-01-27 15:36:55,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54918 conditions, 9893 events. 4417/9893 cut-off events. For 165226/166084 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 80213 event pairs, 603 based on Foata normal form. 442/9637 useless extension candidates. Maximal degree in co-relation 54839. Up to 3461 conditions per place. [2024-01-27 15:36:55,979 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 201 selfloop transitions, 340 changer transitions 171/726 dead transitions. [2024-01-27 15:36:55,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 726 transitions, 10958 flow [2024-01-27 15:36:55,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-01-27 15:36:55,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2024-01-27 15:36:55,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 996 transitions. [2024-01-27 15:36:55,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4802314368370299 [2024-01-27 15:36:55,982 INFO L175 Difference]: Start difference. First operand has 267 places, 906 transitions, 17175 flow. Second operand 61 states and 996 transitions. [2024-01-27 15:36:55,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 726 transitions, 10958 flow [2024-01-27 15:36:56,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 726 transitions, 10226 flow, removed 252 selfloop flow, removed 22 redundant places. [2024-01-27 15:36:56,279 INFO L231 Difference]: Finished difference. Result has 288 places, 421 transitions, 8034 flow [2024-01-27 15:36:56,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=6038, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=8034, PETRI_PLACES=288, PETRI_TRANSITIONS=421} [2024-01-27 15:36:56,280 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 255 predicate places. [2024-01-27 15:36:56,280 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 421 transitions, 8034 flow [2024-01-27 15:36:56,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 11.893617021276595) internal successors, (559), 47 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:56,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:36:56,281 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:36:56,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-01-27 15:36:56,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-27 15:36:56,488 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:36:56,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:36:56,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1966749536, now seen corresponding path program 9 times [2024-01-27 15:36:56,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:36:56,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804375728] [2024-01-27 15:36:56,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:36:56,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:36:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:36:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:57,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:36:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804375728] [2024-01-27 15:36:57,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804375728] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:36:57,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280022094] [2024-01-27 15:36:57,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-27 15:36:57,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:36:57,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:36:57,491 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:36:57,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-27 15:36:57,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-01-27 15:36:57,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:36:57,594 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 46 conjunts are in the unsatisfiable core [2024-01-27 15:36:57,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:36:58,185 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:58,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:36:58,675 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:36:58,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 108 treesize of output 114 [2024-01-27 15:36:59,016 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:36:59,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280022094] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-27 15:36:59,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-01-27 15:36:59,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 44 [2024-01-27 15:36:59,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843514417] [2024-01-27 15:36:59,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-01-27 15:36:59,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-01-27 15:36:59,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-27 15:36:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-01-27 15:36:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1598, Unknown=0, NotChecked=0, Total=1980 [2024-01-27 15:36:59,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-01-27 15:36:59,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 421 transitions, 8034 flow. Second operand has 45 states, 45 states have (on average 11.822222222222223) internal successors, (532), 45 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:36:59,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-27 15:36:59,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-01-27 15:36:59,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-27 15:37:03,214 INFO L124 PetriNetUnfolderBase]: 5063/11205 cut-off events. [2024-01-27 15:37:03,214 INFO L125 PetriNetUnfolderBase]: For 197166/198198 co-relation queries the response was YES. [2024-01-27 15:37:03,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64874 conditions, 11205 events. 5063/11205 cut-off events. For 197166/198198 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 92410 event pairs, 1075 based on Foata normal form. 384/10780 useless extension candidates. Maximal degree in co-relation 64794. Up to 4219 conditions per place. [2024-01-27 15:37:03,295 INFO L140 encePairwiseOnDemand]: 24/34 looper letters, 212 selfloop transitions, 360 changer transitions 182/768 dead transitions. [2024-01-27 15:37:03,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 768 transitions, 12644 flow [2024-01-27 15:37:03,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-01-27 15:37:03,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2024-01-27 15:37:03,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 854 transitions. [2024-01-27 15:37:03,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4830316742081448 [2024-01-27 15:37:03,298 INFO L175 Difference]: Start difference. First operand has 288 places, 421 transitions, 8034 flow. Second operand 52 states and 854 transitions. [2024-01-27 15:37:03,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 768 transitions, 12644 flow [2024-01-27 15:37:03,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 768 transitions, 12209 flow, removed 111 selfloop flow, removed 28 redundant places. [2024-01-27 15:37:03,795 INFO L231 Difference]: Finished difference. Result has 311 places, 471 transitions, 9784 flow [2024-01-27 15:37:03,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=7664, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=9784, PETRI_PLACES=311, PETRI_TRANSITIONS=471} [2024-01-27 15:37:03,796 INFO L281 CegarLoopForPetriNet]: 33 programPoint places, 278 predicate places. [2024-01-27 15:37:03,796 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 471 transitions, 9784 flow [2024-01-27 15:37:03,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 11.822222222222223) internal successors, (532), 45 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-27 15:37:03,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-27 15:37:03,797 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-27 15:37:03,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-27 15:37:04,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:37:04,009 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-01-27 15:37:04,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-27 15:37:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1468325514, now seen corresponding path program 10 times [2024-01-27 15:37:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-27 15:37:04,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600914021] [2024-01-27 15:37:04,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-27 15:37:04,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-27 15:37:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-27 15:37:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:04,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-27 15:37:04,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600914021] [2024-01-27 15:37:04,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600914021] provided 0 perfect and 1 imperfect interpolant sequences [2024-01-27 15:37:04,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740848388] [2024-01-27 15:37:04,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-27 15:37:04,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-27 15:37:04,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-27 15:37:04,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-27 15:37:04,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-27 15:37:04,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-27 15:37:04,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-27 15:37:04,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 49 conjunts are in the unsatisfiable core [2024-01-27 15:37:04,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-27 15:37:04,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-01-27 15:37:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-27 15:37:05,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-27 15:37:07,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 198 treesize of output 180 [2024-01-27 15:37:07,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-01-27 15:37:07,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 556 treesize of output 540